Resistant to mechanical stress and environmental abuse, the Circle Seal Controls PRD thermally activated pressure relief valve is a 'true' safety device offering failsafe venting, with its special eutectic material melting consistently at a predetermined temperature to open the valve.
This has been achieved by a design which reduces the stress on the eutectic material. It is also claimed that, unlike some products, this material will not restrict flow due to the lower temperatures experienced during full flow.
The valve has been developed mainly for use in compressed natural gas vehicles and hydrogen transport applications, but also has a wide range of other potential uses. Several outlet styles are available to accommodate many different installation requirements.
A particularly robust internal design and tank mounting attitude overcomes a major concern of users in areas of extremely cold weather, as it is far less likely to experience failure previously caused by water freezing within the valve.
As well as use with new fuel tanks, the PRD eutectic relief valve is expected to find extensive application in replacing old technology within existing fleets.
Circle Seal Controls PRD pressure relief valve