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What is a flow valve?

If you're curious about hydraulic motors, if you're a DIY enthusiast of any kind, you'll have heard about hydraulic valves in your research. The subject is vast, and everything about it is closely interwoven and interdependent. So, in the light of all this, what is the role of these famous flow valves and how do they fit into the overall balance of our hydraulic motors? We've prepared a little subject for you to clarify your vision of the matter. We're off!

General information on hydraulic motors

Before delving into our subject, it's worth taking a quick look at the basics of hydraulic motors. So, what is a hydraulic motor?

A hydraulic motor is a type of motor that is also known as an isothermal motor. Why is it isothermal? Because its main function is to generate mechanical energy using hydraulic power. It is the transformation of hydraulics into mechanics that creates the condition for its operation, which can be described as hydrostatic transmission.

The action of generating power in this way relies on fluid pressure. To do this, the engine does not work alone, so to speak. It is the combination of pumps, valves and other reservoirs that enable these fluids to be put under pressure. These fluids are then channelled into the engine to produce mechanical energy and keep it running. Depending on their nature and function, a motor can perform a rotary or linear movement.

Note that this transformation is reversible. This is a characteristic of most hydraulic motors.

There are four types of hydraulic motor:

  • Vane. These have a rotor fitted with blades, which, under the pressure of the fluid, causes the coupling shaft to rotate.
  • Axial piston. These pistons move under pressure and, as they rotate, force the journal to pivot by means of a linkage.
  • Radial pistons. Here, the pistons rotate on a cam, allowing several strokes to be available. The piston pushes on its connecting rod on the cam concerned and thus acts on the engine coupling shaft.
  • Geared. This has toothed wheels, one of which engages in the other to drive a rotation when a fluid passes through them

After this brief but necessary look at hydraulic motors as a whole, let's move on to the heart of our subject: flow valves. How do they fit into this complex motor assembly, what is their role and what are their specific features?

Flow valves

Flow valves are an essential component of our hydraulic motor.

Their role is to manage and channel the flow of hydraulic fluids entering the motor to ensure that their total volume is not excessive or less than required.

Too much fluid could damage or disrupt the overall operation of the engine, while too little could bring it to a standstill. So it's our flow valve that manages the total volume coming in and adjusts itself if necessary.

To sum up, our flow valve's job is to regulate and control the distribution of the liquid. Turn it off when it is no longer needed, because the engine has stopped. Keep it stable during use, so that it is neither excessive nor inferior.

Now you know everything. See you soon for a new exploration of our hydraulic motors and valves!

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