CDL Series Vertical Multistage Centrifugal Pump

The CDL series is a vertical, non-self-priming multistage centrifugal pump for clean, non-flammable media that contain no solid particles or fibres. Published coverage is 2-162 m³/h at heads of 36-200 m with motor ratings of 1.1-132 kW, which suits water supply, industrial pressure boosting, water treatment and farmland irrigation. The pressure-retaining cylinder and impeller assembly are clamped between the pump head and the inlet and outlet sections, and the ports sit on the same horizontal plane as the base, so the unit drops straight into a pipeline. The overflow section is fabricated from stainless steel plate by stamping and welding, which makes the pump suitable for mildly corrosive media. The shaft seal is a cartridge mechanical seal with hard alloy and fluororubber elements, and an intelligent protector can be fitted to guard against dry running, phase loss and overload.

The published parameter table gives head at eight flow points for each model. The table below shows the rated duty point of each published model in the CDL2 range; heads are listed at 2 m³/h.

• Water supply systems: Plant filtration and delivery, zoned distribution and high-rise pressure boosting.
• Industrial pressure boosting: Process water systems, cleaning lines, high-pressure washing and fire protection systems.
• Water treatment: Ultrafiltration, reverse osmosis, distillation and swimming pool treatment plants.
• HVAC and boiler plant: Cooling and air-conditioning circuits, boiler feed water and condensate systems.
• Farmland irrigation: Sprinkler and drip irrigation fed from tanks, wells or storage ponds.
• Machine tool and process support: Auxiliary water and mildly corrosive media transfer inside plants.

• Build the duty from flow and head together, then read the corresponding point on the eight-point head curve for your chosen model.
• Confirm the medium is thin and clean; abrasive solids, fibres and flammable liquids are outside the published duty.
• Choose the stainless steel construction where the liquid is mildly corrosive, and confirm the seal materials against the medium.
• Check the available NPSH at the suction, because the series is not self-priming and needs a positive inlet condition.
• Decide whether the pump will use the standard coupled motor or a motor of your own, and whether an intelligent protector is required.