The triple offset butterfly valve boasts three unique offsets, with the third achieved by altering the sealing component's geometry. Specifically, the seat is precision-machined into an offset conical profile, forming a right-angled cone.

This innovative third offset minimizes rubbing and wear between the seat and seal ring during operation, ensuring the seal ring disengages from the valve seat seamlessly upon opening. Contact is only established at the final point of closure, where torque is applied to create a bi-directional, bubble-tight seal. This design earns triple offset butterfly valves the moniker "torque seated."

The metal-to-metal construction grants the valve resilience in high-temperature and high-pressure environments, outlasting double offset butterfly valves. However, achieving the precise oblique cone shape necessitates specialized machining, grinding, and assembly, driving up its cost compared to double offset models.

For applications involving high corrosion, abrasion, pressure, or temperature, the triple eccentric butterfly valve stands as a valuable option. It is frequently deployed in emergency safety operations, high-cycling services for superheated steam, high-pressure systems, or high-temperature gases and oils.

Range Specifications:
Sizes: 2" to 60" (DN50 to DN1500)
Pressure Ratings: ASME CLASS 150 to 900 (PN16 to PN150)
Temperature Range: -196°C to 600°C (-320°F to 1112°F)

Construction Features:

·Material: Cast Steel
·Seating: Metal Seated or Combined
·End Connections: Flanged, Wafer, Lug, Butt Welded (BW)
·Body Compositions: Monel, Inconel, Hastelloy, Incoloy, Duplex & Super Duplex Steels, Carbon Steel (including Low Temp), Low Alloy Steel, Stainless Steel, Titanium, etc.
Compliance & Standards:

·Design: MSS SP-67, API 609, EN 593, BS 5155, ISO 10631
·Flanged Ends: ASME B16.5
·Face-to-Face: ASME B16.10, EN 558, JIS B2002, MSS SP-72
·Mounting Pad: ISO 5211
·Pressure-Temperature Ratings: ASME B16.34
·Inspection & Testing: API 598, EN 12266, MSS SP-82, ISO 5208
·Fugitive Emission: ISO 15848, API 624, API 641
·Fire-safe: API 607, API 6FA, ISO 10497
Functionality:

·Bi-directional operation
·Bubble-tight shut-off capability