Butterfly Valve – KKD-83

Triple Offset Butterfly Valves with metal seat are designed for high-temperature and high-pressure applications, and are well-suited for applications requiring bi-directional zero leakage. These provide space and weight savings while minimizing installation and maintenance costs.

The triple offset butterfly valve has 3 offsets. In addition to the two offsets in the double offset butterfly valve, the third offset is achieved by altering the geometry of the sealing component. The seat is machined into an offset conical profile resulting in a right-angled cone. The third offset eliminates rubbing and reduces wear between the seat and seal ring during operation. There is no friction as the seal ring will immediately leave the valve seat when the valve isopened. Contact is only only made at the final point of closure. Once the seat and seal ring are in contact, torque is applied to create a bi-directional bubble tight seal.

A triple offset butterfly valve has three separate offsets from the valve body’s center.
The 'cam-controlled' and 'right-angle' conical seal design ensures that the metallic sealing components do not touch until the valve is finally closed.
This results in repeatable sealing and a significant increase in valve life.
Triple offsets are generally used in applications similar to gate valves, where and tight shutoff and/or quarter turn actuation is desired.

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KKD-83 Butterfly Valve

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KKD-MS83 butterfly valve

Triple eccentric butterfly valve
ANSI Class 150/300/600/900, DIN PN 16/40/63
2" - 72" (DN50 ~ DN1800)

Features

Tight Shutoff: Shutoff classes from ANSI IV to VI are available to meet customer requirement. Standard seat material is PTFE/RPTFE sealing ring, or 304+graphite multi-layer construction for high temperature applications. Metal to metal sealing face also available with CLASS IV leakage rating
Sealing Face: Sealing face is tightly fixed on valve disc. Depending on the service condition, sealing material can be chosen from PTFE soft seat for general application, 316+Graphite for high temperature applications, and metal to metal seal face for abrasive services.
Stem Design: Strong single piece shaft minimizes stem deflection, and allows bi-directional sealing effect with bubble tight leakage rating. Another feature of the stem is the blowout proof design, which improve the safety of operation.
Firesafe Design: Metal to metal sealing face with graphite seal and packing, allows inherent firesafe functions.
Uni- and Bi- directional sealing: KLINGER die Erste offers uni-directional sealing effect on standard butterfly valve delivery. When required, bi-directional seat ring is available with complete new independent and self-adjusting seat ring, which is in contact with the disc.