Pneumatic Diaphragm Pump Fault Inspection Analysis and Troubleshooting
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1. Before disassembling the pneumatic diaphragm pump, mark the air chamber and the liquid chamber on the left and right side respectively to help the subsequent reassembly.
2. Use a wrench to loosen the small clamp connecting the outlet pipe to the liquid chamber. Remove the outlet pipe to see the valve ball and valve seat. Take out the ball and seat and inspect the other parts of the pump for wear, chemical corrosion, cracks, etc. phenomenon.
3, use a wrench to loosen the small clamp connecting the inlet pipe and the liquid chamber, remove the outlet pipe to see the valve ball and valve seat, take out the ball and seat and check the other spare parts of the pump for wear, chemical corrosion, cracks, etc. phenomenon.
4. Use a wrench to separate the liquid chamber from the pump's intermediate. Remove the fluid chamber to see the diaphragm and diaphragm splint.
5. Use a tool or wrench to fix the left and right edges of the diaphragm outer plate and separate the diaphragm device from the intermediate. Then turn clockwise to release the diaphragm assembly. After removing the outer clip of the diaphragm, remove the shaft from the intermediate.
6. Separate the shaft from the diaphragm device using a clamp (with padded wood) and inspect the shaft, splint, and diaphragm for damage and corrosion.
7. Install from step 6 to step 1.
Second, the pneumatic diaphragm pump fault analysis and troubleshooting methods
Fault a: The pneumatic diaphragm pump has an action, but the flow rate is small or no liquid flows at all:
Treatment: (1) Check the cavitation of the pump and reduce the speed of the pump so that the liquid enters the liquid chamber.
(2) Check if the ball is stuck. If the operating liquid is incompatible with the pump's elastomer, the elastomer will expand. Replace the elastomer with the proper material.
(3) Check that the joints at the pump inlet are fully locked and not leaking, especially if the clamp near the inlet end ball needs to be locked.
Fault b: The air valve of the diaphragm pump freezes:
Disposal: Check if the moisture content of the compressed air is too high. Install the air drying equipment. Failure c: There are air bubbles generated at the outlet of the diaphragm pump:
Treatment: Check the diaphragm for cracks and check that the clamps are tight, especially the inlet tube clamps.
Fault d: product flows out of the air vent:
Treatment: Check if the diaphragm ruptures and check whether the diaphragm and the inner and outer splints clamp on the shaft. e: The valve makes a buzzing sound: Increase the exit or inlet lift.
Fault f: Pneumatic, electric diaphragm pumps are not operating or operating slowly:
Treatment: (1) Check the air inlet filter or air filter for impurities.
(2) Check that the air valve is stuck and clean the air valve with the cleaning solution.
(3) Inspect the air valve for wear and replace with new parts if necessary.
(4) Check the condition of the sealing part of the center body. If it is seriously worn, the sealing effect cannot be achieved, and the air will be drained from the air outlet end. Due to its special construction, please use only the glyd circle.
(5) Check if the piston movement in the air valve is normal.
(6) Check the type of lubricant. If the added lube oil is higher than the recommended oil viscosity, the piston may get stuck or operate abnormally. Lightweight and antifreeze lubricants are recommended. (iso grade 15/5wt antifreeze oil)
Third, pneumatic diaphragm pump disassembly and reassembly Notes:
WARNING: Before reconditioning the pump, remove the air source piping from the pump and vent the air pressure in the pump. Remove all lines that connect the pump's inlet and outlet, then drain the pump's fluid into a suitable container. Wear a protective cap, glasses, gloves.