Triple Offset Metal-Seated Butterfly Valve

The triple offset metal-seated butterfly valve uses a three-fold offset — between the seat axis, the disc rotation axis and the sealing cone — so that the disc fully disengages from the metal seat during opening and closing without friction, and contacts the seat only in the final wedge-in phase of closure. The result is metal-to-metal, friction-free and zero-leakage sealing. Hard metal seating (stainless steel / Stellite weld overlay) provides high-temperature resistance, wear resistance and fire safety, with a wide temperature range that can extend to both cryogenic and high-temperature duties. Sealing is reliable and service life is long; the valve can replace gate and ball valves on large-diameter pipelines in some duties. Design basis: API 609, EN 593.

· Triple offset geometry: no friction through the full stroke, long seat life · Metal-to-metal hard seating, zero-friction wedge-in for zero leakage · High-temperature, wear-resistant and fire-safe (loss of the soft seat does not affect sealing) · Wide temperature range, extendable to cryogenic service · Economical alternative to gate/ball valves on large-diameter lines · Manual / worm gear / pneumatic / electric actuator

For large-diameter lines carrying high-temperature flue gas, steam, oil and gas, chemicals and cryogenic media, in isolation and control duties that require metal hard seating, fire safety and long service life; Vexval's flagship butterfly valve range.