According to pressure regulation, the safety valve or relief valve can be divided into fixed non-adjustable pressure safety valve or relief valve and adjustable pressure safety valve or relief valve.
1. Fixed non-adjustable pressure safety valve or relief valve
The set pressure of fixed non-adjustable pressure safety valve or relief valve is already set when leaving factory, which cannot be adjusted in working. Fixed non-adjustable pressure safety valve or relief valve is normally applied to central air-conditioning, wall-mounted boiler, solar energy, etc.
2. Adjustable pressure safety valve or relief valve
The set pressure of adjustable pressure safety valve or relief valve can be adjusted in certain range according to customer’s different requirements. Adjustable pressure safety valve or relief valve is normally applied to the system whose set pressure should be changed often.