Self Sealing Gate Valve

Self Sealing Gate Valve Parameter Specifications Industry Applications

Self Sealing Gate Valve

Product Overview

The Self Sealing Gate Valve is designed for high-pressure and high-temperature applications where exceptional sealing performance and operational reliability are required. Utilizing a pressure self-sealing bonnet structure, the valve enhances sealing effectiveness as internal pressure increases, significantly reducing the risk of leakage under demanding service conditions.

Manufactured from premium forged or cast steel materials, the Self Sealing Gate Valve offers low flow resistance, full-bore flow passage, excellent shut-off capability, and long service life. It is widely used in power plants, petrochemical facilities, oil and gas systems, and other critical industrial applications.

OEM & Customization Capabilities

We provide comprehensive OEM and ODM services tailored to customer requirements:

Customized valve sizes and pressure ratings
Available in cast steel, forged steel, stainless steel, alloy steel, and special alloy materials
Custom end connections including flanged, butt weld, socket weld, and RTJ
Customized trim materials for high-temperature, corrosive, and erosive services
Electric, pneumatic, hydraulic, and gear-operated configurations available
Custom logos, nameplates, and packaging solutions
Optional bypass systems and locking devices
Fire-safe, low-emission, and cryogenic designs available
Surface treatment and anti-corrosion coating options

Certifications

Our Self Sealing Gate Valves can be manufactured and tested according to international standards:

ISO 9001 Quality Management System
API 600 Gate Valve Standard
API 602 Forged Steel Valve Standard
API 598 Inspection and Testing Standard
ASME B16.34 Design Standard
CE / PED Certification
ISO 5208 Pressure Testing Standard
API 607 Fire Safe Certification (Optional)
ISO 15848 Fugitive Emission Certification
NACE MR0175 / MR0103 Sour Service Compliance
SIL Certification (Optional)

Parameter Specifications

Parameter	Specification / Range
Valve Type	Self Sealing Gate Valve
Design Standard	API 600, API 602, ASME B16.34
Body Material	WCB, WC6, WC9, LCB, CF8, CF8M, F11, F22, F91
Gate Material	Stainless Steel, Alloy Steel, Hard-Faced Alloy
Seat Material	Stainless Steel, Stellite Overlay
Size Range	DN50 – DN1000 (NPS 2" – 40")
Pressure Rating	Class 600 – Class 2500
Connection Type	Flanged, Butt Weld, Socket Weld, RTJ
Bonnet Type	Pressure Self-Sealing Bonnet
Operating Temperature	-29°C to +650°C
Stem Type	Rising Stem
Operation Method	Handwheel, Gearbox, Electric Actuator
Leakage Standard	API 598
Fire Safe Design	Optional
Testing Standard	API 598, ISO 5208
Applicable Media	Steam, Water, Oil, Gas, Chemical Fluids

Industry Applications

Self Sealing Gate Valves are primarily used in high-pressure and high-temperature systems where reliable shut-off and leak-free performance are critical.

Power Generation

Main steam systems
Boiler feedwater pipelines
Superheated steam lines
Turbine auxiliary systems
Nuclear and thermal power plants

Oil & Gas Industry

Crude oil transportation systems
Natural gas processing facilities
Refinery process units
High-pressure pipeline networks

Petrochemical Industry

High-temperature chemical processing
Reactor inlet and outlet pipelines
Hydrocarbon transportation systems
Process isolation applications

Chemical Processing

Corrosive fluid handling
High-pressure chemical transfer systems
Utility and process pipelines

Metallurgical Industry

High-temperature gas pipelines
Industrial steam systems
Process control and isolation applications

Water & Industrial Utilities

High-pressure water transmission systems
Industrial utility networks
Pump station isolation systems

Key Advantages

Pressure self-sealing bonnet improves sealing performance under high pressure
Excellent reliability in high-temperature and high-pressure applications
Full-port design provides minimal flow resistance
Long service life with durable hard-faced sealing surfaces
Low maintenance requirements
Suitable for critical isolation service
Fire-safe and low-emission designs available
Compatible with manual and automated operation systems
Meets major international standards and certification requirements for global projects

CUSTOMIZED SERVICE Customized Product

Material customization plan

Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.

Structural optimization design

For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.

Interface standard adaptation

Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.