Well for the inspectors, trainees, and freshers who just move into the piping systems will have their introduction, with fluid transporting devices which are mainly “PUMPS“. Almost piping system have the basic and the mostly optimized device know as centrifugal pump those are handled easily and it is cheaper when compared to other pumping devices, even maintenance cost is much lesser than the others. But the LIMITATION ( •cannot handle entrained air – 3%max •cannot handle viscous liquids)
THERE’RE 5 MAIN PUMP STYLES:
1-Horizontal Split Case
- good wear resistance (Mean of higher price )
- suction and inlet are opposite
- high head pressure ( Cooling tower service )
- There’re two type: Fix and portable pump those be arranged on Tanker, chemical Tanker ect.,
Because the clearances in these pumps is Because the clearances in these pumps is small, clean water applications are best for this type of pump.
• High pressure shower systems
• Boiler feedwater
• Desuperheater feed
Most commonly used to pump out of deep pits or wells. (giếng)
There are no priming issues due to the impellers being submerged in fluid.
Cavitation – The formation of vapor bubbles in liquid, developed in areas where the
pressure falls below the vapor pressure of the liquid. The imploding or collapsing of
these bubbles as they move to higher pres-sure areas in the pump triggers intense
shockwaves inside the pump, causing significant damage to the impeller and/or the pump housing.
Head – Simply put, head is the height at which a pump can raise a fluid up.
Priming – The act of clearing air from the pump’s internals in order to function.
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