Pneumatic diaphragm pump is a new type of transport machinery, is a kind ofpump at present domestic most novel. Using compressed air as power source,for all kinds of corrosive liquid, with particles of liquid, high viscosity, volatile,flammable, poisonous liquid, can pump completely.

Pneumatic diaphragm pump has four of its material: plastic, aluminum alloy, cast iron, stainless steel. Diaphragm under different liquids were used NBR,chloroprene rubber, fluorine rubber, PTFE, poly four six vinyl. In order to meet the needs of different users. Placed in a variety of special occasions, for pumping of conventional pumps can not pump the medium, both with satisfactory results.

A pneumatic diaphragm pump, applicable situation

As the pneumatic diaphragm pumps have the above characteristics, the diaphragm in the world since the birth of the other pump has gradually penetrated the market, and occupies part of it. Such as: painting, ceramics in the diaphragm has an absolute dominant position, while in some other industries,such as its market share is expanding environmental protection, wastewater treatment, construction, sewage, fine chemical, and can not be replaced with other pump position. Is the advantage of pneumatic diaphragm pump:

1, as a result of air - powered, so with the back pressure flow (exports resistance) changes in the automatic adjustment, suitable for use in high viscosity fluid. The centrifugal pump operating point is set as the base watergood, if slightly higher viscosity of the fluid used, you need to complete reduceror frequency converter, the cost will be greatly improved, and the gear pump is the same.

2, in the flammable and explosive environment pneumatic pump with reliable and low cost, such as fuel, gunpowder, explosives, transportation, because: first,could not produce sparks after grounding; no heat generation second, work,machine not overheating; third, the fluid does not overheat because thediaphragm of the fluid a minimum of agitation.

3, at the site where the poor, such as construction sites, industrial and mining establishments

Wastewater discharge, due to the impurities and water are complicated, easy to plug the pipeline, so the pump on the formation of excessive load, the electrical heating vulnerability. Gas particle flow through and adjustable pneumatic diaphragm pump, pipe plug to open automatically when to stop.

4, another small easy to move the diaphragm, without foundation, the ground is extremely small, simple and economic installation. Materials can be used as portable pump.

5, in the material treatment harmfulness, corrosive, the diaphragm material can be completely separated with the outside world.

6, or a number of tests to ensure that no contamination of raw materials.

7, can be used for conveying fluid, the chemical nature of the relatively unstable:photographic materials, such as flocculation liquid etc.. This is because the diaphragm of the low shear stress, on the physical effects of materials for small.

Two, pneumatic diaphragm pump works

1, compressed air as power.

2, is a by the reciprocating diaphragm deformation caused by the volume change of volume pump, its working principle is similar to piston pump, due to the characteristics of diaphragm pump works, so the diaphragm pumps have the following characteristics:

(1) the diaphragm pump will not overheat: Powered by compressed air in the exhaust is an endothermic process of expansion, pneumatic pump when the temperature is lower, non - harmful gas emissions.

(2) diaphragm pump does not produce spark: pneumatic diaphragm pumps do not have electricity for power, ground and later to prevent static electricity sparks

(3) diaphragm pump liquid containing particles can be: because the volume ofimports and the work for the ball, so it is not easy to be stuck.

(4) the diaphragm shear stress is very low on the material: how the work of breathing in how spit, so the smallest stir of materials suitable for the delivery ofunstable substances

(5) diaphragm pump flow can be adjusted, can be installed a throttle valve to regulate flow in a material outlet.

(6) has a self-priming diaphragm pump function.

(7) air diaphragm pumps can be run without danger.

(8) the diaphragm can be diving.

(9) the diaphragm pump can transport fluid extremely broad, from low to high viscosity of the viscosity, obtained from the corrosive viscous.

(10) pump control system is not complicated, no cable, fuse.

(11) the diaphragm pump has the advantages of small size, light weight, easy to move.

(12) diaphragm pump without lubrication maintenance is simple and will not drip contamination due to the working environment.

(13) the diaphragm pump is always able to maintain efficient, will not reducebecause of wear.

(14) the diaphragm pump one hundred percent energy use, when close the outlet, the pump automatically shut down, equipment moving, wear, overload,fever

(15) diaphragm pump with no moving seals, maintenance is simple to avoid theleakage. When working, no dead point.