Product category:
Process and OEM Valves
News Release from: GD Engineering | Subject: GD Rotalock
Edited by the Engineeringtalk Editorial
Team on 26 November 2002
Novel closures are quick, low-cost and
safe
The new GD Rotalock range of inherently safe, low-cost closures are ideal for quick and frequent access to smaller diameter and lower pressure vessels.
The new GD Rotalock range of inherently safe, low-cost closures are ideal for quick and frequent access to smaller diameter and lower pressure vessels Typical applications include filters, manways, meter provers, scraper traps, blowdowns, strainers, separators and waste disposal vessels The Rotalock's pressure warning screw (PWS) is a key feature
This article was originally published on Engineeringtalk on 19 Mar 2001 at 8.00am (UK)
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It has an integral pin that penetrates through both locking elements in the hub and cap.
When the screw is unscrewed, it warns the operator of internal vessel pressure before the cap is rotated; and complete withdrawal of the PWS also removes the locking pin so that the cap can be rotated and removed in total safety.
The PWS does not, however, function as a blowdown valve The closure hub is of SA350-LF2 forged carbon steel and no special field-welding operations are needed.
Its standard wall thickness will suit extra strong pipe but the ID may be bored to match thinner sections.
Heavier wall hubs are available.
Located in the cap to prevent operational damage, the fully-moulded lip seal is made in nitrile (NBR ) and fluroelastomer material (Viton).
The design prevents metal-to-metal binding often experienced when using O rings in quick-opening threaded closures.
Standard Rotalock closures are ASME code-stamped and furnished with U-2A partial data reports.
CE Markings for European applications are available and all materials meet the requirements of NACE Standard MR-01-75.
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