Throttle Trip Valves
Principle of Operation
Fig. 8910, Fig. 8950 and Fig. 8995 Throttle Trip Valves provide effective flow control and emergency shut-off operation in a single, highly reliable valve assembly. As throttle valves, they are used to regulate flow of steam and gas in large, high-pressure pipe lines, such as the main steam line serving a large, high-pressure turbine or a turboexpander gas supply line. As trip valves, they add a measure of safety critical to these applications, without the expense of a separate trip valve. When tripped either manually or automatically, the valves rapidly shut down flow to protect valuable equipment.
S&K Throttle Trip Valves feature an internal pilot valve arrangement to relieve pressure on the main disc as the valve is opened. The seal-welded seat ring is shrink-fit to the body and includes an expansion groove, to prevent distortion of the seating face. Durable materials improve performance and reduce wear. Flexitallic-type gaskets provide positive sealing at all cover joints. Designed for simple on-line adjustment of the yoke and latching assembly. Optional ball bearing, threaded spindle and latching mechanisms are available to provide mechanical assist for reliable low-friction operation. Venturi seats can be provided in high-pressure applications, reducing space requirements and allowing use of smaller operators. Valves may be specified with welded ends or ANSI flange connections for direct connection to steam turbines.
||Steam turbine start-up and shut-down.
||Steam turbine emergency protection.
For more detailed information about Throttle Trip Valves, Bulletin 8C Literature.
To submit a Request for Quote (RFQ) for Throttle Trip Valves submit an online interactive General RFQ Form.