Series 59 Model 51 API 602 Check Valve
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Main Features
Bolted Bonnet / Pressure Seal Bonnet
Swing Type / Lift Type (Piston Type) / Lift Type (Ball Type)
Size
Body and Bonnet Materials
Trim Materials
Pressure Rating
Ends Connection
Surface Coating
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API 602 is a standard developed by the American Petroleum Institute (API) that specifies the requirements for compact forged steel gate valves, globe valves, check valves, and filters. It covers small-bore sizes with a maximum nominal diameter of NPS 4 (DN 100) and pressure ratings up to 2500 or 4500, depending on the design scope.

Valve Types: Gate valves, globe valves, check valves, and filters;

 

Size Range: 1/4'' ~ 2'' (DN8 ~ DN50);

 

Pressure Ratings: ANSI Class 150, ANSI Class 300, ANSI Class 600, ANSI Class 800, ANSI Class 1500, and ANSI Class 2500;

 

Valve Body Construction: Forged steel valve body, such as A105, F304, etc., with high pressure and high temperature toughness;

 

End Connections: Threaded connection, socket weld connection, flange connection, or butt weld connection.

 

Face-to-Face: Shorter structural length and smaller overall size compared to heavy-duty cast valves such as API 600;

 

Bonnet Options: Bolted Bonnet, Welded Bonnet, Pressure Sealing Bonnet, designed to prevent leakage under stringent operating stresses;

 

Emissions Compliance: Typically designed to meet fugitive emission requirements such as API 624 or ISO 15848-1.



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