Ports (P,R) at tank pressure.
A
1
P
When hydraulic oil pressure(P A
moves to the right as shown.
P
A
Fsp+Pg A
1
1=
2
Fsp+Pg A
2
P
=
1
A
1
P=P
1
R
) reaches the preset force(F
1
2-48
A
m
h
n
g
2
) of spring(4), the plunger(3)
SP
4
g
R140LC-7
2-49
R140LC-7
2-49
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