Directional control valve manufacturers offer these valves delegated with two numbers. The principal number shows the number of ports the valve has, and the subsequent number is the measure of states. For instance, a 2/2-way valve has two ports (in/out) and two states (open/shut). A 5/2-way valve has five ports and two states. Directional valves as a rule have two, three, or five ports. In the accompanying areas, the various kinds will be clarified in more detail:
The most widely recognized and most straightforward valve is the 2/2-way valve. It has two ports and two states (open and shut) and is accordingly likewise canceled a closed valve. They are utilized in pneumatic applications where the stock of air should intermittently be shut off. 2/2-way valves can be mono-steady or bi-stable. Bi-stable 2/2-way valves generally have one solenoid and are beat worked to switch state. These valves are likewise alluded to as 'locking'. Mono-stable 2/2-way valves can be ordinarily shut (opens when activated) or typically open (closes when impelled). Most of the 2/2-way solenoid valves are mono-stable and typically shut.