The basic function of a hydraulic control valve is to direct or regulate the flow of any liquid medium properly. The liquid is usually oil that runs through the hydraulic system. The position of the spool in the hydraulic system happens to determine the direction of the flow of oil and the system will only function according to the use of valves. Thus, valves are essential for any hydraulic system and you should choose the right type to make the system work as per requirement. The size of the hydraulic valve depends on the maximum pressure and flow of the system.
A basic description of the hydraulic valve:
A hydraulic valve is a basic mechanical device that opens up and closes in order to control the flow of the liquid. Valves are used in almost every industry and thus the variety is enormous. From high-end engineering and automobile industries to the basic foundries use valves. Funnily enough, you will find valves on a machine that produces valves. A hydraulic control valve is quite unique as it can withstand 3000 PSI and even more liquid pressure. Thus, these valves have to be made from strong and heavy iron or steel as per the requirement. Durability is one of the most important qualities that should be checked for while procuring these valves.
The construction should be such that the valve can contain the hydraulic pressure and also function smoothly and with perfection. The valves should not be affected by the high force exerted because of the pressurized liquid. The hydraulic control valve is a mechanical device that moves loads and actuators. While it might sound quite simple, it actually involves complex processes in order to make them work as per requirement. Some valves are operated mechanically using knobs, handles or cam, but there are pilot operated and solenoid operated valves as well. Some valves utilize the circuit pressure to function, such as a relief valve. The hydraulic control valve can also be operated using levers, cables, torque, plungers, motors, etc.
Different types of hydraulic valves:
Now that we have a fair idea about what is a hydraulic valve and how it works, let us take a quick look at the usual types of valves that are commonly used in industries. The three main categories of the hydraulic control valves are:
- directional control valves
- flow control valves
- pressure control valves
Apart from that valves can also be categorised according to their functions or requirements, such as:
- Hydraulic valve by function: Sequence valve, directional valve, Pressure reducing valve, relief valve, and flow valve
- Hydraulic valve by working type: Continuous regulating valve and on/off valve
- Hydraulic valve by control: Hydraulic transmission, manual operation, Pneumatic transmission, mechanical drive, Solenoid proportion drive, Solenoid drive, electric hydraulic drive
- Hydraulic valve by inner sealing: Ball valve, Spool valve, Spool poppet valve, poppet valve
Every type of valve function differently and has a certain unique function. Choosing the right type of valve will help you have a smooth and uninterrupted process in your factory.