What is Diaphragm compressor? How it works?


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Compressors are storage devices used to collect and store atmospheric air in a high potential, which is used for pneumatic instruments.

What is the Diaphragm compressor?

Diaphragm compressor is also known as membrane compressor. This compressor compresses the air by using a rotating membrane, to draw air into the compression area and give it the pressure to be stored in the storage tube section.

The diaphragm compressor consists of a hydraulic piston system. Which is well sealed and bearings were removed in the design as the ionic liquid does not mix with the gas.

Components of Diaphragm compressor:

Check valves: The check valves are specified to match the operating conditions and the process gas. The valves are easily accessible for inspection, repair or replacement.

Hydraulic inlet check valve: Inlet check valve hydraulic fluid.

Hydraulic pistons: Piston is to pressurise the diaphragm. For higher pressures, a piston without a ring, without packing, adjusts to the return to a hardened and sharpened sleeve.

Hydraulic overpump valves: It controls the pressure in the hydraulic system. The combined movement of the stem, ball, and spring determines the pressure range of the valve.

Overpump sight glass: Provides the visual indication of hydraulic fluid in the piston.

Hydraulic injection pump: The pump that injects fluid to the hydraulic system, which is driven by the crankshaft.

Working of diaphragm compressor:

The diaphragm compressor consists of 2 systems, a hydraulic system and an air pressure system. Metal diaphragm is a protective component between the two systems.The air pressure system consists of 3 diaphragm metal plates which are sandwiched between two plate cavities, air input and output processes.

Hydraulic crankshaft motor control system that moves the piston in low pressure. The transfer of this piston regulates the hydraulic fluid opposite to lower the side part of the diaphragm, the cavity swing causes a change in the air process.

Some components of the hydraulic system can automatically fill the pump, hydraulic fluid valve and air hydraulic valve that pumps excess air.

To ensure that the hydraulic system always meets the pressure rotation, the automatic filling pump sends fast angler in the hydraulic system after the compressor is turned off. When there is a compressive force on the main piston, the check valve protects the hydraulic system from the automatic filler pump, therefore a pressure booster can be produced in a system that opposes the hydraulic pump valve

Advantages of Diaphragm compressor:

  • Oil-free compression due to the hermetic separation between gas and oil chamber.

  • Abrasion-free compression due to static seals in the gas stream

  • Automatic shutdown in case of a diaphragm failure prevents damage

  • Discharge pressure up to 3000bar.