Page 509 - Mechatronics with Experiments

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JWST499-c07
JWST499-Cetinkunt
ELECTROHYDRAULIC MOTION CONTROL SYSTEMS 495

(a)

p t b a

p t b a

p t b a

(b)

FIGURE 7.71: (a) Manifold block for valve mounting and internal piping: examples of manifold
blocks, and a manifold block with valves mounted on it. (b) Sandwich style mounting blocks:
typically used to integrate a directional or proportional valve function with additional functions
such as relief valve, check valve, and pressure reducing valve functions. Reproduced with
permission from Parker Hannifin.

3. Valve actuation methods:
(a) Directly actuated by a solenoid with ON/OFF or proportional control.
(b) Two-stage actuation with the pilot pressure in the final actuation stage being
proportional to the first stage command signal. The command signal may be
generated by manual controls or solenoid.
(c) Three-stage actuation for very large flow rate applications.

In general, a manifold base plus a set of cartridge valves results in integrated hydraulic
valve systems with low leakage and reliable operation. Cartridge valves can perform the