API 609 Category B
Butterfly Valve, Wafer End, 2-1/2 Inch/DN65, 150 LB, Lever Operation.
| 1862160 High-Performance Butterfly Valve |
| Design Standard: |
API 609 Category B, EN 593 |
| Structure: |
Double Offset, Double Eccentric |
| Nominal Size: |
2-1/2 Inch, DN65 |
| Nominal Class: |
Class 150 LB, PN16 |
| Body Material: |
ASTM B148 C95800, ASTM A351 CF8, ASTM A351 CF8M, ASTM A890 4A, ASTM A216 WCB, ASTM A890 5A, Titanium. |
| Seat Type: |
Soft Seat |
| Face to Face: |
API 609, EN 593 |
| Operation: |
Lever |
| Seat: |
RPTFE, PPL |
| End Connection: |
Wafer |
| Test and Inspection: |
API 598, API 609 |
| Trim Material: |
ASTM A351 CF8, ASTM A351 CF8M, ASTM A890 4A, ASTM A890 5A, ASTM B148 C95800, Titanium |
| Key Features: |
Long working life for frequent operation (million cyclings), Lower torque, Replaceable seat, Tight sealing, Excellent control characteristics, Bi-direction sealing under full pressure, fire safe seat available. |
Body Material: Carbon Steel, Stainless Steel, Duplex Steel, Aluminum Bronze, Titanium
Normal Diameter: 1/2 - 48 Inch (DN15 - DN1200)
Pressure Range: CL 150 - 300 LB
Operation: Manual (lever, gear), Pneumatic Actuator, Motor Actuator
Working Temperature: -26°C - +120°C (180°C for PPL seat)
End Connection: Wafer, Lug, Flanged
Compared to other valve types, double eccentric butterfly valves offer clear advantages in cost and space efficiency, with a broader size range. They provide faster operation, less restriction, and minimal wear between the disc and seat sealing surface, ensuring a longer service life and reduced total cost of ownership. The two offset design allows for lower torque and extended cycling life, making it ideal for frequent operation. Bosseal's high-performance butterfly valves have passed a million-cycle test, ensuring durability.
Main Features
The shaft centerline is positioned behind the disc centerline, reducing contact between the disc and seat before full closure, allowing continuous engagement of the seating surface.
The shaft centerline is offset from the valve and pipe centerline. This design allows the disc seal to quickly disengage from the seat upon opening, significantly reducing friction and wear on the sealing surfaces.
With shorter face to face and light design, it’s very space saving for piping design compared to other valve types.
