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What is the role of installing a stainless steel spring in a safety valve?

What is the role of installing a stainless steel spring in a safety valve?

(Summary description)Many safety valves are equipped with stainless steel springs. By using the spring's purpose and elasticity, it is better to control the safety valve. What role can the stainless steel spring in the safety valve play?

Many safety valves are equipped with stainless steel springs. By using the spring's purpose and elasticity, it is better to control the safety valve. What role can the stainless steel spring in the safety valve play?

 

The safety valve is mainly composed of a valve core, a valve seat, a valve stem, a spring, an adjusting screw, etc., and the safety valve mainly uses a stainless steel spring force to press the valve core on the valve seat. When the safety valve pressure exceeds the pressure of the spring acting on the upper part of the valve core, the valve core and the valve stem are jacked up, and the steam is discharged; when the safety valve is lower than the pressure of the spring acting on the upper part of the valve core, the valve core is lowered and pressed against the valve seat. The boiler stops exhausting.

 

The contact surface between the valve core and the valve seat is a tapered surface, and the edge of the valve core has a slight extension. When the steam is opened to the valve core, the edge of the valve core is also subjected to steam pressure, so that the entire working area suddenly increases, and the safety valve is suddenly opened; when the lowering force is reduced, the valve core is closed once due to the sudden decrease of the steam force. Prevent the spool from jumping repeatedly. The main parameters of the spring-loaded safety valve are the opening pressure and the exhausting capacity, and the exhausting capacity depends on the diameter of the seat and the lifting height of the spool. Due to the difference in lifting height, it can be divided into three types: micro-opening, medium-opening and full-opening safety valves.

 

The stainless steel spring type safety valve is compact in structure, small in size and light in weight; it has good rigor and easy adjustment, and can withstand vibration and rarely leaks. Therefore, it is sensitive and reliable. It is the most widely used and is the most commonly used one.

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