1. General Introduction
Fisher Vee-Ball control valve unrestricted straight-through flow design provides high capacity for gas, steam, liquids, and fibrous slurries, it covers the DN 25 to 600 (NPS 1 to 24 inch) V150, V200 and V300 Vee-Ball control valves. The Vee-Ball valve combines globe valve ruggedness with the efficiency of a rotary valve. The Vee-Ball valve is a segmented ball valve which features a contoured segmented V-Notch ball. A shearing action between the V-notch ball and the ball seal promotes smooth, no clogging operation. V150 offers flange connection with class 150#, V200 offers wafer connection with class 150#, 300# and 600#, V300 valves offers flange connection with class 300# which mate with a variety of ASME raised face flanges, as well as with EN flanges connection. It mainly come with typical features as below:
Smooth Valve Operation: Precision machined parts and pressure balanced seal designs allow smooth, precise movement of the ball.
Excellent Flow Control: Precise contouring of the Vee-Ball provides a modified equal percentage flow characteristic. For very precise control of low flow rates, the Micro-Notch option is available on the NPS 1 valve.
Sour Service Capability: Materials are available for applications involving sour liquids and gases. These constructions comply with NACE MR0175-2002,MR0175-2003, MR0103, and MR0175/ISO 15156.
Long Service Life: The solid HD ball seal construction provides long service life in demanding applications. The constant wiping action of the seal across the ball's sealing surface prevents scale and sludge buildup, and provides excellent service on steam, gases, slurries, and various liquid applications.
2. Specification of Fisher Vee-Ball valve
Specifications | V150 | V200 | V300 |
Valve Body Size | NPS 1 to 20 inch | NPS 1 to 10 inch | NPS 1 to 20 inch |
End Connections | Flanged valves that mate with CL150 raised-face flanges and EN 1092-1 Type B raised-face and Type F Recess | Flangeless (all sizes) and flanged valves that mate with CL600 raised-face flanges (NPS 2-8) | Flanged valves that mate with CL300 raised-face flanges and EN 1092-1 Type B raised-face and Type F Recess |
Flow Characteristic | Modified equal percentage | ||
Standard Flow Direction | Forward (into the convex face of the V-notch ball) | ||
Maximum Ball Rotation | 90 degrees | ||
Actuator Mounting | Standard actuator mounting is on the right-hand side, as viewed from the valve inlet. The standard ball design and actuator action is counter-clockwise to close (CCW) so the ball will rotate to the top of the valve body when open for a horizontal pipe run with the valve shaft positioned horizontal. Left-hand actuator mounting with CCW action is an option. Left-hand (optional) actuator mounting with a special clockwise to close (CW) ball design and actuator action is also available to allow the ball to rotate to the top of the valve body. | ||
Actuator Action | With diaphragm or piston rotary actuator, the valve is field-reversible between PDTC or PDTO: push-down-to-close (extending actuator rod closes valve) and push-down-to-open (extending actuator rod opens valve) | ||
3. Selection table of Fisher Vee-Ball valve
4. Section drawings for Fisher Vee-Ball valve
