How to repair the damaged air operated diaphragm pump, the air operated diaphragm pump always stops

Air operated diaphragm pump disassembly and reassembly guide:

Warning: Before repairing the air-operated diaphragm pump, remove the air ** piping from the pump and discharge the air pressure from the pump. Remove all lines connecting the inlet and outlet of the air-operated diaphragm pump and discharge the fluid inside the pump into the appropriate vessel.

Wear protective hats, glasses, and gloves.

The air-operated diaphragm pump has no action or is very slow

1.Check the filter or air filter at the air inlet for impurities.

2.Check if the air valve is stuck and clean the air valve with cleaning solution.

3.Check the air valve for wear and replace it with new parts if necessary.

4.Check the condition of the sealing parts of the center body, if it is severely worn, the sealing effect will not be achieved, and the air will be discharged from the air outlet end. Due to its special construction, please use only glyd rings.

5.Check that the piston activity in the air valve is normal.

6.Check the type of lubricating oil. If the added lubricating oil is higher than the viscosity of the recommended oil, the piston may get stuck or not function properly. It is recommended to use a light and frost-resistant lubricating oil. (ISO grade 15 5wt antifreeze oil.)

Pneumatic diaphragm pump is a new type of conveying machinery, which is the most novel pump in China. Using compressed air as the power source, it can be used to absorb all kinds of corrosive liquids, liquids with particles, and high-viscosity, volatile, flammable and highly toxic liquids.

The air-operated diaphragm pump is available in four materials: engineering plastic, aluminum alloy, cast iron and stainless steel. The pneumatic diaphragm pump is made of nitrile rubber, neoprene, fluorine rubber, PTFE and PTFE according to different liquid media.

to meet the needs of different users. It is placed in various special occasions and used to pump a kind of medium that cannot be pumped by conventional pumps, and satisfactory results have been obtained.

Due to the above characteristics of air-operated diaphragm pumps, air-operated diaphragm pumps are gradually invading the market of other pumps since their inception and occupy a part of them. For example, the pneumatic diaphragm pump in the painting and ceramic industry has occupied an absolute dominant position, while in some other industries, such as environmental protection, wastewater treatment, construction, sewage discharge, and fine chemicals, it is expanding its market share, and has an irreplaceable position for other pumps.

The pneumatic diaphragm pump has action, but the flow rate is low or no liquid outflow at all

1.Check the cavitation of the pneumatic diaphragm pump and reduce the speed of the pump to allow the liquid to enter the liquid chamber.

2.Check if the valve ball is stuck. If the operating fluid is incompatible with the elastomer of the pump, the elastomer will expand. Replace the elastomer with an appropriate material.

3.Check that the fittings at the inlet of the pump are completely locked, especially the clamps near the valve ball at the inlet end.

The air valve of the air-operated diaphragm pump is icing:

Check whether the moisture content of the compressed air is too high and install air drying equipment.

Pump: Air bubbles are generated at the outlet of the air-operated diaphragm pump

Check that the diaphragm is not broken, and that the clamps are locked, especially the inlet pipe clamps.

The medium flows out of the air drain:

Check whether the diaphragm is broken, and check whether the diaphragm and the inner and outer splints are clamped on the shaft.

The valve rattles: increase the outlet or inlet head.

The maintenance of air-operated diaphragm pump can be divided into two aspects: daily maintenance and troubleshooting.

Daily maintenance includes the following aspects:

Replace the diaphragm regularly to avoid aging, cracking, or damage to the diaphragm.

Clean the filter in the pump body regularly to avoid damage to the pump due to dirt blockage.

Check the air pressure to make sure the air pressure is stable.

Check whether the gas discharge pipeline is blocked to avoid affecting the normal operation of the pump.

If the air-operated diaphragm pump fails, it needs to be repaired. The specific maintenance method will vary according to the fault situation, the following are some common faults and how to deal with them:

The flow of the pump becomes low or there is no water outflow: it may be that the inlet of the pump is blocked or the diaphragm of the pump is damaged and the diaphragm needs to be cleaned or replaced.

Loud or vibrating pump: It may be that the diaphragm of the pump is aging or there are debris in the pump body, and the diaphragm needs to be replaced or the inside of the pump body needs to be cleaned.

Reduced sealing performance of the pump: It may be that the seal of the pump is damaged and needs to be replaced.

The pump cannot be started: It may be that the air pressure is insufficient or there is debris blocking the inside of the pump, and the air pressure needs to be adjusted or the inside of the pump body needs to be cleaned.

In short, when carrying out the repair of air-operated diaphragm pumps, it is necessary to carefully analyze the cause of the failure and choose the appropriate maintenance method according to the specific situation.

