Hammer lever safety valve profile

Hammer lever safety valve is the use of weights and levers to balance the role of the valve flap force. According to the principle of leverage, it can use the weight of the smaller hammer by increasing the lever to obtain greater force, and by moving the weight of the position (or change the mass of the hammer) to adjust the relief valve opening pressure. Hammer lever safety valve structure is simple, easy to adjust and more accurate, the added load will not increase due to the valve has a greater increase, suitable for high temperature applications, used to be more common in the past, especially Is used in boilers and high temperature pressure vessels. However, heavy hammer leveraged safety valve structure is relatively bulky, loading mechanism is easy to vibration, and often due to vibration and leakage; its back seat pressure is low, not easy to close after opening and maintain tight.