Spring-Loaded Full-Lift Safety Valve

The Spring-Loaded Full-Lift Safety Valve is an industrial pressure relief device designed to protect equipment and systems from overpressure conditions. When system pressure exceeds the set value, the valve opens immediately and transitions into full-lift operation, allowing high-capacity discharge of process media to prevent equipment failure and ensure operational safety.
It is widely used in critical process industries where reliable pressure protection is essential for continuous and safe operation.

This safety valve is engineered for demanding operating environments where pressure fluctuation, thermal cycling, and continuous duty operation are common.
Typical applications include:

• Refinery process units with unstable operating pressures
• LNG storage and cryogenic transfer systems
• Steam boiler protection systems in power generation plants
• Chemical processing and reactor overpressure protection systems

In these conditions, challenges such as pressure surges, valve chatter, and thermal stress require stable performance, fast response, and reliable reseating behavior.

The valve operates based on the balance between spring preload force and system pressure.
When system pressure reaches the set value, the disc lifts rapidly. After reaching the critical lift point, the valve enters full-lift mode, providing maximum flow capacity for rapid pressure relief. Once system pressure drops to a safe level, the spring force reseats the disc to ensure tight shutoff and system integrity.

• Full-lift design ensures maximum discharge capacity during emergency conditions
• Stable set pressure performance under long-term cyclic operation
• Anti-chatter structure improves stability under fluctuating pressure conditions
• High sealing integrity with low leakage performance
• Suitable for gas, steam, and liquid applications
• Wide pressure and temperature adaptability
• High fatigue-resistant spring design for extended service life
• Custom material options for corrosive and high-temperature environments

• Body: Carbon Steel / Stainless Steel / Alloy Steel
• Disc: Stainless Steel / Stellite hard-faced (optional)
• Spring: High-strength alloy steel with anti-corrosion coating
• Seat: Stainless Steel / Stellite overlay
• Bonnet: Carbon Steel / Stainless Steel

All valves are manufactured under ISO 9001 quality management systems and undergo 100% inspection prior to shipment, including:

• Hydrostatic pressure testing
• Seat leakage testing
• Set pressure calibration
• Functional performance verification

Third-party inspection services such as SGS, BV, and TUV are available to meet international EPC and industrial project requirements.

• Oil & Gas production and refining systems
• Petrochemical and chemical processing plants
• LNG and cryogenic installations
• Power generation and boiler systems

Industrial pressure vessels and pipeline systems

• Install vertically on protected equipment
• Ensure inlet piping is clean and free from obstruction
• Regular calibration is recommended for stable long-term operation
• Periodic inspection ensures sealing reliability and safety performance

We provide engineered valve solutions designed for safety, reliability, and international project compliance.

• OEM / ODM customization available
• Engineering response within 24 hours
• Stable export supply capability for EPC and industrial projects
• Strict quality control with full inspection before shipment
• Technical support for valve selection and system integration

• MOQ: 1 set for evaluation
• Lead Time: 2–4 weeks for standard models
• Packaging: Export-grade wooden case suitable for sea freight
• Shipping: Global delivery available
• RFQ Response Time: within 12–24 hours

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