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Definitions
- "Packaged Pumping System" refers to the pumps, motors, valves, manifolds and electric controls all factory assembled and wired on a steel skid plus any optional equipment such as a hydro-pneumatic tank or variable frequency drive(s).
- "System Pressure" in PSIG is measured at the discharge connection of the booster system.
- "Minimum and Maximum Suction Pressure" in PSIG is measured at the inlet connection to the booster system and must take into account the city water main pressure or suction tank level MINUS losses for the water meter, backflow preventer, other building components on the suction side, suction pipe friction losses and any difference in elevation.
- "Packaged Pump System Differential Pressure Required" is the pressure, designed by the engineer, to be added by the packaged pump system to the building; and is the difference between minimum suction pressure and the pressure required to maintain adequate pressure at all the fixtures in the building. (The “Pump Differential Pressure” will be 5 PSI higher to overcome losses internal to the packaged pumping system).
- "Pump Shut Off Pressure" in PSIG is the pressure added by the pump(s) at zero flow.
- "Pump Duty Point" is the pump design capacity in GPM, and head in FT. or PSI.
- "System Capacity" is the flow required to meet total peak demand in GPM.
- "Constant Speed" refers to pump(s) and motor(s) that operate at a steady unchanging speed.
- "Variable Speed" refers to pump(s) and motor(s) that operate over a range of speeds depending on system requirements.
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