Plunger Pumps

The Pleuger Aldrich plunger pump range includes vertical and horizontal plunger pumps that meet the highest performance requirements. They are used in almost all industries worldwide and cover a wide range of tasks including crude oil transport, pressurized water supply, hydraulic presses, descaling systems and fresh and sea water injection in oil fields - both on land and on drilling platforms.

These high performance, positive displacement pumps are designed for high loads and reliability, delivering a constant volume flow regardless of pressure.

Pleuger pumps are customized to meet demanding application specifications and can be designed using a range of materials and technologies to increase performance, efficiency and to minimize maintenance to suit customer requirements.

Liquid end Design Options

Depending on the application, Pleuger Aldrich plunger pumps use different pump ends and corresponding cylinder designs. The slurry pump end has been specially developed for pumping media containing solids such as minerals, ores, overburden and coal. The solids content can be up to 60 % by weight.

Pump cylinders with a minimum of clearance volume are the economical solution for pumping liquid gases such as ammonia, CO2, LNG and LPG. Minimizing the clearance volume is an essential method for improving the volumetric efficiency of pumping compressible media. This applies not only to process pumps, but also to secondary recovery into caverns and oil fields.

Design of the Cylinder Block

The monobloc construction of the cylinder block is convincing due to its high operational reliability. This one-piece construction with internal suction and discharge channels ensures individual accessibility to the valves without disconnecting suction and discharge connections.

The multi-part design of the cylinder block was designed for exceptional operating conditions, such as very high media temperatures. Suction and discharge manifolds connect the individual cylinder blocks. Depending on the requirements, forged or cast cylinders are used.

Stuffing Boxes

The stuffing box designs are adapted to the different media. Plungers in different material designs matched to these media contribute to reliable operation of the machine.


A wide range of different valve variants in ball, plate, cone or plug design are available for the various applications, ensuring reliable low-maintenance operation.

  • Chemical and petrochemical industry
  • LNG, CO2, LPG production
  • Oil Transport
  • Fertilizer production (ammonia & carbamate)
  • Transport of hot media (over 300°C/572°F)
  • Transport of highly viscous media
  • slurry transport
  • Glycol Pumps
  • Pressure tests
  • Hydraulic presses
  • Injection applications
  • Descaling
  • Wash Water Pumps
  • Boiler feed pump
  • Special applications
  • Vertical and horizontal construction of the plunger pumps possible
  • Monobloc or sectionalized cylinder blocks
  • Triplex, quintuplex, septuplex and nonuplex plunger pumps
  • References for high and low temperatures
  • Plunger pump operating pressures up to 2,000 bar (30,000 PSI)
  • Drive power of the plunger pumps up to 3,450 kW (4,600 HP)
  • Application-specific solutions for pump cylinders, the stuffing box, valves and seals
  • Design of the plunger pump according to API 674
  • Drive of the plunger pump either via belt drive or gear
  • Low maintenance and spare parts costs due to robust construction
  • Easy maintenance of the plunger packing due to good accessibility from all sides of the external stuffing box housing in the vertical version
  • Optimum operating times for plunger and stuffing box packing due to natural relief of the packing from the dead weight of the vertically immersed plunger in the vertical version.
  • High operational reliability against lubricating oil contamination due to absolute separation of the pump cylinder from the power end which is closed on all sides.
  • Good inspection possibility of the power end by generous inspection cover
  • Long service life due to robust construction

Technical Features of Horizontal Plunger Pumps

  • Plunger size: 25 mm up to 250 mm Plunger (1 to 10")
  • Flow rate: up to 800 m³/h (3,500 GPM)
  • Power: up to 2,500 kW (3,350 HP)
  • Discharge  pressure: up to 550 bar (8,000 PSI)
  • Discharge pressure in special cases: up to 2000 bar (30,000 PSI)
  • Temperature: from -40°C to 350°C (-40 to 660°F)
  • Speed: up to 530 RPM

The stated values are orientation values and can be adjusted according to the required operating conditions. 

Technical Features of Vertical Plunger Pumps

  • Plunger size: 38 mm to 229 mm Plunger (1,5 to 9")
  • Flow rate: up to 1,100 m³/h (5,000 GPM)
  • Power: up to 3,450 kW (4,600 HP)
  • Discharge pressure: up to 600 bar (9,000 PSI)
  • Discharge pressure in special cases: up to 2,000 bar (30,000 PSI)
  • Temperature: from -40°C to 350°C (-40 to 660°F)
  • Speed: up to 360 RPM

The stated values are orientation values and can be adjusted according to the required operating conditions.