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Nominal Diameter:  DN50-1200

Nominal Pressure PN : 1.0/1.6/2.0/2.5 (MPa)

Testing Pressure (water) Ps(MPa):

Body test:    1.5*PN

Sealing test: 1.1*PN

Double Flange Rubber Vulcanized Butterfly Valve Standard:

Design standard conform to: ANSI/AWWA C504

Connection Flange standard: DIN PN10/16/25, ANSI B16.1,BS4504,ISO PN10/16,JIS B2212/2213,BS10 table D, BS10 table E.

Top Flange conform to: ISO 5211 or as special requirement.

Face to face conform to: DIN3202 F16, ISO5752 series 13, BS5155 short

Test Standard conform to: API598

Double Flange Rubber Vulcanized Butterfly Valve Design Characters:

  1. Correcting holes made on valve flange according to standard. So it’s easy positioned when install.
  2. Integral ISO 5211 mounting flange will accept all styles of hand lever, multi-turn manual gear and power operators/actuators.
  3. Using through-out bolt ensures the butterfly valve with easy replacing and maintenance.
  4. Special design, high flow rate and low flow resistance.
  5. Suitable Medium: Water,  Sea water,  Gas, Oils, etc.
  6. No Leakage under the rated pressure.
  7. Phenolic backed seat is available. Which has following features:

    (1) Dimensionally stable seat sealing surface

    (2) Minimal seat wear, extending seat life

    (3) Blow-out proof seat

    (4) Easily field replaceable

    (5) Non-distorting shaft hole with molded-in (integral)o-ring seal