Schubert & Salzer Control Systems’s type 4040 ball sector valve is suitable for providing precise control and the safe shut-off of difficult media, such as abrasive suspensions of ores, coal or ash, pasty media, effluents contaminated with solids or containing fibrous matter, suspensions in the pulp and paper industry, alkalis and acids, oils, and oxygen, air or gaseous ammonia.
The key element at the heart of the new ball sector valve in the 4040 range is the ball sector. One part of the ball sector acts as the shut-off, while the other contains a hole whose diameter is normally about 80% of the nominal size of the valve. As the valve is closing, the cross sectional shape of the opening changes from completely round to elliptical.
The key element at the heart of the new ball sector valve in the 4040 range is the ball sector. One part of the ball sector acts as the shut-off, while the other contains a hole whose diameter is normally about 80% of the nominal size of the valve. As the valve is closing, the cross sectional shape of the opening changes from completely round to elliptical.
This change in shape reduces the risk of the ball sector valve becoming blocked when the valve opening is small, or draining water from suspensions, or wearing out the valve at high flow speeds. At the same time, the ball sector seals off the medium even under harshest operating conditions by means of a seat ring against the valve body.
