Check Valve API 6D

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Check Valve API 6D

CHECK VALVE

API 6D

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API 6D Check Valve Standard

Swing Check Valve API 6D

API 6D is the primary standard for valves used in pipeline service, including gate, plug, ball and check valves. Occasionally refinery and petrochemical purchasers will reference the more stringent testing requirements of 6D although the valve may have built under API 600, 602, 608 or 609 design criteria. API 6D covers the design, manufacture, testing, and documentation for pipeline ball, check, gate, and plug valves for pressure ratings up to ASME class 2500. The valve ends may be flanged or welding. If fluid can become trapped in the body cavity, then valves for both gas and liquid service must have a pressure relief. Actuators may be electric, hydraulic, or pneumatic.

Check Valve Pressure Rating
  • Check Valve API 6D Class 150
  • Check Valve API 6D Class 300
  • Check Valve API 6D Class 600
  • Check Valve API 6D Class 900
  • Check Valve API 6D Class 1500
Check Valve API 6D Features
  • Standard valves meet NACE
  • Support feet on 6” and larger
  • Lifting eye bolts on 4” and larger
  • Raised boss provided for optional drain plug
  • Standard document package BS/EN 10204-3.1
  • Bleed Plug on cover (to confirm pressure relief prior to servicing)
  • Suitable for horizontal and vertical (flow-up) installation. Engineering review of process conditions required for vertical installation.
APPLICABLE STANDARDS
Design & ManufactureBS 51/API 6D
Body & TrimNace MR 01-75
Casting InspectionMSS SP-53, 55, 59
TestingBS 6755 Part-I/API 598
Flange DimensionsANSI B16.5/B 16.47
Face to FaceANSI B16.10
DESIGN FEATURES
Bolted Bonnet
Renewable Seat Insert
Full-Bore Piggable
Soft Seated
O-Ring Installed on Clapper
Rated to +350F by The HNBR O-Ring
RTJ Bonnet Gasket for 600-2500 ANSI
Basic DesignAPI 6D & ANSI B16.34
Wall ThicknessAPI 6D
Face-to-Face DimensionANSI/ASME B16.10
Flange End DimensionANSI/ASME B16.5
Butt-Weld End DimensionANSI/ASME B16.25
Inspection & TestingAPI 6D