API 594 / ASME B16.34
API 594 Cast Steel Check Valves
Automatic backflow prevention in process and utility piping. Size range 2–48 in; available classes: Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500.
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Pump discharge, compressor discharge, process lines, pipelines and utility systems. Compare design standard, pressure class, size range, materials and end connections before selecting a product family.
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Choose the construction that best fits your service. Each collection shows the available pressure classes and project configuration options.
API 594 / ASME B16.34
Automatic backflow prevention in process and utility piping. Size range 2–48 in; available classes: Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500.
View product range →API 602 / ASME B16.34
Compact small-bore non-return service. Size range 1/2–2 in; available classes: Class 800, Class 1500.
View product range →ASME B16.34 / API 594
High-pressure backflow prevention in steam and process lines. Size range 2–24 in; available classes: Class 600, Class 900, Class 1500, Class 2500.
View product range →API 594 / ASME B16.34
Compact backflow protection with reduced installation weight. Size range 2–48 in; available classes: Class 150, Class 300, Class 600, Class 900.
View product range →API 594 / ASME B16.34
Lower pressure drop and fast closure in demanding process or pipeline systems. Size range 2–48 in; available classes: Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500.
View product range →Selection Guide
For check valves, review orientation, flow direction, allowable pressure drop, closure behavior, body material and end connection. The final selection should match the piping class, service conditions and project specification.
Typical Applications
Pump discharge, compressor discharge, process lines, pipelines and utility systems. Confirm fluid, pressure, temperature, cycling frequency and shutoff requirements before quotation.
Engineering Resources
Use these guides to compare designs, materials, end connections and RFQ requirements before selecting a valve family.
Send your valve list, datasheet or piping specification for review.