Valves, Actuators & Pump Control


Precise control with segment disc valves

October 2016 Valves, Actuators & Pump Control

Segment disc valves work on a very simple but effective principle. The central throttling elements – the segment discs that glide and seal against each other – are positioned in the valve body perpendicular to the flow direction. On a non-rotatable aligned segment disc whose geometry determines the flow rate and characteristic, a movable disc having the same number of segments is shifted by a tangentially engaging rod in such a way that the free cross-sectional area of the segments changes continuously.

Regardless of the prevailing pressure difference, a spring assembly constantly presses the movable disc onto the fixed disc. As a result, the flow direction is variable and the valve can be installed in any position.

This special design makes segment disc valves one of the few valves that combine control precision even in extreme operating conditions with a high seal tightness and very low exposure to wear.

Segment disc valves and Segment disc orifices

Perfect and variable control with high precision over a wide flow range is made possible by the segment disc valves from Schubert & Salzer. Due to the robust design and the reciprocal flow direction, segment disc valves are suitable for fluids as well as vapours, even if these are contaminated by particles. The wide range of applications includes areas such as building materials, chemical and power plants, pipelines, water supply and disposal, as well as shipbuilding.

This ingeniously simple but effective valve design is available up to nominal size DN800.

For more information contact Keith Hedges, Macsteel Fluid Control, +27 (0)82 575 9354, keith.hedges@macfluid.co.za, www.macsteel.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Process to instrument valves
November 2019, Parker Hannifin Sales Company South , Valves, Actuators & Pump Control
Parker highlights the leak elimination benefits of close-coupled instrumentation.

Read more...
Schubert & Salzer controls paper grammage precisely
October 2019, Macsteel Fluid Control , Valves, Actuators & Pump Control
The Grünewald paper company, headquartered in Austria, recently modernised its process control to improve profitability. Thanks to a new control system and a grammage-weight control valve, the company’s ...

Read more...
Valve technology for tyre presses
September 2019, Macsteel Fluid Control , Valves, Actuators & Pump Control
Production plants for tyres place extremely high demands on valves. Tyre curing presses work at high pressures of steam, water, and nitrogen, as well as at high temperatures. In addition, the very short ...

Read more...
Stafsjö valves protect installations
September 2019, Valve & Automation , Valves, Actuators & Pump Control
When it comes to industrial fire protection systems, reliability is essential. The system, which is often on constant standby for long periods, should be able to respond immediately and extinguish possible ...

Read more...
Innovation embedded in Metso’s DNA
August 2019, Metso South Africa , Valves, Actuators & Pump Control
Apart from the role in technology development, digitalisation is one of Metso’s key enablers to serve its customers better.

Read more...
Valves for molten sulphur or sulphur tail gas applications
August 2019, Valve & Automation , Valves, Actuators & Pump Control
Design engineers at Zwick have solved the ongoing problems experienced with valves on sulphur units. Typical valve problems on large bore line sizes range from seizing of the packing to severe seat damage ...

Read more...
ARCA anti-surge control valves in operation
August 2019, Valve & Automation , Valves, Actuators & Pump Control
Arca supplies its extensive range of valves to nearly all types of industries, but an important part of the product range are valves for turbines and turbo compressors, especially anti-surge control valves. ...

Read more...
Biffi Italia electric actuator launched
August 2019, Emerson Automation Solutions , Valves, Actuators & Pump Control
Biffi Italia, a leading manufacturer of high-performance and reliable valve actuation systems, has introduced the new Icon3000 electric actuator: a smart, powerful multi-turn actuator that offers improved ...

Read more...
New manifold valve design for pressure transmitters
July 2019, Emerson Automation Solutions , Valves, Actuators & Pump Control
Emerson has introduced a new manifold product family for its Rosemount pressure transmitters. Manifolds shut off or equalise pressure at the transmitter and also provide the critical mounting mechanisms ...

Read more...
Double-acting pneumatic cylinder
July 2019, Valve & Automation , Valves, Actuators & Pump Control
Stafsjö’s standard double-acting type SC pneumatic cylinder is manufactured by Ebro Armaturen. It has a solid construction and is designed for tough knife gate applications from 100 up to 320 mm bore ...

Read more...