What are the types of Directional control valves which are used in the Fluid power circuits?

directional control valve are most fundamental parts in hydraulic machinery the allow fluid fllow into diffrent paths from one or more source they usually consists of a spool in side cylender  wich is mechanically or electrically controlled

Hand lever directional control valve, solenoid operated directional control valve. The valve will have different types of spools such as C,E,G,J,H S depending upon the application.The cdirectional control valve will have two package system or three package system.

The Direction Control Valves are classified:

1. Based on No. of inlet & outlet ports .

2. Based on actuation used.

Based on the number of inlet & outlet Port the types are :

a)2/2 Valve

b)3/2 Valve

c)4/2 Valve

d)5/2 Valve

e)5/3 Valve

Based on the actuation used types are:

a) Solenoid operated (Electrical)

b) Pilot operated (Operated by Air)

c) Ultrasonic 

d) Mechanically operated 

e) Manually operated 

There are many different types and classified in different ways. 

• 1.Number of Ports
• 2.Number of Positions
• 3.Actuating Methods
  • 3.1Manually Operated
  • 3.2Mechanically Operated
  • 3.3Hydraulically Operated
  • 3.4Solenoid Operated
• 4Type of Spool

Also classified according to position of switches and types of ports. Example:2 way2 position valve and4 way2 position valves.