Product category:
Seals
News Release from: HTMS | Subject: HTMS resilient metal seals
Edited by the Engineeringtalk Editorial
Team on 26 July 2007
Seals cope with harsh environments
Unlike flat gaskets, HTMS resilient metal seals have a defined spring back in a wide temperature range.
HTMS resilient metal seals solve problems for the most severe applications where the use of conventional sealing products are excluded due to temperature/pressure/radiation/permeability/fatigue/corrosion and required low fugitive emissions The ISO15848-1 standard calls for three different tightness classes, A, B and C
This article was originally published on Engineeringtalk on 19 Mar 2001 at 8.00am (UK)
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The helium leakage for Class A requires a leakage less than 5 x 10e-6mbar l/s/m seal circumference.
For a body/bonnet seal diameter of 12in, the tightness requirement in a class A would be 1.5 x 10e-6mbar l/s.
In addition to the harsh environmental conditions where valves in the oil and gas industry have to work, the operation conditions make it extremely difficult for ordinary seals to comply with LFE requirements.
High-pressure and extremes of temperatures create a lot of stress and strain on seal locations.
The company specialises in providing successful sealing solutions with its range of resilient metal seals.
Unlike flat gaskets, HTMS resilient metal seals have a defined spring back in a wide temperature range.
Soft platings in combination with a smooth groove surface finish creates He-tightness better than ISO15848-1 Class A requirements.
Both metal o rings and metal c rings are available in free heights from 0.79 to 12.7mm.
The diameter ranges from 5mm to 3m for the biggest cross section or free height.
In-house plating capabilities are silver, nickel, gold and tin.
PTFE coating is outsourced.
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