BS 1868 Cast Steel Swing Check Valve

Short Description:

  • Bonnet: Bolted bonnet or pressure seal bonnet
  • Integral body seat or renewable seat ring
  • Uni-directional
  • Swing type disc
  • Casting disc (above 4”) or forged disc ( 2” to 4”)
  • Non full opening or full opening disc
  • Piggable for API 6D type
  • Lifting lug for 4” and above

Product Detail

Product Tags


Design Standard: BS 1868 or API 6D
Pressure-temperature Ratings: ASME B16.34
Size Range: 2” to 48”
Pressure Range: Class 150 to 2500
End Connections: Flanged RF, RTJ, FF, Butt Weld
Bonnet: Bolted or pressure seal bonnet
Flanged End Dimensions: ASME B16.5 (≤24”), ASME B16.47 Series A or B (>24”)
Butt Weld End Dimensions: ASME B16.25 Face to Face
Face to Face Dimensions: ASME B16.10
Inspection and Testing: API 598, API 6D
Body Materials: WCB, CF8, CF3, CF3M, CF8M, CF8C, A995 4A, 5A, 6A, C95800, INCONEL 625, INCONEL 825, MONEL, WC6, WC9, LCB, LCC.
Trim Materials: 1#, 5#,8#,10#,12#,16#
Bolting Materials: ASTM A193 B7, B7M, B8, B8M / ASTM A194 2H, 2HM, 8, 8M.


API 6D Full Opening Port
Cryogenic Testing
PTFE coated bolts & nuts
Zinc coated bolts & nuts

Product Introduction

Dual plate check valve is also named as double door check valve, is used to avoid back flow in pipelines. It’s uni directional type, so should be installed as per the flow direction which is indicated on the valve body. Different from other type valves, check valve is an automatic operation valve, no need any operation. The flow media hit the disc and force the disc open, so the flow media can go through, and if the flow hit the disc on the opposite side, the disc will tightly close to the seat facing , thus the fluid is not able to go through. Swing check valves are widely used for oil & gas, petrochemical, refining, chemical, mining, water treatment, power plant, etc.

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