Thetys Pumps SRL
Tel: +40 744 595 445
Str. Teheran, nr. 11, sector 1,
011931 Bucuresti, Romania

Because life is fluid.


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MC high-pressure stage casing pump – Thetys Pumps
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MC high-pressure stage casing pump

Thetys Pumps / Products  / Pumps  / Ring section pumps / MC high-pressure stage casing pump

MC high-pressure stage casing pump

High-pressure pump designed to your spec

M-series high-pressure stage casing pumps have a modular design. This allows Sulzer to find the most efficient solution to meet customer requirements, typically for feedwater pumps and condensate extraction pumps in gas-fired combined-cycle power plants, among other applications. Both investment cost and life cycle costs are taken into consideration when designing the optimal pump, and an optimized hydraulic design guarantees maximum efficiency.

Main benefits
  • Modular hydraulics for high efficiency in a wide range of operating conditions as required for gas-fired combined-cycle power plants
  • Optimized design for thermal conditions as applicable in gas-fired combined-cycle power plants
  • Large branch sizes for optimized inlet flow, low noise level and higher allowable forces and moments
  • Unaffected by rapid temperature variations and therefore highly suitable for gas-fired combined-cycle power plants where frequent start-stop operation is specified
  • Easy access to the seal cooling chambers for cleaning
  • Stiff shaft design for critical speeds above the maximum operating speed
Main applications

The MC pump is primarily designed for power applications, such as: auxiliary boiler feed services; Nitrogen Oxides (NOx) abatement and fuel injection in combined-cycle power plants; boiler feed for biomass fired and industrial power plant; and steam generator feed in concentrated solar power plants. The design is ideal for:

  • Main and auxiliary boiler feedwater pump duties up to 180°C
  • Nitrogen Oxides (NOx) abatement and fuel injection in gas-fired combined-cycle power plants
  • Condensate extraction pumps in power stations and industrial plants
  • Auxiliary services within gas-fired combined-cycle and industrial power plants
  • Feedwater pump in desalination by reverse osmosis
  • High pressure water in general industry
  • Feedwater pump for gas-fired combined-cycle power plants
  • Feedwater pump for concentrated solar power plants
  • Boiler feedwater pump for biomass and industry power plants
Features and benefits
Cutaway of MC high pressure stage casing pump
1. Casing support

Foot or shaft centerline mounted for large sizes and high temperatures

2. Branches
  • Large suction branches optimize inlet flow
  • Reduce noise levels through low branch velocities
  • Allow higher forces and moments
3. Impellers
  • Several hydraulic sets per pump size guarantee high efficiencies and low operating costs over a wide operating range
  • Low net positive suction head required (NPSHR) first stage; double suction first stage can be provided for selected sizes
4. Shaft

Stiff design resulting in higher critical speed than running speed and small shaft deflection. Areas subject to wear are protected

Operating data
50 Hz 60 Hz
Discharge sizes up to 350 mm up to 14 in.
Capacities up to 1,860 m3/h up to 9,720 US gpm
Heads up to 1,750 m up to 5,500 ft.
Pressures up to 180 bar up to 2,610 psi
Temperatures up to 180°C up to 356°F
Performance range

Performance range 50 Hz

Performance range 60 Hz

Pump part Material
Suction, stage and discharge casing
Carbon steel, chrome steel, duplex steel
Impellers and diffusers Carbon steel, chrome steel, duplex steel
Shaft Chrome steel, duplex steel
Balancing system Chrome steel, duplex steel