Large vertical pumps SJT, SJM, SJP

Summary

Product identification

The Sulzer Pumps SJT, SJM, and SJP are large vertical pumps engineered-to-order for power and water applications.

• SJT (Turbine)
  • Ns 1800 < 5000
  • nq 35 < 110
• SJM (Mixed Flow)
  • Ns 5800 < 8300
  • nq 113 < 161
• SJP (Axial Flow / Propeller)
  • Ns ~ 14,500
  • nq ~ 280

Applications include:

• Cooling tower and cooling water circulation
• Waste or storm water sump drainage
• Water supply installations
• Booster service from open or closed systems
• Secondary recovery supply and injection systems
• Irrigation supply and land drainage
• Offshore fire and service water
• Flood control

Example pump designations:

• SJT 30KNC-3s: Vertical Turbine Pump, 30KNC (Nominal diameter of bowl [in], Hydraulic), 3s (Number of stages (3))
• SJM BSm 950/001-1s: Vertical Mixed Flow Pump, BSm (Pump type: B-Range, semi-open impeller), 950 (Nominal diameter of impeller [mm]), 001 (Hydraulic Code), 1s (Number of stages (1))
• SJP 48PO-1s: Vertical Propeller Pump, 48PO (Nominal diameter of bowl [in], Hydraulic), 1s (Number of stages (1))

Materials of Construction

Materials are selected based on application requirements.

• Bolting: Carbon Steel, Duplex
• Bearing Bushings: Cutless Rubber (Phenolic Backed), Cutless Rubber (Bronze Backed), Cutless Rubber (Stainless Backed)
• Shafts: 12% Chrome, Nitronic 50 (or EN equiv.)
• Impeller Rings (when applicable): 12% Chrome, Duplex
• Impellers: Alum. Bronze, 12% Chrome, 316 Aus (or EN equiv.), Duplex
• Bowls / Bell: Cast Iron, Carbon Steel, Duplex

Operating limits

SJT Large Vertical Pump

• Sizes: 46 Sizes (69 Hydraulic Combinations), > 20" (508 mm)
• Capacity: Q = 1,600 to 180,000 US GPM (360 to 41,000 M³/Hr)
• Head: up to H = 360 ft (110 M)
• Max. Operating Pressures: 125 up to 925 PSIg (8.6 to 63.8 Bar) (model specific, see ePM)
• Temperature: ≤ 122°F (50°C)
• Nominal Speeds: 320 RPM to 1800 RPM
• Direction of Rotation: Counterclockwise –or– (Clockwise, "B"-range and SJT 40CLC) as seen from drive end.
• Performance Range: See the official PDF for 60 Hz and 50 Hz performance ranges and sample performance curves.

SJM Large Vertical Pump

• Sizes: 17 Sizes (31 Hydraulic Combinations), > 24" (610 mm)
• Capacity: Q = 11,000 to 220,000 US GPM (up to 47,700 M³/Hr)
• Head: up to H = 160 ft (48.8 M)
• Max. Operating Pressures: up to 260 PSIg (up to 17.9 Bar) (model specific, see ePM)
• Temperature: ≤ 122°F (50°C)
• Nominal Speeds: 273 RPM to 900 RPM
• Direction of Rotation: Counterclockwise –or- Clockwise (B-Range) as seen from drive end.
• Performance Range: See the official PDF for 60 Hz and 50 Hz performance ranges and sample performance curves.

SJP Large Vertical Pump

• Sizes: 8 Sizes (8 Hydraulic Combinations), > 24" (610 mm)
• Capacity: Q = 11,000 to 220,000 US GPM (up to 47,700 M³/Hr)
• Head: up to H = 26 ft (8 M)
• Max. Operating Pressures: up to 270 PSIg (up to 18.8 Bar) (model specific, see ePM)
• Temperature: ≤ 122°F (50°C)
• Nominal Speeds: 300 RPM to 750 RPM
• Direction of Rotation: Counterclockwise as seen from drive end.
• Performance Range: See the official PDF for 60 Hz and 50 Hz performance ranges and sample performance curves.

