Hydraulic power units

Electro-pumps convert electrical energy into hydraulic energy and deliver fluids. Typical designs include centrifugal, gear, piston or diaphragm pumps. They are quiet, efficient and versatile, e.g. in the water and chemical industries.

Hydraulic power units are complete supply units for hydraulic systems. They consist of a motor (electric, diesel, gasoline or PTO), pump, reservoir and valve technology. They are used to drive hydraulic actuators such as cylinders or motors. Compact units combine all components in a space-saving housing, while gasoline or diesel units are mobile and independent of the power grid.

Electro-pumps: Casings & impellers made of stainless steel, bronze, cast iron or duplex steel. Seals made of NBR or VITON®, plastics for chemical applications.

Hydraulic power units: Motors made of cast iron or aluminum, reservoirs usually of steel, compact units also of PE, PP or PA. Protective housings of steel or aluminum, often powder-coated.

• Electro-pumps: Flow rates from a few liters/min up to several thousand l/h, motor power from a few watts up to several kW.
• Gasoline-driven units: 3–13 kW, flow rates up to 50 l/min, reservoir sizes 10–40 liters.
• Compact units: Reservoir volumes from <1 liter to over 100 liters, flow rates from 0.25 l/min up to >50 l/min, motor power up to 11 kW or more.

• Electro-pumps: Water and wastewater supply, irrigation, heating technology, chemical, pharmaceutical, food industry, cooling circuits.
• Gasoline-driven units: Mobile construction machinery, forestry equipment, hydraulic tools on construction sites, emergency hydraulics.
• Compact units: Machine tools, presses, injection molding, lifting tables, lifting platforms, robotics, commercial vehicles.

• Electro-pumps: Efficient, quiet, compact, durable, adaptable to many media.
• Gasoline-driven units: Independent of the power grid, mobile, high performance, ready for immediate use.
• Compact units: Space-saving, modular, quiet, easy to maintain, simple to integrate.

• Electro-pumps: Correct alignment, priming, protection against dry running, regular inspection of bearings, seals and filters.
• Gasoline-driven units: Engine oil change, air filter, spark plugs, inspection of hydraulic oil, hoses and valves.
• Compact units: Tight connections, oil and filter changes, check for leaks, observe installation positions (horizontal/vertical).

• Electro-pumps: Depends on medium, pressure, installation conditions and maintenance. Service life often several tens of thousands of hours.
• Gasoline-driven units: Service life determined by engine maintenance, operating environment and servicing. With proper care, several thousand operating hours.
• Compact units: Dependent on pressure, temperature and oil quality. Submerged units often have longer service life due to better cooling.

The selection depends on:

Electro-pumps:

• Flow rate
• Pressure requirement
• Fluid properties (e.g. viscosity, corrosivity)
• Motor power
• Noise and safety requirements

Gasoline-driven units:

• Consumer’s power requirement (pressure/flow rate)
• Reservoir size
• Weight & mobility
• Materials depending on operating environment

Compact units:

• Flow rate
• Operating pressure
• Reservoir volume
• Installation position
• Power supply
• Special requirements (quiet, modular, customized)

Manufacturer specifications, data sheets and professional consultation are recommended for precise selection.