Pressure Sealed-Wedge Gate Valve

Designed for high-pressure and high-temperature isolation, the Pressure Sealed-Wedge Gate Valve combines a pressure-assisted sealing system with a wedge gate configuration to provide secure shut-off in high-energy process lines. As line pressure increases, the internal pressure acts on the pressure-seal arrangement to enhance sealing force, while the wedge gate establishes firm contact with the valve seats for positive isolation. This construction is particularly advantageous where conventional bolted-bonnet designs face demanding pressure and temperature conditions.

The Pressure Sealed-Wedge Gate Valve is particularly suited for power generation, steam systems, oil & gas, petrochemical, refinery, and other high-energy applications. Its pressure-sealed bonnet, full-port flow passage, and durable wedge-and-seat arrangement provide an effective solution for main steam, boiler feedwater, superheated steam, and other critical process services.

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Technical Specifications

Product description:	Pressure Sealed-Wedge Gate Valve
Model:	Z540H-Pressure Sealed-Wedge Gate Valve
Nominal diameter:	NPS 2”～48”
Operating temperature:	-196℃～593℃(the range of service temperature may vary for different materials)
Nominal pressure:	CLASS 600～2500
Material:	Main material: A216 WCB、WCC; A217 WC6、WC9、C5、C12、C12A、CA15; A351 CF8、CF8M、CF3、CF3M、CF8C、CN3MN、CK3MCUN、CN7M; A352 LCB、LCC; A494 CW-6MC、CU5MCuC、M35-1; A890 4A(CD3MN)、5A(CE3MN)、6A(CD3MWCuN); ASME B 148 C95800、C95500, etc.
Design standard:	ASME B16.34、API 600、GB/T 12234、GB/T 12224
Structural length:	ASME B16.10、GB/T 12221
Connecting end:	ASME B16.5、ASME B16.47、ASME B16.25、GB/T 9113
Test standard:	API 598、ISO 5208、GB/T 26480、GB/T 13927
Operation method:	non-elevating hand wheel, bevel gear, motor drive unit, pneumatic drive unit
Application fields:	For application in fields such as electric power industry, petroleum, tap water engineering in urban construction, chemical engineering, etc.

Features & Benefits

Heavy-duty isolation valve providing full-bore flow with minimal pressure loss.

Pressure-Assisted Sealing

Internal line pressure reinforces the bonnet seal, providing increasing sealing force as system pressure rises.

Wedge Gate Configuration

The wedge establishes firm contact with the seats to provide positive isolation and dependable shut-off.

High-Pressure Capability

Pressure-seal construction is well suited to high-pressure applications where secure pressure containment is essential.

High-Temperature Performance

Suitable for elevated-temperature steam and process media with appropriately selected body, packing, and trim materials.

Full-Bore Flow Path

The gate retracts completely from the passage when open, allowing efficient flow with minimal pressure loss.

Reduced External Leakage Risk

The pressure-seal bonnet reduces reliance on conventional bonnet gaskets and supports improved pressure-boundary integrity.

Strong Pressure Boundary

The body and bonnet arrangement is engineered to withstand high mechanical and thermal loads encountered in high-energy systems.

Durable Seat & Gate Materials

Seat and gate surfaces can be selected or hardened to withstand erosion, temperature cycling, and demanding service conditions.

Low Flow Resistance

The unobstructed passage is advantageous for steam and process lines where maintaining system efficiency is important.

Suitable for Critical Steam Systems

Well suited to main steam, superheated steam, boiler feedwater, turbine systems, and other high-pressure power and process applications.

Application Scenario

Chemical Industry

Ball valves, butterfly valves, gate valves, globe valves, check valves, and control valves ensure safe fluid isolation, precise process control, and reliable operation in demanding chemical processing applications.

Oil Industry

Engineered for reliable isolation, flow regulation, and backflow prevention, our valve solutions support upstream, midstream, and downstream oil production and refining operations.

Natural Gas

Providing leak-tight sealing, dependable flow control, and safe pipeline operation for natural gas transmission, storage, LNG, and distribution systems.

Metallurgy

Built to withstand high temperatures, abrasive media, and harsh operating conditions in steelmaking, smelting, and metallurgical processing.

Power Generation

Ensuring reliable isolation, accurate flow control, and long-term performance in steam, boiler, turbine, and power plant systems.

Pharmaceutical

Delivering hygienic, precise, and contamination-free flow control for pharmaceutical manufacturing and clean process applications.

Steel Industry

Designed for high-temperature, high-pressure, and severe-service conditions in iron making, steelmaking, rolling mills, and auxiliary process systems.

New Energy

Supporting hydrogen, LNG, carbon capture, battery materials, and renewable energy projects with advanced valve solutions for safe and efficient process control.