The 3 Main Hydraulic Valve Classifications

Hydraulic valves

Hydraulic systems are essential components of equipment from many industries and areas of everyday life, including amusement rides, cars, dishwashers, airplanes and more. They power lifts, brakes, jacks and more. Put simply, they operate by exerting pressure on small amounts of fluid to generate energy. The basic model consists of four main components, a reservoir, a pump, actuators (pistons) and valves. Hydraulic valves Ashland KY, which regulate liquid flow, may be placed into three primary categories based on the intended function.

1. Directional ControlĀ 

The purpose of this form of valve is to route hydraulic fluid between devices as needed. It is also called a discrete valve because it shifts to different positions of this kind, extend, retract and neutral. In the first and second cases, fluid is routed to either the cap or rod end of the cylinder respectively to cause it to move. In the final one, all ports (complicated valves may have multiple of these) are blocked, cutting liquid flow completely off. Examples of directional control valves include binary and check valves.

2. Pressure ControlĀ 

As may be inferred from their name, these valves modulate pressure levels, keeping them at set values. They prevent leaks and bursting due to pressure hikes. Some types of pressure control hydraulic valves are reducing valves, sequence valves, relief valves and counterbalance valves.

3. Flow ControlĀ 

Valves in this category alter flow rate by using an adjustable port. They are often found in control circuits and utilized to change the speed of devices like motors. Adjustable, fixed flow, throttling flow and pressure compensated are all kinds of flow control valves. Some common styles (also applicable to other valve types) are ball, butterfly, diaphragm, plug and needle. The flow control mechanism varies with these designs.

These are very broad umbrellas. Hydraulic valves may be further subdivided by type, configuration, style, actuation method and more.