The A47H spring-loaded micro-opening safety valve with a wrench is a spring-loaded micro-opening safety valve equipped with a manual test wrench. The "H" represents that the sealing surface is made of alloy steel. When the system pressure exceeds the set value, the valve opens slightly to release pressure; it automatically closes after the pressure recovers. The manual wrench is used for regular functional testing, forcibly lifting the valve disc to verify its operational flexibility, preventing adhesion and jamming due to long-term stagnation, and ensuring reliable operation in emergency situations. It is an ideal choice for applications where there is a need for active verification of the reliability of safety valves. It is widely used in industrial boilers, pressure vessels, compressed air systems, hydraulic stations, heat exchangers, and general chemical equipment, where regular functional testing of safety valves is required to ensure their reliability. It serves as an important active maintenance-type overpressure protection device.

A47H Manual Lever Spring-Loaded Low-Lift Safety Valve Product Diagram

Features:

1. The top of the manual test wrench valve is equipped with a wrench, which allows for regular manual lifting tests. Without the need for system pressure increase, it is possible to check whether the valve disc moves flexibly, which is a key function for preventive maintenance.

2. The spring-loaded micro-opening structure utilizes a direct-loaded spring and a micro-opening valve disc, featuring a small opening height, moderate discharge capacity, and rapid and smooth opening and closing actions. It is suitable for applications involving liquids or where small discharge capacity is required for pressure relief.

3. The sealing surface between the alloy steel hard seal ("H" type) valve disc and valve seat is made of alloy steel (such as 13Cr) through build-up welding, featuring high hardness, wear resistance, high temperature resistance, reliable sealing performance, and long service life.

4. Compact structure and adjustable pressure. The overall design is compact. By adjusting the screw, the spring preload can be adjusted within a certain range, thus precisely setting the opening pressure (set pressure).

5. Wide applicability and high reliability. It is suitable for various media such as saturated steam, air, water, and oil with operating temperatures up to 300℃. Regular wrench testing greatly enhances the reliability of the valve for long-term standby use.