About Gas & Liquid Diaphragm Pumps

What Are The Main Features Of Diaphragm Pumps And Compressors?

The main features of diaphragm pumps are:

• low sound level, 
• high efficiency and gas tightness
• operational water vapor tolerance
• working point controllability
• very good size to performance ratio

Thomas membrane pump models are available with AC or DC drive. They are available in single and multiple head models, which can be configured in series or parallel.

Our range of diaphragm pumps proudly provides a wide range of flow rates from 0.01 cfm (0.3 l/min) to 3.2 cfm (91 l/min), along with end vacuum 29.2 in.Hg (990 mbar), and pressure up 44 psi (3.0 bar).

Most of Thomas diaphragm pump product lines feature several motor options ranging from AC, to low-cost DC up to brushless DC solutions. The sealed air path is inherent to the design itself. We address your required chemical resistance with a variety of pump head and elastomer materials such as PPS (Ryton) or FKM (Viton).

Can Diaphragm Pumps Run Dry?

Diaphragm pumps are oil-less pumps and can run dry. Thanks to that they are often used for the transfer of contaminated air or liquids or air with liquid particles.

Where Are Diaphragm Pumps Used?

Membrane pumps are equally suitable for use as a vacuum pump or an air compressor. Typical applications that use miniature diaphragm air pumps or miniature diaphragm vacuum pumps are handheld or portable gas detectors and analyzers used for environmental applications. Here, leak tightness and chemical resistance come into play. Dental autoclaves or Negative Pressure Wound Therapy (NPWT) devices rely on pump controllability, a low sound level, or pump lifetime and efficiency due to brushless DC configurations. Other equipment that uses diaphragm pumps are various medical devices or laboratory and life-science instruments, food and beverage, or round off-target applications, that require efficient, compact miniature vacuum pumps or miniature air compressors.

What Are The Benefits Of Selecting Gas Diaphragm Pumps?

• They are suitable for pressure, vacuum, or a combination of the two
• Provide gas tightness to the outside
• Are made from durable plastic or corrosion-resistant coated aluminum
• Can be customized, including a wide variety of elastomers and pump component materials
• Use long-life diaphragms
• Are balanced for low vibration
• Oil-less operation and low noise level
• Permanently lubricated bearings
• Thomas diaphragm pumps provide flow rates up to 3.2 cfm (91 l/min), end vacuum levels up to 29.2 in.Hg to (990 mbar), pressure up to 44 psi (3.0 bar)