Keystone Model CompoSeal Butterfly Valves

Keystone Model CompoSeal Butterfly Valves

Resilient seated butterfly valves with valve body and disc in high engineered composite material providing excellent internal and external chemical resistance.

Certifications ABS, PED
End Connection Wafer
Application Filtration, Cruise Ship, Air Circulation
Material Composition Fiber
Operating Temperature Less than 150 C
Pressure Class PN
Process Connection Type PN16
Seat/Seal Type Resilient
Shutoff Class Zero Leakage
Valve Size NPS 12 / DN 300, NPS 2-1/2 / DN 65, NPS 3 / DN 80, NPS 1-1/2 / DN 40, NPS 6 / DN 150, NPS 4 / DN 100, NPS 8 / DN 200, NPS 10 / DN 250
Valve Size Standard DN
Valve Type Butterfly
Media Water, Air
  • Patented wafer style body and disc in high engineered composite results in excellent internal and external chemical resistance.
  • Light weight construction results in lower cost and simplified installation.
  • No extra pipe support needed when installed in plastic or GRP piping.
  • Disc in high engineered composite material provides excellent corrosion resistance.
  • All fasteners in stainless steel 316 as standard.
  • Bubble tight shut-off in both directions, in accordance with EN 12266-1 leakrate A.
  • Pressure range up to PN 16 at elevated temperature.
  • Valve can be used in high line velocity applications up to 12 m/sec.
  • Spindle and primary valve seals are not influenced by the flange bolting force or pipe flange type.
  • High Kv (Cv) value.
  • No need for flange gaskets.
  • Primary stem sealing exceeds the pressure rating of the valve and prevents leakage through the shaft area to atmosphere.

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