Insufficient air pressure: Insufficient air supply pressure will cause the air-operated diaphragm pump to stop working. Check whether the compressed air pressure meets the requirements.

Insufficient liquid level: If the liquid level is insufficient, the air-operated diaphragm pump may stop operating. Check that the liquid level is sufficient, if it is insufficient, it needs to be filled with liquid in time.

Clogged filter of air-operated diaphragm pump: If the filter of air-operated diaphragm pump is clogged, it will cause the air-operated diaphragm pump to stop operating. Cleaning or replacing the filter can solve this problem.

Diaphragm rupture: If the diaphragm of an air-operated diaphragm pump ruptures, it will cause the pump to stop. The diaphragm needs to be replaced.

Pump body damage: If the pump body of an air-operated diaphragm pump is damaged, it can also cause the pump to stop. The pump body needs to be replaced.

Blocked air ducts: If the air ducts are blocked, the air-operated diaphragm pump will also stop working. Check the pipes for blockages, clean or replace them.

Liquid viscosity is too high: If the liquid viscosity is too high, it will cause the air-operated diaphragm pump to stop. The liquid needs to be replaced or the pump's parameters adjusted.

There are several reasons why an air-operated diaphragm pump may stop working:

1.Air source problem: Pneumatic diaphragm pumps need a stable air source**, if the air source pressure is insufficient or the air source pipe is blocked, it will cause the pump to not work properly.

2.Blockage of the pump body: Blockages may occur inside the pump body, such as the filter at the inlet of the pump body is clogged with dirt, or the diaphragm inside the pump body is stuck with dirt.

3.Pump leakage: The diaphragm or seal inside the pump body is damaged or aged, resulting in air leakage and failure to work properly.

4.Solenoid valve failure: The control solenoid valve of the pneumatic diaphragm pump is faulty, and the switch of the air source cannot be controlled, resulting in the pump not working normally.

5.Power supply issues: If the air-operated diaphragm pump is controlled using a solenoid valve, then power supply issues can also cause the pump to not work properly, such as a faulty power line or an unstable supply voltage.

According to the usage you provided, there may be impurities stuck, check the condition of the air supply. Because you don't know your brand and structure, the most direct way is to consult the manufacturer. If you have a problem, you can re**.

Whether it is full, or whether it is not lubricated enough.

Hello, there may be some Changfeng hand faults in the use of pneumatic diaphragm pumps, and the main causes of failures and maintenance methods are as follows: 1There is an air leak in the pump body

Common causes are broken diaphragms and damaged sealing rings for connecting lines. The corresponding damaged parts can be replaced, such as diaphragms, O-rings, etc. 2.

Reduced or no flow rate: It may be diaphragm fatigue failure, clogged pipeline, stuck inlet and outlet valves, etc. Diaphragms can be overhauled or replaced, pipes cleaned, and valves can be adjusted.

3.The pump stops working frequently: it may be that the air supply is insufficient, and the booster needs to be checked; It may also be that the motor connection part is in poor contact, and it is necessary to check the motor cable interface.

4.Pump stove disturbance, shaking, noisy: It is necessary to check whether the fixing bolts are loose, whether the pipeline joints are cracked or damaged, and whether the diaphragm is fatigued.

5.Overheating of the pump body: This may be caused by insufficient clamping of the diaphragm bolts, insufficient air supply, or insufficient lubrication.

It is necessary to adjust the tightening force of the bolts and check the gas supply system.

The common faults of pneumatic diaphragm pumps and their maintenance methods for leaking shed dust are as follows:

The pump does not start or stops immediately after starting.

Possible causes: insufficient air pressure, blocked air source pipeline, diaphragm pump inlet and outlet valve not opened, diaphragm pump inlet pipeline blockage, diaphragm pump air motor failure.

Maintenance method: check whether the air pressure and air source return pipeline are normal, check whether the inlet and outlet valves are open, clean the inlet pipeline, and replace the gas motor.

Reduced or no pump flow.

Possible causes: clogged inlet pipeline of diaphragm pump, blocked exhaust line of diaphragm pump, diaphragm pump diaphragm wear, diaphragm pump ball valve wear, diaphragm pump air motor failure.

Maintenance method: clean the inlet and exhaust lines, replace the diaphragm and ball valve, and replace the air motor.

The pump is noisy. Possible causes: air leakage and carrying of the inlet or exhaust line of the diaphragm pump, wear of the diaphragm of the diaphragm pump, and wear of the ball valve of the diaphragm pump.

Maintenance method: Check whether the pipeline is leaking, replace the diaphragm and ball valve.

Pump leakage. Possible causes: Diaphragm pump diaphragm wear, diaphragm pump ball valve wear, aging or damage to diaphragm pump seals.

