Spring Micro-opening Closed Safety Valve

Our Spring Micro-opening Closed Safety Valve adopts a spring-loaded design, which realizes precise control of opening and closing pressure through the dynamic balance between spring preload and medium pressure. The "micro-opening" feature means that the lifting height of the valve disc is usually 0.5–3 mm, which is less than 1/20 of the throat diameter of the valve seat, making it especially suitable for the discharge of compressible media such as gas and steam. The fully closed structure effectively prevents medium leakage, avoids environmental pollution and safety hazards, and is the ideal choice for occasions involving toxic, flammable, corrosive or valuable media.

With advanced manufacturing technology and strict quality control, the product complies with international standards such as ISO 5208 Class A, API 527 Class VI and ASME, and has passed multiple authoritative certifications to ensure stable performance and reliable quality in long-term operation, meeting the strict safety requirements of global industrial customers.

1.Precision Pressure Control : Adopts high-quality alloy spring (50CrVA or Inconel X-750), which can accurately set the opening pressure by adjusting the spring preload. The preload attenuation is controlled within 3% even under long-term high-temperature operation, ensuring that the valve opens and closes at the preset pressure, with an error of ≤±2%, reducing unnecessary medium loss.

2.Superior Sealing Performance : The valve disc and valve seat adopt Stellite hard alloy sealing surface, combined with laser texturing conical surface sealing and self-compensation structure, which achieves zero leakage standard, and the leakage rate is stably controlled within ISO 5208 Class A (≤0.01 mL/min). The average sealing life can reach more than 8,200 hours, effectively avoiding medium leakage and safety risks.

3.Fully Closed Structure : The integral closed design can completely seal and recover the medium, which is suitable for toxic, flammable, corrosive and other special media, protecting the environment and operators, and complying with global environmental protection and safety regulations.

4.Stable & Durable Performance : The valve body is made of high-quality materials such as WCB carbon steel and 1Cr18Ni9Ti stainless steel, which has strong corrosion resistance, high temperature resistance and pressure resistance. It can work stably in the temperature range of -20℃ to 450℃ and the pressure range of PN16-PN100, adapting to various harsh industrial working conditions.

5.Anti-Frequency Jump Design : Optimize the valve disc guide gap to 0.05–0.10 mm, and adopt hard alloy sealing surface to reduce the frequency jump rate of the valve disc to below 9%, avoid valve damage caused by high-frequency vibration, and extend the service life of the product.

6.Easy Installation & Maintenance : Compact structure, optimized height and diameter ratio, suitable for narrow installation space. It supports flange and thread connection (G, NPT and other specifications), which is convenient for on-site installation and replacement. It is equipped with an adjustment screw and a test lever, which can realize manual verification without shutting down the machine, reducing maintenance cost and downtime.

7.Intelligent Upgrade Option : It can be equipped with online monitoring modules such as optical fiber sensing, pressure sensor and displacement feedback device, realizing real-time monitoring of opening and closing status and AI fault early warning, helping you realize predictive maintenance and improve operation efficiency.

- Chemical Industry : Chemical reaction kettles, storage tanks, delivery pipelines, used for overpressure protection of corrosive, flammable and toxic media such as petrochemicals, chemicals and liquid ammonia.

- Power Industry : Boilers, pressure vessels, steam pipelines, ensuring the safe operation of thermal power and nuclear power systems.

- Pharmaceutical & Food Industry : Pharmaceutical sterilization systems, food processing equipment, ensuring the safety and hygiene of production processes, and avoiding medium pollution.

- New Energy Field : Hydrogen storage and transportation systems, LNG storage tanks, supercritical CO₂ equipment, adapting to the special working conditions of new energy media.

- Manufacturing Industry : Compressors, pneumatic systems, hydraulic equipment, pressure regulating and safety protection of various mechanical equipment.

- Municipal Engineering : Tap water treatment, gas transmission pipelines, emergency pressure relief of public facilities.

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