Welch Vacuum Pumps

Welch ChemStar 5.3 cfm PTFE Oil-Free Deep Vacuum Diaphragm Pump   With the new ChemStar Dry, you get the advantages of two combined technologies: Roots blower and diaphragm vacuum pump. The result is an oil-free, software- driven vacuum system, ready to work on your tough chemical applications – clean, fast, and thorough. ChemStar Dry pumps quickly down (9 m³/h) to the working range for most evaporative operations (2.0 to 0.1 mbar) with an ultimate pressure of 10-2 mbar. The innovative electronically controlled vapour load optimises the pumping speed control. You can even pump corrosive vapours, since all wetted parts of the system are coated with PTFE and other proprietary coatings so they are chemical resistant. The integrated self-cleaning function also contributes to the system’s long lifetime and enables repeatable results. Take advantage of its state-of-the-art technology for optimal operating conditions and results. ChemStar Dry is suitable for all applications where high gas flow and deep vacuum are needed. Advantages: Oil-Free: no oil back-streaming, no oil maintenance/disposal, cleaner work place, cleaner samples, less maintenance Plug and Play: patented software control, auto speed control from atm to 0.07 mbar, self-cleaning function, protection from surges Low vacuum mostly without cold trap: no dry ice or trap apparatus needed, less maintenance, lower cost of ownership, extra bench space Chemical Resistant: pumps corrosive vapour/gases, TFE and proprietary coatings   SKU 2070B-01 Max. pumping speed at 50 Hz in m³/h (l/min) 8.4 (140) Max pumping speed at 60 Hz in m³/h (l/min) 10.1 (168) Ultimate pressure in mbar (Torr) without gas ballast 7x10-2 Wired for 230V, 50/60Hz Intake connection DN 25 KF Exhaust connection DN 25 KF Sound level (dB) 57 Dimensions (W/D/H) in mm 460/220/470 Weight kg (lbs) 23 (50.7)

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Welch CRVpro30 Two-Stage Rotary Vane Pumps   •Consumes up to 36% less oil than comparable pumps. •Runs 10°C cooler than comparable pumps. Slows corrosion. •Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals. •Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts. •Available in 115V/60Hz. •Free air displacement @60Hz: 22.1 cfm (627 L/min) •Ultimate pressure: 3x10-3 mbar (2x10-3 Torr). CRVpro vacuum pumps are two-stage direct-driven vacuum pumps. They are nine models of CRVpro available with free air displacement from 1.8 cfm to 52.5 cfm. Ultimate pressure to 2x10⁻³ torr. Three models of pumps with explosion proof motors, with free air displacements from 2.8 to 12.8 cfm, are available by clicking on the "Explosion Proof" tab below. The benefits of CRVpro pumps are: reduced risk of chemical attacks and oil breakdown by diluting chemical vapors with a larger oil chamber slowing down corrosion by cool running operation provides a measure of protection from sublimed chemical vapors with coating on pump module and oil case. These benefits lead to extended service interval. Depending on model, motor options include 1 Ph TEFC, 3 Ph TEFC, and 1 Ph ex proof motors. Welch vacuum pump oil is specifically formulated for the unique needs of vacuum pumps. Use of non-Welch vacuum pump oil voids any performance claims and product warranties. •In Duoseal belt driven rotary vane pumps, use Welch Duoseal or Welch Gold Oil •In CRVpro rotary vane pumps use Welch premium or Welch gold oil •In Chemstar belt driven rotary vane pumps use Welch gold oil CRVpro vacuum pumps can be used for freeze drying, vacuum ovens, concentrators, glove boxes, schlenk lines, HVAC/refrigeration service, coaters, backing diffusion pumps and turbo molecular pumps, short path, wiped film, metallurgy/vacuum furnaces, lamp manufacture, space simulation, degassing, vessel/chamber evacuation. CRVpro vacuum pumps prepared with perfluoropolyether (PFPE) for oxygen service are available. Contact your local Welch sales representative for details on PFPE prepared pumps and for selecting correct vacuum pump for your application. Weight 99 Ultimate Pressure 3 x10⁻³ Dimensions (mm) 683x384x389 Free Air Desplacement 22.1 (627)

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Welch 2085 (CSA/UL) Certified    Corrosion Resistant Free Air Displacement of 195 l/min (6.9 cfm) Ultimate Vacuum Pressure 26" Hg (100 torr) Fitted Explosion Proof Motor (Class I, Groups C & D; Class II Groups F & G) with CSA/UL Mark Portable   Welch corrosion-resistant diaphragm vacuum pumps are driven by explosion-proof motors rated for Class I Hazardous Locations(HazLoc). The aluminum pup head is PTFE coated and diaphragm is covered by a PTFE liner to separate chemical media from the diaphragm. The explosion proof motor is directly coupled to the diaphragm pumping module. Stainless steel tubing is used to connect pump heads together in one and two-stage configurations. The vacuum pump doesn’t come with an on/off switch, plug or cord, but must be conduit wired to the on/off explosion proof control panel. Always use a certified electrician for proper installation of vacuum pump with explosion proof motor to meet your local municipal codes. Contact your local Welch area sales manager for further information     Model 2085 FAD, lpm (cfm 195 (6.9) Ultimate Pressure, Torr 100 Max. Vac., in. Hg 26 Head Material Coated PTFE Diaphragm liner PTFE Inlet/Outlet connection NW25 Motor Type Ex Proof Electrical requirement 115/230V 60Hz 1Ph Weight, lbs(kg) 54 (25.5) Dimensions, LxWxH 27 x 11.3 x 11.3

