Figure 19. Foremost standard valve
1232
Model Code Page
90. Hydraulic system
8. 11. 1990
6000--8750 910 20
T
N
N
A
B
1
2
A
B
3
P
P
P
T
19 MPa
T
N
N
A
B
P
T
N
N
A
B
P
C
2
2
33
1 1
4
--- the foremost standard valve (order no 32536400): 1/2 ---ac-
ti o n , 3 p o s it i on s (ou t --- hold --- i n ) , s p r i n g --- r e tu r n . O u t --- p o s it i on
can be l ocked mechanically.
Function:
A: Neutral position. Oil flows from the priority valve through
the flow---through channels N to the control valve of the hy-
draulic lift.
The channels to the auxiliary hydraulics (A, B)andthenon---
return valve 2 are closed.
B: Pressure position: When the slide 1 has been moved
downwards, the middle part of the slide closes the channels
N, and its upper part opens the line to the port A. Pressure in
the channel N and in channel P increases (these channels
unite in the front end flange).
The non---return valve 2 opens and oilflowsto the auxiliary hy-
draulics via port A.
AtthesametimetheslideopensthereturnlinefromportB to
tank channel T.
C: Pressure position: Slide 1 has been moved upwards.
Flow---through channels N are closed and oil flows via port B
to the auxiliary hydraulics. Return oil flows from port A to tank
channel T
.
The change---over valve 4 is used to give a double---acting
valve a s ingle---action function. When single---acting, the
equipment hosemust be connectedto thelower connectorB.
1) Slide
2) Non---return valve
3) Centring springs
4) C h a n g e --- o v e r v a lv e
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