Page 4 of catalogue Ball valves of Erhard GmbH & Co. KG

ERHARD Ball Valves for Water and Waste Water
Typical Examples of Applications
➬ Isolating Valve for high pressures and flow velocities ➬ Drain and/or Washout Valve ➬ Safety/emergency isolating valve in bottom outlets or hydroelectric power Plants ➬ Economical inlet/starting valve upstream of turbines/downstream of Pumps ➬ Main burst safety valve in water supply and hydroelectric plants ➬ Universal isolating valve for water supply and for sewage and waste-water engineering with convincing features (flushing effect, swabbing of pipeline possible, etc.) ➬ and many others - references available.

Scope of Supply/Service
➬ Sizes DN 80 -1200 ➬ Pressure ratings PN 10 -160 ➬ Range of temperatures up to +130 °C Materials ➬ Body/ball depending on pressure rating: cast iron GG-25 ductile cast iron GGG-50 GGG-40.3 cast steel GS-C25N GS-24Mn5 ➬ Profile ring/elastomers (depending on flow medium and PN): NBR, EPDM, PTFE/carbon, PUR ➬ Seat, shafts, wetted Bolts: stainless steel ➬ Bearing bushes: bronze, maintenance-free ➬ Special materials according to flow medium and customers’ specification Surface protection systems ➬ EKB epoxy coating or according to customers’ specification

Operating gears and actuators
For operating the Ball valves, the approved Line of ERHARD Operating Gears and Actuators is available as follows: ➬ Travelling-nut/slider crank gearbox, directly or remoteoperated, manual or electric ➬ Pneumatic and Hydraulic actuators ➬ Special actuators as e.g. weight-loaded hydraulic actuator (see separate leaflet)

Design/Dimensioning
The following data are necessary for choosing a Ball Valve or preparing a quotation: ➬ Size DN ➬ Pressure rating PN ➬ Application: Isolating, washout/drain, safety device, main burst safety valve .... ➬ Operating conditions: flow velocities/flow rates, pressure conditions (static/dynamic) ➬ Flow medium (water/waste water), analysis if available ➬ Operating gear or actuator ➬ Situation of installation (space requirement, configuration, etc.) ➬ Other specifications

ERHARD Ball Valve
➬ Competent advice, supply, and service from the valve and actuator to measuring and Control engineering. ➬ Please, contact us! We will be glad to help you.

Postfach 1280 · D-89502 Heidenheim Phone: (0 73 21) 3 20-0 · Fax: (0 73 21) 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 the Federal Republic of Germany. WH 10/99