Product Name: Triple Offset Butterfly Control Valve
Structure: Triple Offset
Body Material: ASTM A351 CF8M
Size: 8 Inch, DN200
Pressure: Class 150 LB, PN20
End Connection: RF Flanged
Actuation: Pneumatic Actuator
Medium: Oil
Flow Characteristics: Approximate Equal Percentage
Product Range
Standard: ASME, DIN, JIS, GB, etc
Body Material: ASTM A216 WCB, ASTM A351 CF8, CF8M
Size Range: 3-24 Inch, DN80-DN600
Pressure Rating: PN10-PN110, Class 150-600 LB
Working Temperature: -196°C to +500°C
Rangeability: 25:1 (60 Degree Opening); 50:1 (90 Dgree Opening)
End Connections: Flnaged
Leakage Class: ANSI B16.104 Class VI
Actuator Options: Pneumatic Cylinder Actuator, Electronic Actuator, Pneumatic Diaphragm Actuator
Triple Offset Butterfly Control Valve Features
The triple offset butterfly control valve is an innovative design that offers a high level of sealing performance and reliability in various industrial applications. Here's a detailed explanation of its unique geometry and the benefits it provides:
Offset 1 - Shaft Offset Behind the Seat Axis: This design feature allows the butterfly disc to make complete sealing contact around the entire seat circumference. The offset ensures that the disc and seat come into contact only at the final stages of closure, providing a bubble-tight shut-off without the need for excessive torque.
Offset 2 - Shaft Centerline Offset from the Pipe: By offsetting the shaft centerline from the centerline of the pipe and valve body, the valve is able to open and close without any interference. This offset allows for smooth operation and reduces the wear and tear on the sealing surfaces, extending the valve's service life.
Offset 3 - Seat Cone Axis Offset from the Shaft Centerline: The seat cone, which is the part of the valve that comes into contact with the butterfly disc, is also offset from the shaft centerline. This design minimizes friction during the opening and closing process, ensuring a uniform compressive seal around the entire seat. The "wedging" action generated by this offset helps to maintain a consistent seal even under fluctuating pressure conditions.