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Welch 2090 Chemical Duty Diaphragm Pumps with Explosion Proof Motor (CSA/UL)     Corrosion- resistant Flow from 4.5 to 6.9 cfm Maximum vacuum to 29 in. Hg(25 Torr) Fitted with Class I, Groups C&D explosion proof motor(CSA/UL) Portable     Welch corrosion-resistant diaphragm vacuum pumps are driven by explosion-proof motors rated for Class I Hazardous Locations(HazLoc). The aluminum pup head is PTFE coated and diaphragm is covered by a PTFE liner to separate chemical media from the diaphragm. The explosion proof motor is directly coupled to the diaphragm pumping module. Stainless steel tubing is used to connect pump heads together in one and two-stage configurations. The vacuum pump doesn’t come with an on/off switch, plug or cord, but must be conduit wired to the on/off explosion proof control panel. Always use a certified electrician for proper installation of vacuum pump with explosion proof motor to meet your local municipal codes. Contact your local Welch area sales manager for further information     Model 2090 FAD, lpm (cfm 127 (4.5) Ultimate Pressure, Torr 25 Max. Vac., in. Hg 29 Head Material Coated PTFE Diaphragm liner PTFE Inlet/Outlet connection NW25 Motor Type Ex Proof1 Electrical requirement 115/230V 60Hz 1Ph Weight, lbs(kg) 54 (25.5) Dimensions, LxWxH 24.6 x 11.1 x 11.3

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Welch 6.1 cfm Full Chemical-Resistant 8-Head Diaphragm Pump The Welch 6.1CFM Full Chemical-Resistant 8-Head Diaphragm Pump is the ideal choice for 50L Rotary Evaporators and large oven systems. This high capacity, full chemical resistant pump gives users the ability to vac down large capacity spaces quickly, efficiently, and cleanly without worrying about contamination of pump oil. The inner diaphragm is lined with PTFE making it highly chemical resistant and long lasting. It is one of the quietest and cleanest running vacuum pumps on the market. Key Features: Fully Chemical-Resistant Oil-less diaphragm style vacuum pump High capacity vacuum capability Specifications: Electrical Requirements: 110v 60Hz single phase Pumping Rate: 6.1cfm / 174L/min Gasket Material: All-PTFE Ultimate Vacuum level: 6 torr / 8 mbar Maximum Vacuum: 29.9 inHg Inlet / Outlet: KF16 Flange Adjustable vac. / gas ballast: No Unit dimensions (LxWxH in): 21x10x12 in Shipping dimensions (LxWxH in): 28x15x20 in Shipping weight (lbs): 90   Technical Data Free Air Displacement @ 60 Hz, cfm (L/min) 6.1 (173) Ultimate Pressure, torr 6 Motor Power, HP (kW) at 60 Hz Motor Power, HP (kW) at 60 Hz Inlet (Exhaust) Connection Thread NPT NW16 - 1/4" NPT Tubing Needed, I.D. in. (mm) Hose Connector Available Weight, lbs (kg) 72.3 (32.8) Dimensions, LxWxH, in (mm) 21x11x12 (530x280x310) 115V Order Number 2064B-01   ***Note: Purchase of this pump is subject to End User Verification. A certification form must be filled out before completion of purchase.***

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Welch Explosion Proof CRVpro8 Direct Drive Rotary Vane Vacuum Pump  ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details The new CRVpro family of direct drive vacuum pumps offers increased reliability and longer service interval vs. other direct drive rotary vane vacuum pumps. The CRVpro family consumes up to 36% less oil than comparable pumps. Three features drive these benefits:  Runs 10°C cooler than comparable pumps. Slows corrosion.  Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals.  Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts.  The CRVpro family includes all the features you'd expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.  Suitable applications include freeze drying, degassing, vacuum ovens and concentrators. 3086E-01 comes with an explosion proof motor. Conduit wiring installation required. No cord, plug, or switch provided.  Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr   Specifications Application CRVpro8 Free Air Displacement @ 60 Hz, cfm (L/min) 5.6 (158) Free Air Displacement @ 50 Hz, m³/hr (L/min) 8 (133) Ultimate Pressure, torr (mbar) 5x10⁻⁴ (4x10⁻⁴) Noise Level, dBA 50 Motor Speed, RPM, @60Hz, @50Hz 1740 (1450) Motor Power, HP (kW) 0.4 (0.5) Oil Capacity, mL 1000 Connection Flanges NW 16 Inlet Hose Connection* 5/8" to 3/4" Weight, lbs (kg) 49.6 (22.5) Dimensions, LxWxH, in (mm) 18.2x6.1x9.1 (463x157x230)

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Welch High Capacity Diaphragm Pumps 2062 ***Note: This item has a possible 1-2 week lead time depending on stock availability*** High Capacity dry diaphragm vacuum pump. PTFE contact surfaces, deep vacuum at with high flow. PTFE Pump, 8 heads. 115V 60HZ 1.5 TORR 119 LPM   Specifications Includes 1/4" OD hose barb Common accessory, not included Vacuum Controller Pumping Speed 119 Lit/min. (4.2 CFM) Max. Vacuum 1.5 Torr (2 mbar) 29.9" Hg Tubing Needed 1/4" ID Inlet Connection UNIBARB Exhaust 1/4" OD Dimensions LxWxH inches 21x11x12 Weight 72 LBS Wiring 115V, 60 hz

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Welch High Capacity Diaphragm Pump 2052   High Capacity dry diaphragm vacuum pump. PTFE contact surfaces, deep vacuum at with high flow. PTFE PUMP 115V 60HZ 1.5 TORR 64 LPM   Free Air Displacement cfm (L min.) 2.3 Ult. Vac. Pressure, torr (mbar) 1.5 (2) Maximum Vacuum, in. Hg 29.9 Motor Horsepower - HP (wattS) 0.53 (390) Adjustable Vac J Gas Ballast No Tubing Nftftriftri. J.D. m. (mm) 1/4 (8) fntake (Exhaust) Thread NPT NW 16-1/4" MPT Weight Ibs. (kg) 40.3 (18.3) Overall Dimensions L x W x H in. (cm) 9 x 15 x 7 (22.8 x 38.1 x 17.8) Slip Weight, lbs. (kg) 49.8 (22.6) Snipping Carton Dimensions L x W x H in. (cm) 10.2 x 16.6 x 7.5 (26 x 42 x 19)

