Welch Duoseal Vacuum Pump 1402

Lubricant For Breast Pumping, Welch 1402 DuoSeal Vacuum Pump, 115V 60Hz 1 PH .. The Welch 1402 DuoSeal Vacuum Pump, 115V 60Hz 1 PH, Model 1402B-01 is a rugged and robust pump for applications requiring pressures < 1 Torr.$3,187.20 · ‎$95.07 3–6 day delivery · ‎30-day returns · ‎In stock Slaughter Grid 2bliss Ready, Product: DUOSEAL 1402B-01. 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 .$3,840.00 · ‎$160 delivery · ‎15-day returns · ‎In stockPeople also askYou will see more English now.What is the life expectancy of a vacuum pump?How often should you rebuild a vacuum pump?What is a Welch vacuum pump used for?What pressure is a Welch vacuum pump?Feedback Lullaby Breast Pump, Product: DUOSEAL 1402W-01. Welch Belt-drive vacuum pumps are known for their ruggedness world-wide in the most demanding applications. Key features making these pumps so reliable and .$5,095.00 · ‎15-day returns Mamamoo Breast Pump, Welch DuoSeal High-Vacuum Pumps Model 1402. Rugged, durable pumps are ideal for demanding applications such as Schlenk drying lines, freeze drying, vacuum distillations, concentrating and degassing.Pump Type: High Vacuum Pump, Two-StageShipping Weight (English): 128 lbMaximum Pressure: 1 x 10-4 torrWeight (Metric): 58 kg$6,310.00 · ‎30-day returns · ‎In stock Mckesson Medical Breast Pump, NEW Welch 1402 DuoSeal Belt Drive Rotary Vane .. The Welch 1402 DuoSeal Belt Drive dual stage rotary vane mechanical vacuum pump offers an excellent ultimate pressure of 1x10-4 Torr. These pumps are commonly .$3,648.00 · ‎In stock Women's Nike Quarter Zip, Welch 1402 DuoSeal Vacuum Pump 115V Model # 1402B- .. Welch 1402 DuoSeal Vacuum Pump 115V Model # 1402B-01 ; Free Air Displacement cfm (l/min.) @60Hz, 5.6 (160) ; Ultimate Pressure, 1 x 10-4 (0.00013) ; Pump RPM, 525.$3,187.20 · ‎30-day returns Slds-grid, Welch 1402 Vacuum Pump. The Welch 1402 vacuum pump is a two-stage belt-drive rotary vane pump with a free air displacement of 5.6 cfm and a ultimate total pressure of 1 x 10-4 Torr . Medela Lactina Select Breast Pump, Sargent Welch Model 1402 vacuum pump. Sargent Welch Model 1402 DuoSeal High-Vacuum Pump. 160 L/min ( 5.6 cfm ). 1/2 hp. 115 VAC Shipping weight: 128 lbs. ( truck ship ).$800.00 · ‎In stock Medela Pump In Style Advanced Breast Pump Starter Kit, Reconditioned Welch 1402 pump.. Product Description. Reconditioned Welch 1402 pump. Complete with Pump, Base, Guard, and Motor. 5.6 CFM. 115v 1/2 HP motor. These pumps are well known for .$2,250.00 · ‎In stock Medela Pump In Style Advanced Breast Pump With Metro Bag, Welch Vacuum 1402 Duoseal Unmounted Pump. Shop Amazon for Welch Vacuum 1402 Duoseal Unmounted Pump and find millions of items, delivered faster than ever.$2,941 (typically $3,349) Medicaid Breast Pump Indiana, Welch DuoSeal. Welch DuoSeal. DuoSeal Vacuum Pumps are the vacuum pumps of choice for large chiller service. These HVAC vacuum pumps have . Welch DuoSeal 1402, EA, 115V.$3,648.00 to $7,286.50 · ‎$800 2–7 day delivery · ‎30-day returns · ‎In stock Medline Breast Pump Order Form, DUOSEAL, PUMP 115/60 1PH-1402B-01 - WELCH. Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH-$3,840.00 · ‎In stock Medline Industries Breast Pump Reviews, Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH. Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH- table.configurations-table { border: 2px . DuoSeal Vacuum Pumps are known for their ruggedness world-wide.$3,840.00 · ‎In stock Medline Industries Inc Breast Pump, Welch 1402 DuoSeal Belt Drive Pump, Rebuilt. Welch 1402 DuoSeal Belt Drive Pump Rebuilt, New, Refurbished, Used, Repair. . servicing • degassing • distillation • concentration • vacuum drying .$1,920.00 · ‎Out of stock Milk Mom Breast Pump, DUOSEAL,PUMP 115/60 1PH EXP PRF MOTOR. Welch DuoSeal 1402 - DUOSEAL,PUMP 115/60 1PH EXP PRF MOTOR-$5,095.00 · ‎In stock Minuet Lcd Breast Pump, Welch 1402 DuoSeal Belt-Driven Rotary Vane Vacuum .. The Welch 1402 DuoSeal Belt Drive dual stage rotary vane mechanical vacuum pump offers an excellent ultimate pressure of 1x10-4 Torr. These pumps are commonly .$1,600.00 · ‎Out of stock Mn Medical Assistance Breast Pump, owner's manual for duoseal® vacuum pumps models: .. PDFDUOSEAL® VACUUM PUMPS. MODELS: 1400, 1405, 1402,. 1376, 1397, 1374,. 1399, 1380, 1392. Gardner Denver Welch Vacuum Technology, Inc.40 pagesWelch 1402 Vacuum Pump-Reconditioned$2,250.00Pre-ownedvacuumpumpsupply.comWelch 1402 Vacuum Pump-Reconditioned$2,250.00Pre-ownedvacuumpumpsupply.comWelch Vacuum 1402B-01 DuoSeal Belt-Drive Vacuum Pump, 160 LPM, 115V$3,959.32Amazon.comWelch Vacuum 1402B-01 DuoSeal Belt-Drive Vacuum Pump, 160 LPM, 115V$3,959.32Amazon.comWelch 1402 Duoseal Belt-driven Rotary Vane Vacuum Pump 115/230v Very$999.00Pre-ownedeBay - jona.kitcWelch 1402 Duoseal Belt-driven Rotary Vane Vacuum Pump 115/230v Very$999.00Pre-ownedeBay - jona.kitcWelch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH$3,840.00usawelch.comWelch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH$3,840.00usawelch.comWelch Scientific Duo Seal Vacuum Pump Model 1402 W/ GE 5KC42JG14E Motor$800.00Pre-ownedeBayWelch Scientific Duo Seal Vacuum Pump Model 1402 W/ GE 5KC42JG14E Motor$800.00Pre-ownedeBayWelch DuoSeal 1402 | 115V 60Hz 1 PH | Belt-Drive Vacuum Pump$3,840.00Welch VacuumWelch DuoSeal 1402 | 115V 60Hz 1 PH | Belt-Drive Vacuum Pump$3,840.00Welch VacuumWelch 1402 Duo Seal Vacuum Pump Working$399.99Pre-ownedeBay - buyhitekWelch 1402 Duo Seal Vacuum Pump Working$399.99Pre-ownedeBay - buyhitekWelch 1402B-46 Hi Vacuum Pump 4.6CFM 115v 60Hz$4,090.00Amazon.comWelch 1402B-46 Hi Vacuum Pump 4.6CFM 115v 60Hz$4,090.00Amazon.com Mo Healthnet Breast Pump, 1402 Welch Vacuum DUOSEAL Unmounted Pump, 5.6 CFM. BEST PRICE on the 1402 Welch Vacuum DUOSEAL Unmounted Pump, 5.6 CFM from VacuumWorld.com.$3,260.00 Mommy Xpress Breast Pumps, Welch Belt-Driven Vacuum Pump DuoSeal 1402 R. We'll be happy to assist you as soon as possible. The warranty.$399.00 · ‎In stock Momyeasy Breast Pump, OWNER'S MANUAL FOR DUOSEAL® VACUUM PUMPS .. PDFIf you are required to communicate with your dealer or with Welch Vacuum be sure to include your order numbers for quick identification. Do not return the pump . Neb Doctors Breast Pump, DuoSeal 1402 Welch Vacuum Pump. 1402 Vacuum Pump Specifications . Dual Seal 160 Liters/Min., 5.8 Cu.Ft/Min., 1/2 hp., 120 volt. An oil vacuum pump for distillation offers a multitude of .$699.00 · ‎$35 delivery · ‎In stock Smart Grid Investment Matching Grant Program, Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH. Home > Welch Vacuum > Belt-Drive Rotary Vane Vacuum Pumps > 1402B-01. Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH. SMC. Part Number 1402B-01 .$3,840.00 · ‎30-day returns Northwood Inc Breast Pump, NEW Welch 1402 DuoSeal Belt Drive Rotary Vane .. Buy the NEW, Welch, 1402, DuoSeal, Belt, Drive, Rotary, Vane, Mechanical, Vacuum, Pump, 1402B-01, here.$3,648.00 Ovia Free Breast Pump, 1402B-01 DuoSeal Vacuum Pump. These Welch DuoSeal belt drive vacuum pumps offer an excellent ultimate pressure . Welch 1402B-01 DuoSeal Vacuum Pump. $3,840.00 Excl. tax. Brand: Welch.$3,840.00 · ‎30-day returns Pacificsource Breast Pump, Welch 1402 DuoSeal Belt Drive Vacuum Pump w/Motor. Welch 1402 DuoSeal Belt Drive Vacuum Pump w/Motor Vacuum Equipment Vacuum Pumps Vacuum Pumps.$500.00 Pacificsource Breast Pump Coverage, Welch 1402 DUOSEAL Rotary Vane Pump, Gas Ballast On .. Fully Refurbished Welch 1402 DUOSEAL Rotary Vane Vacuum Pump, Gas Ballast On Top, 115/230V, 60 Hz, Single Phase.$1,699.50 Pediatric Products Breast Pump, Welch Belt Driven Vacuum Pump DuoSeal 1402B - NEW. DuoSeal 1402B Belt Driven Vacuum Pumps has large oil reservoirs to dilute contaminants and can be ordered with an optional . Welch DuoSeal 1402B - NEW.$3,665.00 Snap Grid Unity, Buy Welch DuoSeal For Sale, New & Used Prices - LabX. Items 1 - 14 of 14 — Welch 1402 DuoSeal Vacuum Pump 115V Model # 1402B-01. Price: $3,187.20. Condition: New. Welch 1402 DuoSeal Belt Drive Pump. Providence Health Plan Breast Pump, Welch 1402 Pump - Trillium – Vacuum Systems. The Welch 1402 DuoSeal dual stage rotary vane pump is a rugged, time tested workhorse used in a number of vacuum related industries and applications.Pumping Speed: 5.6 cfmWeight: 132 lbsInlet/Outlet Size: 1″ NPTOil Capacity: 2.25 Qts Providence Insurance Breast Pump, Welch 1402 Vacuum Pump. DuoSeal Vacuum Pumps are known for their ruggedness world-wide. These rotary vane pumps have large oil reservoirs to dilute contaminants. Low pump rpm to . Publix Breast Pump, Welch 1402 Vacuum Pump - 2022 Unused. Welch 1402 Vacuum Pump. The Welch 1402 DuoSeal is a belt-drive vacuum pump ideal for large chillers, glove boxes, rotary evaporators, and vacuum ovens, . Pump Up Breast Implants, Welch DuoSeal 1402 - DRC. DuoSeal Vacuum Pumps are known for their ruggedness world-wide. These rotary vane pumps have large oil reservoirs to dilute contaminants. Low pump rpm to . Quartz Insurance Breast Pump Coverage, Used Welch 1402 Vacuum Pump for sale. Manufacturer: Welch; Model: 1402. QTY. 1. WELCH DUO-SEAL VACUUM PUMP BALSTON FILTER TYPE 18/18-371 H GE MOTOR 60HZ PHASE:1 V:115-230. Click to Request Price . Quiet Portable Breast Pump, Welch DuoSeal 1402 - Vacuum Pumps refurbished. Welch DuoSeal 1402. Welch DuoSeal 1402 Welch 1402 Duoseal Belt Drive Rotary Vane Is A Durable Vacuum Pump With. Manufacturer : Welch.$9.35 delivery Snap To Grid Excel, Welch 1402 DuoSeal Belt-Driven Rotary Vane Vacuum .. The unit was removed from an operating environment and is in good physical condition. The unit has also been tested in our facility and found to be in good .$1,600.00 Refurbished Breast Pump, 1402 PUMP (WELCH) PARTS. 1402 PUMP (WELCH). ShopWelch Vacuum Pump PartsDuoSeal Series1402 PUMP (WELCH). Showing all 6 results. Default sorting, Sort by popularity, Sort by latest .Free delivery over $100 · ‎30-day returns Register My Medela Breast Pump, 1402B-80 Welch Vacuum 1402B-80 Duoseal Pump, 115V .. 1402B-80 Welch Vacuum 1402B-80 Duoseal Pump, 115V, 60 Hz, 1pH, CSA . Please allow 7 to 10 weeks for delivery. Available to Ship Today*:; Available to .$4,075.00 · ‎30-day returns Rx For Breast Pump, Welch 1402 Duo-Seal 160 liter/minute 2-stage vacuum pump. Find Welch 1402 Duo-Seal 160 liter/minute 2-stage vacuum pump, Surplus Store at RecycledGoods.com | Ventura California | (888) 488-6550 Call Toll Free.$500.00 · ‎30-day returns Sharing Breast Pump, Welch, Model 1402. Model 1402 Series — 160 L/min. (5.6 cfm) Free Air Displacement, Unmounted Pump - Welch DUOSEAL Belt-Drive Vacuum Pumps, Two Stage, Model 1402, Each .$4,015.11 · ‎Free delivery over $49 Simply Healthcare Breast Pump, Welch Scientific 1402 DuoSeal Belt Drive Rotary Vane Pump. 1402 Welch Scientific 1402 DuoSeal Belt Drive Rotary Vane Pump from Welch Scientific | Buy Today from Artisan. Fast Quotes & Shipping. Work with our experts .30-day returns Solar Grids Franchise Reviews, Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH. Welch DuoSeal 1402 - DUOSEAL, PUMP 115/60 1PH-$3,840.00 Simply Healthcare Free Breast Pump, Gardner Denver Welch Vacuum Pumps, Two-stage Belt- .. Combining top-notch and uncompromising quality with an affordable price, the Vacuum Pumps, Two-Stage Belt-Drive, DUOSEAL Series, Welch Vacuum Pump 1402B-01 .$6,059.00 · ‎30-day returns Spectra Breast Pump Usa, Welch 1402 DuoSeal Belt Drive Rotary Vane Mechanical .. Scientific Vacuum > Products > Vacuum Pumps > Rotary Vane Vacuum Pumps > Welch 1402 DuoSeal Belt Drive Rotary Vane Mechanical Vacuum Pump. Spectra S1 Breast Pump With Bag, Welch Ilmvac 1402 6D735 Duoseal Vacuum Pump .. Jun 12, 2022 — Welch Ilmvac 1402 6D735 Duoseal Vacuum Pump Owner's Instruction Manual.Free delivery Spectra S1 Plus Breast Pump Bag, WELCH 1402 DuoSeal Belt Drive Pump | 385520. WELCH 1402 DuoSeal Belt Drive Pump from Bid On Equipment. BOE offers an extensive inventory of competitively priced Vacuum Pumps.$1,500.00 Solve-it Grid, sargent-welch duoseal vacuum pump 1402 2.1 cfm (nos) - .. SARGENT-WELCH DUOSEAL VACUUM PUMP 1402 2.1 CFM (NOS)$1,100.00 Spectra S2 Plus Breast Pump Vs S1, Welch 1402 Vacuum Pump | REBUILT w/ 1 Year Warranty. Welch Vacuum Pump 1402 go through a final test and certificate is provided. All Welch Vacuum Pumps come with a one-year warranty.$2,035.00 · ‎$158.38 2–9 day delivery · ‎30-day returns · ‎In stock Superior Health Plan Free Breast Pump, Welch 1402W-01 DuoSeal, 5.6 m3/hr 1 Phase Two-Stage .. Welch 1402W-01 DuoSeal, 5.6 m3/hr 1 Phase Two-Stage Vacuum Pump with Explosion Proof . DuoSeal Vacuum Pumps are known for their ruggedness world-wide.Type: Belt-Drive Vacuum PumpMotor Horsepower (watts): 1/2 (370)Applications: Vacuum Ovens, Glove Boxes, Ge.Oil Capacity: 2.25 (2.1)$4,245.00 · ‎14-day returns · ‎In stock Timberlake Breast Pump, Welch® DuoSeal Belt-Drive Vacuum Pumps. SKUDescriptionUltimate PressureFree Air Displac.1400B‑01DuoSeal Belt Drive Vacuum Pump1 x 10‑4 Torr (0.00013 mbar)0.9 cfm (25 L/mi.1399B‑01DuoSeal Belt Drive Vacuum Pump1.5 x 10‑2 Torr (0.019 mbar)1.2 cfm (35 L/mi.1405B‑01DuoSeal Belt Drive Vacuum Pump1 x 10‑4 Torr (0.00013 mbar)3.2 cfm (90 L/mi.View 4 more rows Transgender Breast Pump, Images for welch duoseal vacuum pump 1402. Vacuum Pump Welch Duo-Seal 1402 Laboratory ; SKU: BZ10146903 ; Condition: Used ; Availability: Usually Ships in 24 to 48 Hours ; Shipping: $225.00 (Fixed Shipping .$997.98 · ‎30-day returns Tubing Breast Pump, Major Repair Kit with Cast Iron Vanes & Lip Seal, Welch .. Part NumberDescriptionQuantityQty in stock410234Gasket136410403Case Gasket, Foam Rubber161410508Thrust Washer1139View 18 more rows Udderly Breast Pump, Welch 1402 DuoSeal Rotary Vane Mechanical Vacuum .. Welch 1402 DuoSeal Rotary Vane Mechanical Vacuum Pump Rebuilt. These pumps are commonly used for the following: Vacuum furnace evacuation; Backing . Women's Nike Terrascape, Welch Vacuum 1402 Duoseal Belt Drive User Manual. OWNER'S MANUAL FOR. DUOSEAL® VACUUM PUMP MODELS: 1402B-01 & 3Z655. WARNING. Never block the Exhaust Port. If the exhaust port is blocked, pressure will . Unimom Opera Breast Pump Vs Spectra, Welch Allyn 1402 Laboratory Vacuum Pump. The Welch 1402 DuoSeal Belt Drive dual stage rotary vane mechanical vacuum pump offers an excellent ultimate pressure of 1x10-4 Torr. These pumps are commonly . Us Family Health Plan Breast Pump, DUOSEAL® Belt-Drive Vacuum Pumps, Two Stage, Welch. 2.1 L (2.25 qts.) 525, 58.1 kg (128 lbs.) 1402B-01, 54976-029 .$2,917.93 Usb Breast Pump, Welch 1402 Duo Seal Vacuum Pump with 3/4 HP Dayton .. Don't miss your chance to bid on Welch 1402 Duo Seal Vacuum Pump with 3/4 HP Dayton Motor Lot #15553.00 from Global Machine Brokers on the Aucto Marketplace .$100.00 Verio Breast Pump, Welch 1402 trouble. - Fusor Forums. A 1402 pump will get warm during operation, as will any vacuum pump--most of the . The Welch Duo-Seal pumps have a large region between the intake and .13 posts  ·  This weekend I finally hooked everything up vacuum wise, and a small 3kV transformer and .VideosYou will see more English now.6:30Welch DuoSeal 1402 Shaft Seal ReplacementYouTube · NeonPreservation6 minutes, 30 secondsSep 4, 20202:58Oil Change Tutorial, Welch DuoSeal 1402 Vacuum PumpYouTube · James Bruno2 minutes, 58 secondsJan 27, 20193 key moments in this videoFeedbackView all Verio Healthcare Breast Pump, Welch 1402 advice Please - PolyTech Forum. . curt lesker and company Tv-019 I want as good a vacuum as I can get without recking the pump, but I am not sure I want to pay Welch Duo seal oil prices. Steve Woerner National Grid, Used WELCH 1402 for Sale - $500 item# 1641965. Sep 30, 2020 — Buy Used WELCH 1402 for $500 at Bimedis.com. Search over 350000 listings to find the best local . WELCH DUO SEAL VACUUM PUMP MODEL 1402.$500.00NEW Welch 1402 DuoSeal Belt Drive Rotary Vane Mechanical Vacuum Pump 1402B-01$3,648.00Ideal VacuumNEW Welch 1402 DuoSeal Belt Drive Rotary Vane Mechanical Vacuum Pump 1402B-01$3,648.00Ideal VacuumDuoSeal 1402 Welch Vacuum Pump$699.00Pre-ownedHiTechTrader.comDuoSeal 1402 Welch Vacuum Pump$699.00Pre-ownedHiTechTrader.comWelch 1402 DuoSeal Belt-Driven Rotary Vane Vacuum Pump 115/230V$1,080.00Pre-ownedeBayWelch 1402 DuoSeal Belt-Driven Rotary Vane Vacuum Pump 115/230V$1,080.00Pre-ownedeBayWelch Belt-driven Vacuum Pump Duoseal 1402 R$399.00Pre-ownedeBay - jenne_sparkWelch Belt-driven Vacuum Pump Duoseal 1402 R$399.00Pre-ownedeBay - jenne_sparkWelch Duo-Seal Vacuum Pump 1402 and Dayton Motor-Parts Only-as is$499.99Pre-ownedeBayWelch Duo-Seal Vacuum Pump 1402 and Dayton Motor-Parts Only-as is$499.99Pre-ownedeBayWelch Duoseal 1402 Vacuum Pump 1402B-01 Gardner Denver Thomas 1/2HP 1725 RPM$1,799.99Pre-ownedeBayWelch Duoseal 1402 Vacuum Pump 1402B-01 Gardner Denver Thomas 1/2HP 1725 RPM$1,799.99Pre-ownedeBayWelch 1402 Duo Seal Vacuum Pump, 2 Stage, Rotary Vane – TESTED 4 mTorr, w/oil$900.00Pre-ownedeBayWelch 1402 Duo Seal Vacuum Pump, 2 Stage, Rotary Vane – TESTED 4 mTorr, w/oil$900.00Pre-ownedeBayWelch DuoSeal 1402 Belt-Drive Vacuum Pump, 5.6 CFM, 0.001 Torr Max, 1/2 W, 1400B-01$3,648.00The Lab DepotWelch DuoSeal 1402 Belt-Drive Vacuum Pump, 5.6 CFM, 0.001 Torr Max, 1/2 W, 1400B-01$3,648.00The Lab Depot Whisper Breast Pump, Welch “Duo-Seal” Vacuum Pumps, 1/2 Hp. 1-Used welch “duo seal” model 1402 vacuum pump, serial number 122882. Driven by 1/2 hp single phase, 115-230 volt motor. 1 2 Booster Pump, Non Distillation Uses for Old Vacuum Pump - Think Tank. May 11, 2022 — Item Model/Manufacturer: Welch Description: 1402 Duo Seal Price/MSRP: $1000 obo/ $2-3000 Current location of item: SW Washington Estimated . Strengthsfinder Team Grid, Tritium Control Technology. P. H. Lamberger · 1973 · ‎Government publicationsOne Rotary vane , oil seal vacuum pumps , such as the Welch Duo Seal model 1402B contaminated with small amounts of HTO ( 0.11.0 g ) and left operating . 3 4 Hp Pool Booster Pump, NBS Laboratory Equipment - Page 305 - Google Books Result. United States. National Bureau of Standards · 1974 · ‎Government publicationsMANUFACTURER LARS ) VACUUM PUMP - CONTINUED 182070 E.H. SARGENT & COMPANY . 707 0973 222 B157 316.00 181451 WELCH SCIENTIFIC COMPANY 1402B 12532-2 327 . 3 Phase Booster Pump, A Consumers Guide to Instructional Scientific Equipment. National Science Foundation (U.S.). Office of Experimental Projects and Programs · 1975 · ‎LaboratoriesVACUUM PUMP , 13152 Fred T. Johnson , Eastern Michigan Univ . . cell ( sr . , graduate ) VACUUM PUMPS , DUO - SEAL , 1402 B Welch James C. Lombardi . 3hp Booster Pump, WASH - Page 216 - Google Books Result. 1973One additional topic , contaminated vacuum pumps , merits some discussion . Rotary vane , oil seal vacuum pumps , such as the Welch Duo Seal model 1402B .