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Zuhause> Blog> What is the difference between diaphragm metering pump and plunger metering pump?

What is the difference between diaphragm metering pump and plunger metering pump?

June 03, 2022
Metering pump is divided into plunger metering pumps and diaphragm metering pumps, electric plugs are now only metering pumps and electric diaphragm metering pumps to compare. Plunger pump is a DC motor driven piston complex movement of the liquid inhalation, after the discharge pressure, due to its exposed plunger, and the piston in the liquid work, the piston in liquid grinding wear very quickly, once equipped with a larger diameter Large nozzle, the plunger reciprocating frequency increased, exacerbating the plunger wear. Short life of the machine. The replacement of the plunger price is very expensive, if the voltage is not normal will also lead directly to the working DC is not normal. In addition, due to the large back and forth reciprocating motion, plunger pump work pulsation, making the flow instability. The initial suction pump piston pump is its advantage. Diaphragm metering pump, the design based on the plunger pump has been greatly improved, the principle is driven by a motor piston reciprocating work (note that the piston does not directly contact the liquid), and then promote the diaphragm movement, the liquid absorption and pressure After the launch, due to its piston in the anti-wear oil work environment greatly optimized, greatly improved life expectancy, after the infiltration hardened piston is not easy to damage, with high polymer materials made of high anti-twist diaphragm to diaphragm pump Life expectancy further improved. Reliable operation is another advantage of the diaphragm pump, the failure rate is very low, low voltage requirements, low environmental requirements, easy maintenance, maintenance costs only about one-fifth of the plunger pump. Diaphragm pump cost-effective, its excellent cost performance will promote the diaphragm pump promotion.
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