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Welch Explosion Proof  CRVpro4 Direct Drive Rotary Vane Vacuum Pump  ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details Explosion Proof Motor 110-120V/208-240V 60Hz 1 Phase The new CRVpro family of direct drive vacuum pumps offers increased reliability and longer service interval vs. other direct drive rotary vane vacuum pumps. The CRVpro family consumes up to 36% less oil than comparable pumps. Three features drive these benefits:  Runs 10°C cooler than comparable pumps. Slows corrosion.  Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals.  Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts.  The CRVpro family includes all the features you'd expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.  Suitable applications include freeze drying, degassing, vacuum ovens and concentrators.   3046E-01 comes with an explosion proof motor. Conduit wiring installation required. No cord, plug, or switch provided.  Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr.   Specifications Application CRVpro4 Free Air Displacement @ 60 Hz, cfm (L/min) 2.8 (78) Free Air Displacement @ 50 Hz, m³/hr (L/min) 4 (67) Ultimate Pressure, torr (mbar) 5x10⁻⁴ (4x10⁻⁴) Noise Level, dBA 50 Motor Speed, RPM, @60Hz, @50Hz 1740 (1450) Motor Power, HP (kW) 0.4 (0.5) Oil Capacity, mL 1150 Connection Flanges NW 16 Inlet Hose Connection* 5/8" to 3/4" Weight, lbs (kg) 46.3 (21) Dimensions, LxWxH, in (mm) 18.2x6.1x9.1 (463x157x230)

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Welch BTpro170 ***Note: This item has a possible lead time of 2-3 weeks depending on stock availability.*** Welch’s BTpro vacuum pump series has a flow and vacuum level to provide fast performance for your size of rotary evaporator, glass reactor, purge oven, or winterization filtration apparatus. These chemical duty PTFE diaphragm pumps are oil-free. The pumping action and deep vacuum comes from the movement of PTFE diaphragms within PTFE heads. All wetted services in the flow path are made of fluoroplastic making the BTpro pump highly chemically resistant. As a result, the BTpro vacuum pump series is near-zero maintenance. A cold trap placed in-line with BTpro pump is needed if terpenes are part of the flow path.   Model BTpro170 2163 Free Air Displacement@60Hz,lpm(CFM) 170 (6.0) 170 (6.0) Ultimate Vacuum Pressure, Torr 6 6 Maximum Vacuum, in. Hg 29.7 29.7 Horsepower, HP (watts) 0.6(440) 0.6(440) Built-in adjustable vacuum - - Gas Ballast Yes Yes Head Material PTFE Coated Al Diaphragm PTFE PTFE Inlet/outlet Connection NW16 flange NW16 flange Agency (National Recognized Lab) cUL cUL Weight, lbs (kg) 72.3 (32.8) 72.3 (32.8) Overall DimensionsLxWxH in.(cm) 21x11x12(53x28x31) 21x11x12(53x28x31) Shipping Weight, lbs(kg) 88.2 (40.1) 88.2 (40.1) Shipping Carton Dimensions LxWxH in.(cm) 23.6x15.8x16.1 60x40x41 23.6x15.8x16.1 60x40x41

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WELCH Self-Cleaning Vacuum System 2025 Product Details Automatic Self-cleaning purge maintains efficiency, extends diaphragm life Free air displacement: 35 L/min (1.2 CFM) Incremental ballast switch enables fast response to bumping / foaming Complete oil-free dry vacuum systems for rotary evaporators and concentrators. Corrosion-resistant PTFE diaphragm vacuum pump systems enable superior control and efficiency for each evaporation. Provides controlled solvent stripping in flasks up to 5 L. Use 9 torr Model 2025 for solvents with atmospheric B.P. <120o C. Includes analog gauge and vacuum regulation. Inlet and exhaust separators protect pump and lab atmosphere.    Specification Model Number 2025 Applications Controlled vacuum for Rotary evaporators, Centrifugal concentrators, and other evaporative processes. Type Laboratory Vacuum Pump Free Air Displacement m3/hr (l/min.) @50Hz 1.2(34) Ultimate Pressure 1.7(28) Max Pressure PSIG (pascal) 29.5 Adjustable Vac. / Gas Ballast 1/5 Tubing Needed Yes Intake Thread NPT 1/4 Overall Dimensions LxWxH in. (cm) 13.6x12x11.3 (34.5x30.5x28.7) Ship Weight 36(16.3) Intake Catch Jar Yes Exhaust Catch Jar Yes

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Welch CRVpro Direct Drive Rotary Vane Vacuum Pump CRVpro6 ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details The new CRVpro family of direct drive vacuum pumps offers increased reliability and longer service interval vs. other direct drive rotary vane vacuum pumps. The CRVpro family consumes up to 36% less oil than comparable pumps. Three features drive these benefits:  Runs 10°C cooler than comparable pumps. Slows corrosion.  Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals.  Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts.  The CRVpro family includes all the features you'd expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.  Suitable applications include freeze drying, degassing, vacuum ovens and concentrators. 3061-01 is wired for North American 115V, 60Hz operation. Includes North American line cord, vacuum inlet hose barb suitable for gum rubber hose from 5/8" to 3/4" ID, and a charge of oil.  3062-01 is wired for North American 230V, 60Hz operation. Includes 230V North American line cord, UK cord, and skuko cord, and a charge of oil.  Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr.

