Page 6 of catalogue Pressure and flow control valves of Erhard GmbH & Co. KG

1 ERHARD Control Valve 4 Flow Meter W Set point Y Controller output signal

2 Electronic Controller 5 Float Switch

3 Pressure Gauge with Teletransmitter 6 Pump

X Controller input parameter YR Signal feedback

Pressure Control: constant downstream pressure (Pd)

Pressure Control: constant upstream pressure (P2)

Flow Control: constant flow rate (Q)

By-pass Valve: For filling mains with the main valve in closed position

Reservoir Feeding Valve

Pump-discharge valve: Minimizing water Hammer on closing a long delivery line

Postfach 1280 · D-89502 Heidenheim Phone: +49(0)7321 320-0 · Fax: +49(0)7321 3 20-5 25 http://www.erhard.de e-mail: export@erhard.de
Data corresponding to the latest level of development, modifications reserved. Printed in Germany. 11/06 46035EN