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Gresswell Valves has an international reputation for excellence since its introduction over 40 years ago and a commitment to continuous research and product development.



Gresswell Valves, established in Birmingham in the early 1930’s, was acquired by Wrekin Shell Mouldings in 2002 and has a consistent high profile presence in the safety relief valve industry.


Gresswell Valves has emerged as a market leader & has a worldwide distributor base with the manufacture & supply of its bronze & stainless steel safety relief valves. These valves are supplied for various specifications to provide safety from potentially lethal over-pressure, e.g. boiler systems, pumps, process, shipping, oil and gas industries and enclosed pressurised systems.


In 2010 Gresswell Valves acquired, Empire Engineering, which complements its current product range with a wider range of safety relief valve types, sizes & pressure ranges.


Gresswell Valves is an ISO 9001 accredited company with its full range having CAT IV P.E.D. certification & CE marking.


Gresswell Valves ISO 9001


Gresswell Valves is approved to ISO 9001:2015.


Gresswell ISO 9001 ISO 9001 Certificate

Quality Policy


Quality Policy Quality Policy

UK Certificate of Conformity


Quality Policy UK Certificate of Conformity

EU Certificate of Conformity


Quality Policy EU Certificate of Conformity