Pneumatic Diaphragm Pump Accessories

Introduction to pneumatic diaphragm pump accessories

The BQG series of mine pneumatic diaphragm pumps, using, absorbing, and improving the world's most advanced pneumatic diaphragm pump production process and technology, is specially designed for coal mines. With traditional submersible pumps, mud pumps, impurity pumps, flexible shaft pumps, and all other functions, this is a revolution in traditional mine pumps. The pneumatic diaphragm pump's main accessories are the O-ring, slide valve, piston, and so on.

The key is to completely solve the safety problems of traditional pumps. Products can provide high delivery speeds at low pressure and are compatible with a wide range of materials. The pump has an anti-stall design and a modular air motor fluid part.

Working principles of the pneumatic diaphragm pump

The pneumatic diaphragm pump for mining uses the pressure difference in the air chamber to alternately produce the suction liquid pressure and the positive liquid pressure in the liquid chamber, and the valve switch can ensure the forward flow of the liquid. After ventilation, the pump begins to operate and continuously works to ensure that the required pressure remains constant. The pump will increase and maintain the pipe pressure, and when the maximum pipe pressure is reached (or the distribution valve is closed), it will stop working and, if necessary, resume pumping.

Environmental conditions of the pneumatic diaphragm pumps operating

To compress air for power, the pressure should be in the range of 0.2 ~ 0.7 MPa.

Conveying medium temperature does not exceed 40 °C;

The PH of the conveying medium is in the range of 4 to 10;

The maximum diameter of solid particles does not exceed 6 ~ 9 mm, and their volume concentration does not exceed 2%.

Ambient temperature: -20℃ ~ 50℃;

Ambient humidity: ≤95% (when the ambient temperature is +25 °C);

Atmospheric pressure: 80 kPa ~ 106 kPa;

It is suitable for dangerous places with coal dust and methane explosive gas in coal mines, but there is no corrosive gas that destroys insulation.

Introduction to BQG series mine pneumatic diaphragm pump

BQG series pneumatic diaphragm pump for coal mine drainage water or containing solid particle impurities (volume concentration of less than 2% sewage) can also be applied to non-coal mine transport media, similar to other occasions.

The BQG series mine pneumatic diaphragm pump adopts, absorbs, and improves the world's most advanced pneumatic diaphragm pump production process and technology. This product is specially designed for coal mines, with traditional submersible pumps, mud pumps, impurity pumps, flexible shaft pumps, and all other functions. It is a revolution in traditional mine pumps. The key is to completely solve the safety problems of traditional pumps. Products can provide high delivery speeds at low pressure and are compatible with a wide range of materials. The pump has an anti-stall design and a modular air motor fluid part.

Installation operation guide of the BQG series mine pneumatic diaphragm pump

1.The upper mouth of the pump is the water outlet, and the connection to the lower water suction port must be tied tightly.

2.The material supply pipe at the entrance should not be too small; otherwise, it will be easily blocked, and the hose that is easy to collapse should not be used.

3.Fix the diaphragm pump feet on the appropriate surface to prevent vibration damage.

4.If the diaphragm pump does not start within a few hours, disconnect the gas supply.

pneumatic diaphragm pump is a new type of conveying machinery and the most novel type of pump in China. Using compressed gas as the power source, all kinds of putrefying liquids—liquids with particles, high viscosity, volatile, flammable, and highly toxic liquids—can be pumped out. A pneumatic diaphragm pump has four materials: plastic, aluminum alloy, cast iron, and stainless steel. Pneumatic diaphragm pumps according to different liquid media are used: butadiene rubber, neoprene rubber, fluorine rubber, polytetrafluoroethylene, and polytetrafluoroethylene. To meet the needs of different users. Placed on a variety of special occasions, it is used to pump a variety of conventional pumps that cannot pump the medium and have achieved satisfactory results.

Repair and maintenance of the Pneumatic diaphragm pump

1. The clean operating platform prevents the precise internal moving parts from being affected by dust and foreign debris during disassembly and reassembly.

2. Keep good maintenance records and include diaphragm pumps in preventive maintenance projects.

3. Before disassembly, turn the upper part of the diaphragm pump downward to discharge the material in the pump and empty the residual material in the manifold.

4. Remove the upper and lower manifolds steps:

1) Remove the ball, O-ring, and tee;

2) Remove the fluid cover;

3) Remove the screw and diaphragm gasket;

4) Remove the O-ring, taking care not to scratch the surface of the connecting rod.

5. Replace the damaged parts and wipe the connecting rod (diaphragm rod) and O-ring with key-Lube oil.

6. Reassemble in reverse order.

Using precautions of the pneumatic diaphragm pump

1. The pneumatic diaphragm pump vibration is extremely slight; generally, you cannot install foot bolts.

2. Because compressing air into the dirt will affect the normal start of the pump, it is recommended that the user install pneumatic triplets.

3. When replacing the diaphragm, it is necessary to clean the pump wrist connecting rod and lead sleeve and do not damage the white tetrafluoroseal ring. Install it as is, and you can use it.

4. In the suction, it is easy to freeze the medium. The valve should be installed at the inlet of the pump. When the pump is stopped, the valve is closed first, and then, after opening the pump for a few minutes, the pump body media is drained until it is difficult to cause the next pump opening. 

List of the pneumatic diaphragm pump wearing parts

Name        Icon number            Quantity             Material

Diaphragm     BQG150/0.2-07            2              Hill road rubber

O-ring         φ40×2.4                  6               Nitrile rubber

O-ring         Φ32×3.2                  5               Nitrile rubber

O-ring         Φ25×2.4                  1               Nitrile rubber

O-ring         Φ32×1.6                  2               Nitrile rubber

O-ring         Φ19×3.2                  4                Polyurethane

O-ring         Φ14×2.4                  2                Polyurethane

O-ring         Φ19×1.6                  4                  PTFE

O-ring         Φ70×3.2                  4         Ethylene propylene rubber

Slide valve    BQG150/0.2-12              1                  ZL106

Piston        BQG150/0.2-90              1                  Acetal

Transportation Conditions

1. High temperature: +80℃;

2. Low temperature: -20℃;

3. Average relative humidity: 95% (+25℃);

4. Vibration: 50m/s2;

5. Impact: 500m/s2.