Triple Offset Butterfly Valve

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TR-SERIES

The SVS Corporation Triple Offset Butterfly Valve features an innovative design that offers reliability and durability.
Our high performance triple offset valve centerline design ensures long sealing life and provides bubble tight performance in high temperature, high pressure and firesafe application.

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Triple Offset Butterfly Valve

Standard Compliance

· Conform to API 609 in general.
· Fire Safe requirement meets BS 6755 part 2 / API 6FA
· Stellite overlay on body seat of valve is available to manufacture.

Production Range

· Size : DN 100 to DN 2000 ( 4 inch ~ 80 inch )
· Pressure : UP to 260 bar
· Temperature : -100℃ ~ +650℃ ( Depends on material )
· End connection : Wafer, Semi-lug, Lug, Double Flang

Connection Flange

· ISO 7005 PN2.5, PN6, PN10, PN16, PN20, PN50, PN100, PN150, PN260
· ASME B16.5 CL.150, CL.300, CL.600, CL.900, CL.1500, CL.2500
· AWWA C207 CL. D & E
· KS B 1511 & JIS B 2210 5K, 10K, 16K, 20K, 30K, 40K, 63K

Face to Face Dimention

· Conform to EN558, ISO 5752, MSS SP68, ASME B16.10 and API609, BS 5155

Application

· Fire safe line
· Steam line
· Nuclear power plants
· Exhaust gas line
· Petroleim plants
· Fossil power plants

SINGLE OFFSET

The centre of rotation is moved back from the centreline of the valve disc.
The seat and seal are designed conically and on centre.
This design relies on a frictional, interference seal and so is applicable only to soft seated valves.

DOUBLE OFFSET

The centre of rotation ins moved from the centerline of the valve body.
The seat and seal design remains conical and on centre.
This design again relies on a frictional, interference seal, but the length of rotation over which this friction occurs is reduced, allowing a larger range of process resistant seat materials to used.

TRIPLE OFFSET

The centreline of the cone is rotated away from the valve centreline resulting in an ellipsoidal profile and providing the third offset. With this geometry, seat seal interference is completely eliminated ensuring long sealing life. The result is a torque seated, process pressure aided FRICTIONLESS seal.

General Features

The centerline of the cone is rotated away from the valve centerline resulting in an ellipsoidal profile and providing the third offset. With this geometry, seat seal interference is completely eliminated ensuring long sealing life.
The result is a torque seated, process-pressure-aided frictionless seal.
The geometry allows the body seat to be used as the closed limit stop, aiding operator adjustment. The triple offset design is ideally suited to
metal seated valves providing bubble-tight performance in high temperature, high pressure and firesafe applications.