Center lined wafer butterfly valve
Center lined wafer butterfly valve

Butterfly Valve – KKD-81

Centric Butterfly valve is a cost-effect compact solution for general purpose applications. With multiple rubber seats to choose from.

In a center lined butterfly valve, the stem is centered in the middle of the disc and the disc is centered in the bore.
In this type of valve, the disk first interacts with the seat at about 85° for a 90° rotation.
Center lined butterfly valves are widely used in low-pressure applications.

The wafer body type of the butterfly valves has been designed to keep a tight sealing, to protect against bi-directional pressure differentials, and to prevent backflow in devices built for uni-directional flow.
This is accomplished by using a tight-fitting cap, such as an O-ring, as well as a smooth valve face on both the downstream and upstream parts of the valve.

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KKD-81 butterfly valve

Concentric Butterfly Valve to DIN/EN
DIN PN 10, 1½" - 12" (DN40 ~ DN300)
DIN PN 10, 14" - 48" (DN350 ~ DN1200)

Concentric Butterfly Valve to DIN/EN
DIN PN 16, 1½" - 12" (DN40 ~ DN300)
DIN PN 16, 14" - 48" (DN350 ~ DN1200)

Concentric Butterfly Valve to ANSI/ASME
ISO CLASS 125/150, 1½" - 12" (DN40 ~ DN300)
ISO CLASS 125/150, 14" - 48" (DN350 ~ DN1200)


Features

  • Suitable for use in HVAC, irrigation, industrial applications where positive shutoff is required
  • Single through-put shaft provides most economical pricing
  • 10 position lever or gear operation
  • Alloy material available on reques

Standards

  • End dimensions acc. to DIN2633
  • Inspection & test acc. to EN12266

Limitation

  • Do not use EPDM when hydrocarbons are present.
  • Kindly anticipate increased torque for PTFE coated disc + PTFE seat option; gear operation recommended for sizes ≥ 4”.

Options

  • Double “half pin” style available for increased performance and lifecycle
  • Coated disc available in: rubber, PTFE, nylon

Further butterfly valves

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