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Welch DryFast Ultra Diaphragm Pump 2042 This item may carry up to a 5 day lead time. Product Details Chemical Resistant Oil-Free Tuneable Vacuum Welch DryFastTM PTFE Diaphragm Vacuum Pumps enable precise vacuum control for organic evaporations with exclusive Advanced Vapor Management (AVM). Oil-Free, portable, chemical resistant, 2 head diaphragm design simplifies maintenance. Choose from seven dry PTFE vacuum pump models with flows up to 70 L / min and adjustable vacuum down to 2 Torr. Economical DryFastTM vacuum pumps are perfect for tough lab applications.     Specifications Model Number 2042 Application Rotary Evaporation/Distillation (lowvolatility solvents <160oC B.P., ~ 2 Liter), Centrifugal Concentrators, Vacuum ovens (mid- size), pumping harsh vapors & gases Type Laboratory Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz 1.2(35) Free Air Displacement m3/hr (l/min.) @50Hz 1.75(29) Ultimate Pressure 2(2.7) Maximum Vacuum 29.85 Motor Horsepower (watts) 1/5(150) Adjustable Vac. / Gas Ballast Yes Tubing Needed 1/4(7) Intake Thread NPT M14(1/8) Overall Dimensions LxWxH in. (cm) 13.8x6.8x8.8(35.2x7.2x22.3) Ship Weight 25(11.3) Shipping Carton Dimensions LxWxH in. (cm) 21x14x15 (52x35x37) Adjustable Vacuum Knob

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Welch DUOSEAL Two Stage - Refrigeration ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details: 115V, 60Hz, 1 Ph with N.Amer, 115V Plug Deep vacuum for fast evacuation and dehydration Durable pump, precision machined Gas ballast for high vapor loads. Rugged DuoSeal belt-drive vacuum pumps enable fast, thorough evacuation of refrigeration systems. Features high flow and deep vacuum with low pump RPM and large oil reservoirs for extended life and reduced maintenance. Includes handles for enable positioning.    Specifications: Model Number 1402B-46 Applications Service Lithium Bromide absorption chillers to 500 -700 tons, fluorcarbon or ammonia chillers to 100 to 200 tons Type DUOSEAL Two Stage - Refrigeration Free Air Displacement m3/hr (l/min.) @50Hz 5.6 Ultimate Pressure 160 Maximum Vacuum 1 x 10-4 (1.3 x 10-4) Oil Capacity 525 Motor Horsepower (watts) 2.25 Adjustable Vac. / Gas Ballast Yes Tubing Needed 13/16" ID Hose or 3/4" Flare Fitting Intake Thread NPT 1-20 ISO Exhaust / Intake Flange 1-20 Overall Dimensions LxWxH in.  20" x 12" x 15" Ship Weight 128(58)

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Welch CRVpro Direct Drive Rotary Vane Vacuum Pump CRVpro8 ***Note: This item has a possible 1-2 week lead time depending on stock availability***   Product Details The new CRVpro family of direct drive vacuum pumps offers increased reliability and longer service interval vs. other direct drive rotary vane vacuum pumps. The CRVpro family consumes up to 36% less oil than comparable pumps. Three features drive these benefits:  Runs 10°C cooler than comparable pumps. Slows corrosion.  Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals.  Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts.  The CRVpro family includes all the features you'd expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.  Suitable applications include freeze drying, degassing, vacuum ovens and concentrators. 3081-01 is wired for North American 115V, 60Hz operation. Includes North American line cord, vacuum inlet hose barb suitable for gum rubber hose from 5/8" to 3/4" ID, and a charge of oil.  3082-01 is wired for North American 230V, 60Hz operation. Includes 230V North American line cord, UK cord, and skuko cord, and a charge of oil.  Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr   Specifications Application CRVpro8 Free Air Displacement @ 60 Hz, cfm (L/min) 5.6 (158) Free Air Displacement @ 50 Hz, m³/hr (L/min) 8 (133) Ultimate Pressure, torr (mbar) 5x10⁻⁴ (4x10⁻⁴) Noise Level, dBA 50 Motor Speed, RPM, @60Hz, @50Hz 1740 (1450) Motor Power, HP (kW) 0.4 (0.5) Oil Capacity, mL 1000 Connection Flanges NW 16 Inlet Hose Connection* 5/8" to 3/4" Weight, lbs (kg) 49.6 (22.5) Dimensions, LxWxH, in (mm) 18.2x6.1x9.1 (463x157x230)

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Welch ProBoost Air-Cooled Diffusion Pump Product Details Use Welch ProBoost in conjunction with a backing pump like the CRVpro to get deeper vacuum and higher flow.  High Vacuum to 10⁻⁵ torr Use with high vacuum and Schlenk lines Employs air cooled diffusion pump Easy Attachment to backing pump  Welch ProBoost is an air cooled gas jet pump (commonly called a diffusion pump). The gas jet is formed by directing boiling silicone vapors through a hollow cone. There are no internal moving parts. The pumping action commences when the vacuum pressure in the still (i.e. wiped film) goes below 0.2 torr (200 millitorr). On an empty, leak free still, ProBoost backed by a rotary vane pump lowers the vacuum pressure to 0.00002 torr (20x lower in pressure than a 2-stage rotary vane vacuum pump can do alone).  ProBoost backed by a rotary vane vacuum pump will lower vacuum pressure to below 0.0001 torr in high vacuum and Schlenk lines. This high vacuum is invaluable to improve the results from reactions using air-sensitive compounds such as organometallics, metal amides, and hydrides.  ProBoost has a built-in control board for fan and heater. When you turn on ProBoost, the fan and heater both turn on. When you turn off ProBoost, the heater turns off immediately and the fan runs for another 20 minutes to cool the pump.      Specifications Maximum Pumping Speed, Air 80 l/sec Ultimate Vacuum Pressure 0.00002 torr Minimum Back Pump FAD at 60 Hz 2.8 CFM Maximum Discharge Pressure 0.2 torr Ambient Environmental Temp 10–30°C Heat-up time 7 minutes Inlet Connection NW50 Discharge Connection NW25 Silicone Oil Capacity Approximately 30 ml Cool Down Time 20 minutes Pump Dimensions, L x W x H 5.5 x 5.4 x 7.5 in Weight 5.6 lbs (2.5 kg)   Download Manual  

