Optimal Control of Flows

In many industrial processes, three-way valves perform the important function of mixing or dividing flowing media. Schubert & Salzer has now developed the first three-way ball sector valve for optimised flow control of liquids and gases.
"Our approach of using the ball sector design for three-way valves is completely new. In this way, we achieve around 20 % higher Cv values than three-way valves with a conventional design," explains Reiner Wolf, Head of Mechanical Design and Development at Schubert & Salzer Control Systems. These exceptionally high flow rates are achieved with 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 Cv values.

The optimised contour of the ball sector and its backlash-free bearing, together with the actuator and positioner, ensure superior control precision. The 90-degree angle of the control allows for a very broad control range. The rangeability is 300:1. The forces of the flowing media are absorbed entirely by the bearing journals of the three-way ball sector valves, which is why pneumatic or electric actuators require only minimal actuating forces. The relatively low drive torque also remains almost constant over the entire actuating range. Changes in differential pressure therefore have little effect on the control precision of the three-way ball sector valves.

The drive can be mounted at either the upper or lower end of the shaft. This results in a particularly high degree of flexibility when it comes to adapting to different installation situations.

The three-way ball sector valves can fully exploit their control potential in particular when used in conjunction with the Type 8049 digital positioner from Schubert & Salzer. 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 planning.
Three-way ball sector valves offer particularly high added value in the temperature control and mixing processes in the steel, chemical, food and beverage industries, as well as in power generation, manufacturing of plastic and rubber products and in test benches.

Schubert & Salzer Control Systems is a rapidly growing high-tech company that develops, manufactures and sells high-precision control and shut-off valves for industrial use in process engineering applications. Based in Ingolstadt, the company offers its customers quality products "Made in Germany" either directly or through subsidiaries in the Benelux countries, England, France, India and the USA, as well as more than 40 international partners.
In terms of energy consumption, service life and noise generation, Schubert & Salzer valves are among the most efficient on the market today. Their compact design and high control performance minimise the installation and maintenance effort and ensure a high level of operational and process reliability over an exceptionally long service life.
The valves are used in the chemical and pharmaceutical industries, as well as in the production and processing of food and beverages, and in plastics, steel, paper, glass and textile manufacturing. Schubert & Salzer Control Systems offers a tailor-made solution wherever liquid, steam or gaseous media need to be controlled and shut off.

For more information, go to: controlsystems.schubert-salzer.com