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Volumetric pumps, including our production of gear pumps, Roots pumps, high viscosity pumps, single screw pump, the power transmitted to the gear shaft, a pair of synchronous gear driven synchronous counter-rotating pump leaves the import zone to produce real mouth , Reduce the media inhalation, with the pump leaf rotation, the media sent to the exit, continue to rotate, the volume of the exit cavity becomes smaller, resulting in pressure (exit high pressure area) the media output. Due to the low volume pump positive displacement, self-priming capacity, poor flowability of high-viscosity media, full of time and speed full of holes, so this type of pump for high viscosity media. Pump internal sealing surface. Internal diarrhea is small, so the pump efficiency is higher, up to 70%, while high-pressure transmission medium can be reached, and the viscosity of the medium also has good adaptability.
Volumetric pumps are divided into two major categories of reciprocating and rotary, rotary volumetric pumps compared with reciprocating pumps, rotary pumps without suction, drain valve, reciprocating pump will not be as high viscosity of the liquid on the valve Affected by normal work, pump efficiency decreases rapidly with increasing viscosity. And in the delivery of liquid viscosity increases, pump down the number of revolutions less than the reciprocating pump, therefore, in the transfer of high viscosity liquid or liquid viscosity changes, the use of rotary solvent pump than the reciprocating positive displacement pump is more appropriate. Rotary volumetric pump points: gear pumps, rotary piston pumps, screw pumps, and vane pumps and several other categories. With a low number of revolutions, high efficiency, self-absorption ability, smooth operation, part of the pump can be preheated and other characteristics, widely used in conveying high viscosity media. Disadvantages: covers an area of ​​large, large-scale construction, bulky, heavy weight.
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