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Welch CRVpro Direct Drive Rotary Vane Vacuum Pump CRVpro4 ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details The new CRVpro family of direct drive vacuum pumps offers increased reliability and longer service interval vs. other direct drive rotary vane vacuum pumps. The CRVpro family consumes up to 36% less oil than comparable pumps. Three features drive these benefits:  Runs 10°C cooler than comparable pumps. Slows corrosion.  Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals.  Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts.  The CRVpro family includes all the features you'd expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.  Suitable applications include freeze drying, degassing, vacuum ovens and concentrators. 3041-01 is wired for North American 115V, 60Hz operation. Includes North American line cord, vacuum inlet hose barb suitable for gum rubber hose from 5/8" to 3/4" ID, and a charge of oil.  3042-01 is wired for North American 230V, 60Hz operation. Includes 230V North American line cord, UK cord, and skuko cord, and a charge of oil.  3046E-01 comes with an explosion proof motor. Conduit wiring installation required. No cord, plug, or switch provided.  Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr.    Specifications  Applications CRVpro4 Free Air Displacement @ 60 Hz, cfm (L/min) 2.8 (78) Free Air Displacement @ 50 Hz, m³/hr (L/min) 4 (67) Ultimate Pressure, torr (mbar) 5x10⁻⁴ (4x10⁻⁴) Noise Level, dBA 50 Motor Speed, RPM, @60Hz, @50Hz 1740 (1450) 1750 (1450) Motor Power, HP (kW) 0.4 (0.5) Oil Capacity, mL 1150 Connection Flanges NW 16 Inlet Hose Connection* 5/8" to 3/4" Weight, lbs (kg) 46.3 (21) Dimensions, LxWxH, in (mm) 18.2x6.1x9.1 (463x157x230)

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Welch BTpro70  ***Note: This item has a possible lead time of 2-3 weeks depending on stock availability.***   Welch’s BTpro vacuum pump series has a flow and vacuum level to provide fast performance for your size of rotary evaporator, glass reactor, purge oven, or winterization filtration apparatus. These chemical duty PTFE diaphragm pumps are oil-free. The pumping action and deep vacuum comes from the movement of PTFE diaphragms within PTFE heads. All wetted services in the flow path are made of fluoroplastic making the BTpro pump highly chemically resistant. As a result, the BTpro vacuum pump series is near-zero maintenance. A cold trap placed in-line with BTpro pump is needed if terpenes are part of the flow path. The BTpro40 and BTpro70 models employ patented valve and diaphragm technology that generates a deep 15 Torr vacuum pressure with each PTFE head. In addition, both pump models have built-in tuneable vacuum to control evaporation rate. The tunable vacuum adjustment can also be used to stop accidental bumping/foaming.       Model BTpro70 Free Air Displacement@60Hz,lpm(CFM) 70(2.5) Ultimate Vacuum Pressure, Torr 15 Maximum Vacuum, in. Hg 29.3 Horsepower, HP (watts) 1/5(150) Built-in adjustable vacuum Yes Gas Ballast - Head Material PTFE Diaphragm PTFE Inlet/outlet Connection 3/8” barb Agency (National Recognized Lab) CSA Weight, lbs (kg) 21.3(9.6) Overall Dimensions LxWxH in.(cm) 13.8x6.8x8.8 35x17x22 Shipping Weight, lbs(kg) 25 (11.3) Shipping Carton Dimensions LxWxH in.(cm) 21x14x15 (52x35x37)

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Welch ChemStar 1400N 0.9 cfm 0.1 Micron Belt Drive 2-Stage Pump ***Note: This item has a possible 1-2 week lead time depending on stock availability.***  Product Details Low rotation speed for longer service life Vital parts corrosion resistant Large oil reservoir dilutes contaminants ChemStar belt-driven Vacuum Pump is designed to tolerate harsh chemical contamination. Vital pump parts are corrosion resistant. The large oil reservoir with PTFE surfaces dilutes contamination and the low pump rotational speed lessens friction to reduce operating temperature and chemical effects. PTFE surfaces, fluorcarbon gaskets and seals, Nitrogen purge to cool and degas oil. ChemStar system comes with Gold Oil, a synthetic lubricant designed to minimize effects of chemical contaminants.   Specifications Model Number 1400N Application Vacuum Manifolds, (Schlenk Lines), High boiling point evaporations (to 195 deg. C), General laboratory. HCl, O3, H2SO4*HBr, HOAC, SOx*Br2, F3CCO2H, H2S*Cl2, CH2O, HNO3*SF6, CF4 Fragments and other gases; Type Belt-Drive Vacuum Pump, chemical resistant Free Air Displacement cfm (l/min.) @60Hz 0.9(25) Ultimate Pressure 1 x10-4(0.00013) Pump RPM 580 Oil Capacity 0.62(0.59) Motor Horsepower (watts) 1/3(250) Adjustable Vac. / Gas Ballast Yes Tubing Needed 7/16(11) ISO Exhaust / Intake Flange NW 16 Overall Dimensions LxWxH in. (cm) 17.8x9x12.6 (45.2x22.9x32) Ship Weight 71(32.3) Shipping Carton Dimensions LxWxH in. (cm) 20.5x13.8x14.5 (52.1x35.1x36.8)

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DryFast Diaphragm Pump 2044   Welch DryFast™ PTFE Diaphragm Vacuum Pumps enable precise vacuum control for organic evaporations with exclusive Advanced Vapor Management (AVM). Oil-Free, portable, chemical resistant, dual head diaphragm design simplifies maintenance. Choose from seven dry PTFE vacuum pump models with flows up to 70 L / min and adjustable vacuum down to 2 Torr. Economical DryFastTM vacuum pumps are perfect for tough lab applications.   Product Details: Chemical Resistant Oil-Free Tuneable Vacuum   Suggested Applications: Concentrator - Gel Dryer Combination Rotary Evaporator Vacuum Concentrator   Test Equipment General Attributes Free Air Displacement @ 60 Hz, cfm (L/min) 1.2 (35) Ultimate Pressure, torr 9 Motor Power, HP (kW) at 60 Hz 1/5 (150) Inlet (Exhaust) Connection Thread NPT M14 (1/8) Tubing Needed, I.D. in. (mm) 1/4 (7) Weight, lbs (kg) 21.25 (9.6) Shipping Height 13.8x6.8x8.8 (350x170x220) 115V Order Number 2044B-01

