Pumping machinery


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Pumping machinery

Devices which convey fluids, chiefly liquids, from a lower to a higher elevation or from a region of lower pressure to one of higher pressure. Pumping machinery may be broadly classified as mechanical or as electromagnetic.

In mechanical pumps ghe fluid is conveyed by direct contact with a moving part of the pumping machinery. The two basic types are (1) velocity machines, centrifugal or turbine pumps, which impart energy to the fluid primarily by increasing its velocity, then converting part of this energy into pressure or head, and (2) displacement machines with plungers, pistons, cams, or other confining forms which act directly on the fluid, forcing it to flow against a higher pressure. See Centrifugal pump, Displacement pump

Where direct contact between the fluid and the pumping machinery is undersirable, as in atomic energy power plants for circulating liquid metals used as reactor coolants or as solvents for reactor fuels, electromagnetic pumps are used. There are no moving parts in these pumps; no shaft seals are required. The liquid metal passing through the pump becomes, in effect, the rotor circuit of an electric motor.

References in periodicals archive ?
Tenders Are Invited for Raw Water Rising Main 135 Hp Vt Pump 2 Nos (1w+1s) Discharge 8100 Lpm, Head 50m Raw Water Pumping Machinery at Intake Well, 150 Clear Water Rising Main, 120 Hp Centrifugal Pump 2 Nos (1w+1s) Discharge 3100 Lpm, Head 95m & 300 Hp Centrifugal Pump 2 Nos (1w+1s) Discharge 5100 Lpm, Head 156m Clear Water Pumping Machinery at Wtp, 250kva ,oa 630kva Document cost : INR 10000 EMD value : INR 9438800 Opening date : 29 Jan 2018
Tenders are invited for Providing and laying rising main for Booster and 1st stage, Supply and errection of submersible pumping machinery for booster stage, S/E of centrifugal pumping machinery for 1st stage and providing installation and successfully testing of PLC and SCADA based automation system for pumping machinery in connection with Prov.