Allweiler SOB 222 W G2V10 Side Channel Pump with Motor

Allweiler SOB 222 W G2V10 Side Channel Centrifugal Pump with Motor

The Allweiler SOB 222 W G2V10 is a multi-stage regenerative side channel centrifugal pump engineered for high-differential pressure duty at moderate and low flow capacities. Built by Allweiler (CIRCOR Group) to stringent German marine manufacturing standards, the SOB series excels where conventional centrifugal designs cavitate or fail to prime: handling volatile fluids, boiling condensate, fuels, and liquids entrained with up to 50% non-condensable gas or vapor.

This specific unit comes skid/bracket-mounted with a matched 3-phase marine induction motor. Every unit undergoes electrical insulation testing, mechanical seal inspection, hydrostatic pressure testing, and dynamic run-up validation prior to dispatch.

Model Details

• Manufacturer: Allweiler AG / CIRCOR
• Pump Series: SOB (Self-priming, regenerative side channel design)
• Model Code: SOB 222 W G2V10
• Manufacturer Part Number (MPN): SOB222W-G2V10
• Assembly Type: Direct close-coupled / lantern-bracket mounted electric pump set

Technical Details

Compatibility

• Auxiliary Marine Boilers: Aalborg, KangRim, Miura, SAACKE, and Clayton exhaust gas economizers and packaged marine boiler feed water loops.
• Evaporator Systems: Alfa Laval freshwater generators, Sondex distillers, and low-pressure flash evaporators.
• Hydrophore Systems: Shipboard sanitary, washing, and technical freshwater pressure boosters.
• Fuel & Lub-Oil Conditioning Units: GEA Westfalia, Alfa Laval, and Mitsubishi purifiers / booster modules (light distillates, clean transfer, washing loops).

Part Number Cross-References

• Allweiler SOB 222
• Allweiler SOB222W G2V10
• Allweiler SOB 222-W-G2-V-10
• CIRCOR Allweiler SOB Series 222 Stage 2
• Smedegaarden Ref: 18683

Applications

• Marine auxiliary boiler feed and economizer circulation
• Hotwell condensate return and extraction systems
• Engine room technical water and jacket pre-heating circulation
• Low-flashpoint volatile hydrocarbon and marine gas oil (MGO) light transfer
• Fresh water hydrophore pressurization systems
• Industrial autoclave feed and high-pressure washing loops

Frequently Asked Questions

What makes an Allweiler side channel pump different from a standard centrifugal pump?

A standard centrifugal pump loses prime instantly if air or vapor enters the suction eye. The Allweiler SOB side channel design uses star-shaped open impellers working in conjunction with an internal side channel casing. This creates continuous fluid vortices that pull vapor through the stages, allowing the pump to self-prime and handle liquids with high gas content without vapor-locking.

Can this unit be used as a direct replacement for an older SOB 222 model?

Yes. The SOB 222 casing dimensions, centerline heights, and flange bolt patterns comply with standardized DIN/EN dimensional norms, making direct bolt-in replacements straightforward without modifying deck stools or pipe flanges.

How do I verify the rotation direction safely?

Do not bump the motor dry. Disconnect the shaft coupling or prime the pump wet with water/oil before bumping the starter for a fraction of a second. The pump shaft must rotate in strict accordance with the cast rotation arrow on the bearing housing.

What is the maximum fluid temperature this unit can handle?

When configured with standard FKM/EPDM elastomers and balanced mechanical seals, the Allweiler SOB 222 operates reliably in technical water and condensate loops at temperatures up to 120°C. Ensure sufficient suction static head is maintained to prevent boiling within the suction chamber.