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The Welch 1400 DuoSeal is an ideal choice for short path distillation and other general laboratory applications due to it's extremely low vacuum capabilites. DuoSeal Vacuum Pumps are known for their ruggedness world-wide. These pumps have large oil reservoirs to dilute contaminants. Low pump rpm to reduce friction and wear while minimizing reservoir temperature to lessen chemical reactivity. Pump can be ordered with an optional exhaust filter to control oil mist. Key Features: High contamination tolerance Ultimate vacuum <0.001 Torr Low RPM for long service life Specifications: Applications: Vacuum Manifolds, Schlenk Lines, High boiling point evaporations, Glove boxes, General laboratory use Type: Belt-Drive Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz: 0.9(25) Ultimate Pressure: 1 x 10-4(0.00013) Pump RPM: 580 Oil Capacity: 0.62(0.59) Motor Horespower (watts): 1/3(250) Adjustable Vac. / Gas Ballast: Yes Tubing Needed: 7/16(11) Intake Thread: 3/4-20 Exhaust Thread: 3/4-20 Overall Dimensions LxWxH in. (cm): 17.8x9x12.6 (45.1x32.1x31.8) Ship Weight: 70(31.8) Shipping Carton Dimensions: LxWxH in. (cm): 20.5x13.8x14.5 (52.1x35.1x36.8)  

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Welch-L Pump 2581 ***Note: This item has a possible 1-2 week lead time depending on stock availability.*** Product Details Economical Oil Free Adjustable Vacuum   Reliable WOB-L Piston pump is perfect for many common laboratory vacuum applications. Features: Vacuum to 5 Torr (29.8"Hg). Includes Vacuum Regulator and Gauge - simple to adjust and monitor vacuum level. Inlet Water Trap - float ball rises to seal off pump from accidental ingestion of water. Muffler quiets pump and filters discharge air. For use with dry or aqueous vapor applications only.     Specifications Model 2581 Free Air Displacement @ 60 Hz, cfm (L/min) 3.5 (100) Ultimate Pressure, torr 5 Motor Power, HP (kW) at 60 Hz 1/3 (0.25) Inlet (Exhaust) Connection Thread NPT 3/8 Tubing Needed, I.D. in. (mm) 1/4 (7) Weight, lbs (kg) 24.5 (11.1) Dimensions, LxWxH, in (mm) 17x7.5x12 (430x420x190) 115V Order Number 2581B-50 / 2581B-24

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***Note: This item has a possible 1-2 week lead time depending on stock availability*** The Welch .9cfm DryFast 2 Head Diaphragm vacuum pump is an ideal pump for 2L and 5L rotary evaporators and vacuum assited filtration. With built in vacuum control via Advanced Vapor Management (AVM), this pump is highly chemical resistance giving you excellent lifespan and vacuum control. Oil-Free, portable, and chemical resistance, this 2 head diaphragm design simplifies pump mantienance. Econimcal and long lasting, these pumps are perfect for any tough lab application. Key Features: Chemical Resistant Oil-Free Tuneable vacuum Specifications: Applications: Rotary Evaporation/Distillation (medium volatility solvents <110oC B.P., volume ~ 1 liter), Vacuum ovens - small, pumping harsh vapors & gases Type: Diaphragm vacuum pump Free Air Displacement cfm (l/min.) @60Hz: 0.9(25) Ultimate Pressure: 9(12) Maximum Vacuum: 29.6 Motor Horsepower (watts): 1/5(150) Adjustable Vac. / Gas Ballast: Yes Tubing Needed: 1/4(7) Intake Thread: M14(1/8) Overall Dimensions LxWxH in. (cm): 13.8x6.8x8.8 (35.2x7.2x22.3) Ship weight: 25 Shipping Carton Dimensions LxWxH in. (cm): 21x14x15 (52x35x37) Adjustable vacuum: knob style

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 Welch WOB-L Pump 2561 ***Note: This item has a possible lead time of 2-3 weeks depending on stock availability.*** Reliable WOB-L Piston pump is perfect for many common laboratory vacuum applications. Features: Vacuum to 5 Torr (29.8"Hg). Includes Vacuum Regulator and Gauge - simple to adjust and monitor vacuum level. Inlet Water Trap - float ball rises to seal off pump from accidental ingestion of water. Muffler quiets pump and filters discharge air. For use with dry or aqueous vapor applications only. Features: Economical Oil Free Adjustable Vacuum Applications: Vacuum Filtration Many filtrations require only minimal vacuum to proceed; deep vacuum is not required. Vacuum pump flow required is roughly proportional to the total surface area of filters being used. Filtration of particulate-clogging samples can be improved somewhat with deeper vacuum, but a combination of larger filter surface area, smaller samples, and sequential use of decreasing porosity filter papers may also be required for timely filtration. Choose a standard duty vacuum pump for aqueous vapors; use a PTFE pump for resistance to harsh chemicals.  Specifications: Applications Vacuum filtration up to 6 funnel manifold; Lab automation - aspiration of systems utilizing 96 / 256 well format; Welchnet lab installations up to 10 outlet fixtures (geneneral use, filtration) Type Laboratory Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz 3.5(100) Free Air Displacement m3/hr (l/min.) @50Hz 4.9(83) Ultimate Pressure 60(80) Maximum Vacuum 27.6 Max Pressure PSIG (pascal) Motor Horsepower (watts) 1/3(250) Adjustable Vac. / Gas Ballast Yes Tubing Needed 1/4(7) Intake Thread NPT 1/4 Overall Dimensions LxWxH in. (cm) 15.0x10x10 (38.1x25.4x25.4) Ship Weight 24(10.9) Shipping Carton Dimensions LxWxH in. (cm) 21x12x15 (53x30x38) Intake Catch Jar Yes Adjustable Vacuum Knob Vacuum Gauge Dial

