Design V250 Rotary Control Valve
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The Design V250 Hi-Ball rotary control valve is designed for heavy-duty throttling and on-off applications.
Depending on size, this valve installs between two Class 600 or 900 pipeline flanges.
The Design V250 valve is available with a single ball seal, flow ring, or dual-seal construction. Single-seal constructions are used in tight shutoff applications;
the flow ring construction can satisfy higher temperature requirements.
The dual-seal construction, with a seal in the inlet and outlet openings, is used in bidirectional flow-shutoff applications. The Design V250 Hi-Ball valve is typically used for throttling and controlled flow applications in gas transmission lines, gas distribution, or liquid pipelines.
- High Pressure Drop Capabilities—Depending on the construction, a Design V250 valve is capable of a maximum static pressure differential of 103 bar (1500 psi) at 82°C (180°F) for Class 600, and 155 bar (2250 psi) for Class 900 constructions at 38°C (100°F) for LCC steel and CF8M (316 stainless steel).
- Tight Shutoff—Shutoff with the Design V250 ball seal is 0.0001 percent of maximum capacity.
- Efficient Operation—Tapered-polygon ball-to-shaft connection (see figure 5) and clamped splined actuator connection remove lost motion or deadband from the drive train for throttling control applications.
- Excellent Flow Control—Reduced ball port design provides a modified equal percentage flow characteristic and an excellent response characteristic.
- Greater Capacities—Design V250 ball valve construction offers greater capacities than conventional globe valves for both compressible and incompressible fluids.
- Sour Gas Trim Available—Corrosion resistant trim is available that adheres to the National Association of Corrosion Engineers (NACE) standard MR0175 guidelines for use in sour gas service.
- Longer Service Life—Pressure-balanced drive shaft design with PTFE-lined bearings and pressure-assisted shaft sealing arrangement provides for a long life of reliable service.
- Minimum Maintenance—Two-piece ball and shaft assembly allows for complete trim overhaul;parts replacement is kept to a minimum.
- Excellent Environmental Capabilities—The optional live loaded packing system is designed with very smooth shaft surfaces and live loading to provide excellent sealing.