Safety Valve : Safety Valve is a one type of valve that automatically actuates when the pressure of inlet side of the valve increases to a predetermined pressure,
to open the valve disc and discharge the fluid ( steam or gas ) ; and when the pressure decreases to the prescribed value, to close the valve disc again.
Purpose of Safety Valve : Safety valve are used to prevent the boiler pressure parts from being pressurized more than the design value
Types of Safety Valve :
Assisted Type & Non-Assisted Type Safety Valves :
Assisted Type Safety Valves : Countries Like Germany They are Used these types of safety valves , the Pressure Raise is sensed by a Pressure Sensor and
the safety valve is opened to release the excess pressure.
Non-Assisted Type : It is Nothing but a Spring loaded safety valve , Countries like America and India are using these type of safety valves,
When the steam pressure exceeds the normal working pressure , the valves rise up against the action of the spring and allow the steam to escape
from the boiler till the pressure in the boiler reaches its working pressure.
