Yoke
The structural frame connecting the valve body to the actuator or handwheel. On OS&Y gate valves, the yoke carries the stem nut and provides the mechanical support for multi-turn operation. On actuated valves, the yoke or bracket transfers actuator forces to the valve body.
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Frequently Asked Questions
What is a Yoke in a valve?
The structural frame connecting the valve body to the actuator or handwheel. On OS&Y gate valves, the yoke carries the stem nut and provides the mechanical support for multi-turn operation. On actuated valves, the yoke or bracket transfers actuator forces to the valve body.
What materials are used for the Yoke?
Yoke material selection depends on the process fluid, operating temperature and pressure, and required corrosion resistance. Standard materials include carbon steel (A216 WCB/A105), austenitic stainless steel (SS316/316L), and corrosion-resistant alloys (Hastelloy C-276, Inconel 625, duplex stainless steel 2205/2507) for aggressive service. All materials must be certified with EN 10204 Type 3.1 MTCs traceable to the heat number.
What standards govern the design of the Yoke?
Valve component design is governed by ASME B16.34 for pressure-temperature ratings, API 600/602 for gate valves, API 609 for butterfly valves, and API 6D for pipeline valves, as applicable. Third-party inspection to these standards ensures compliance. Vajra Industrial Solutions supplies valves with full documentation packages including dimensional inspection records and material certificates.
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