Diaphragm Pumps and Air Compressors

Wide Range of Diaphragm Air Compressors and Pumps for Air, Pressure, and Vacuum 

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.



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Benefits of Thomas Diaphragm Technology

By design, Thomas diaphragm pumps provide significant benefits to the end-user.

  • Low power consumption for reduced energy invest
  • Low sound level for workplace comfort
  • Service free operation for continuous work cycles

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.

  • Free flow up to 90 l/min (3.2 cfm)
  • Maximum pressure up to 3.0 bar (43.5 psi)
  • Maximum vacuum up to 1 mbar abs. (29.2 in Hg)
  • Single or dual head
  • AC, DC or brushless DC

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.

Key Industries Served with Our Diaphragm Pumps and Compressors

healthcare industry

Medical Devices

environmental industry


lab life science industry

Life Sciences Research

automotive industry


food and beverage industry

Food & Beverage

general manufacturing applications

General Manufacturing

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.

Learn about Diaphragm Technology
Diaphragm Gas Pump - working principle