SyncroFlo, Inc.
2905 Pacific Drive Norcross, GA 30071 Tel: (770) 447-4443 www.syncroflo.com
HOW TO PRICE A COMMERCIAL SYSTEM
DEFINITIONS • Capacity – Flow typically given in US gallons per minute (GPM) • Pressure – Typically given in PSI or total dynamic head (TDH) • Water Booster – A system that boosts pressure in a water riser at a determined capacity • Isolation Valve – A valve used to shut off water service to a pump or riser line
• Check Valve – A valve used to prevent water from damaging a pump or other piping used in a building due to water hammer. • Pressure Regulating Valve – A valve used to regulate the outbound pressure of a pump to a predetermined pressure from the engineer. • VFD – Variable Frequency Drives are used to alter motor speeds between 30Hz and 60Hz • PLC – Programmable Logic Controllers are used as the brains behind the system. This is a device that is used to log and commence system operation by controlling output signals to the VFD’s and other equipment on the system. • CCES – Close Coupled End Suction. High flow, low head. • FMES – Frame Mounted End Suction. High flow, low head. • VMS – Vertical Multistage. Low flow, high head. • Segmented Ring Diffuser Pump (RKBV) – Robust version of a VMS pump. Low flow, high head. 50 year pumps • VIL – Vertical Inline. High flow, low head. • VTP – Vertical Turbine Pump. High flow, high head abilities. • HSC – Horizontal Split Case. High flow, low head.
EQUATIONS • PSI to TDH (SFI Standard) – (Boost psi + 5psi) * 2.31 = TDH • Speed and Frequency o Ns=(120*f)/P f = frequency Ns = Nominal Speed P = Motor Poles
VALIDATING THE CUSTOMER DATA • Check to make sure that all required information is currently entered on the RFQ sheet (ex. Suction pressure, pump capacity, pressure (TDH or PSI), system capacity, voltage, frequency, phase). • Additional helpful information would be a drawing or a specification. STARTING THE QUOTATION • The first step in designing the correct system is to know the application. Here we will be talking about commercial water boosters. • There are 3 main types of commercial booster systems. o Domestic Water Booster (DBP) o Tank Fill (TF) o Cooling Tower Make-Up (CTMU)
TANK FILL • The tank fill application is all about moving water from the lowest point of the building to the water storage tank. (Figure 1.1) • These systems typically have the highest pressure for domestic water applications. • Sequencing for these systems is typically controlled by level sensors installed in the storage tanks at the top of the building (Figure 1.2) • Level sensors – Float switches, Submersible level transducers, optical level transducers. • Float Switch – A device similar to the shut off valve in a toilet. Once the ball float reaches a certain height, a switch is closed and sends a signal to the PLC to stop the system operation indicating a full tank or a High Level Alarm. This works similarly in a Low Level Alarm scenario.
FIGURE 1.1
FIGURE 1.2
SyncroFlo, Inc.
INSTRUCTIONS
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