Page 24 - Parker - L90LS Mobile directional control valve

Catalogue HY17-8504/UK Mobile Directional Control Valve
Spool Actuators L90LS

CH, CHX Feed-reducing valve [75]
CH, CHX

Stroke length limitation CHB3
P-B, A-T Qset B [72]

PC

PCH

Stroke length limitation
P-A, B-T Qset A [72]

Pressure compensator,
K [66]
Compensator restrictor [67]

Directly operated actuators with enclosed spool-ends

CH Spring-centred spool actuator
Has enclosed spool-ends for use in
aggressive environments.
Steplessly operable with spring-return
to neutral.
Spring force in neutral: 70 N
Spring force with spool fully actuated: 140 N
CH, CHX
CHX Spring-centred spool actuator
Same as CH, but with stronger springs CHB3
to compensate for friction in external CHB3
linkage arms etc.
Spring force in neutral: 85 N
Spring force with spool fully actuated: 250 N
PC
CHB3 Three-position spool actuator
Equipped with 3-position mechanical
detent that gives 3 fixed positions: PCH
neutral and fully actuated in either
direction. Spool remains in selected
position and must be moved deliberately
from one position to another.
Force needed on spool to
overcome detent: approx. 160 N

24 Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden