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Spring type safety valve installation 6 requirements

The spring type safety valve refers to the valve of the valve or the sealing member of the valve is locked by the elastic pressure of the spring. Once the pressure generated by the pressure of the pressure vessel is abnormal, the high pressure will overcome the spring pressure of the safety valve, so the locking device is opened and formed. A pressure relief channel is used to vent the high pressure. Suitable for liquid and gaseous media, the following is a spring-loaded safety valve installation 6 requirements, I hope to help you. The spring type safety valve refers to the valve of the valve or the sealing member of the valve is locked by the elastic pressure of the spring. Once the pressure generated by the pressure of the pressure vessel is abnormal, the high pressure will overcome the spring pressure of the safety valve, so the locking device is opened and formed. A pressure relief channel is used to vent the high pressure. Suitable for liquid and gaseous media, the following is a spring-loaded safety valve installation 6 requirements, I hope to help you. Spring-type safety valve installation 6 requirements: (l) boilers with a rated evaporation of more than 0.5t / h, at least two safety valves: boilers with a rated evaporation of less than or equal to 0.5t / h, at least one safety valve. Safety valves must be installed at the outlet of the separable economizer and at the outlet of the steam superheater. (2) The safety valve should be installed vertically at the highest position of the potter and the header. Between the safety valve and the drum or header, the outlet pipe and valve for steam should not be installed. (3) The lever type safety valve shall have a device for preventing the weight from moving by itself and a guide for restricting the deviance of the lever. The spring type safety valve shall have a device for lifting the handle and preventing the adjusting screw from being twisted. (4) For boilers with rated steam pressure less than or equal to 3.82 MPa, the safety valve throat diameter shall not be less than 25 mm: for boilers with rated steam pressure greater than 3.82 MPa, the safety valve throat diameter shall not be less than 20 mm. (5) The connecting pipe of the safety valve and the boiler shall have a sectional area not less than the inlet cross-sectional area of the safety valve. If several safety valves are installed together on a short pipe directly connected to the drum, the cross-sectional area of the short pipe should not be 1.25 times that of all safety valves. (6) Safety valves should generally be equipped with exhaust pipes. The exhaust pipes should be straight to a safe place and have sufficient cross-sectional area to ensure unobstructed exhaust. The bottom of the safety valve exhaust pipe shall have a drain pipe connected to a safe place, and no valve shall be installed on the exhaust pipe and the drain pipe.

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