Diaphragm valve installation precautions
1. Must comply with applicable safety regulations.
2. The pipeline must be free of impurities before the valve is installed, otherwise it will cause damage to the valve.
3. Connect the valve and pay attention to the alignment.
4. All valves must be dismantled before the welding process on the valve body.
5. When replacing the diaphragm, it is necessary to keep the diaphragm and the sealing surface open, and then separate the diaphragm from the sealing surface.
For air opening function valves:
1. Vent the actuator to lift the diaphragm out of the sealing surface.
2. Cross-disassemble the four screws on the valve body to separate the actuator from the valve seat, cut off the air supply, and replace the diaphragm.
3. Vent the actuator to retract the diaphragm.
4. Face the seal on the diaphragm and the valve seat, cross-install the fixing screws, and repeat the ventilation several times.
5. After the diaphragm valve is closed for leak test, it can be used normally.
For gas-closed function valves:
1. Cut off the air supply of the actuator to lift the diaphragm and get out of the sealing surface.
2. Cross-disassemble the four screws on the valve body to separate the actuator from the valve seat, ventilate, and replace the diaphragm.
3. Face the seal on the diaphragm and the valve seat with the diaphragm in the stowed state, and install the fixing screws crosswise.
4, repeated ventilation activities several times, close the diaphragm valve after the test leak, can be used normally.
For double acting function valves:
1. Cut off the air supply and lift the diaphragm out of the sealing surface.
2. Cross-disassemble the four screws on the valve body to separate the actuator from the valve seat, cut off the air source of the lower cylinder, inflate the upper cylinder, and replace the diaphragm.
3. Inflate the lower cylinder to close the diaphragm.
4. Face the seal on the diaphragm and the valve seat, cross-install the fixing screws, and repeat the ventilation several times.
5. After the diaphragm valve is closed for leak test, it can be used normally.
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