API 600 Gate Valves Description
API 600 gate valve is an industrial valve that complies with the API 600 standard of the American Petroleum Institute. It is designed for high temperature, high pressure and harsh media conditions, and uses a wedge-type sealing structure to achieve reliable cutting. Its core components, specifications and characteristics are as follows:
Wedge gate: single gate or double gate structure, the sealing surface is at a wedge angle with the pipeline axis, and the valve seat is pressed by the medium pressure to achieve bidirectional sealing when closed.
Valve seat: replaceable carbide sealing surface (such as Stellite alloy cladding), wear-resistant and corrosion-resistant.
Bolted valve cover: Class 600 and below use bolts + spiral wound gasket sealing.
Self-sealing valve cover: Class 900 and above use internal pressure self-tightening sealing ring (SS + flexible graphite), which is more reliable under high pressure.
Upper sealing structure: prevent the medium from leaking to the stuffing box when the valve is opened.
Valve stem design: Rising stem bracket type (OS&Y), surface nitriding treatment for wear resistance, with anti-flying shoulder.
Packing system: Flexible graphite + braided graphite combination, supports online replacement.
API 600 Gate Valves specification
· Design and Manufacture conform to API 600
· Flange dimensions conform to ASME B16.5
· Face to Face dimensions conform to ASME B16.10
· Testing conform to API 598
API 600 Gate Valves
High-pressure steam pipelines: Power plant boiler main steam cut-off (Class 600 and above).
Sulfur-containing oil and gas pipelines: Sulfur-resistant materials (such as F22) resist sulfidation stress cracking.
Highly corrosive media: Acid and alkali pipelines (with stainless steel/alloy valve bodies).
Hydrogen working conditions: High-pressure hydrogen control of hydrogenation units (self-sealing valve cover to prevent leakage).
Slurry transportation: Coal chemical industry particle-containing fluid cut-off.
Ultra-low temperature system: LNG storage and use of cryogenic gate valves (-196℃).
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