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High pressure C02 safety valves

High pressure CO2 safety valves.

Safety valves specially made to work at high pressures, hole diameters from 10 to 14 mm, maximum calibrated pressure 150 bar, perfect for new CO2 plant.


• Materials: All parts are in brass (UNI EN 12164 CW614N) except the spring which is in spring alloy steel (UNI EN 10270-I).

• To guarantee 100% safe sealing in all its refrigeration and air conditioning products, NGI has developed a special valve testing island incorporating a hydrogen system. This island is able to detect even the smallest leakage, at pressures only just below the valve’s calibrated value, and effectively avoids annoying leakage problems during the plant start-up and commissioning stages.

• Seal seats: PTFE (-196ºC / +250ºC).


Nuova General Instruments

The NGI safety valves are approved and comply with the requirements of the European Directive 97/23/EC (PED), ASME VIII Div.1; on request testing can be performed by the most prestigious authorities such as TÜV, RINA, Bureau Veritas, ABS and Lloyd’s Register. In 1995 NGI obtained the ISO 9002 quality system certification issued by Bureau Veritas Quality International Italia S.R.L, and is currently certified in compliance with the ISO 9001:2008 issued by TÜV.