Use correct graphical symbols, to draw a functional "pre-fill" circuit drawing below, to charge the large single acting cylinder.
- Components:
- Uni-direction fixed displacement pump, with electric motor.
- Compound relief value.
- 4/3 indirect double solenoid, spring centered, float centre spool, D.C.V with internal pilot and drain
- Pre-fill valve. (pilot operated check valve)
- Two stage counterbalance valve with integral check valve, to control ram descent & forming bar.
- Two stage sequence valve, to pressurize the single acting ram, when the work has been contacted.
With reference to the circuit shown:
Q1. What is this type of circuit commonly called?
Q2 Fully name and state the following purpose of the previous valve.
