How Do Diaphragm Compressors Work?

Types of diaphragm

1. What is diaphragm compressor?

The Diaphragm Air Compressor is also known as Membrane Compressor. It’s a type of positive displacement air compressor. Generally, there are two types of positive displacement air compressor: the reciprocating air compressor and the rotary air screw compressor. The Diaphragm Compressor is a type of reciprocating compressor.

The Diaphragm Air compressor works by the back-and-forth motion of a flexible membrane: this diaphragm is deflected by a rod and a crankshaft mechanism motivated by the oil injection.

Sollant Diaphragm Air Compressor membrane

2. What is the working principle of the diaphragm compressor?

The key part of the Diaphragm Air Compressor is the membrane inside the compressor. It’s a round flexible plate and under axial loading, it undergoes an elastic deflection, which creates a reduction in the volume of the space to make the compression. The Diaphragm Compressor is especially used for rare gases or toxic gases compression, the membrane is designed in many different materials, sizes, and shapes.

Types of diaphragm

Basically, the structure of the diaphragm compressor is divided into two parts: the hydraulic framework and the pneumatic force framework. During the compression process, there are two steps: the suction stroke and the delivery stroke.

Diaphragm Compressor working principle

Suction stroke: To intake the air, the compensating pump delivers a low quantity of oil through the check valve in the oil head. Thus the piston ring leaks and the membranes approaches the oil head so that the air can enter in.

Delivery Stroke: To compress the air, the number of oil increases to lift the membrane towards the gas and reduces the space of the air. As the internal pressure of gas goes higher than the external gas pressure, the valve opens and the compressed gas is released. The whole compression process is finished and the whole cycle repeats.

Sollant, as a professional Diaphragm Compressor supplier, we produce and offer various types of Diaphragm Air compressors. Our main products are the followings:

*V type Diaphragm Air Compressor

V type Diaphragm Air Compressor

*Z type Diaphragm Air Compressor

Z type Diaphragm Air Compressor

*D type Diaphragm Air Compressor

D type Diaphragm Air Compressor

*L type Diaphragm Air Compressor

L type Diaphragm Air Compressor

3. What is diaphragm compressor used for?

As we mentioned before the Diaphragm Compressor is designed with a special structure: only the membrane and the compression box come in touched with pumped gas; besides, the hydraulic framework offers a better sealing performance. For these reasons, this kind of air compressor is the best choice of toxic and rare gases compression. This also requires that the membrane has adequate chemical properties and sufficient temperature resistance.

Rare gases

More specifically, the main applications of the diaphragm air compressor are: food and medicine industry, petrochemical industry, nuclear power generation, military equipment and scientific researches or testing, etc. The most common application is the industrial air process, such as hydrogen compression, etc. Actually, the hydrogen compressor is one kind of diaphragm compressor.


4. What is the advantage of a diaphragm compressor?

Due to its unique working principle, the diaphragm air compressor features the following advantages:

Advantages of Diaphragm Air Compressor

Thanks to the hydraulic framework, the compression process causes less vibrations and knock. And naturally, this diaphragm air compressor produces less noise.

Thanks to the tightness between the oil framework and the gas framework, this compressor provides oil-free compression.

Due to this oil injection process, the diaphragm compressor renders a better sealing performance. This also proves a tight compression of gas.

The diaphragm compressor provides compression without wear and tear.

Apart from the advantages mentioned above, our Sollant Diaphragm Compressor features other advantages: we promise to provide the diaphragm compressor of high quality by economic price. In summary, Sollant Diaphragm Compressor isn’t just an air compressor but a complete solution for toxic gases or rare gases of high value.

For more information, please click: Diaphragm Compressor