lasdas

Electro-hydraulics
Basic level

D. Merkle

• K. Rupp • D. Scholz

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093611
E.-HYDR.LEHRB.
D.LB-TP601-GB
4/92
A. Reulecke
16.6.93, C. Paproth, M. Schwarz
A. Zimmermann
D. Merkle, K. Rupp, D. Scholz
T. Tranter

© Copyright by Festo Didactic KG, D-73734 Esslingen, 1994
All rights reserved, including translation rights. No part of this publication may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, or otherwise, without the prior written permission of Festo
Didactic KG.
ISBN 3-8127-3611-X

Table of contents

Festo Didactic

Conception of the book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table of contents

Part A: Course
1.
1.1
1.2
1.3

Introduction 9
Advantages of electro-hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fields of application of electro-hydraulics . . . . . . . . . . . . . . . . . . . . . . . 10
Design of an electro-hydraulic system . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10

Circuit and graphic symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pumps and motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Directional control valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pressure valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Flow valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Non-return valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Energy transfer and