Hydraulic pumps

A reliable hydraulic pump is the heart of every hydraulic system. Whether in the workshop, on the construction site, or in industrial production – only precise pressure generation makes it possible to move heavy loads. At Globus Hebetechnik you will find a wide selection of pumps that stand out for their durability, efficiency, and safety. Order hydraulic pumps now!

What is a hydraulic pump and how does it work?

Enerpac hydraulic pumps are high-pressure pumps that pressurize hydraulic oil to power tools such as hydraulic cylinders, presses, torque wrenches, or pullers. They are used wherever high forces are required with precision, safety, and repeatability – for example in industry, plant engineering, steel construction, and maintenance.

A hydraulic pump converts drive energy (manual force, electric motor, or compressed air) into hydraulic pressure. The principle is based on pressure transmission in liquids: pressure can be transferred with minimal loss via hydraulic oil to cylinders and tools.

1. Oil intake from the reservoir
   The pump draws hydraulic oil from the integrated reservoir.
2. Pressure build-up in the pump element
   A pumping mechanism (depending on the design) compresses the oil. Many Enerpac solutions operate with multi-stage systems: initially a high flow rate for fast movement, followed by high pressure for the actual force application.
3. Delivery through the high-pressure line
   The pressurized oil flows via the high-pressure connection, coupling, and hydraulic hose to the connected tool.
4. Force generation at the tool
   In the hydraulic cylinder, the pressure acts on the piston surface – generating the desired force (e.g. lifting, pressing, clamping, or turning).

Which technical parameters are important when buying?

• Maximum operating pressure
  Enerpac hydraulic pumps often operate up to 700 bar. The permissible pressure must be compatible with the tool, hose, and couplings.
• Flow rate / delivery capacity
  The flow rate determines the speed of the hydraulic cylinder. Higher delivery capacity results in faster work cycles.
• Reservoir volume
  The oil reservoir must be large enough to reliably supply the oil demand of the connected hydraulic system.
• Drive type
  Enerpac pumps are available as manual, electric, or air-driven pumps – depending on the application, mobility requirements, and work intensity.
• Valve control
  Manual valves are suitable for simple applications, while solenoid valves are used for automated processes.
• Cylinder type
  The pump must match the single-acting or double-acting hydraulic cylinder used.
• Connections and compatibility
  High-pressure connections, hoses, and couplings must match the system and the maximum pressure.
• Safety features
  Important features include pressure relief valves, pressure gauges, and overload protection.

 The different drive types in detailed comparison

To find the right hydraulic pump for your specific hydraulic system, it is important to look at the technical performance data and the type of drive.

How to choose the right hydraulic pump

Selecting the right hydraulic component is crucial for safety and efficiency. Pay attention to the following points:

1. Required operating pressure: Does the pump’s maximum pressure match your hydraulic cylinder?
2. Desired speed: A higher flow rate ensures faster extension of the pistons.
3. Installation compatibility: Check in advance whether all connections in your system fit together.
4. Application environment: Do you need a mobile battery-powered solution, or would a stationary hydraulic power unit with a mains connection be more suitable?

Technical check: Single-acting vs. double-acting

A key difference when choosing a pump is how the return flow of the hydraulic fluid is controlled:

• Single-acting: The pump has one connection. It pushes oil into the cylinder to lift loads. The return movement occurs through the load itself or via a built-in spring in the cylinder.
• Double-acting: The pump has two connections (advance and return). The hydraulic oil is actively pumped in both directions. This is necessary when the cylinder must also actively “pull” or when precise return speed control is required.

The importance of usable oil volume

Often underestimated but critical for proper operation: the pump’s reservoir volume. The usable oil volume indicates how much hydraulic oil can actually be pumped into the system before the reservoir runs empty.

• Why is this important? If you operate several large cylinders at the same time, the reservoir volume of the hydraulic power unit must be large enough to fully extend all pistons.
• Safety margin: There must always be enough hydraulic fluid remaining in the reservoir so that the pump does not draw air through the suction port, which could lead to cavitation and damage to the piston pump.

When purchasing, make sure that the reservoir volume is about 20 to 30 percent higher than the total volume of all connected hydraulic consumers.

In addition, in the category System components you will find useful additions such as pressure gauges, distribution blocks, or support plates, which allow you to build your system safely and efficiently. There are also suitable solutions for the safe lifting and movement of loads.

In the category Lifting means you will find products such as round slings, shackles, or lifting points, which support applications where loads must be positioned or lifted precisely. Combined with your hydraulic pumps, this creates a complete and efficient lifting and positioning system.

If you need support with your selection or would like individual advice, you can reach us at any time via info@glds.de or by phone at +49 (0) 2103 9442-0. We will be happy to assist you!