2901186400 Atlas Copco Screw Air compressor Check Valve Kit Original

I. Main Components of Atlas Copco Check Valve Kit Valve body

It is usually made of cast iron, cast steel or stainless steel, serving as the main body of the fluid passage, connecting the compressor's exhaust port with the downstream pipeline (such as the storage tank), and needs to withstand high compressed air pressure (generally 0.7-1.3 MPa).

Valve core (valve disc)

Common forms include disc type, piston type or spherical type. The material is mostly wear-resistant metals (such as brass, stainless steel) or engineering plastics. It is in close contact with the valve seat to achieve sealing and prevent reverse flow of the gas.

Valve seat

It is located inside the valve body and contacts the valve core to form a sealing surface. Usually, materials with higher hardness (such as bronze, stainless steel) are used. Some designs may incorporate rubber sealing rings to enhance the sealing performance. Spring

Provide preload force to keep the valve core closed. When the exhaust pressure of the compressor is greater than the sum of the spring force and the downstream back pressure, the valve core is pushed open, and compressed air passes through; when the compressor stops, the spring pushes the valve core back to its original position, cutting off the return flow path.

Auxiliary components

Include guide sleeves (to ensure smooth movement of the valve core), sealing rings (to prevent leakage at the connection between the valve body and the pipeline), bolt and nut (for component fixation), etc.

II. Working principle of Atlas Copco Check Valve Kit

When the compressor is running: The high-pressure air discharged by the compressor overcomes the spring force and the downstream pressure, pushing the valve core away from the valve seat, and the air flow passes through the check valve and enters the air reservoir or subsequent system.

When the compressor stops or is unloaded: The exhaust pressure drops, and the spring force pushes the valve core closed, blocking the return flow of compressed air in the air reservoir to the compressor, avoiding rotor reverse rotation, lubricating oil spilling into the air path, and other problems.

III. Key technical requirements of Atlas Copco Check Valve Kit

Sealing: The fit between the valve core and the valve seat needs to be precise to ensure no leakage in reverse direction. Otherwise, it will cause a decrease in system pressure and an increase in energy consumption.

Response speed: It needs to open/close quickly to reduce pressure loss, especially when the compressor frequently starts and stops, it needs to operate reliably.

Toughness against wear: The valve core, valve seat, and other components need to withstand the long-term erosion of the compressed air that may contain trace amounts of oil mist and impurities.

Pressure resistance: The valve body needs to withstand 1.5-2 times the maximum exhaust pressure of the compressor to prevent cracking.