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The pneumatic diaphragm valve has to withstand greater pressure during the opening and closing process. The sudden action changes the state of the water flow. The pneumatic diaphragm valve gradually opens from the closed state to form a gap. The shear force generated by the water flow acts on the gate.

Cut the edge of the gate. Repeated actions may cause the rubber ring to fall off or break, and the gate will be cut out of the gap, and the valve will not be tight.

1. The quality problem of the gate, the anti-corrosion layer of the gate and the gate body is peeled off or the anti-corrosion layer is thin, which causes the gate body and the gate to rust, and the thickness can reach 30-50 mm, which cause the gate cannot be closed or the gate body is damaged due to rust and slag. The sealing strip on the valve causes the valve to be loose. The sealing rubber ring has quality defects, and the installation is not firm or the thickness is too thin, which makes the sealing rubber ring fall off during the opening process;

2. Long-term immobility and improper maintenance of the pneumatic diaphragm valve make the operation of the pneumatic diaphragm valve difficult. The pneumatic diaphragm valve is inactive or not maintained for a long time, causing serious corrosion in the gate or gate, and the pneumatic diaphragm valve is lax after the rust falls off. , Operation is inconvenient.