Gate Valves — Design Standards & Certifications

Gate valves 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.

-Design: ASME 16.34/ API 6D/ API 600/ BS 1414

-Face to Face: ASME B16.10

-End Flange: ASME B16.5, ASME B16.47

-BW End: ASME B16.25

-Test: API 598/ API 6D/ BS 6755

-Special: NACE MR-01-75

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.

Quick links: Download datasheet | Request certificates | Contact sales

Design Features & Construction

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.

Design Features

-OS & Y, Rising stem

– Bolted Bonnet with spiral-would gasket

-Flexible Wedge

-Backseat Weld-Deposited

-Threaded or welded seat ring

-Renewable seat rings

-Extended Bonnet for Cryogenic Service

-Flanged or butt welded ends.

-By Pass on Request

-Locking Device Optional

Operation & Stem

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.

Bonnet, Packing & Sealing

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) — specify when tight sealing and emission control are required.

Gate / Wedge & Seat Construction

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—renewable 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.

Cryogenic & Special Service

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°C. Material selection (stainless, duplex or special alloys) and packing choices are critical — specify service conditions to ensure correct configuration.

End Connections & Accessories

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.

Performance, Tests & Proven Design

The stem–wedge 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 — test reports and certificate copies are available on request. Specify required acceptance tests at order.

Benefits & Selection Guidance

• Reliable closure and low flow resistance when fully open — suitable for isolation and on/off service in pipelines and process plants.
• Renewable seats and replaceable trims reduce lifecycle maintenance and downtime.
• Material and sealing options tailor valves to water, hydrocarbon, corrosive or high-temperature fluids.
• Options such as hardfacing and Inconel cladding protect the valve body and gate path in abrasive or erosive services.

Want detailed specs or QA documentation? Request the materials matrix | Request test reports | Contact technical sales

Product Range & Materials

Available gate valves cover a broad selection of sizes, pressure classes and materials to suit pipeline and process applications — from water and utility services to demanding oil & gas and cryogenic systems. Choose the correct valve body, trim and sealing options based on fluid, temperature and maintenance needs.

Product Range

-Valve size:

2″ ~ 48″ (DN50-DN1200)

-Pressure:

ANSI Class 150~2500(PN16-PN420)

-Temperature:

-196ºC~ 500ºC

-Body Materials:

Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel

-Trim (Disc/Stem):

Carbon Steel, Stainless Steel, Duplex Steel, Alloy Steel

Sizing & Pressure Guidance

Standard sizes run from 2″ to 48″ (DN50–DN1200). Pressure classes span ANSI 150 up to ANSI 2500 (approx. PN16–PN420). Not all materials or designs are available in every size/pressure combination—confirm the required size, pressure and application at inquiry to ensure the selected gate valve design meets mechanical and sealing requirements.

Temperature & Material Selection

Temperature capability ranges from cryogenic (down to -196°C with extended bonnet and appropriate packing) up to 500°C depending on body and trim materials. Carbon steel is commonly used for general service, stainless and duplex steels for corrosive fluids, and alloy or cladded trims (Inconel overlay available) for erosive, high temperature or special chemical services.

Selection Notes & Typical Applications

– Typical applications: pipeline isolation, pump station isolation, refinery and petrochemical on/off duties, cryogenic storage and transfer lines, and industrial water systems.

– For abrasive or erosive fluids, specify hardfaced guides, wedge slots or Inconel-clad trims to protect the gate and valve body path.

– For strict emissions or safety requirements, request API 624 packing options, fire-safe construction and relevant certificates.

Maintenance & Installation Considerations

Large gate valves require appropriate lifting and piping support; consider space for gearbox or actuator motion (rising stem height) and service access. Renewable seat rings and replaceable trims simplify maintenance and reduce downtime—disclose expected service intervals and media characteristics to optimize material and seal choices.

Ordering & Support

Specify size, pressure class, temperature, body & trim materials, end connections (flanged or butt-weld), actuation and required test/certificate scope at order. For documentation and validation: Request datasheet | Request certificate | Get a quote