In-line Check Valve

In-Line Check Valve

In-line check valve in various dimesions. Can be used in compressed gas and air systems, water systems, and vacuum pumps.

Introduction of In-Line Check Valve

An in-line check valve is similar to a lift check valve. The main difference is that an in-line check valve has a spring that rises when there is pressure on the upstream line of the valve. The primary function of this check valve is to prevent the backward transfer of pressure, instead of the flow itself. 

Depending on the operating conditions, an in-line check valve can be made from different durable materials. Some of these are stainless steel, carbon steel, forged steel, and brass. Generally, this check valve type is made with a full port as it provides several benefits. Among these are simple installation, low-pressure drop, and less water hammer.

An in-line check valve is commonly used in compressed gas and air systems, water systems, and vacuum pumps.


Valve Size2″~ 12″
Pressure Class1500LB~2500LB
MaterialsWCB, WC6, WC9, WCC, CF8, CF3, CF3M, CF8M, 4A, 5A
Design and Manufacturing StandardsBS 1868
Face to Face StandardsASME B16.10
Flange Dimension StandardsASME B 16.5, ASME B16.47
Pressure Test StandardsAPI598
Fire Safety Test StandardsAPI 607
Quality/Product CertificationsISO9001, ISO14001, ISO18001
Fugitive EmissionsISO 15848-1, API 622
Valve operator options
Shutoff ClassAPI 598 (Zero Leakage), API 6D
Process Connection TypesRF, RTJ, BW

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