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Gresswell Valves G55 General Purpose Pressure Relief Valves
In order to prevent a safe pressure being exceeded in pressurised systems, Gresswell Valves have produced the G55.
The lift is proportional to the system overpressure. The G55 is particularly suitable for most liquid applications where a 'small' discharge often prevents the safe pressure in a system being exceeded.
The Gresswell G55 is also suitable for steam, gases & vapour applications where a low discharge is suitable.
Size Range:
 DN15-DN80 (½" - 3")
Pressure Range:
0.5 Bar.g (7 PSI) to 20.7 Bar.g (300 PSI)
Pipe Connections:
Male Inlet x Female Outlet.
Inlet: Threaded 'G' BSP Male to BS EN ISO 228/BS 2779
Outlet: Threaded 'Rp' Parallel Female to BS 21/BS EN 10226/ISO 7
Alternative thread standards, i.e. BSPT or NPT are available upon request.
Flanged connections also available. Most flange standards can be accommodated.
Features and Benefits:
Gresswell Valves are quality assurance approved to BS EN ISO 9001: 2008 and manufactured in accordance with BS EN ISO 4126-1 & BS6759.
Full Cat IV PED approval.
Only 4 springs are needed to cover the full pressure range.
Clear operating and maintenance instructions are supplied with each despatch.
Screwed/Flanged or a combination of both are available as standard.
See data sheets for Discharge Capacities.
Testing:
All Gresswell Relief Valves are given a hydraulic seat tightness test before leaving the factory and all valves are supplied pre-set. Special tests or witness testing can be arranged at extra cost.
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Data Sheet
G55 Discharge Capacities
Pricing:
For pricing information, please fill out this Enquiry Form and
we shall reply with a quotation to match your specifications. Unfortunately, we are unable to price these products over the telephone.
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