High-Pressure Gate Valve

We are a certified valve manufacturer with ISO and API credentials, equipped with precision production lines and strict full-range QC including API 598 hydrostatic tests. OEM and ODM customizations are available with flexible MOQ for trial and bulk orders. Our heavy-duty high-pressure gate valves are shipped globally and highly praised by engineering clients.

What kinds of working scenarios can these high-pressure gate valves adapt to?

They act as full-bore isolation cut-off equipment for high-pressure pipelines, extensively used in oil & gas transportation, thermal power plants, chemical refineries and high-temperature steam lines. They fully open or fully close flow for pipeline maintenance and emergency shut-off.

Key Attributes

Is this type of gate valve suitable for throttling or pressure adjustment work?

Absolutely not. These gate valves are designed purely for on-off isolation. Partially opening the valve will lead to severe erosion of the hard-alloy wedge sealing surface by fast-flowing medium, resulting in permanent leakage. Special regulating valves are required for pressure reduction and flow control.

What raw materials go into manufacturing these high-pressure gate valves?

Body & bonnet: Cast A216 WCB, forged A105, low-temperature A350 LF2 carbon steel

Valve stem: A182 F304, A182 F316 or 13Cr stainless steel

Wedge disc: Carbon steel substrate with Stellite hard surfacing

Seat faces: Stellite / Inconel hard alloy

Sealing gaskets: RTJ metal ring gaskets, graphite spiral wound gaskets

In high-pressure pipeline service, what advantages make high-pressure gate valves a better choice compared with ball valves and butterfly valves?

First, their full straight through bore brings nearly zero flow resistance; ball valves have trapped cavities and butterfly valves have internal disc obstructions that create extra pressure loss.

Second, the all-metal hard seal wedge structure can bear ultra-high Class 2500 pressure and high temperature, while soft-sealed ball and butterfly valves will fail under extreme thermal and pressure loads.

Third, thick heavy-wall bodies and optional welded bonnets eliminate leakage risks, which floating ball and wafer butterfly valves cannot resolve for critical high-pressure flammable medium pipelines.

Fourth, they support API 6D fire-safe certification, a mandatory safety standard that most butterfly valves cannot meet.

What core structural designs distinguish a standard high-pressure gate valve?

Full through-conduit straight bore to cut down flow loss

Solid or split wedge coated with Stellite alloy for bubble-tight metal-to-metal sealing

Thick-wall cast/forged carbon steel body, bolted or pressure-resistant welded bonnet

RTJ metal ring flange gaskets for reliable high-pressure sealing

Multi-layer backseat stem seal to stop external medium leakage

Fully compliant with API 6D, ASME B16.34, passing API 598 hydrostatic and fire-safe tests

Multiple drive options: handwheel, gear box, electric, pneumatic or hydraulic actuator