FK Series Lugged Butterfly Valve

This FK version features the world's first integral lug design.

  • Easyfit handle
  • Excellent chemical resistance
  • Double self-lubricating seals

 

These valves feature stainless steel lugs permanently anchored in the body of the valve. This unique design provides for full bi-directional operation, and allows disassembly and assembly of the downstream flange connection without weakening the integrity of the upstream connection to the pressurized line. The same body, disc, and seal material options as the normal FK are available for the lugged version.

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PRODUCT DETAILS

Pressure: up to 150 psi at 73°F depending on the size

Sizes: 2-1/2" – 12"

 

SPECIFICATIONS

 

1.0 Butterfly Valves - FK

1.1 Material

  • The valve body shall be made of glass reinforced polypropylene (GRPP) obtained from homopolymer polypropylene (PPH).
  • The valve disc shall be made of stabilized PP homopolymer compound, also containing a RAL 7032 pigment, which shall meet or exceed the requirements of Type I Polypropylene according to ASTM D4101-86.

or

The valve disc shall be made of PVC compound which shall meet or exceed the requirements of cell classification 12454 according to ASTM D1784.

or

The valve disc shall be made of Corzan® CPVC compound which shall meet or exceed the requirements of 23447 according to ASTM D1784.

or

The valve disc shall be made of virgin, non-regrind PVDF compound which shall meet or exceed the requirements of Table 1 according to ASTM D3222.

  • These compounds shall comply with standards that are equivalent to NSF Standard 61 for potable water.
  • The valve shaft shall be made of 420 stainless steel.

1.2 Seats

  • The disc liner shall be made of EPDM which shall comply with standards that are equivalent to NSF Standard 61 for potable water.

or

The disc liner shall be made of Viton® (FPM) which shall comply with standards that are equivalent to NSF Standard 61 for potable water.

1.3 Seals

  • The o-ring seals shall be made of EPDM which shall comply with standards that are equivalent to NSF Standard 61 for potable water.

or

The o-ring seals shall be made of Viton® (FPM) which shall comply with standards that are equivalent to NSF Standard 61 for potable water.

1.4 All other wetted and non-wetted parts of the valves shall comply with standards that are equivalent to NSF Standard 61 for potable water.

2.0 Connections

2.1 Flanged style

  • The ANSI 150 flanged connections shall conform to the dimensional standard ANSI B16.5.

3.0 Design Features

  • The valve shall be of either wafer or lugged design (specifier must select one).
  • The lugged style shall feature permanently integrated stainless steel lugs.
  • Manual control of the valve shall be achieved through the use of either a lever handle or mounted gear box (specifier must select one).
  • The shaft shall have standard ISO square dimensions for direct mounting of actuators.
  • The disc seat shall be a trapezoidal elastomeric liner and provide a bubble tight seal.
  • The liner shall completely isolate the valve body from the process flow.
  • The liner shall function as a flange gasket on both sides of the valve.
  • The body cavity shall feature special channeling to prevent liner slippage and compression.
  • The disc, seats, and seals shall be the only wetted parts.
  • Teflon® seated o-ring seals shall prevent the stainless steel shaft from becoming wetted.

3.1 Pressure Rating

  • Valve sizes 1-1/2" through 10" shall be rated at 150 psi at 73ºF.
  • Valve sizes 12" shall be rated at 120 psi at 73ºF.

3.2 Markings

  • All valves shall be marked to indicate size, material designation, and manufacturers name or trade mark.

3.3 Color Coding

  • All valves shall be color-coded beige gray.

4.0 All valves shall be by IPEX or approved equal.