A double suction pump belongs to a fluid action pump, which uses the energy conversion relationship in the flow of working fluids to transport a liquid or a gas.
Double suction pump the working fluid can be water, also can use water steam, steam double suction pump, steam ejected from the nozzle at high speed, the static head is converted to the dynamic pressure, resulting in low pressure, liquid or gas inhalation, and steam mixture into the expansion tube, reduce the flow rate, pressure increase from the exhaust outlet. The structure of the double suction pump is simple and no moving parts. The single stage steam double suction pump can generate the residual pressure of 100mmHg. If the two or three and four or five stage steam double suction pumps are used, the residual pressure can reach 20, 2.5, 0. and 0.05MmHgg respectively. Its main disadvantage is low efficiency and high consumption of working fluid. Alcohol pump
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