Building water supply and pressure boosting
Domestic and commercial water supply, boosting and pressurising from tanks or mains.
Vertical multistage (CDM, CDL) and horizontal multistage (CM, CHL, CHM) pumps suit high head at moderate flow; TD and ZS suit larger flows at lower head.
What we need to select a pump Required flow and total head, including pipe friction and static lift Number of outlets / peak demand Inlet condition: mains, tank (suction lift or flooded) Electric supply (single / three phase) Watch out for A single flow-and-head match is not enough: check NPSH on suction lift and start-stop frequency Choose a pump whose duty sits near the middle of its curve, not at the far end Add a pressure tank or variable-speed control if demand varies widely Series to consider (a flow-and-head match alone does not make a pump suitable)
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Constant-pressure (variable-speed) supply
Holds a set pressure by varying motor speed: boosting, building supply, irrigation.
CHME is a complete unit with controller, sensor, check valve, gauge and tank. TDE has a built-in controller and runs up to six pumps.
What we need to select a pump Target pressure at the farthest outlet Minimum and maximum flow demand Inlet pressure available Control method (variable-speed drive or pressure switch) Watch out for The pump must hold pressure at low flow: check the curve is stable near shut-off Size the pressure tank and drive for the demand profile, not only the peak Verify maximum system pressure against the pump rating Series to consider (a flow-and-head match alone does not make a pump suitable)
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Heating, HVAC and circulation
Circulation for heating, air-conditioning, chilled and domestic hot water.
In-line TD pumps are the usual choice; LDMF suits hot water to 120 °C with low NPSH. Use the fluid and temperature fields for glycol or hot water.
What we need to select a pump Design flow and system head (including coils and valves) Fluid and temperature (water, glycol mixture) Open or closed circuit Duty / standby arrangement Watch out for Closed circuits need pressure rating and expansion arrangements, not only head Glycol changes density and viscosity: confirm the correction before selecting Quiet running and standby duty are often specified: ask us Series to consider (a flow-and-head match alone does not make a pump suitable)
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Cooling-tower circulation
Large flow at low head for cooling-tower and condenser water circuits.
LLT/LLTS are vertical; WLT/WLTS/WLTSF are horizontal. WLTSF has stainless flow parts.
What we need to select a pump Circulating flow and head to the tower distribution Water quality and temperature Suction arrangement (basin level) Materials required for treated water Watch out for Low basin level and warm water reduce available NPSH: check it Chemically treated water may need stainless steel parts Do not select only on flow and head; confirm NPSH and materials Series to consider (a flow-and-head match alone does not make a pump suitable)
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Hot water and boiler water
Hot-water supply and boiler-feed duties up to 120 °C.
Choose the hot-water type of CDL/CDM, or LDMF, which is built for high-temperature media and low NPSH.
What we need to select a pump Maximum liquid temperature Flow and head Circuit pressure Seal and elastomer requirements Watch out for Only series rated for your temperature may be used: the Finder excludes the rest Hot liquid reduces NPSH available; check it against NPSHr Seal and rubber materials must suit the temperature Series to consider (a flow-and-head match alone does not make a pump suitable)
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Wells, boreholes and irrigation
Water from wells and tanks, irrigation and lowering ground water.
SJ is the deep-well submersible; PQ is a shorter submersible for tanks, fountains and boosting. Axial and mixed-flow pumps cover large irrigation flows.
What we need to select a pump Static and pumping water level, well diameter Required flow at delivery head Sand / solids content Supply and cable length Watch out for The pump must fit the bore and be set below the pumping level Sand shortens life: say if the water carries sand Confirm motor cooling and cable voltage drop for long lowering depths Series to consider (a flow-and-head match alone does not make a pump suitable)
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Large-flow water transfer and fire fighting
Large flows for municipal supply, industrial transfer and fire-water systems.
NSC split-casing pumps cover large flows; NIS end-suction pumps list fire fighting among their uses (none is listed as a certified fire pump).
