Hydraulic Directional Control Valve Spool Types

Design pressure unloading circuit by spool function in neutral position to achieve energy savings.

Hydraulic directional control valve spool types.

Hydraulic valves directional control valves. When the force needed to shift the main spool of the valve exceeds the practical limit of a solenoid the pilot valve uses fluid pressure to shift the main spool left or right. 3 1 for spool type directional control valves. This cutaway view of a spool type directional control valve has pilot valve.

Chief g series p80 directional control valve. Parker offers a comprehensive range of directional control valves for a wide variety of media and customer applications available in various types and configurations. We provide industrial seat and spool valves hydraulically or manually operated pneumatic solenoid and manual valves mobile monoblock and sectional valves ball valves for different applications and media control valves and. D3 indd dd a53 parker hannifin corporation hydraulic valve division elyria ohio usa catalog hy14 2500 us directional control valves a technical information series d3w interface nfpa d05 cetop 5 ng 10 max.

Dcvs will usually consist of a spool inside a cylinder which is mechanically or electrically actuated. Such type of directional control valve require good practice of maintenance as dirty hydraulic fluid will damage the valve land mating surface and therefore accuracy will not be secured as desired. For control of cylinders motors etc. When h f and g spool type in neutral position of 4way 3postion directional spool valve the oil fluid from pump.

Spring center 2 i o port 10 sae 2. Directional control valves dcvs are one of the most fundamental parts of hydraulic and pneumatic systems dcvs allow fluid flow hydraulic oil water or air into different paths from one or more sources. Some experience with the directional control valve symbol has already been gained. There will be one spool which will move to and fro i e.

4 way 3 position 2 spool action. Spool will slide in the bore in axial direction. Directional control valves hydraulic valves hydraulics prince monoblock valve brand new prince. 3 spool 4 way 3 position spring center 21 gpm 3625 psi sae 10 inlet and 12 outlet ports and sae 10 work ports 1500 3625 psi relief setting 220901.

Operating p a b. 252 81 as low as. Prince rd5200 directional control valve 25gpm rd522gcga5a4b1 item 220 201. The directional control valve symbol is the most intuitive and selfexplanatory of the symbols.