Working principle of spring type safety valve

The spring type safety valve is to press the valve core on the valve seat by the force of the spring, so that the safety valve is in the closed state, and the lower part of the valve core is pushed upward by the steam. During normal operation, the downward pressing force of spring is greater than the upward thrust of steam, and the valve is in closed state. When the steam pressure reaches the safety valve seat pressure, the force of steam on the valve core is greater than that of the spring, so that the valve core is jacked up and the safety valve of the rotor pump exhausts steam. Through the adjustment screw on the upper part of the valve stem, the tightness of the spring can be changed to adjust the seat pressure of the safety valve.
This kind of safety valve has the advantages of convenient adjustment, small volume and weight, and large exhaust capacity. It is suitable for boilers with different parameters and capacities.