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DryFast Collegiate Diaphragm Pump 2014 ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details Chemical Resistant Oil-Free Tuneable Vacuum   Welch DryFastTM PTFE Diaphragm Vacuum Pumps enable precise vacuum control for organic evaporations with exclusive Advanced Vapor Management (AVM). Oil-Free, portable, chemical resistant, 1 head diaphragm design simplifies maintenance. Choose from seven dry PTFE vacuum pump models with flows up to 70 L / min and adjustable vacuum down to 2 Torr. Economical DryFastTM vacuum pumps are perfect for tough lab applications.     Model Number 2014 Applications Vacuum Filtration, SPE, Rotary Evaporations (volatile solvents <80oC B.P., volume <2 liters), pumping harsh vapors & gases, general laboratory vacuum Type Laboratory Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz 1.2(35) Free Air Displacement m3/hr (l/min.) @50Hz 1.75(29) Ultimate Pressure 40(53) Maximum Vacuum 28.3 Motor Horsepower (watts) 1/5(150) Adjustable Vac. / Gas Ballast Yes Tubing Needed 1/4(7) Intake Thread NPT M14(1/8) Overall Dimensions LxWxH in. (cm) 12x7.0x8.3 (30.5x 17.8x21.1) Ship Weight 19(8.6) Shipping Carton Dimensions LxWxH in. (cm) 21x14x15 (52x35x37) Adjustable Vacuum Knob

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Welch BTpro40              (CSA) Certified      ***Note: This item has a possible lead time of 2-3 weeks depending on stock availability.***        Welch’s BTpro vacuum pump series has a flow and vacuum level to provide fast performance for your size of rotary evaporator, glass reactor, purge oven, or winterization filtration apparatus. These chemical duty PTFE diaphragm pumps are oil-free. The pumping action and deep vacuum comes from the movement of PTFE diaphragms within PTFE heads. All wetted services in the flow path are made of fluoroplastic making the BTpro pump highly chemically resistant. As a result, the BTpro vacuum pump series is near-zero maintenance. A cold trap placed in-line with BTpro pump is needed if terpenes are part of the flow path. The BTpro40 and BTpro70 models employ patented valve and diaphragm technology that generates a deep 15 Torr vacuum pressure with each PTFE head. In addition, both pump models have built-in tuneable vacuum to control evaporation rate. The tunable vacuum adjustment can also be used to stop accidental bumping/foaming. Model BTpro40 Free Air Displacement@60Hz,lpm(CFM) 40(1.4) Ultimate Vacuum Pressure, Torr 15 Maximum Vacuum, in. Hg 29.3 Horsepower, HP (watts) 1/5(150) Built-in adjustable vacuum Yes Gas Ballast - Head Material PTFE Diaphragm PTFE Inlet/outlet Connection 3/8” barb Agency (National Recognized Lab) CSA Weight, lbs (kg) 15.0(6.8) Overall DimensionsLxWxH in.(cm) 12x7x8.3(31x18x22) Shipping Weight, lbs(kg) 19(8.6) Shipping Carton DimensionsLxWxH in.(cm) 21x14x15(52x35x37)

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Welch WOB-L System 2511 ***Note: This item has a possible 1-2 week lead time depending on stock availability***   Product Details Use this easy system to collect waste into 1.2 Liter autoclaveable collection receiver. Includes vacuum measurement and regulation. Reservoirs are protected from overflow by float valve; inlet line hydrophobic filter further protects pump. Vacuum Pump is reliable WOB-L piston pump, perfect for aqueous vapors, buffer, and mild bleach solutions . Not for use with organic solvents / acids / bases.   Model Number 2511 Applications Solution aspiration / collection; vacuum filtra Type Laboratory Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz 0.39(11) Free Air Displacement m3/hr (l/min.) @50Hz 0.55(9.2) Ultimate Pressure 219(292) Maximum Vacuum 21.3 Max Pressure PSIG (pascal) 33(3.3 x 105) Motor Horsepower (watts) 1/30(25) Tubing Needed 3/16(5) Intake Thread NPT 3/16 in. Hose Overall Dimensions LxWxH in. (cm) 7.6x4.5x7.5 (19.4x11.4x19.1) Ship Weight 11.0(5) Shipping Dimensions LxWxH in. (cm) 11" x 7" x 7"  (39x31x32)

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Welch 2019 Diaphragm Pump - vacuum filtration ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Product Details PTFE Contact Surfaces Light and Portable  Economical Model 2019 diaphragm vacuum pump is durable and chemical resistant. Use Model 2019 for vacuum filtration, desiccation, degassing, and other mid-range vacuum applications. Recommended for operations utilizing organic / aqueous solvents and or light acid / base (e.g. acetic acid) solutions. Ideal for single funnel vacuum filtrations, SPE manifolds, or up to 6 holder manifold filtrations.     Specifications Free Air Displacement, CFM (l/min) 1.3 (37) Ultimate Vacuum, torr (mbar) 150 (200) Max. Vacuum, in Hg 24 Tubing Needed, I.D. in. (mm) 1/4 (7) Weight, lbs 10.2 Overall Dimensions 8.8 x 5 x 8.8 MODEL 2019B-01 / 2019C‐02

