Understanding The Difference Between Directional and Proportional Valve

There is no dearth of available technologies in fluid power that is utilized to design the most efficient, cost-effective, and energy-saving system. With a wide range of valves available in the market, it can be quite confusing to understand which valve suits your industrial requirements. Out of all the different types of valves, directional valves and proportional valves are the most commonly used ones. 

Proportional Valves

A proportional valve is a valve that is used to control fluid flow rate by varying the size of the flow passage via a restrictor. These valves enable continuous combined control of flow or pressure. The regulated flow rate subsequently adjusts parameters affecting a process in a system, mainly level, pressure, and temperature.

The primary operating principle on which a proportional valve operates relies on variable DC voltage, which controls the plunger. However, in practice, static friction on the plunger’s guide points impairs the valve’s sensitivity, which results in greater hysteresis effects. 

The versatility of a proportional valve is what renders it the fame among manufacturers. The common application of a proportional valve include:

● Burner/Flame control

● Mixing of cold/warm water

● Temperature control 

● Pressure control 

If you are looking for reputed Moog proportional valves online services, NC Servo Technology can help!

Directional Valves

As the name suggests, Directional valves are used to control the direction and movement of hydraulic fluid through a system. These valves are the most fundamental parts of hydraulic and pneumatic systems, which allow fluid flow (hydraulic oil, water, or air) into different paths from one or more sources. Commonly referred to as “switching valves,” they simply direct or “switch” fluid passing through the valve from the source of flow to one of a selection of available cylinder ports. The directional control valves are composed of a moving spool situated inside the valve’s housing. An actuating force then moves the control spool, which allows the channels within the housing to be connected or separated. 

Using a directional valve is essential to every industry that relies on hydraulic circuits, machinery, and equipment, primarily because of the following reasons it has a high maximum operating capacity with good sealant characteristics and no leakage issues. 

Are you looking to buy valves or get them serviced? If so,  check out NC Servo Technology. 

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