RANGER API 6D Check Valve

API 6D Swing Check Valves

The RANGER API 6D Swing Check Valve are both inline repairable and full-port piggable. Suitable for horizontal and vertical installations, the RANGER API 6D Swing Check valves are available in sizes from 2″ to 60″ and from ASME Class 150 to 2500.

Key Application(s)

  • Water, petroleum and natural gas

Design Features

  • Firesafe design (ISO 10497)
  • Standard valves meet NACE MR0175 & ISO 15156
  • In-line repairable & full-port piggable
  • Full stainless steel seat with replaceable O-ring
  • Forged steel disc (cast for sizes >4”) with 316 overlay on
    sealing area
  • Dovetail seat seal groove
  • Bleed Plug on cover; and boss provided for drain plug
  • Support feet on 6” and larger & lifting eye bolts on 4” and larger
  • Suitable for horizontal and vertical installation.
  • Standard document package BS/EN 10204-3.1
  • All O-rings are AED (anti-explosive decompression)
  • Independent dual cover seals o-ring for the primary seal,
    supported by a firesafe 316 SS spiral wound graphite
    gasket or metal real ring (non-pressure seal design).
  • Pressure seal cover standard for larger/high-pressure valves (10” and larger ASME 1500 & 8” and larger ASME 2500)
  • Optional items such as external weighting or lock-outs available on request


Design Standards

  • API 6D
  • CSA Z245.15
  • ASME B16.34


  • ASME B16.10

End Connection

  • ASME B16.5
  • ASME B16.25

Fire Safe

  • ISO 10497

Sour Service

  • NACE MR 0175
  • ISO 15156