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Welch WOB-L Pump 2546 Product Details Economical Oil Free Adjustable Vacuum / Pressure Reliable WOB-L Piston pumps are perfect for many common laboratory vacuum applications. Features: Vacuum and Pressure - to 60 Torr (27.6"Hg). Includes Vacuum and Pressure Regulators and Gauges - simple to adjust and monitor vacuum level and delivery pressure. Inlet Water Trap - float ball rises to seal off pump from accidental ingestion of water. Muffler quiets pump and filters discharge air. For use with dry or aqueous vapor applications only.   Specifications Model Number 2546 Application Filtration (1 to 6 funnels), Aspiration, Desiccation, SPE, Replace water aspirator, Vacuum Drying Type Laboratory Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz 1.6(45) Free Air Displacement m3/hr (l/min.) @50Hz 2.3(38) Ultimate Pressure 60(80) Maximum Vacuum 27.6 Max Pressure PSIG (pascal) 100(106) Motor Horsepower (watts) 1/4(190) Adjustable Vac. / Gas Ballast Yes Tubing Needed 3/16(5) Intake Thread NPT 1/4 Overall Dimensions LxWxH in. (cm) 10x7.5x9 (25.4x19.1x7.7) Ship Weight 17(7.7) Shipping Carton Dimensions LxWxH in. (cm) 15.3x12.3x12.7 (39x31x32) Intake Catch Jar Yes Exhaust Catch Jar Yes Adjustable Vacuum Knob Adjustable Pressure Yes Vacuum Gauge Dial Pressure Gauge Dial

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Welch WOB-L Pump 2522 Product Details Economical Oil Free Adjustable Vacuum / Pressure Reliable WOB-L Piston pumps are perfect for many common laboratory vacuum applications. Features: Vacuum and Pressure - to 100 Torr (26"Hg). Includes Vacuum and Pressure Regulators and Gauges - simple to adjust and monitor vacuum level and delivery pressure. Inlet Water Trap - float ball rises to seal off pump from accidental ingestion of water. Muffler quiets pump and filters discharge air. For use with dry or aqueous vapor applications only.   Specifications Model Number 2522 Application Filtration (1 to 2 funnels), Aspiration, Desiccation, SPE, Replace water aspirator, Vacuum Drying Type Laboratory Vacuum Pump Free Air Displacement cfm (l/min.) @60Hz 0.76(22) Free Air Displacement m3/hr (l/min.) @50Hz 1.1(18) Ultimate Pressure 100(133) Maximum Vacuum 26 Max Pressure PSIG (pascal) 100(106) Motor Horsepower (watts) 1/8(93) Adjustable Vac. / Gas Ballast Yes Tubing Needed 3/16(5) Intake Thread NPT 1/4 Overall Dimensions LxWxH in. (cm) 8.1x8.8x10 (20.6x22.4x25.4) Ship Weight 17(7.7) Shipping Carton Dimensions LxWxH in. (cm) 15.3x12.3x12.7 (39x31x32) Intake Catch Jar Yes Exhaust Catch Jar Yes Adjustable Vacuum Knob Adjustable Pressure Yes Vacuum Gauge Dial Pressure Gauge Dial

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Welch 2052/2054 4 Head Diaphragm Replacement Kit ***Note: This item has a possible 1-2 week lead time depending on stock availability*** Diaphragm pumps require rebuild and seal replacements. 

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Minor Repair Kit for Welch 1400 DuoSeal      This minor repair kit enables refurbishment of DuoSeal pump model 1400. Includes gaskets, seals, valves, o-rings, springs, and mechanical shaft seal. All parts are Welch Original equipment with enhanced chemical resistance. Manufactured to design specifications for top pump durability and performance.  

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Vacuum Filter Trap     This Vacuum Filter Trap is designed to remove potential contaminants from the vacuum line to prolong the lifetime of your pump. Packed with oil-free, stainless-steel SS304 wool and made with a glass jar, the filter trap may optionally be used as a low-cost cold trap. Welch Inlet / Exhaust Separator 1423B with stainless steel wool inside for even more filtration. We built out two separate fitting configurations for your convenience: just choose from the drop-down menu above! The trap ships default with two 3/8" Barbed fittings, but you may alternatively select our KF25 x 1/4" JIC fittings to receive your vacuum trap specially designed for use with our ovens! Simply clamp the trap directly onto your oven's KF25 vacuum port, then connect a 1/4" hose to your vacuum pump. Specifications: Inlet/Outlet: 3/8" FNPT (ships with adapters selected above) Jar: 230ml Glass -- Welch Inlet / Exhaust Separator 1423B Steel Wool: Oil-free SS304 Maximum Vacuum: <29"Hg Dimensions: 2.8" dia x 4.3" tall   Please note this item does not include any vacuum tubing. To order, we recommend the 3/8" Gum Rubber Vacuum Tubing.

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Welch Diaphragm Replacement Kit  Diaphragm pumps require rebuild and seal replacements.    Sku Specifications 2047k-02 Two Head Service Kits for Models: 2032 2042 2047 2522K-01 Service Kit ConRod For 2522B-01 2546K-03 SERVICE KIT 2546B-01/C-01/C-02, 2534C-02, 2522C-05

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***Note: This item has a possible 1-2 week lead time depending on stock availability*** Exhaust filters are the perfect solution for preventing oil mist from spraying in the air, keeping your laboratory clean and free from harmful particles and emission. Please note that this item has a possible 1-2 week lead time depending on stock availability.  Specifications: Filters oil mist from pump exhaust Simple replacement of element Reduces pump noise Filters to 0.3 micron particle size Screw-in type

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Welch Premium Oil - Direct Drive Vacuum Pumps, Liter  Description: Welch Premium Oil - Direct Drive Vacuum Pumps derived from hydrotreated base, made for high performance in vacuum pump operation at elevated temperatures. Welch Premium vacuum pump oil resists breakdown in the high RPM operation environment of direct drive pumps. Enables direct drive pumps to maintain the highest vacuum performance over time. Low vapor pressure Excellent resistance to heat Designed for direct drive vacuum pumps

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Welch DuoSeal Vacuum Pump Oil, Liter 1407K-11 ***Note: This item has a possible 1-2 week lead time depending on stock availability.*** Use this specially fractionated oil for DuoSeal belt-driven pumps to ensure the highest vacuum performance. DuoSeal Oil performs to rigid standards for vapor pressure, vacuum level stability, and viscosity - providing the lubrication that helps enable renowned DuoSeal pump durability.  

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