Page 21 - Parker - L90LS Mobile directional control valve

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

The L90LS is stackable and can be supplied in combinations of B A B A
1-12 spool sections. Each section can be equipped individually
with a variety of optional functions, as well as different types of
spool and spool-actuator. This enables optimum customization to
the application and particular machine function in question.
T T
Basic variants of spool section [47] P P
Spool sections are available in different variants depending on
the choice of optional functions:
OOO Not machined for pressure compensator, load-hold
check valve, feed reducer, port-relief or anti-cavitation
valves.
VOO Section fitted with load-hold check valve, but not
machined for port relief valves.
TOO Section fitted with pressure compensator, but not LS T LS
machined for port relief valves. T
TAO Section fitted with pressure compensator and feed
reduction in A-port, but not machined for port relief
valves.
TBO Section fitted with pressure compensator and feed Variant OOO. Variant VOO.
reduction in B-port, but not machined for port relief
valves. B A B A
TCO Section fitted with pressure compensator and common
feed reduction in A- and B-ports, but not machined for
port relief valves.
TTO Section fitted with pressure compensator and individual T
feed reduction in A- and B-ports, but not machined for T P
P
port relief valves.
**T All of the section variants above are available in versions
that are machined for, and can be fitted with, port relief
and/or anti-cavitation valves in service ports A and B. In
such cases, the letter T is given in the third position in
the product designation, e.g. OOT, VOT, TOT, TAT, TBT
TCT and TTT. For further information, see Port relief
and/or anti-cavitation valves [76].
MU Combined spool and end section. Shorter total valve LS LS
length. For further information, see end section [30]. T T
V** and T** have the same machining and can be converted
easily from one variant to another at any time. However, the
machining for *O*, *A*, *B*, *C* and *T* sections are different.
For further information, see also “Pressure compensator / Variant TOO. Variant TAO.
load-hold check valve [66]” and “Feed reducing valve [75]”.
Material of spool section [48] B A B A
G Spool section in grey iron. Can be used up to a pressure
setting of 260 bar in the pump connection and 280 bar in
the shock valves in motor ports.
T
S Spool section in nodular iron. T P
P
B A B A

T T
LS LS
T T
Variant **T prepared for port-relief and/or anti-cavitation valves in
service-ports A and B.
Above left: section with Y-plug in A-port and combined port-relief
and anti-cavitation valve in B-port.
Above right: section with combined port-relief and anti-cavitation Variant TCO. Variant TTO.
valves in both A and B ports.
21 Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden