Hydraulic Directional Control Valve Symbols Pdf

Composite symbols can be devised for any fluid power component by combining basic symbols.

Hydraulic directional control valve symbols pdf.

They do not give any further information about the design flow orifice size etc. 1 2 1 6 this standard provides basic symbols which differentiate between hydraulic and pneumatic fluid power media. Basic check valves allow fluid to flow in one direction but prevent fluid from flowing in the opposite direction. Schemes of directional valves the description of directional valves is standardized by din iso 121.

Inlet outlet and exhaust or tank. Each position the valve can take is represented by a square. Operation hydraulic symbols directional valves type kv with direct mechanical operation by means of a lever control the direction of the hydraulic fluid medium flow. A directional control valve broadly consists of four parts.

3 way directional control valves a 3 way valve has three working ports. The spool mounted in the directional valves common known as sliding type often consists of lands as well as grooves. In 4 3 way directional valves the centre position of the control. The grooves also allow gas or oil to flow around the given spool at the same time through valve body.

Hydraulic directional control valve. Simplified symbols are shown for commonly used components. Perhaps the simplest of all directional control valves is the check valve a specific type of binary valve. The iso symbols display only the function of the valves.

Namely these are the valve body valve spool actuator and spring. A 3 way valve not only supplies fluid to an actuator but allows fluid to return from it as well. Figures 8 5 through 8 10 show schematic symbols for 3 way directional control valves. Basics of the iso symbols.

The valve spool get shifted with respect to the valve body which opens or closes valve ports. Hydraulic directional valve symbols introduction. Hydraulic schematic symbols directional control valve 4 ports 2 positions directional control valve with 4 ports and 2 finite postions directional control valve 4 ports 3 positions directional control valve with 4 ports and 3 finite postions center position can have various flow paths directional control valve 5 ports. The direction of hydraulic fluid flow is controlled by a directional control valve.