Why diaphragm pump is used

The diaphragm design means there is no tubing to fatigue or break due to wear or corrosion. Diaphragm pumps incorporate either hydraulic fluid or pistons to control the movement of the diaphragm. Low-lift, low-pressure pumps are designed to handle thick, viscous liquids, such as slurries or heavy oils, while others are engineered for high-flow applications and high pressures.

Teflon diaphragm pumps, for instance, are used for high-precision, high-pressure industrial applications. They have the ability to run dry for prolonged periods without incurring damage.

Most wear is caused by the transported fluid rather than the action of the pump. Heavy duty pumps are designed to withstand extremely thick, sometimes corrosive liquids, although the proper housing material is required for such uses. Subscribe to our newsletter to get expert advice and top insights on corrosion science, mitigation and prevention. By: Della Anggabrata. Dictionary Dictionary Term of the Day. Corrosionpedia Terms.

Anodize This: The Brilliance of Anodizing. Top Corrosion Mitigation Technologies to Watch for in Soluble Salts and Coating Performance. Introduction to Electroplating Interview with Jane Debbrecht. Metallizing They are also relatively inexpensive due to their simple design and operation. A double diaphragm pump is a positive displacement pump. It uses two diaphragms in and out to fill the pump chamber with fluid and then push it out.

When the diaphragms move away from the chamber, it lowers the pressure of the chamber and fluid rushes in. When they push back into the chamber, they increase the pressure and the fluid flows out. The fluids flow through one-way check valves, ensuring that fluid only flows in the proper direction through the chamber. Diaphragm pumps are known for their suction lift characteristics.

The size and rate of the chamber and diaphragms determine whether the pressure and flow rates are high or low. In addition, a diaphragm pump can be operated without the need to fill the suction pipe unlike the centrifugal pump , thanks to the fact that it is able to suck up the air contained in the suction pipe during the start-up phase, and eliminate such air through the delivery line self-priming capacity.

Thanks to the airtight separation between the pumping chamber and oil-bath lubricated transmission components, diaphragm pumps can withstand reasonable periods of dry running e. Because there are no mechanical parts in direct contact with the liquid as we have said, the diaphragm creates a airtight seal between the pumping chamber and the transmission components , the diaphragm pump can pump liquids that are not perfectly filtered with residues of solid particles such as crystals, sand or crushed stone mechanical resistance and can be used with most water-based plant protection substances , including when mixed with acids, solvents, abrasive particles, sediments or slurry corrosion resistance.

As you can see from the picture, the diaphragm separates in an airtight way the blue compartments, in which the pumped liquid flows , from the oil bath chamber in which the mechanical components are located in yellow.

November 2nd, 7 Comments. One of the most important components of a diaphragm pump is the pressure regulator, which is a must-have tool if you want to work smoothly, efficiently. May 21st, 7 Comments. Diaphragm pumps are the core of any spray boom or sprayer system. Their correct maintenance ensures, therefore, the correct operation of these machines. March 10th, 7 Comments. To ensure the perfect operation of diaphragm pumps, it is important to always carry out a correct and regular maintenance.