Multistage Surface Pumps

The multistage surface pump is a cost-effective, low-maintenance H-pump used for high-volume and high-pressure fluid movement.

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The multistage surface pump is a horizontal pump that includes a field-repairable thrust chamber and a Type 1, balanced Type 1, or cartridge mechanical seal system. Its skid-mounted design allows for convenient, easy installation.

Thrust chamber

The thrust chamber of the multistage surface pump (MSP) is field repairable and does not require pump or motor removal for maintenance. Designed with proven bearing arrangements used in the established Magnum™ I centrifugal pump line, the MSP features dual bearing systems that provide a minimum L10 life rating of 25,000 hours at all thrust loads up to 20,000 lbf. The standard MISSION™ thrust chamber configuration includes oil level sight glass with an oil temperature gauge. The thrust chamber is specifically designed to handle maximum thrust loads in surface pump operations.

Seal system 

The MSP seal system uses standard Type 1, balanced Type 1, or cartridge mechanical seals. The seal face materials are chosen to optimize the seal life according to specific applications. The mechanical seal (located in the fluid end) is completely separated from the thrust chamber, which prevents any cross-contamination should seal leakage occur. The mechanical seal is field replaceable and can be changed in 1 hour without disturbing any piping or motor connections.


The modular skid features a universal design that offers significant cost savings and shorter lead times while maintaining motor torque to stabilization requirements. The MSP modular skid was designed using the latest 3D modeling software and finite element analysis tools to ensure a rigid foundation and effective vibration control for extended pump life at the lowest possible cost.

Performance control and monitoring 

Standard packages include pressure, oil level, and vibration sensors as specified by you to meet critical application requirements.


  • Cost effective
  • Low maintenance
  • Field-repairable thrust chamber
  • No pump or motor removal for maintenance
  • Field-replaceable mechanical seal
  • Can be completed in 1 hour without disturbing any piping or motor connection
  • Mechanical seal separated from thrust chamber
  • No cross-contamination in case of seal leakage
  • Reduced maintenance
  • Minimal site preparation and reduced downtime
  • Minimal lead time
  • Short construction phase

Multistage Surface Pump Specifications

Standard material for impeller and diffuser

ASTM A436 Type 1 or 2205 Duplex Stainless Steel*


**Inconel or **Monel alloy K500

Maximum suction pressure

1,000 psi

Maximum discharge pressure

3,600 psi

* Additional materials and coating options are available.
** Inconel and Monel are trademarks of Huntington Alloys Corporation.

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