Hydraulic Directional Control Valve Symbols Pdf

Each position the valve can take is represented by a square.

Hydraulic directional control valve symbols pdf.

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. Basic check valves allow fluid to flow in one direction but prevent fluid from flowing in the opposite direction. Basics of the iso symbols.

Simplified symbols are shown for commonly used components. Figures 8 5 through 8 10 show schematic symbols for 3 way directional control valves. Inlet outlet and exhaust or tank. A 3 way valve not only supplies fluid to an actuator but allows fluid to return from it as well.

Namely these are the valve body valve spool actuator and spring. 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. 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.

In 4 3 way directional valves the centre position of the control. 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. Hydraulic directional control valve. The spool mounted in the directional valves common known as sliding type often consists of lands as well as grooves.

These directional valves consist of a housing 1 control spool 2 control mechanism 3 and return spring 4. 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. Composite symbols can be devised for any fluid power component by combining basic symbols.

The direction of hydraulic fluid flow is controlled by a directional control valve. 3 way directional control valves a 3 way valve has three working ports. A directional control valve broadly consists of four parts. Most of the lands often block oil flow that flow through the body of the valve.