Diaphragm Vacuum Pumps (Oil-Free)

Diaphragm vacuum pumps are a highly popular subset of laboratory pumps. With their oil-free design and cost-effective construction, diaphragm pumps are manufactured in an array of styles and with a bevy of optional features, including multiple pump stages, solvent recovery, and desired free air displacement.

Despite the many choices available, all diaphragm pumps share a few key benefits: they're low-hassle units (thanks to their oil-free design), they're chemically resistant (thanks to insulated PTFE components), and they're versatile across a wide range of pressures and temperatures.

Used often for chemical duty -- especially rotary evaporation -- diaphragm pumps are available from several well-regarded brands, including Welch, VacuuBrand, and Pilot.

Pilot 3000 Diaphragm Vacuum Pump (Economical, Chemical-Resistant)
-7%
The PILOT3000 Chemical Duty Vacuum pump is constructed from quality parts, manufactured in the USA and offered at an affordable price. This laboratory vacuum pump is library-quiet - the noise level is only ~ 54 dB. The PILOT3000 small, durable, and chemical resistant! The PILOT3000 is nearly maintenance-free because of...
From $448.00 From $483.28
Pilot 5000 Diaphragm Vacuum Pump (Economical, Chemical-Resistant)
-10%
Model PILOT5000 and PILOT5000C-02 diaphragm vacuum pumps are durable and chemical resistant. All contact surfaces are PTFE coated. They feature with a liquid inlet trap and vacuum regulator, making them a perfect choice for vacuum filtration, desiccation, and other mid-range vacuum applications. The TLD5000 and TLD5000C-02 are also bleach resistant,...
From $716.87 From $796.52
Manufactured and imported directly from Japan, ULVAC DTC series diaphragm pumps feature integral forced-air cooling. They have two-stage PTFE diaphragms that are ideal for pumping corrosive gases and organic solvents. These pumps are oil-free, portable, and chemical-resistant, which means less maintenance and no more frequent and costly oil change, or...
From $1,778.00
Compact, lightweight, manufactured and imported directly from Japan, ULVAC UDP-6 is a high capacity full chemical-resistant 2-head pump that creates deep vacuum by reciprocate movement of rubber diaphragms. These pumps are oil-free, which means less maintenance and no more frequent and costly oil change, or cross contamination. UL/CSA listed. Applications...
From $4,135.00
VacuuBrand Chemistry-HYBRID Pump
-6%
From $7,668.80 $7,189.00
The RC 6 chemistry-HYBRID Vacuum Pump combines rotary vane and diaphragm vacuum pump technology to support applications in the fine vacuum range with dramatically reduced service demands. In the RC 6, a chemistry-design diaphragm pump is used to back the rotary vane pump. This arrangement keeps the pump oil under...
From $7,189.00 From $7,668.80
VacuuBrand Manual Control Pumps
-6%
From $3,065.80 $2,874.00
VACUUBRAND® Oil-free Chemistry-design Vacuum Pumps are available with manual flow control to provide the most basic management of vacuum where electronic control is unnecessary to achieve good results. Centrifugal concentration, gel drying, and even simple rotary evaporation applications can often be effectively managed with manual control systems. Excellent corrosion resistance...
From $2,874.00 From $3,065.80
VacuuBrand MD 1C +AK+EK Oil-Free Vacuum System with Solvent Recovery
-6%
This chemistry vacuum system has a wide range of applications like evacuation, evaporation and pumping of gases and vapors. This system is usable for increased vacuum requirements with high boiling solvents and often replaces rotary vane pumps. Typical applications are rotary evaporators and vacuum drying ovens. The separator at the...
From $5,509.00 From $5,876.40
VacuuBrand MD 1C Chemistry Diaphragm Pump
-6%
Three-stage chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors and meet high requirements regarding ultimate vacuum. The three-stage construction provides the advantageous combination of high pumping speed and deep ultimate vacuum in a pump with a very small footprint. All parts in...
