{"id":1416,"date":"2025-12-10T02:07:47","date_gmt":"2025-12-10T02:07:47","guid":{"rendered":"https:\/\/stvvalve.com\/gate-valves-design-standards-certifications\/"},"modified":"2025-12-10T02:13:03","modified_gmt":"2025-12-10T02:13:03","slug":"gate-valves-design-standards-certifications","status":"publish","type":"post","link":"https:\/\/stvvalve.com\/es\/gate-valves-design-standards-certifications\/","title":{"rendered":"Gate Valves \u2014 Design Standards & Certifications"},"content":{"rendered":"
\"

China Flexible Wedge Cast Steel Gate Valve supplier<\/p><\/div>\n

Gate valves<\/a> and gate valve assemblies engineered for pipeline and process applications, designed to provide reliable on\/off closure with minimal pressure drop when fully open. These valves meet major international design, testing and connection standards for oil & gas, petrochemical, water and industrial services.<\/p>\n

-Design: ASME 16.34\/ API 6D\/ API 600\/ BS 1414<\/p>\n

-Face to Face: ASME B16.10<\/p>\n

-End Flange: ASME B16.5, ASME B16.47<\/p>\n

-BW End: ASME B16.25<\/p>\n

-Test: API 598\/ API 6D\/ BS 6755<\/p>\n

-Special: NACE MR-01-75<\/p>\n

Notes & verification guidance: API 598 refers to pressure and seat leakage testing; ASME B16.10 covers face-to-face dimensions for common pressure classes; ASME B16.5\/B16.47 and B16.25 specify flange and butt-weld end connections by size and class. NACE MR-01-75 indicates sour-service material considerations. Certificate copies, API monogram evidence (API 600 Edition 13) and specific test reports (for pressure, fugitive emissions and fire-safe testing) are available upon request to verify compliance for a given valve configuration.<\/p>\n

Quick links: Download datasheet<\/a> | Request certificates<\/a> | Contact sales<\/a><\/p>\n

Design Features & Construction<\/h2>\n

Our gate valves are engineered for reliable on\/off service across pipeline and process applications. The design focuses on robust closure performance when fully closed and minimal pressure drop when fully open, with multiple construction options to match fluid, pressure and temperature requirements.<\/p>\n

Design Features<\/p>\n

-OS & Y, Rising stem<\/p>\n

\u2013 Bolted Bonnet with spiral-would gasket<\/p>\n

-Flexible Wedge<\/p>\n

-Backseat Weld-Deposited<\/p>\n

-Threaded or welded seat ring<\/p>\n

-Renewable seat rings<\/p>\n

-Extended Bonnet for Cryogenic Service<\/p>\n

-Flanged or butt welded ends.<\/p>\n

-By Pass on Request<\/p>\n

-Locking Device Optional<\/p>\n

Operation & Stem<\/h3>\n

OS&Y (outside screw and yoke) rising stem design provides a clear visual indication of valve position and simplifies maintenance of packing and seals. Rising stems reduce the risk of debris buildup at the stem and make manual actuation predictable for large valves used in pipeline and isolation duties. Threaded stem or alternative stem configurations are available for automated or space-constrained installations.<\/p>\n

Bonnet, Packing & Sealing<\/h3>\n

Bolted bonnet construction with a spiral-wound gasket is specified for high-pressure and high-temperature service to ensure reliable sealing of the valve body. Backseat features (weld-deposited) protect the stem packing during full closure. Packing and seal options are available to meet fugitive emissions standards (API 624 \/ ISO 15848-1) \u2014 specify when tight sealing and emission control are required.<\/p>\n

Gate \/ Wedge & Seat Construction<\/h3>\n

Flexible wedge design accommodates minor misalignment and differential thermal expansion, improving sealing life and reducing seat wear compared with rigid wedges. Threaded or welded seat rings make maintenance straightforward\u2014renewable seat rings allow in-line replacement of seating surfaces to extend valve life. Hardfaced body guides and wedge slots (offered for sizes >24″) and Inconel overlay\/cladding options address erosive or high-temperature fluids where extra protection is needed.<\/p>\n

Cryogenic & Special Service<\/h3>\n

Extended bonnet variants are available for cryogenic service (e.g., LNG) to keep packing and actuation components above the low-temperature path and preserve sealing performance at temperatures down to -196\u00b0C. Material selection (stainless, duplex or special alloys) and packing choices are critical \u2014 specify service conditions to ensure correct configuration.<\/p>\n

End Connections & Accessories<\/h3>\n

Flanged or butt-welded ends are available to match pipeline and plant flange standards. Optional bypass valves, locking devices and actuation interfaces (manual, gearbox, pneumatic\/electric actuators) let you integrate the gate valve into automated systems that require SIL 3-capable performance. For restricted spaces, specify compact actuators or non-rising stem options.<\/p>\n

Performance, Tests & Proven Design<\/h3>\n

The stem\u2013wedge connection has been validated against API RP 591 Annex B (robust connection for reliable motion). Valves can be supplied with testing to API 598 (pressure and seat leakage) and additional qualification such as API 624 fugitive-emissions testing and fire-safe evaluation to API 607 \/ ISO 10497 where required \u2014 test reports and certificate copies are available on request. Specify required acceptance tests at order.<\/p>\n

Benefits & Selection Guidance<\/h3>\n