6-14
MAIN RELIEF VALVE
This valve is a type of pilot piston to prevent hydraulic components and pipes from being broken by
high pressure so, it keeps under pressure limited.
Relief valve pressure varies by 130kgf/cm
2
in accordance with 1 revolution of adjust bolt.
8)
14
3
6
7 8
9
10
15
16
1
4
5
11
12
13
17
2
2
2
2
2
22B7HS20
1
Pilot seat
2
O-ring
3
Main poppet
4
Back up ring
5
O-ring
6
Socket
7
Main spring
8
Piston
9
Body
10
O-ring
11
Back up ring
12
O-ring
13
Pilot poppet
14
Pilot spring
15
Adjust screw
16
O-ring
17
Lock nut
