The Main Types Of Hydraulic Pumps Explained

There are different types of hydraulic pumps, from the standard ones to new and innovative models. If you need help selecting the right pump, you should know first the big differences between the main types available:

Manual Pumps

Hydraulic pumps are used to operate hydraulic tools, just like a synthetic engine oil. The manual ones are also known as hydraulic hand pumps. These call for manual power to be operated. The range is split in two:

The best hand pumps have an ergonomic design and a compact build. These are suitable for a very wide range of industrial applications. Foot pumps are ideal when the job requires the highest oil output for all stages.

Hydrostatic test pumps

The hydrotest pump or hydrostatic test pump can be fully portable and are made to pressure test water systems: pressure vessels, water meters, sprinklers and so on. They work with irrigation lines, too. In order to employ the food grade grease, you need to fill the system before testing it. Then, the system pressure is raised by operating the pump handle. The valve is closed at the desired pressure. To avoid harmful, excessive pressure, most pumps have a valve for relief.

Electric and Air Powered hydraulic pumps

Electric pumps are usually compact and lightweight and can be suitable to any application. These can be operated in both vertical and horizontal fashion and is the top choice when operating hydraulic tools like nut splitters, lifting systems, cable cutters etc. Look for the more quiet and economical models for a really good deal. Air driven hydraulic pumps are their most reliable alternative and can also replace engine or motor driven hydraulics. The model compressed air to generate a high fluid pressure, being very flexible and powerful. It can adapt to system demands and never explode. Pressure can be maintained without consuming any energy.

External and internal gear pumps

Hydraulic gear pumps works in a smooth way and can handle high working pressure of up to 250 bar. When it’s external, only one of the gear wheels connects to the drive. The free gear is rotating in the other direction for an interlocking effect. Internal gear pumps make the connection between the gear rotor and the drive. It’s a mechanism of great versatility employed in non-mobile hydraulics.

The biggest challenge is to select the right type of hydraulic pump for the application. For this, you must always check the range of each pump, as well as its capabilities.