Page 20 - Parker - L90LS Mobile directional control valve

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

Pilot filter [39]
PS
S Coarse filter with bypass function in the internal pilot TP
circuit. The filter protects the pilot circuit from dirt, espe- T
cially during start-up of the system. PS
YS Adapter for connection of external filter for pilot oil.
Enables the pilot circuit to be supplied with cleaner oil T
compared with the rest of the system.
P P2B
/ Not machined for pilot filter function
S
Tank connection for pilot circuit [40]
R
TP Separate tank connection for the pilot circuit is open.
The connection to the main tank gallery of the direc-
tional valve is blocked. The function is intended for
systems in which there is a risk of dynamic pressure
fluctuations in the tank line, which cause fluctuations in LS
the pilot circuit when there is a common tank line. T T2
TPB The end section is machined to provide a separate tank T3B
connection for the pilot circuit, and plugged. The tank
return of the pilot circuit is connected to the tank gallery
of the directional valve.
LSPB
TPX Only for end section MU [30]. The section is machined
for external connection of the pilot circuit to the tank. The R [37] internal pilot-pressure supply.
section has no internal connection between the tank S [39] coarse filter with bypass function.
return of the pilot circuit and the upper tank channels of TP [40] end section machined to accom-
the valve. The connection is plugged in the end section modate separate tank connection for pilot
face. circuit.
/ Not machined for TP connection

YS
PS
T TPB
PS

T
P P2B

R

LS
T T2
T3B

LSPB

R [37] internal pilot-pressure supply.
YS [39] adapter for connection of external
pilot-pressure filter.
TPB [40] end section machined to accom-
modate separate tank connection for pilot
circuit, and plugged.

20 Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden