Check Valve
Check valves are automatic valves, which have safety applications to prevent flow returns and reduce water hammer. When the pump isn't working, they keep the pipeline full.
These valves are unidirectional and can be installed horizontally or vertically on the line.
Competitive advantages
- Minimum disk stroke to fully open position
- Rapid action
Recommended for
- When there are frequent circulation changes in the pipe
- For use with globe and angular valves
- For use when the pressure drop through the valve is no problem
- ESIGN AND MANUFACTURING
- INSPECTION AND TEST
- FLANGE DIMENSIONS
- WELDED OR THREADED ENDS
- FACE TO FACE AND END TO END
BS 1868: Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries.
ASME B 16.34: Valves-Flanged, Threaded, and Welding End.
API 602: Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries
API 6D: Pipeline Valves. Pressure Test Specification.
API-594: Check Valves: Wafer, Wafer-Lug, and Double Flanged Type
BS-5352, Obsolete, replaced by ISO 15761
ISO 15761: Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries (Equivalent to API 602)
API 602: Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries (Equivalent to ISO 15761)
API 6D: Pipeline Valves. Pressure Test Specification
API 598: Valve Inspection and Testing
ASME B 16.5: Pipe Flanges and Flanged Fittings
ASME B16.47: large diameter steel flanges: nps 26 through nps 60
MSS SP 44: Steel pipeline flanges
ASME B16.25: Buttwelding ends
ASMEB16.11: Forged fittings, socket-welding and threaded
ASME B1.20.1: Pipe threads general purpose
ASME B 16.10: Face-to-Face and End-to-End Dimensions of Valves
API 6D: Pipeline Valves. Pressure Test Specification
API-594: Check Valves: Wafer, Wafer-Lug, and Double Flanged Type