From $3,470.00 From $3,702.00
VacuuBrand MD 4C NT +2AK Oil-Free Vacuum System with Solvent Recovery
-6%
This chemistry vacuum system has a wide range of applications like evacuation, evaporation and pumping of gases and vapors in chemical, biological and pharmaceutical laboratories that do not require condensation of solvent vapors at the outlet. This system is well proven for high vacuum requirements with high boiling solvents. Typical...
From $7,720.00 From $8,235.20
VacuuBrand MD 4C NT +AK+EK Oil-Free Vacuum System with Solvent Recovery
-6%
This chemistry vacuum system has a wide range of applications like evacuation, evaporation and pumping of gases and vapors in chemical, biological and pharmaceutical laboratories. This system is ideal for high vacuum requirements with high boiling solvents. Typical applications are rotary evaporators and drying ovens. The separator at the inlet...
From $7,616.00 From $8,123.80
VacuuBrand MD 4C NT Chemistry Diaphragm Pump
-6%
Three-stage chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors and meet even challenging requirements. The three-stage design provides the advantageous combination of high pumping speed and very low ultimate vacuum. All parts of the MD 4C NT in contact with pumped media...
From $6,461.00 From $6,892.60
VacuuBrand ME 1C Chemistry Diaphragm Pump
-6%
Vacuum filtration is one of the most common applications used for sample preparation in chemistry, microbiology, waste water control and other analytical processes. The ME 1C diaphragm pump offers a compact, high performance and easy-to-use solution which is perfect for single filtrations. This development, based on the highly successful technology...
From $1,063.00 From $1,134.60
VacuuBrand ME 2C NT Chemistry Diaphragm Pump
-6%
One-stage diaphragm pumps are an excellent solution for continuous, oil-free pumping of gases and vapors at low vacuum requirement. In contrast to waterjet pumps they do not consume water and therefore do not produce any contaminated waste water in daily use. Typical applications are vacuum ovens, filtrations and multi-port manifolds...
From $1,944.00 From $2,074.40
VacuuBrand ME 4C NT Chemistry Diaphragm Pump
-6%
Chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors. The one-stage construction provides the advantageous combination of high pumping speed and low ultimate vacuum down to 70 mbar. All major parts in contact with pumped media are made of chemically resistant fluoroplastics. Well-proven...
From $2,873.00 From $3,064.80
VacuuBrand ME 8C NT Chemistry Diaphragm Pump
-6%
Chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors. The one-stage construction provides the advantageous combination of high pumping speed and low ultimate vacuum down to 70 mbar. All major parts in contact with pumped media are made of chemically resistant fluoroplastics. Well-proven...
From $4,869.00 From $5,193.80
VacuuBrand MZ 1C Chemistry Diaphragm Pump
-6%
Chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors. The two-stage construction provides the advantageous combination of high pumping speed and low ultimate vacuum. All major parts in contact with pumped media are made of chemically resistant fluoroplastics. Well-proven PTFE-sandwich diaphragms increase reliability...
From $1,886.00 From $2,012.60
VacuuBrand MZ 2C NT +2AK Chemistry Vacuum System
-6%
This chemistry vacuum system has a wide range of applications like evacuation, evaporation and pumping of gases and vapors in chemical, biological and pharmaceutical laboratories where there are no requirements for condensation of solvent vapors at the outlet. Typical applications are vacuum concentrators, gel dryers and filtration. The separator at...
From $3,754.00 From $4,004.80
VacuuBrand Non-Chemistry Diaphragm Pumps (Oil-Free)
-6%
VACUUBRAND® Oil-free Non-chemistry Diaphragm Pumps are designed specifically for non-corrosive, non-evaporative applications. This line of aluminum-FKM diaphragm pumps are an excellent choice for a wide range of laboratory and process plant vacuum applications. Features No Oil Changes These vacuum pumps utilize diaphragm vacuum technology. The totally dry operation eliminates the...
