200QJ32-144/9-22kW Cast Iron Deep Well Submersible Pump
The 200QJ32-144/9-22kW deep well submersible pump is a nine-stage electric pump designed to lift clean water from deep wells and boreholes. It delivers a rated flow of 32 m³/h at a rated head of 144 m and is driven by a 22 kW submersible motor. The pump is suitable for wells with a minimum internal diameter of 200 mm.
Model Specification
The model code identifies the pump's main specifications: "200" indicates a minimum applicable well diameter of 200 mm, "32" represents the rated flow of 32 m³/h, "144" is the rated head of 144 m, "9" indicates nine hydraulic stages, and "22 kW" is the rated motor power.
Cast Iron Construction
The pump uses cast iron construction for standard clean-water pumping applications. Cast iron provides the mechanical strength required for deep-well installation and pressurized water delivery. Water containing corrosive chemicals, high salinity or excessive abrasive particles should be evaluated before the pump is selected.
Nine-Stage Hydraulic System
The pump contains nine centrifugal hydraulic stages. Each impeller and guide-vane stage increases the water pressure, enabling the pump to overcome the dynamic water level, vertical elevation, pipeline friction and pressure required at the final outlet.
Submerged Operation
The pump and motor operate below the water level inside the well. Because water enters the pump directly, the unit is not limited by the suction height of a surface pump and does not normally require priming before startup.
Rated Operating Point
The rated duty is 32 m³/h at a head of 144 m. Actual flow will change when the system head changes, so the installation should be checked against the pump performance curve. Operating too far from the recommended duty range may reduce efficiency and service life.
Suitable Applications
This model can be used for deep-well water extraction, farmland irrigation, sprinkler systems, clean-water supply, storage-tank filling, industrial water transfer and pipeline pressure boosting. It is intended for clean water and should not be used for sewage, sludge or liquids containing large solids.
Well Requirements
The well must have an internal diameter of at least 200 mm, and the actual casing diameter should be measured before installation. The well must also provide enough water to support a continuous flow of 32 m³/h without allowing the dynamic water level to fall below the pump inlet.
Head Calculation
The 144 m rated head is the total pressure produced by the pump, not the recommended installation depth. The required system head should include the dynamic water level, delivery elevation, outlet-pressure requirement and friction losses in the discharge pipeline.
Installation Requirements
The pump should be installed vertically with its inlet below the lowest expected dynamic water level and above sediment at the bottom of the well. The rising pipe must withstand the operating pressure, and the electric cable should be secured along the pipe without excessive tension.
Electrical Protection
The 22 kW motor should be connected to a correctly rated control panel with overload, phase-loss, phase-sequence, abnormal-voltage and dry-running protection. The voltage, frequency, starting method and cable size must be confirmed for the installation site.
Frequently Asked Questions
What does 200QJ32-144/9-22kW mean?
It describes a QJ deep-well submersible pump for a minimum 200 mm well diameter, with a rated flow of 32 m³/h, a rated head of 144 m, nine pump stages and a 22 kW motor.
Can this pump be installed in a 200 mm well?
The model is intended for wells with a minimum applicable diameter of 200 mm. The actual internal casing diameter, straightness and installation clearance should still be checked before ordering.
Can it pump 32 m³/h continuously?
It can operate at its rated flow when the total system head is close to the rated duty and the well can continuously supply at least 32 m³/h. A lower well yield may cause the water level to fall excessively.
Does a 144 m head mean the pump must be installed 144 m deep?
No. Pump head represents the total energy required to lift and pressurize the water. Installation depth depends on the dynamic water level and well structure, while total head also includes pipeline losses and outlet pressure.
Can it pump sewage or muddy water?
No. This model is designed for clean water. Sewage, sludge, fibres and large solids require a sewage pump, while excessive sand can wear the internal hydraulic components.
Can the pump operate without water?
No. Dry running may prevent adequate cooling and damage the pump or motor. Low-water-level and dry-running protection are recommended.
What information is required before ordering?
Confirm the well diameter, well depth, static and dynamic water levels, discharge elevation, pipeline length, water quality, power-supply specifications and required cable length.
