The Valfonta PRV53 is a self-actuated pressure relief valve designed to maintain upstream pressure in liquid, gas, and steam lines. When the inlet pressure exceeds the set point, the piston moves the obturator, opening the valve proportionally to relieve excess pressure. No compressed air or electric actuator is required.
The technical datasheet specifies a maximum inlet pressure of 10 bar with setting ranges of 0.5–3 / 1–6 / 3–10 bar. The product page lists 12 barg and ranges of 0.2–2 / 1–4 / 3–8 barg. Confirmation of version, nameplate, and set point is required for supply or replacement.
Applicable for Group 1 and Group 2 fluids, including water, compressed air, nitrogen, inert gases, fuel oil, and steam. A degreased version is available for oxygen service.
Flow direction must follow the body arrow. The valve can be installed in any position, with an upstream filter and control gauges. In bypass applications, a distance of 0.5–1 m to the isolation valve is recommended for stable compensation. Spare parts are mainly limited to gasket sets NBR, EPDM, FKM, and adjustment spring.
Documentation indicates compliance with PED 2014/68/EU, with an available ATEX technical file for category II 2 GD and ISO 9001:2015 certification for Valfonta's quality system.
Pressure excess valve PRV 53: main features
Sizes DN15 to DN25(otros consultar)
Connection Flanges (EN, ANSI) and Threaded (BSP, NPT
Fluids: Liquids, gases and steam
Body material: Stainless steel AISI 316L
Nominal pressure: PN25
Inlet pressure max.: 12 barg
Range: 0,2-2 / 1-4 / 3-8 barg
Kvs value: 0,2 to 3,5 m3/h
2014/68/UE. - Pressure Equipment Directive Certificate 2014/68/EU. (PDF)
The list of equipment included in the scope of certification of the quality assurance system according to the requirements of module D1 of directive 2014/68 / EU is explained.
ATEX - ATEX certificate of custody of the technical file LOM 14 ATEX. (PDF)
For the equipment manufactured by Valfonta: pressure reducing valves, excess pressure valves, relief valves and pneumatic control valves.
ISO 9001:2015 - System quality certificate according to ISO 9001: 2015 standard (PDF)
Certificate issued by OCA for the design, sale and marketing of globe regulation valves for the control of industrial processes.
