International Valves

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Check Valve

Check valve is a one-way valve, non-return valve, usually allow the flow of fluids in one direction. Oilway offers Cast, forged, pipeline check valve design. Producing capabilities including 1/4” to 52” , ANSI Class 150~ Class 2500,material in Cast carbon steel, stainless steel, Forged steel, Alloy Steel and other exotic materials.

Care must be taken to select the most suitable check valve for your project. This includes Pipe size, Valve material, Pressure Temperature Rating, and Valve End Connection Flange RF or RTJ, butt welded, socket welded, thread . Other critical things to choose into account include NACE requirement.

Check valve applications in industry including Oil & gas, Petroleum Refining, Petrochemical, Pulp & Paper, Marine, Power Generation, Mechanical Construction, and Industrial Gas.

Valve Bonnet is a main part of check valve, depending on applications, check valves can have bolted, or pressure seal bonnets. Bolted bonnets provide sealing in larger valves and higher pressure applications. In this type, the bonnet and valve body are flanged and bolted together. Pressure seal check valves are ideal for high-pressure applications (more than Class 600). This type of construction uses internal pressure to create a better seal.

Pressure seal bonnets have a downward-facing cup inserted into the valve body. When internal fluid pressure increases, the cup's forced outward, improving the seal. Oilway offers both a wafer, swing and lift disc design check valve, Bolted bonnet or pressure seal bonnet check valve.