What we need to select a pump Flow and head at the operating point Liquid and temperature Suction arrangement and NPSH available Duty hours per day Watch out for Large pumps are sensitive to NPSH and operating range: both must be checked Flow and head alone do not decide efficiency or running cost Ask for the performance curve and efficiency at your duty point Series to consider (a flow-and-head match alone does not make a pump suitable)
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Sewage and waste water
Municipal and building sewage, waste water containing solids and fibres.
WQ submersible pumps and ZW/SP self-priming pumps pass solids and long fibres. Use the solids filter on the Utility pumps page.
What we need to select a pump Flow and head, including pipe friction Type of solids and maximum size to pass Pit dimensions and level control Single or duplex arrangement Watch out for Solids passage size matters as much as flow and head Do not select a clean-water pump for sewage Check pit volume against start frequency Series to consider (a flow-and-head match alone does not make a pump suitable)
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Drainage, flood control and dewatering
Storm and flood drainage, site dewatering, reservoir transfer.
QZB axial-flow and QHB mixed-flow pumps give the largest flows at low head; QF and WQ suit smaller drainage; SP is self-priming for construction sites.
What we need to select a pump Flow and lift Water type (clean, muddy, with sand) Portable or fixed installation Power supply on site Watch out for Gritty water needs a drainage-type pump, not a clean-water pump Check the discharge hose / pipe size and friction in the head Confirm float or level control Series to consider (a flow-and-head match alone does not make a pump suitable)
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Chemical and corrosive liquids
Acids, alkalis, solvents and process chemicals.
NIH (stainless process pump) and SZ (fluoroplastic) are the chemical ranges. CHLF(T) is for light chemical media only.
What we need to select a pump Exact chemical, concentration and temperature Flow and head Viscosity and solids content Required wetted materials and seal type Watch out for Material compatibility decides the selection, not flow and head Confirm density and vapour pressure for suction conditions We confirm the seal and elastomer for your chemical before quoting Series to consider (a flow-and-head match alone does not make a pump suitable)
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High pressure and reverse osmosis
High-pressure supply for reverse-osmosis, ultra-filtration and flushing systems.
CDLF+CDH and CDMF+CMH work as two pumps in series (to about 48 bar). HP is a horizontal high-pressure pump.
What we need to select a pump Feed flow and membrane pressure Water salinity and temperature Pump position (feed / booster) Material requirement Watch out for High pressure and corrosion resistance both matter Check the pressure rating against the membrane pressure Salty water needs the right stainless or duplex material Series to consider (a flow-and-head match alone does not make a pump suitable)
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Seawater and desalination
Seawater lift and high-pressure seawater reverse-osmosis.
VMHP and CH have duplex stainless wet parts for seawater at up to 75 bar. QF, QZB/QHB and WQ-F handle seawater lifting and drainage.
What we need to select a pump Flow and head Salinity and temperature Immersed or dry installation Material required Watch out for Standard stainless grades may not suit seawater: confirm the grade Corrosion and galvanic effects depend on the whole installation Do not rely on flow and head alone Series to consider (a flow-and-head match alone does not make a pump suitable)
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Swimming pools
Pool circulation pumps and sand filters.
Pool pumps are for 5–50 °C pool water; pool filters are rated by flow only.
What we need to select a pump Pool volume and turnover time Filter and piping losses Salt or chlorine dosing Supply (single / three phase) Watch out for Turnover flow and filter head set the duty; check the pump is not oversized Chemical dosing affects material choice Check self-priming and strainer arrangement Series to consider (a flow-and-head match alone does not make a pump suitable)
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Machine-tool coolant and tank immersion
Cooling, lubricating and cleaning circuits where the pump is mounted on a tank.
CDLK/CDLKF are immersion multistage pumps; a cavity body adjusts the pump length to the tank depth.
What we need to select a pump Coolant type, temperature and filtration Flow and head at the machine Tank arrangement Duty cycle Watch out for Coolant viscosity and swarf change the duty: tell us the fluid Check the seal compatibility with the coolant Confirm immersion depth and mounting Series to consider (a flow-and-head match alone does not make a pump suitable)
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