Overview
The NBQ series pneumatic diaphragm pump is a new type of conveying machinery and currently the most innovative type of pump in China. Using compressed air as the power source, it can extract and absorb various corrosive liquids, particulate liquids, high viscosity, volatile, flammable, and highly toxic liquids. Its performance parameters are similar to WLLDENPVMPS from the Federal Republic of Germany and MARIOWPUMPS from the United States.  

There are eight specifications of diameter for NBQ pneumatic diaphragm pumps: φ10mm（3/8C）、φ15mm（1/2∥）、φ25m（1∥）、φ40mm（11/2∥）、φ50mm（2∥）、φ65（21/2∥）、φ80（3∥）、φ100（4∥）。 Three materials: aluminum alloy, cast iron, and stainless steel. Diaphragm pumps use nitrile rubber, chloroprene rubber, fluororubber, and polytetrafluoroethylene according to different liquid media. To meet the needs of different users.
Since its commissioning in 1986, this pump has been adopted by over a thousand domestic units in the fields of petroleum, chemical, electronics, ceramics, and textile systems. It is installed in various special occasions to pump media that cannot be pumped by conventional pumps, and has achieved satisfactory results.

main purpose
1. Pump peanut butter, kimchi, mashed potatoes, red sausage, jam apple puree, chocolate, etc.
2. Pump paint, gum, and pigment.
3. Adhesive and glue, all types can be pumped up.
4. Various types of tiles, porcelain, bricks, and ceramic glazes.
5. After drilling the oil well, use a pump to suck up sediment and grout.
6. Pump various emulsions and fillers.
7. Pump various types of sewage.
8. Use a pump as an oil tanker and a barge to clear and extract sewage from the warehouse.
9. Hops and fermented powder slurry, syrup, sugar dense.
10. Pump water from mines, tunnels, ore dressing, and slag. Pump cement grout and mortar.
11. Various rubber pastes.
12. Various abrasives, corrosives, petroleum and mud, cleaning oil stains, and general containers.
13. Various highly toxic, flammable, and volatile liquids.
14. Various strong acids, strong shouting, and strong corrosive liquids.
15. Various temperature regulating liquids can withstand up to 150 ℃.
16. As a front-end pressure feeding device for various solid-liquid separation equipment.

Working principle
In each of the two symmetrical working chambers of the pump, there is an elastic diaphragm 6 installed. The connecting rod 7 integrates the two diaphragms into one. Compressed air enters the distribution valve 3 from the inlet joint 1 of the pump, pushing the diaphragms in the two working chambers and driving the two diaphragms connected by the connecting rod to move synchronously. At the same time, the gas in the other working chamber is discharged out of the pump from behind its diaphragm. Once reaching the end of the journey. The valve mechanism automatically introduces compressed air into another working chamber, pushing the diaphragm to move in opposite directions, thus forming synchronous reciprocating motion of the two diaphragms. Each working chamber is equipped with two one-way ball valves 4. The reciprocating motion of the diaphragm causes a change in the volume of the working chamber, forcing the two one-way ball valves to alternately open and close, thereby continuously sucking and discharging liquid.

Performance Overview
NBQ pneumatic diaphragm pump can not only pump flowing liquids, but also transport some media that are not easy to flow. It has many advantages over conveying machinery such as self-priming pumps, submersible pumps, shielded pumps, mud pumps, and impurity pumps.
1. No need for irrigation, with a suction height of up to 7m, a lift of 50m, and an outlet pressure of ≥ 6Kgf/cm2.
2. Wide flow shielding, good performance, allows for the passage of the largest particles, with a diameter of up to 10mm, and has minimal wear on the pump when pumping mud and impurities.
3. The head and flow can be infinitely adjusted through the opening of the air valve. (Adjust the air pressure between 1-7Kg/cm2).
4. The pump has no rotating parts and no shaft seal diaphragm to separate the pumped medium from the moving parts of the pump. The working medium is completely separated, and the conveyed medium will not leak outward. So when pumping toxic, volatile or corrosive media, it will not cause environmental pollution and endanger personal safety.
5. No need for electricity, safe and reliable to use in flammable and explosive places.
6. Can work submerged in a medium.
7. Easy to use, reliable in operation, the pump can be started and stopped simply by opening and closing the gas valve. Even if it runs without medium for a long time or suddenly stops due to unexpected situations, the pump will not be damaged. Once overloaded, the pump will automatically stop, with self-protection performance. When the load returns to normal, it can start running automatically again.
8. The pump has a simple structure and few vulnerable parts. It is easy to install and maintain. The medium conveyed by the pump will come into contact with moving parts such as the valve and connecting rod, unlike other types of pumps where performance gradually decreases due to wear and tear on components such as rotors, pistons, gears, and blades.
9. Can transport viscous liquids. (viscosity below 10000 centipoise)
10. Oil lubrication has no effect on the pump even when idling. This is a major feature of the pump.

Installation Dimensional Table of NBQ Pneumatic Diaphragm Pump