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Pneumatic butterfly valve assembly before the main points of the work


Release time:

2021-06-10

pneumatic butterfly valveIt is composed of pneumatic actuators and butterfly valves. In layman's terms, the pneumatic head and butterfly valves are combined to form a whole. However, it is often during assembly that attention should be paid to many details. The assembly is good, the pneumatic butterfly valve is good, and the assembly is not good. The quality and application of the pneumatic butterfly valve are not good. After years of experience, my technicians have sorted out the following 12 items to pay attention to details: 1. Before assembling, check that all parts of the pneumatic butterfly valve are not missing, the model is correct, check that there is no debris in the valve body, and there is no blockage in the solenoid valve and muffler.

Pneumatic butterfly valve assembly before the main points of the work

pneumatic butterfly valveIt is composed of pneumatic actuators and butterfly valves. In layman's terms, the pneumatic head and butterfly valves are combined to form a whole. However, it is often during assembly that attention should be paid to many details. The assembly is good, the pneumatic butterfly valve is good, and the assembly is not good. The quality and application of the pneumatic butterfly valve are not good. After years of experience, my technicians have sorted out the following 12 items to pay attention to details:
1. Before assembling, check that all parts of the pneumatic butterfly valve are not missing, the model is correct, check that there is no debris in the valve body, and there is no blockage in the solenoid valve and muffler.
2. Place the valve and cylinder in a closed state.
3. Hit the cylinder against the valve (the direction of the device can be parallel or perpendicular to the valve body), and then see if the screw holes are aligned, there will not be too much deviation. If there is a small deviation, turn the cylinder block a little bit, and then tighten the screws.
4. After the device is completed, the pneumatic butterfly valve shall be debugged (the air supply pressure is 0.4~0.6MPa under normal conditions). During debugging and operation, the solenoid valve shall be opened and closed manually (manual operation can only be effective after the solenoid valve coil is powered off), and the opening and closing conditions of the pneumatic butterfly valve shall be observed. If it is found in the debugging operation process that the valve has some difficulty at the beginning of the opening and closing process and is normal afterwards, it is necessary to reduce the stroke of the cylinder (adjust the stroke adjusting screws at both ends of the cylinder together a little bit, run the valve to the open position during adjustment, and then turn off the air source and adjust it again) until the valve opening and closing is smooth and closed without leakage. It should also be noted that the adjustable muffler can adjust the opening and closing speed of the valve, but it cannot be adjusted too small, otherwise the valve may not operate.
5, must be sent in front of the device should be kept boring, can not be stored in the open air
6. Check the pipeline before installation of the butterfly valve to ensure that there is no foreign matter such as welding slag in the pipeline.
7. The manual opening and closing resistance of the pneumatic butterfly valve body is moderate, and the butterfly valve torque matches the selected actuator torque.
8, pneumatic butterfly valve connection with the flange standard is correct, pipe clamp flange and butterfly valve flange standard. Advocate the use of butterfly valve special flange, shall not use flat welding flange.
9. Admit that the flange is welded correctly. After the butterfly valve device is completed, the flange shall not be welded again to avoid burning the rubber parts.
10. The installed pipe flange shall be in alignment with the butterfly valve.
11. Install all flange bolts and tighten them by hand. The butterfly valve and flange will be admitted to be in alignment, and then carefully open and close the butterfly valve to ensure sensitive opening and closing.
12, the valve completely open, with a wrench in accordance with the diagonal order to tighten the bolts, without washers, do not tighten the bolts, in order to prevent serious deformation of the valve ring, opening and closing torque is too large.