Valves, Actuators & Pump Control


Control valves with positioner suitable for gas and burner installations

January 2020 Valves, Actuators & Pump Control

Sliding gate valves are true all-rounders in the valve technology field and can be used for high-precision control purposes in the fields of natural gas applications, combustion and firing installations, and burner applications. The sliding gate valves from Schubert & Salzer Control Systems have successfully passed the DVGW (German Technical and Scientific Association for Gas and Water) testing according to DIN EN 16678.

Thanks to their special design, which consists of two slotted discs sliding on and sealing against each other, sliding gate valves combine high control accuracy for gas flow with near-zero leakage. Furthermore, the central throttle element, represented by the slotted discs sliding on each other, is subject to little wear so that long service life can be acieved even under extreme conditions.


Thanks to different versions designed with different materials, and the possibility of being combined with all common positioners, the valves can be used in almost all areas of gas processing, distribution and utilisation. For years, the sliding gate valves had a DVGW certification according to the DIN 3394, but, due to the updated regulations of DIN EN 16678 (safety and control devices for gas burners and gas burning appliances), sliding valves have been re-examined by the DVGW and granted the new certification.

The certification covers type GS1 sliding gate valves with both pneumatic diaphragm and pneumatic piston actuator. Consequently, all sliding gate valves of the 8021, 8043 and 8044 series are covered by the new DVGW certification.

The maximum systemic control stroke of a sliding gate valve amounts to only 8 mm. This very short stroke ensures an opening and closing time of 100 ms for the entire stroke at a resolution of 0.1% of the stroke position. This very high dynamic not only improves the regulation quality, but it also forms the basis for control circuits with very short reaction times. This has proven the key to precision and therefore highly economic gas control functions. Sliding gate valves are manufactured with the current DVGW certification in the sizes DN 15 to DN 150, for pressures up to PN 40 and for fluid temperatures from -60 to 350°C.

Top-mounted positioner with optional Ex certification

In addition to the type 8047 analog, electro-pneumatic positioners, Schubert & Salzer Control Systems also offers the 8049 digital positioner, which allows the positioning of these pneumatically driven controllers to be performed. Both the 8047 and the 8049 positioner are top-mounted. This means that the positioner is mounted in a centred position on top of the valve actuator and so does not require additional space on the side. Furthermore, this very compact design keeps all moving parts inaccessible, which maximises operational safety.

If needed, both the 8047 analog, electro-pneumatic positioner (also in the intrinsically safe Ex II2G EEx ib IIC T6 version) and the 8049 digital, electro-pneumatic positioner (in the two wire version, also applying the IS protection class according to ATEX II 2 G Ex ia IIC T3/T4) can be combined with the DVGW certified control valves.

Thanks to the DVGW certification according to the new DIN EN 16678, the sliding gate valve with its numerous advantages can keep being used as a certified component for gas installations, natural gas applications, combustion and firing installations, or burner applications.

For more information contact Kamil Maharaj, Macsteel Fluid Control, +27 31 581 7800, kamil.maharaj@macfluid.co.za, www.macsteel.co.za


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Check valve with redundant sealing
September 2020, WIKA Instruments , Valves, Actuators & Pump Control
The new model CV check valve from WIKA is designed for a wide range of applications in the process industry. Its sealing system reliably prevents backflow of liquid and gaseous media.

Read more...
Sustainability through packaging efficiency
August 2020, Valve & Automation , Valves, Actuators & Pump Control
There is probably no other term that has been used and interpreted in recent years in so many ways as the term ‘sustainability’. Originating from forestry, today the principle of sustainability is comprehensively ...

Read more...
Flow switches from Honsberg
August 2020, GHM Messtechnik SA , Valves, Actuators & Pump Control
Honsberg has introduced the FF series flow switch that offers a large switching value selection as well as a wide housing spectrum with a valve seat design. Additionally, the FF series is low maintenance, ...

Read more...
Bottling with Schubert & Salzer control valves
August 2020, Macsteel Fluid Control , Valves, Actuators & Pump Control
For the production and filling of beer and other beverages and dairy products, angle seat, sliding gate, sanitary right angle and even ball sector valves from Schubert & Salzer Control Systems are being ...

Read more...
Ceramic vs solenoid valves
August 2020 , Valves, Actuators & Pump Control
The high-performance nature of ceramic valves means they often have a greater tolerance for wear, corrosion, and high temperatures than many other types of valves.

Read more...
RS Components announces Fluke 710 valve tester
August 2020, RS Components SA , Valves, Actuators & Pump Control
RS Components has announced availability of the Fluke 710 mA Loop Valve Tester, which is an easy-to-use tool that greatly simplifies the testing of control valves, enabling the quick measurement of critical ...

Read more...
Valves for pump protection
July 2020, Valve & Automation , Valves, Actuators & Pump Control
Thyssenkrupp Steel Europe has opted for Schroeder pump protection valves during the recent overhaul of Unit 4 of its power station in Duisburg. The valves that were installed previously from another supplier ...

Read more...
Stafsjö MV standard knife gate valve
July 2020, Valve & Automation , Valves, Actuators & Pump Control
Do you want to try the MV performance? The MV is an all-round valve with a proven global track record both on dry solids and wet fluids. The valve’s ideal internal clearances lower friction and make it ...

Read more...
Advanced pump control
July 2020, Instrotech , Valves, Actuators & Pump Control
Factory automation continues to develop year on year and pumps are increasingly required to supply real-time operating data to control networks so that their performance can be monitored and adjusted ...

Read more...
Festo online configurator tool simplifies sizing of process valves
April 2020, Festo South Africa , Valves, Actuators & Pump Control
From manually operated to automated process valves, the new configurator tool for process valves from Festo makes selecting the right solution easy and less time-consuming.

Read more...