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Compact oil-free diaphragm vacuum pumps and compressors engineered for OEM applications requiring a leak-tight gas path, low power consumption and dependable pressure or vacuum performance.
Thomas diaphragm technology offers flow rates from 530 ml/min to 90 L/min, pressure up to 3 bar / 43.5 PSI and vacuum down to approximately 1 mbar absolute / 29.2 inHg.
Thomas diaphragm vacuum pumps and compressors combine compact dimensions with strong pneumatic performance, making them suitable for OEM devices where installation space is limited.
A flexible diaphragm separates the drive mechanism from the pumped gas, providing a leak-tight air path and eliminating lubricating oil from the gas stream.
Thomas offers multiple diaphragm pump platforms covering low-flow precision applications through larger pumps capable of flows up to 90 L/min and pressure up to 3 bar.
The Thomas diaphragm portfolio covers a broad range of flow, pressure and vacuum requirements for OEM equipment.
Approximately 0.018 CFM for compact low-flow applications.
Up to approximately 3.2 CFM depending on pump configuration.
Equivalent to approximately 43.5 PSI.
Equivalent to approximately 29.2 inHg vacuum.
Available in single-head and dual-head pump designs.
Multiple motor technologies support different OEM life and power requirements.
Thomas diaphragm technology combines clean gas handling with efficient operation and dependable lifetime performance.
Efficient diaphragm technology helps reduce electrical demand in portable and continuously operating equipment.
Low operating noise supports medical, laboratory and indoor OEM equipment where workplace comfort matters.
Oil-free design and engineered diaphragm materials support continuous operating cycles with minimal maintenance.
The diaphragm isolates the pumped gas from the mechanical drive for reliable gas containment.
Strong pneumatic performance relative to pump size simplifies integration into space-constrained equipment.
Thomas diaphragm pumps are engineered to maintain consistent pneumatic performance throughout their operating life.
Thomas diaphragm platforms can be extensively customized around pneumatic, electrical and media compatibility requirements.
Compact single-head configurations for straightforward pressure or vacuum requirements.
Dual-head designs can provide higher flow or enhanced pressure and vacuum capability.
AC motor configurations for mains-powered OEM systems and equipment.
DC drive options for battery-powered, portable and mobile equipment.
BLDC options support long motor life, efficiency and electronic control.
Diaphragm and sealing materials can be selected according to the pumped gas and operating environment.
Thomas offers multiple elastomer options to help match chemical, temperature and media compatibility requirements.
Compact size, clean gas handling and reliable performance make diaphragm technology particularly valuable in medical, environmental and analytical OEM equipment.
Thomas gas diaphragm pumps are reciprocating positive-displacement pumps. Motor rotation is converted into linear diaphragm movement to alternately increase and decrease the volume inside the pump head.
Correct selection requires balancing pneumatic performance, motor requirements, media compatibility and expected operating life.
Common engineering questions about Thomas diaphragm vacuum pumps and air compressors.
A Thomas diaphragm pump is an oil-free reciprocating pump that uses a flexible diaphragm and one-way valves to move air or gas and generate pressure or vacuum.
Thomas diaphragm pumps cover flow rates from approximately 530 ml/min or 0.018 CFM up to approximately 90 L/min or 3.2 CFM.
Depending on the model, Thomas diaphragm compressors can provide pressure up to approximately 3 bar or 43.5 PSI.
Selected models can achieve vacuum down to approximately 1 mbar absolute, equivalent to approximately 29.2 inHg vacuum.
Yes. The diaphragm separates the mechanical drive from the pumped gas, providing an oil-free and leak-tight gas path.
Depending on the series, Thomas diaphragm pumps can use AC, DC or brushless DC motors.
Depending on the model and application, available materials include EPDM, FKM, FFKM and PTFE.
Yes. CompreVac can assist with pump selection based on required flow, pressure or vacuum, motor type, voltage, gas compatibility, duty cycle and OEM installation requirements.
Contact CompreVac with your required airflow, pressure or vacuum, gas or media details, voltage and duty cycle. We can help identify the appropriate Thomas diaphragm pump or air compressor for your OEM equipment.
Thomas’ diaphragm vacuum pumps and compressors are characterized by an excellent size to performance ratio. A leak-tight air path and stable performance over a lifetime complete the picture.
The overall portfolio includes a number of product lines. Flow rates range from 530 ml/min (0.018 cfm) to 90 l/min (3.2 cfm). The pneumatic performance covers pressures up to 3 bar (43.5 psi) and vacuum levels up to -990 mbar (29.2 in.Hg). Various motor options address lifetime requirements.
Benefits of Thomas Diaphragm Technology
By design, Thomas diaphragm pumps provide significant benefits to the end-user.
Characteristics of Thomas Diaphragm Air Compressors
The diaphragm pump platform can be extensively customized to meet rigorous application and project requirements. Depending on the model series selected, different pump configurations, motors and elastomer materials are available.
Diaphragm Pumps and Compressors for Key Industries
Our gas diaphragm pumps and compressors are designed to consistently meet customer specifications and performance requirements. Whether the task is to transfer air or gas from A to B or to meet a precise working point, diaphragm technology is a highly efficient and reliable way of getting the job done.Thanks to the reliable performance, compact size, and efficient operation Thomas gas diaphragm pumps are the first choice for medical and environmental industries amongst others.Especially mission-critical and portable devices like gas analysis rely on our products. Application know-how and years of experience allow our Engineering teams to customize your pump to the most demanding conditions.
How Diaphragm Pumps and Compressors Work?
Gas diaphragm pumps are reciprocating pumps. An eccentric transforms the motor’s rotational movement into an up and downward motion of a con-rod. Attached to the con-rod is a flexible diaphragm. The linear movement of the con-rod causes the diaphragm to sweep through a clearance volume within the pump head. On the down-stroke air or gas is drawn into the pump head assembly. On the up-stroke the media is pushed back out.