Mechanical / hydraulic

Bowl Assembly

• Suction bells: Cast construction, with a tail bearing (to minimize shaft deflection at lowest impeller) and anti-vortex ribs on all sizes. Fabricated construction available for SJP.
• Bowls: Cast construction, flanged and bolted together. Fabricated construction available for SJP.
• Wear surfaces:
  • SJT: Integral wear surface standard on bell and bowls. Replaceable wear ring offered as an option.
  • SJM, SJP: Replaceable case liner offered as an option.
• Strainer: An optional strainer restricts entry of foreign objects into the bowl assembly.
• Bearing bushings: Located in the bowl assembly to provide rotor support. Lubricated by the pumped liquid as standard. Oil or clean water flush is also available.
• Impellers:
  • SJT: Most are enclosed design and cast construction. Some SJT impellers are semi-open. Can be a multistage pump.
  • SJM: Semi-open design and cast construction. Typically offered as a single stage unit; a two-stage pump SJM is available for increased head requirements (LS, MS & PS models only).
  • SJP: Open design (propeller type) and cast construction. Offered as a single stage unit only.
• Impeller mounting: Impeller is mounted on the pump shaft with a split axial retaining ring and key to allow easy disassembly.
• Impeller balancing: Impellers are dynamically balanced to reduce vibration.
• Pump shaft: Tailor-made to the service needs and sized individually for each installation; sized for max. torque.

Column Assembly

• Column pipes: Fabricated, flanged and bolted construction. Sized for a fluid velocity of 12.5 ft/sec (3.8 m/sec) at BEP flow rate; higher velocities are also possible upon request.
• Bearing spider: Each column joint has a bearing spider which houses the replaceable bearing bushing: drop-in bearing spider (≤14" / DN 350), integral spider (16"+ / DN 400+).
• Line shafts: Connected by a threaded coupling for shaft diameters ≤2.69" (68 mm). For larger shaft sizes, the coupling will be a sleeve, split ring and key type.
• Lubrication: Product lubricated column assemblies are offered as standard. Enclosed lineshaft is offered as an option (oil lubrication, grease packed or clean water flush are all offered).
• Enclosing tube: Will be threaded together or flanged and held in tension by the tube tension nut. A tube stabilizer will be supplied for every 30 ft (9 meters) of column assembly.
• Lineshaft sizing: Sized to transmit the torque over the entire range of operation.

Discharge Head

• A fabricated discharge head is offered as standard.
• These heads are offered with flanged or plain end connection. Flanges will be ANSI (AWWA C207 Class D).
• Each discharge head comes with segmented bend delivery nozzle and integral driver stand to support the driver.
• Window size will be large enough to allow easy access to removable packing/seal box and drive coupling.
• The discharge nozzle can be positioned either above or below ground.

Shaft Sealing Methods

• Enclosed Lineshaft: Shaft sealing is accomplished by packing below the tube tension nut.
• Product Lubrication:
  • Packed stuffing box is provided for reliable sealing and simple maintenance.
  • By-pass packing box is used for higher pressure applications where some of the pressure in the stuffing box is by-passed back into the sump.
  • Optional cartridge type mechanical seals are available.
  • Headshaft sleeve offered as standard with product lubricated stuffing boxes.

Thrust Bearing Location

• ISO Pump Design: Thrust bearing in pump.
• US Pump Design: Thrust bearing in motor (offered in pump as an option).
• A separate fabricated driver stand is supplied to accommodate the thrust bearing when it is fitted in the pump.

Thrust Bearing Details (if supplied in pump)

• Types:
  • VAL – grease lubricated, angular contact bearing
  • VALS/VALR – oil lubricated, spherical roller bearing (VALS for open sump application, VALR for suction barrel application)
• Bearing life: To be selected for L10 bearing life of 25,000 hrs at BEP and 16,000 hrs at Min Flow.
• Cooling: VALS/VALR are supplied with a cooling coil (fan cooled design available upon request).

Driving Assembly

The driver and drive coupling for the large vertical pumps can be one of the following:

1. Vertical hollow shaft motor with a threaded drive coupling: Axial thrust is carried in this motor. Sulzer Pumps supplies the drive shaft and requires a steady bushing. The lift setting is made via an adjusting nut at the top of the motor.
2. Vertical solid shaft motor with a flanged adjustable coupling (rigid coupling) with or without a spacer: Axial thrust is carried in this motor. The lift setting is made via an adjusting nut which is part of the rigid coupling assembly.
3. Vertical solid shaft motor with a flexible (disk type) coupling with or without a spacer: Axial thrust is NOT carried in this motor. Thrust bearing required in the pump. The lift setting is made via an adjusting nut which is part of the thrust bearing assembly.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. Contractual data for any project must always match the specific OEM PDF revision used for that project.

Official datasheet (PDF)

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