Smith Flow Control's Technology Makes Valve Interlock Adjustment Effortless

MUMBAI, June 17, 2014 /PRNewswire/ --

Important Note: This press release is only meant for the Indian market. Any release outside India is not authorized. 

Trapped-key interlocks offer enhanced safety and efficiency for the most difficult process management challenges. Mounted directly to valves, interlocks ensure a process only happens in the correct operational sequence.

Photo: http://halmapr.com/news/india/files/2014/06/GLM-Handwheel-operated.jpg

Trapped-key Interlocks for handwheel-operated valves are different from those for lever-operated valves, as the latter only have a finite movement (normally 90 degrees). Interlocks on handwheel-operated valves, however, usually require several full revolutions between the locked open and locked closed positions.

Photo: http://halmapr.com/news/india/files/2014/06/Mechanical-Interlocks.jpg

Because of this, handwheel operated interlocks need to be able to 'count' the number of handwheel turns in order to release keys in the required open and/or closed positions. Similarly, with gate and globe valves, the closed position can vary through the effects of valve seat wear. After a period of use, the closed position on gate and globe valves may have altered. This can mean that when the valve is shut tight, the interlock (closed) key will not release as the valve has travelled past the original set key release position.

Smith Flow Control's (SFC's) GL Interlocks are ideal for this scenario as they can be adjusted in-situ in a matter of minutes simply by operating the valve back to the original key release position in two easy steps:

1. Using the special tamperproof tool (provided), the interlock cover is removed and the set screws adjusted
2. The valve is then operated again to its shut tight (closed) position and the screws are retightened (reset) in the new position

This simple in-situ adjustment feature is unique to SFC's GL interlock and provides a fast and efficient method of maintaining valve interlocks on site.

About Smith Flow Control 

Smith Flow Control Ltd (a Halma Company) is a British company specialising in mechanical valve control equipment. This includes procedural control using mechanical valve Interlocks and activity management systems, EasiDrive portable valve actuators, FlexiDrive mechanical valve linkage systems for remote and/or simultaneous valve operation and TorkDrive, torque limiting device for the effective operation of valves.

For more information, contact  Ms. Louise Cracknell  at +44 (0) 1376 517901, email:  [email protected], or [email protected]; or visit http://www.smithflowcontrol.com   

About Halma: 

Halma, the leading safety, health and environmental technology group is a public company listed on the London Stock Exchange and has over 4000 employees in 40 subsidiaries worldwide. Halma's subsidiaries make products that protect lives and improve the quality of life for people through innovation in market leading products which make its customers safer, more competitive and more profitable. These subsidiaries are assisting India's economy in areas such as energy, manufacturing, healthcare, water and waste treatment, construction and transport. Halma has a hub office in Mumbai.

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Media Contact: Sunil Balan, [email protected], +91 22 6708 0400, Marketing Manager, Halma India