THREE-WAY VALVES
With the world ’ s first three-way ball sector valve , Schubert & Salzer Control Systems achieves particularly high volumetric flow rates that are virtually identical in all directions .
Text and images by Schubert & Salzer Control Systems GmbH
New three-way ball sector valve advances flow control technology
In many industrial processes , three-way valves perform the important function of mixing or splitting flowing media . Schubert & Salzer has now developed the first threeway ball sector valve for the ideal control of the flow rate of liquids and gases . “ Our approach of using the ball sector design for three-way valves is completely new . In this way , we achieve about 20 % higher KVS values than three-way valves with a conventional design ”, explains Reiner Wolf , Head of Mechanical Design and Development at Schubert & Salzer Control Systems . These extraordinarily high flow rates are achieved through the special design of the ball sector and the valve body . The resulting straight flow in one direction and the minimised flow deflection in the other result in the very high and almost identical K VS values .
Enhanced control behaviour
Superior control accuracy is ensured by the optimised contour of the ball sector and its backlash-free bearing , together with the actuator and positioner . The positioning angle of 90 degrees enables a very large control range to be achieved . The rangeability is 300:1 . The forces of the flowing media are completely absorbed by the bearing shafts of the three-way ball sector valves , which is why pneumatic or electric actuators require only very low actuation forces . The relatively low actuator torque also remains almost constant over the entire actuation range . Changes in differential pressure therefore have hardly any effect on the control accuracy of the three-way ball sector valves . The actuator can be attached to the upper or lower shaft end . This results in a particularly high degree of flexibility in adapting to different installation situations .
Optionally available with digital positioner
Especially in combination with the digital positioner type 8049 from Schubert & Salzer , the three-way ball sector valves can maximise their control potential . In addition to an Ex and FM version , the controller can also be equipped with IO-Link . This provides extensive status data for analysis and predictive maintenance . Three-way ball sector valves offer particularly high added value in the temperature control and mixing processes of the steel , chemical , food and beverage industries as well as in power generation , the manufacture of plastic and rubber products and for use in test benches .
About Schubert & Salzer Control Systems Schubert & Salzer Control Systems develops , produces and distributes highly precise industrial control and stop valves which are applied in process engineering . Based in Ingolstadt , it offers customers quality products “ Made in Germany ” directly or through subsidiaries in the Benelux , England , France , India and the USA as well as more than 40 international partners .
32 Valve World September 2024 www . valve-world . net