A351 CF8M Floating Ball Valve features a ball that is not supported by a fixed shaft but instead rests solely on two valve seats. The stem is dynamically connected to the ball, allowing it to remain in a floating state. Under medium pressure, the ball can shift slightly and press tightly against the sealing surface at the outlet end, ensuring reliable sealing performance.
When the handle (or other actuation device) rotates the stem, the ball rotates freely between the two valve seats. When the ball's passage aligns with the valve body's channel, the valve opens, allowing fluid flow. When the ball rotates 90°, the ball's passage becomes perpendicular to the valve body's channel, closing the valve. At this point, the ball is pushed against the outlet-side valve seat by fluid pressure, achieving a tight seal.
Specification
Design Standard: API 608, ISO 17292, API 6D
Structure: Two pieces body, Side Entry, Bolted Bonnet, Soft Seat
Nominal size: 1 Inch, DN25
Nominal class: 150 LB
Bore Type: Full Bore
End Connection: RF Flanged
Operation: Pneumatic Operation
Body Material: ASTM A351 CF8M
Trim Material: ASTM A182 F316, RPTFE/TFM 1600
Face to face: Manufacturer Standard
Test and inspection: API 598
Key Features: Anti-static Device, Fire Safe, Anti-Blowout Stem, Locking Device
Product Range:
Body material: Stainless Steel
Normal diameter: 1/2 - 8 Inch (DN15 - DN200)
Pressure range: Class 150 - 300 LB
End connection: RF, RTJ, SW, NPT, BW
Working temperature: -29℃ - +150℃
Operation: Lever, Spring Return Lever, Pneumatic Actuator
