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 It will make the valve has a nonstop fixing surface on the circle and make the valve didn't touch the seat at all when it is completely opens. This plan will make the seat encounter a less grating and accordingly will delay its lifetime. In common application, this twofold balance butterfly valve is restricted to class 150.
The double eccentric  butterfly valve`s sealing ring is made of elastomer fit in disc, it availabe be used in unidirectional sealing application, Commonly used in the water or municipal water appliacation.
Design Feature
  • Replaceable seal on disk
  • Less seat wear, Low torque
  • Super long usage life
  • Renewable sealing ring
  • Epoxy paint body&disc
  • ISO 5211 top flange
  • Zero leakage
Design Standard
  • Design: AWWA C504
  • Face to face: ANSI B16.10 / ISO5752-13
  • Flange end: ASME B16.5 / ASME B16.47 / EN1092-2
  • Test: API598
Technical Specification
  • Size: 4”~80”(DN100~DN2000)
  • Class: 150Lb(PN10,PN16,150PSI,165PSI,225PSI)
  • Connection: Double Flange
  • Operation: Worm Gear / Electric actuator 
  • Temperature: -20°C to +80°C
  • Application: Municipal water / Sea water / Water Supply Service
Material Option
  • Body: Cast iron / Ductile iron
  • Disc: Cast iron / Ductile iron
  • Stem: SS420
  • Disc sealing: EPDM / NBR
  • Body seat: Seat with SS304
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