API 602 Piston Check Valve Description
API 602 standard piston check valves are compact and suitable for applications up to and including DN100 (NPS 4) in the oil and gas industry.
Features
Durable: Made of forged steel, it has high strength and durability to withstand high pressure and temperature environments.
Easy to operate: The bolted bonnet and spiral gasket design ensure good sealing performance and make maintenance and packing replacement easier.
Flexible configuration: You can choose flange smooth surface or ring connection ports to adapt to different pipeline connection requirements.
Various types: Depending on the specific application scenario, piston check valves can be configured in different ways such as lift type (spring loaded) or ball type.
High performance: Meets the wall thickness requirements of API 602 standard, extending service life and ensuring reliable operation under harsh conditions.
API 602 Piston Check Valve specification
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Suitable applications |
Water. Oil. Gas |
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Design Manufacture |
API 602, API 6D , ASME/ANSI B16.34 |
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Connection |
ASME/ANSI B16.5 & B16.47 A/B series. EN1092.BW, RTJ are available |
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Bonnet structure |
Bolted. Pressure Seal. Welded |
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Pressure rating |
Class 150～2500LB | |||
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Size |
1/8"~4" |
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Sealing structure |
metal seal covered with stellite hard face to get reliable performance and service life. |
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Inspection and approval norm |
API598, API6D. |
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Suitable temperature |
196~800℃ |
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API 602 Piston Check Valve in stock
Advantages
High-pressure tolerance:
The tensile strength of forgings is ≥485MPa, and the pressure bearing capacity reaches Class 2500LB (42MPa).
Long-term sealing:
The carbide sealing surface is resistant to particle erosion, and the service life is increased by 3-5 times.
Zero leakage design:
The self-sealing valve cover eliminates the risk of leakage in the middle flange.
Compact and lightweight:
The structural length is 20% shorter than the ordinary standard (API 602 compact design).
Applications
Energy and power:
Boiler feed water pump outlet (high-pressure pipeline above Class 1500LB);
Turbine extraction system (to prevent steam backflow from causing overspeed accidents).
Petrochemical:
Hydrogenation reactor inlet and outlet (sealing requirement ≤0.01% leakage rate);
High-pressure crude oil pipeline (sulfur corrosion resistant material F22/F91).
High-end industry:
Deep-cold liquefaction device (-196℃ liquid nitrogen/liquid oxygen pipeline);
Ship power system (stainless steel material resistant to seawater corrosion).
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