From $837.00 From $893.60
Vacuubrand VARIO® Select PC 3001 Oil-Free Vacuum System, Integrated Controller
-6%
The PC 3001 VARIO select pumping unit precisely controls the vacuum level in order to achieve unparalleled process control. This pump is suitable for even high boiling point solvents. The integrated VACUU-SELECT® controller provides an easy-to-use, application based interface that covers all common lab applications. The VACUU-SELECT® controller has you...
From $8,426.00 From $8,988.00
Welch CB2052, 2.3 CFM, Oil-Free, Diaphragm Pump
-5%
Welch 2052, 2.3 CFM, Oil-Free, Diaphragm Pump Save Money. Identical To Welch Model 2052B-01 This UL Certified vacuum pump is manufactured by Welch and private labeled specifically for Cascade Sciences customers. It is identical to Welch's standard 2052B-01 but costs about $1,000 less. With chemical resistant PTFE diaphragms/heads it is...
From $2,935.00 From $3,090.00
Welch® Chemical Duty Diaphragm Pumps, Explosion Proof Motor
-3%
Welch corrosion-resistant diaphragm vacuum pumps are driven by explosion-proof motors rated for Class I Hazardous Locations (HazLoc). The aluminum pump 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...
From $5,807.00 From $5,995.00
Welch® DryFast Diaphragm Vacuum Pumps
-4%
From $2,140.00 $2,049.00
Welch DryFast™ 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. Economical DryFast™ vacuum pumps are perfect for tough lab applications. Features Chemical Resistant Oil-Free Tuneable Vacuum Applications Aspiration Replace House Vacuum...
From $2,049.00 From $2,140.00
Welch® DryFast Ultra Diaphragm Pumps
-5%
From $3,055.00 $2,910.00
Welch DryFast™ PTFE Diaphragm Vacuum Pumps enable precise vacuum control for organic evaporations with exclusive Advanced Vapor Management. Oil-Free, portable, chemical resistant, 2 head diaphragm design simplifies maintenance. Economical DryFast™ vacuum pumps are perfect for tough lab applications.Key Features Chemical Resistant Oil-Free Tuneable Vacuum Suggested ApplicationsRotary Evaporator Model Number 2032...
From $2,910.00 From $3,055.00
Welch® Gemini Portable Vacuum Filtration Pump
-3%
Bring vacuum to where you need it. GEMINI pumps operate on DC power and are readily used with a car adapter or 120VAC adapter. Excellent vacuum for filtration or sampling - 190 torr, 9 l/min. Small, lightweight, portable. Polyarlyamide heads, fluoropolymer elastomer diaphragms, tubing, valves.Key Features Powerful, portable, economical Advanced...
From $691.00 From $710.00
Welch® High Capacity Diaphragm Pumps with 4 Heads
-5%
These premier Welch-manufacturered pumps are high capacity, high-vacuum, and are built for chemical-duty. These PTFE dry vacuum pumps provide either 1.5 torr ultimate pressure (with a 65L/minute flow) or 6 torr ultimate pressure (with a 100L/minute flow).Both pumps rate for vacuum ovens and laboratory applications. With PTFE (polytetrafluoroethylene) heads, perfluoroelastomer...
From $3,807.00 From $3,995.00
Welch® High Capacity Diaphragm Pumps with 8 Heads
-1%
These premier Welch-manufacturered pumps are high capacity, high-vacuum, and are built for chemical-duty. These PTFE dry vacuum pumps provide a variety of ultimate pressures and displacement to suit your application needs.Both pumps rate for vacuum ovens and laboratory applications. With PTFE (polytetrafluoroethylene) heads, perfluoroelastomer valves, and PTFE-coated molded diaphragms, these...
From $4,960.00 From $5,020.00
Welch® Model 2014 DryFast Collegiate Diaphragm Pump
-4%
Welch DryFast™ 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...
From $1,470.00 From $1,525.00
Welch® Self-Cleaning Vacuum Systems
-5%
From $3,615.00 $3,443.00
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. <120°C. Includes analog gauge and vacuum...
From $3,443.00 From $3,615.00
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