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.

Hydraulic directional control valve. In 4 3 way directional valves the centre position of the control. Hydraulic directional valve symbols introduction. A 3 way valve not only supplies fluid to an actuator but allows fluid to return from it as well.

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. They do not give any further information about the design flow orifice size etc. Figures 8 5 through 8 10 show schematic symbols for 3 way directional control valves.

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. Most of the lands often block oil flow that flow through the body of the valve. The grooves also allow gas or oil to flow around the given spool at the same time through valve body.

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. As with all fluid power components directional control valves can be represented by standard symbols published in iso 1219. 1 2 1 6 this standard provides basic symbols which differentiate between hydraulic and pneumatic fluid power media. Basics of the iso symbols.

The valve spool get shifted with respect to the valve body which opens or closes valve ports. These directional valves consist of a housing 1 control spool 2 control mechanism 3 and return spring 4. Inlet outlet and exhaust or tank. 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.

The iso symbols display only the function of the valves. Each position the valve can take is represented by a square. Namely these are the valve body valve spool actuator and spring. The direction of hydraulic fluid flow is controlled by a directional control valve.