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The Twin Seal valve is an alternative to the original two-valve system with just one double-seated bubble-tight valve. The upstream and downstream seals provide the same function as the two block valves. The body (serving as a spool piece) bleed verifies seal integrity.
Design Feature
  • Full bore/reduce bore
  • Double block and bleed
  • Double seal
  • Close quickly
  • Zero leakage
  • Anti-static design
  • Fire safe design
Design Standard
  • Design: API 6D / API599
  • Face to face: API6D / ASME B16.10
  • Flange end:  ASME 16.5 / ASME 16.47   
  • Test: API598 / API6D
Technical Specification
  • Size: 2”~32”
  • Class: 150Lb~600Lb
  • Connection: Double flange
  • Operation:  Worm Gear / Electric actuator
  • Temperature: -60°C to +160°C
  • Application: Aviation fuel / oil storage / chemical industry
Material Option
  • Body: Carbon steel(WCB,LCB) / 
    Stainless steel(CF8,CF8M,CF3,CF3M)
  • Plug:  Carbon steel(WCB+ENP,LCB+ENP) / 
    Stainless steel(CF8,CF8M,CF3,CF3M)
  • Stem: F6a / 17-4PH / F316
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