Section E - Hydraulics
Operation Description
Introduction to Hydraulic Schematic Symbols
E-4 E-4
9803-9570-4
Table 4. Control Valves
Used to enclose several
valves indicating they are
supplied as one unit
3-Position, 4-port spring
centered pilot operated valve
3-position, 6-port spring
centered pilot operated valve
3-Position, 4-port spring
centered solenoid & pilot
pressure operated valve
3-Position, 4-port spring
centered detent hand
operated valve
Non-return valve
Non-return valve with back
pressure spring
Pilot operated non-return
valve
One way restrictor
High pressure selector
(shuttle valve)
Throttling orifice - normally
closed
Throttling orifice - normally
open
Relief valve
Variable restrictor
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