SJT/SJM CWP vertical cooling water pump

Your large flow "ready-to-order" cooling water pump

The SJT/SJM CWP are "engineered to order" large flow vertical pumps for industrial pumping needs and sump design, with semi-open or closed cast impellers available in sizes starting from 650 mm (26") impeller diameter and nq 75 (Ns 3'870). They are mainly designed as cooling water pumps for thermal power and combined-cycle power applications but can also be used in water or other industries.

SJT/SJM CWP vertical pump non-pull out
Main benefits
  • High pump efficiency
  • Modern fabricated suction bell and bowl casing incorporating swirl break for stable pump performance curve
  • Semi-open or closed cast impeller design for best fit and optimum efficiency
  • Segmented elbow to optimize pump efficiency
  • Optional full pull-out construction to reduce lifting crane capacity and ease maintenance
Main applications

SJT/SJM CWP pump is specifically designed as circulating water pump for the following fields:

  • Cooling water pump in utility thermal, nuclear, gas-fired combined-cycle power plants and industrial power stations
  • Water supply
  • Irrigation
  • Flood control and drainage
  • General water service
  • Cooling water pump for refining and seawater intake pump for open rack vaporizers in LNG regasification terminals
Features and benefits
CWP vertical pump cutaway
1. Modern fabricated suction bell and bowl casing
  • Incorporating flow straightener for stable pump performance curve
  • Tailor-made bowl diameter to optimize pump selection and efficiency
2. Modern semi-open or enclosed cast impeller design

Best hydraulic fitting and optimum efficiency. Fabricated impeller construction optional 

3. Individually sized pump shaft 
  • Sized for maximum torque. Shaft protection sleeves included as standard
  • Line shaft connected by split ring, key and sleeve couplings to ease maintenanc 
4. Fabricated column assembly and discharge head 
  • Column assemblies have integral spider to improve stiffness
  • Segmented elbow to optimize the pump efficiency
  • Above- or below-ground discharge to fit the site requirements

 

5. Product lubricated radial bearings 
  • Cutless rubber (phenolic backed) bearing bushings as standard in bowl/lineshaft, other material options are also available
  • Two bearings bushings included in the bowl for increased rotor stability
6. Packing shaft seal 

Reliable sealing and simple maintenance

7. Thrust bearing 

Thrust bearing can be provided either in the pump or within the motor

8. Optional full pull-out construction
  • Reduces the crane lifting capacity required
  • Significantly improves the maintenance turnaround time
 
Operating data
50 Hz 60 Hz
Impeller diameter Up to 1,920 mm Up to 76 in.
Capacities Up to 90,000 m3/h Up to 396,000 US gpm
Heads Up to 60 m Up to 200 ft.
Pressures Up to 8.6 bar Up to 125 psi
Temperatures Up to 50oC Up to 122oF
Performance range
SJT/SJM CWP performance range 50 Hz
Performance range 50 Hz
SJT/SJM CWP performance range 60 Hz
Performance range 60 Hz
Materials
Pump part Material
Casings Fabricated carbon steel, austenitic steel, duplex or super duplex
Impellers Chrome steel, austenitic steel, duplex or super duplex
Shaft Chrome steel, austenitic steel, duplex or super duplex
Column and discharge head Fabricated carbon steel, austenitic steel, duplex or super duplex
Optional designs
Thrust bearing assembly
Thrust bearing assembly
Thrust bearing assembly

  • Built to handle all of the downthrust produced by the pump and as much momentary upthrust that may occur
  • Flexible coupling with spacer allows servicing the thrust bearing and mechanical seal as needed
  • One-piece fabricated motor stand housing bolted down over the discharge to protect the bearing and support the motor

Optional features include sandstorm protection, special means for cooling and a constant-level oil lubricator. 

 

Below ground discharge head
Below ground discharge head
Below-ground discharge head

  • Comes with a segmented elbow designed to optimize pump efficiency
  • Elbows are fabricated in various materials to meet many application requirements
  • Discharge nozzle can be either plain-end or flanged
  • Motor stand mounted above-ground and designed to support the weight
Applications
  • Cooling water pump (CWP) for gas-fired
    Cooling water pumps (CWP) provide the fresh water to cool the exhaust steam in the condenser and pump it back to the wet cooling tower or the outlet of open cooling system. The major characteristic of the CWP is their high flow. In medium to large size gas-fired combined-cycle power plants, the CWP are vertical column type. In small power plants, the CWP could also be horizontal axially split type.

  • Cooling water pump for coal- and oil-fired
    Cooling water pumps (CWP) provide fresh water to cool the exhaust steam in the condenser and pump it back to the wet cooling tower or the outlet of open cooling system. The major characteristic of the CWP is their high flow. In medium to large size coal- and oil-fired power plants, the CWP are vertical column type. In small coal and oil captive power plants, the CWP could also be horizontal axially split type.

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  • Water supply
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