Repair method: Replace diaphragm, ball valve and seal.

The pump is running unsteadily.

Possible causes: leakage of the inlet or exhaust line of the diaphragm pump, wear of the diaphragm pump diaphragm, wear of the ball valve of the diaphragm pump, failure of the air motor of the diaphragm pump.

Maintenance method: Check whether the pipeline is leaking, replace the diaphragm, ball valve and air motor.

The above are the common faults of pneumatic diaphragm pumps and their maintenance methods, which need to be troubled and repaired according to the specific situation. It is recommended to understand the structure and working principle of the diaphragm pump before repair, so as to carry out better maintenance.

The air-operated diaphragm pump is a commonly used industrial pump, but there will also be some failures during use and need to be repaired in time. The following are the common faults and maintenance methods of air-operated diaphragm pumps:

1.The pump does not start or has no flow after starting.

Possible causes: failure of air source, failure of pneumatic valve, blockage of pump head, rupture of diaphragm, blockage of suction line, etc.

Maintenance method: check whether the air source, pneumatic valve, pump head and pipeline are normal, clean up the blockage, and replace the ruptured diaphragm.

2.The pump head is leaking.

Possible causes: broken diaphragm, aging seals, loose pump heads, etc.

Repair method: replace the ruptured diaphragm, replace the aging seal, tighten the pump head.

3.Abnormal sound of the pump head.

Possible causes: loose pump head, damaged bearing, damaged mechanical seal, etc.

Repair method: Tighten the pump head and replace the damaged bearing or mechanical seal.

4.The pump head temperature is too high.

Possible causes: clogged pump head, ruptured membrane due to separator, loose pump head, etc.

Maintenance method: clean the blockage of the pump head, replace the ruptured let defense diaphragm, and tighten the pump head.

5.The pump head flow is unstable.

Possible causes: clogged suction line, loose pump head, ruptured diaphragm, etc.

Maintenance method: Clean the blockage of the suction line, tighten the pump head, and replace the ruptured diaphragm.

In short, the fault repair of the air-operated diaphragm pump needs to be carried out according to the specific situation, if it cannot be solved, it is recommended to contact professional maintenance personnel for processing.

There can be a variety of reasons why an air-operated diaphragm pump does not act, and here are some possible solutions:

Check the air supply: Check that the air supply is normal** and confirm that the air pressure meets the requirements of the pump. If the air supply is not normal, the air supply problem needs to be solved.

Check the valve: Check whether the valve of the pneumatic diaphragm pump is open, and check whether the inlet and outlet pipes of the diaphragm pump are unblocked. If the drain valve is not open or the pipe is not clear, it needs to be cleaned or repaired.

Check the electrical wiring: If the diaphragm pump has an electrical controller, you need to check whether the electrical wiring is normal. If the line is faulty, it needs to be repaired or replaced.

Check the diaphragm pump: Check the diaphragm pump itself for malfunctions. If there is a section bridge cherry blossom failure, it needs to be repaired or replaced.

Check the liquid: If the liquid being pumped has a high viscosity or concentration, it may cause the pump to malfunction. In this case, the properties of the fluid need to be checked and the grip plexus adjustment needs to be made as needed.

The above are the possible reasons and solutions for the non-operation of the pneumatic diaphragm pump, and the specific operation needs to be carried out according to the actual situation. If you are unable to handle it yourself, it is advisable to seek help from a professional technician.

After a long period of operation, the ball seat will inevitably be aged or worn due to long-term friction, and if no attention is paid to maintenance, the fit between the ball and the ball seat will be reduced, resulting in air leakage. In this regard, it is only necessary to replace new parts, and at the same time, it is necessary to pay attention to the maintenance and inspection of the equipment, and regular inspection of internal wearing parts can greatly reduce the probability of such failures.

Insufficient flow in the diaphragm pump common faults and maintenance matters, the probability of abnormal flow is relatively high, often because of the user's improper use of the guide macro caused by pipeline blockage, or the raw material inlet and outlet valve group problems, if the problem still exists after eliminating these two common faults, the integrity of the diaphragm and the stroke adjuster is confirmed, and the parts that are seriously worn or aged to no longer suitable for continued use are replaced in time.

If the pressure of the diaphragm pump is abnormally no pressure or the pressure is too low, it is usually caused by the operating temperature, if the temperature is too low, the oil return pipe in the pump body may freeze, resulting in the hydraulic system can not automatically complete the oil replenishment;If the outlet pressure fluctuates high and low, and fluctuates greatly, it is necessary to overhaul the pressure gauge first, then clean and dredge the raw material outlet valve, and then clean the stool and sell the filter at the inlet, and check the gas regulator.