The pneumatic diaphragm metering pump has four materials: engineering plastic, aluminum alloy, cast iron, and stainless steel. Pneumatic diaphragm pumps use nitrile rubber, chloroprene rubber, fluoro rubber, PTFE, and poly-tetra-ethylene based on different liquid media. To meet the needs of different users. Placed in a variety of special occasions, used to pump a variety of conventional pump can not pump the media, have achieved satisfactory results.

The specific installation process of pneumatic diaphragm metering pump:

1. Installation and start-up of pneumatic diaphragm metering pump:

Place the diaphragm metering pump as close to the product as possible to minimize the length of the suction line and reduce the number of configuration parts. Do not reduce the line size. In order to extend the life of the diaphragm, the pump should be placed as close to the pumped liquid as possible. When the inlet pressure exceeds 10 feet (3 meters), a pressure relief adjustment device is required to extend the diaphragm life. If a hard pipe is installed, use a short hose between the pump and the pipe. The hose can slow down the vibration and distortion of the pipe. It is recommended to use a surge tank to further reduce the pulse in the fluid.

2, to the diaphragm metering pump gas supply:

The metal diaphragm pump air supply pressure must not exceed 125 PSI (8.6 BAR), and the plastic pump air supply pressure must not exceed 100 PSI (6.9 BAR). Connect the air inlet of the pump to a source of gas with sufficient capacity and pressure that meets the design requirements. If the gas supply line is a hard pipe, connect a short hose between the pump and the pipe to reduce the distortion. In addition to air intake caps, the weight of air intake ducts and pressure regulating filters must also be supported in some way. Failure to support the pipeline may damage the pump. Pressure regulators must be installed to ensure that the supply pressure does not exceed the specified range.

3, diaphragm metering pump before operation check:

Before working on the diaphragm metering pump, inspect all fixtures to prevent sagging. Tighten loose areas to prevent leakage. Secure with the method described in the card attached to the pump.

4, diaphragm metering pump intake and start:

At startup, the air valve opens approximately 1/2 to 3/4 turns. After the pump starts, open the air valve to increase the air flow to achieve the required flow.

5, pneumatic diaphragm metering pump exhaust:

If the diaphragm is broken, the extracted liquid or gas will enter the air port of the pump and be discharged into the atmosphere. When dangerous or toxic substances are extracted, the pipe needs to be discharged to a suitable place for safe handling.

If the pump is submerged in liquid, the gas must be discharged from the liquid surface, and the exhaust pipe should not be less than 1" (2.45 CM). Reducing the size of the exhaust pipe will limit the gas flow and reduce the pump usage rate. When the material level is high When pumping, the discharge port needs to be in a higher place to prevent siphoning.

At a certain temperature and humidity, the discharged gas may freeze up. Using gas drying can eliminate most of these problems.

6, after the use of pneumatic diaphragm metering pump:

If used to transport easily curable substances, thoroughly wash the pump after each use to prevent damage to the pump. (After use, the product left in the pump has dried or stuck to the pump, causing problems with the diaphragm and the valve before the next start-up). At freezing temperatures, the pump must be drained after use in all cases.

Note on valve lubrication:

Diaphragm metering pump air distribution valve and pilot valve are designed according to no oil, this is the ideal working condition. In some cases, if the hobby or air quality is very poor, the supply of compressed air can also be lubricated. After the compressed air supply system is properly lubricated, the air system industry of the pump can work with it. Proper lubrication requires the use of an air. The pipeline lubricator is set to send a drop of no-clean agent oil every 20 SCFM while the pump is working. The pump performance curve can be queried.

Pneumatic diaphragm metering pump feed pipe generally do not have to install the valve, directly select the diameter and diaphragm metering pump matching the pipe can be, pay attention to the feed pipe to have a certain strength, or work will collapse, affect the feed. Generally, a valve is added to the discharge pipe to see the on-site operating conditions. It is a manual valve or an automatic valve. The choice of piping and valves should be matched with the material properties (such as acidity, alkalinity, corrosion, etc.).

The gas circuit is generally equipped with triple pieces (pressure regulation, drainage, lubrication). Generally, the imported pump does not need to be lubricated. Ball valve, flow control valve (optional).

If demanding occasions also require the installation of regulators, pressure gauges, leak detectors and so on.

Such as the installation of solenoid valves, metering controllers, etc., can also be a diaphragm metering pump into a metering pump for remote control feeding.