Double diaphragm pumps usually use compressed air, nitrogen or natural gas as the power source. The main directional control valve distributes the power source gas to the gas chamber, applies uniform pressure to the inner surface of the diaphragm, and moves the diaphragm connecting rod back and forth. When one side of the diaphragm moves outward under the action of gas pressure, the other side of the diaphragm is pulled inward, and one side is discharged while the other side is sucked. The direction of discharge and suction of liquid is controlled by the check valve. The suction stroke reduces the pressure in the pump chamber and increases the volume, forming an atmospheric pressure differential, pushing the liquid through the suction pipe, through the suction side check valve, and into the external liquid chamber. This repeated movement completes the continuous delivery of the medium.
Driving device: It can be different power sources such as compressed air, motor, hydraulic pressure, etc., which are selected according to the working environment and requirements to provide power for the movement of the diaphragm. Middle diaphragm chamber: It is the core part of the double diaphragm pump, consisting of two diaphragms and a flow channel. The movement of the diaphragm causes the liquid in the flow channel to be pumped in and out.
The characteristics of the double diaphragm pump are that the diaphragm completely separates the fluid chamber from the drive chamber, and there is no risk of sealing failure during operation, which can achieve leak-free transportation. It is particularly suitable for conveying toxic, harmful, flammable, explosive and other dangerous media. There are no rotating parts inside the pump body, mainly the reciprocating motion of the diaphragm, so it is not easy to wear and malfunction, has a long service life and low maintenance cost. The double diaphragm pump has good self-priming performance, can automatically absorb liquid without filling and priming water, and can convey various fluids from low viscosity to high viscosity, corrosive, viscous and containing particles. He can also adjust the flow rate by adjusting the pressure and flow of the power source or installing a throttle valve at the outlet to meet different process requirements.
FAQ
Q: Why are double diaphragm pumps suitable for conveying volatile or corrosive media?
A: The double diaphragm design isolates the media from the power components, reduces the risk of leakage, and adapts to special media.
Q: What are the common causes of unstable flow in double diaphragm pump operation?
A:It could be diaphragm wear, clogged inlet and outlet valves, or unstable air pressure.
Q: What is the focus of daily maintenance of double diaphragm pumps?
A: Regularly check diaphragm integrity, clean valves, and lubricate critical components.
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