GAS-SERVEI, S.A. may use cookies on certain pages of the website, which are small data files generated on the user's computer which allow the system to remember the user's navigation preferences. These cookies are not invasive or harmful, nor contain personal data. The non acceptance of these cookies from your browser may prevent access to certain services from the website.
Cerrar | Cookies policy

Refrigerant Safety valves

Safety valves for refrigerant gases Standard series.

A complete series of pipe outlet safety valves, hole sizes from 7 to 25 mm, calibrated pressures up to 60 bar, suitable for use with all REFRIGERANT gases including CO2.


• 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.