Diaphragm metering pump is a new type of pump. In recent years, due to the solid breaking progress in diaphragm material, it is applied in petrochemical, ceramic, metallurgy and other industries. The metering pump manufacturer suggests that the common faults and handling methods of the diaphragm metering pump should be mastered to effectively carry out the necessary daily maintenance of the equipment, so as to ensure that the working efficiency of the pump is not compromised.

Pneumatic diaphragm pump is running but the flow is too low

1. Check the pump body for cavitation and adjust the inlet pressure of compressed air. Reduce the running speed of the pump body to adjust the liquid with higher viscosity and concentration.

2. Check whether the valve ball is stuck. If the liquid conveyed does not match the valve ball material. The ball will swell. Please replace the valve ball and valve seat with proper materials.

3. Please check whether the inlet pipe is blocked.

Causes and treatment of insufficient flow of diaphragm pump

1. The inlet and outlet valves discharge; Repair or replace the feed valve.

2. Diaphragm damage; Replace the membrane.

3. The speed is too slow and the regulation fails; Maintain the control device and adjust the speed.

Reasons for and solutions to oil leakage of diaphragm pump:

1. The sealing gasket and sealing ring are damaged or too loose;

2. Adjust or replace the sealing gasket and sealing ring.

Pneumatic diaphragm pump fails to start or acts slowly

1. Check whether the filtering, pressure regulating and lubricating devices and the air inlet filter screen are blocked.

2. Check whether the air valve is stuck by impurities. Please remove the air valve and clean it, and check whether the piston in the air valve is scratched. If the piston surface is bright but not black and pure, it indicates that the piston and "O" ring need to be replaced because of wear. Injurious

Traces. If the piston surface is bright but not black and pure, it indicates that the piston and "O" ring need to be replaced due to wear. Please replace it with a new one.

3. Check the main shaft and "O" ring for scratches, wear and flattening. Replace them if damaged.

The liquid of the pneumatic diaphragm pump leaks from the outlet of the air chamber

1. Please check whether the diaphragm is broken.

2. Check whether the diaphragm is correctly installed and locked.

There are a lot of bubbles in the outlet liquid of the pneumatic diaphragm pump

1. Please check whether the diaphragm is broken.

2. Check the pump body and pipeline for leakage.

The pneumatic diaphragm pump circulates once and then stops?

1. The position of O-ring is incorrect;

2. The diaphragm inner pressing plate is installed backward;

3. The outlet is blocked or the outlet valve is closed (the system pressure is equal to or exceeds the air supply pressure);

4. Incorrect installation of air valve or intermediate gasket;

Is the pneumatic diaphragm pump stuck or running?

1. Over lubrication/under lubrication;

2. Wrong lubrication type;

3. Ice formation;

4. The manifold is blocked;

5. The outlet is blocked or the outlet valve is closed (the system pressure is equal to or exceeds the air supply pressure);

6. Cavitation occurs on the suction side;

7. Insufficient air intake;

8. O-ring is worn;

9. Steam pressure;

10. The specifications and dimensions of the pump are incorrect;