Featuring triple‑offset geometry and laminated sealing construction, the Durco TX3 butterfly valve achieves friction‑free throttling, low operating torque and long‑term bidirectional bubble‑tight shut‑off suitable for gas‑phase services.
The Durco TX3 triple‑offset butterfly valve delivers superior shut‑off performance while reaping the operational advantages of low‑torque actuation and minimized component wear. Its precision‑machined seat and sealing surface are manufactured at an offset angle, which distributes uniform contact load across the full circumference of the seat ring and eliminates rubbing friction between seat and seal during valve opening and throttling travel. Paired with a high‑performance laminated seal ring, this triple‑offset geometry delivers long‑service‑life, bi‑directional, bubble‑tight shut‑off, even for gaseous‑media operating conditions。
Technical Data
Pressure rating
Pressure Class Range: ANSI Class 150, 300, 600, 900, 1500
Body material
Seating Material: Laminated graphite/metal seat ring, solid metal seat.
Specifications
ASM
E B16.34 - Valves--Flanged, Threaded, and Welding End
API
609 - Butterfly Valves: Double-Flanged, Lug-and-Wafer Type
ISO
15848-1 - External leakage of valve stems
API
607 - Fire Test for Quarter-Turn Valves
ISO
10497 - Testing of valves -- Fire type-testing requirements