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3 Types of Control Valves Used in Hydraulic Systems

hydraulic valves

Hydraulic power systems are widespread in automotive, car, and aerospace equipment. They possess a solid power-to-weight ratio and can get idle, intermittently worked and even reversed. They can also move rapidly and react quickly. Another appealing advantage of the fluid control device is that it can be very long-term and deliver stable operating levels. You will consider one or two hydraulic valves in particular when you examine the parts of hydraulic equipment/machinery. You will find on the market different forms of hydraulic valves produced by various manufacturers. Based on the work performed, such valves may execute different roles. Most hydraulic machinery needs an independent valve, whereas some work with a mixture of valves.

Now let’s continue with the fundamentals of hydraulic valves. A hydraulic valve is an electronic tool that regulates the liquid or gas movement into it. Hydraulic valves regulate flow by system opening and closing. Such valves are often constructed from durable materials (steel or iron) to endure heavy fluid pressure of more than 3000 psi. We have several techniques for actuating a hydraulic pump. They may be controlled manually, using a stick, knob or cam, powered by a solenoid, or managed by the pilot. Continuous turning valves on/off valves are the two operational classifications.

Direction Controlling Valves

The Direction control valves regulate the flow of fluids from the system. Such valves will stop and resume fluid flow. Often, they can adjust the fluid flow path. Test valves, prefill valves, spool valves, etc., are the different lateral control valves used to maintain sufficient fluid movement inside the device. Non-return valves are the test valves and the prefill valves. Test valves obstruct the passage and friction of bidirectional gas. The prefill pump transfers the fluid into the hydraulic cylinder and reservoir. The fluid movement inside the device is regulated by spool valves.

The 2-way direction control valve is the most straightforward, with two ports for the inlet and outlet. Such mechanisms are found in water faucets, so the fluid movement may either continue or end. A three-way directional control valve has 3 ports: the inlet, outlet and exhaust. These are found in single actuating tubes, so all ports can be blocked by the third working tube. Likewise, 4-way and 5-way valves are used in double-acting actuators and air circuits.

Pressure Controlling Hydraulic Valve

The hydraulic pressure-reducing valve help in managing leakage and bursting of pipelines. Pressure control valves monitor the excess fluid pressure going through the pipeline. These valves maintain the pressure reached by the operator manually. The different styles are hydraulic pressure relief valve, series valve, counterbalance valve and pressure reducing valve. The counterbalance valve produces a complex mechanism and series valve power, sensing intense pressure. One of the essential types of pressure relief valves is that it sets the pressure cap by moving excess back to the tank.

Hydraulic Flow Control Valve

The flow control valves are used to monitor and adjust the flow of liquid or gas through the system. Those valves can maximize the efficiency of the hydraulic system. The flow control valves are used to track and regulate system pressure fluctuations. It prevents flow to unfunded components of the network.

Examples of flow control valves include the throttle valve, speed control valve, manifold-mounted flow valve, etc. A flow divider is another form of flow control valve. This valve takes input fluid from one source and redirects it to two or more sources.


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