Excess Flow Valves are an additional feature to be used in combination with bursting discs to protect a refrigeration system from overpressure.
EXCESS FLOW VALVES
The use of excess flow valves is recommended in accordance with fact sheet AD2000 A1 and ASME Boiler & Pressure Vessel Code VIII Div.1 (paragraphs UG 125 through UG 137) when bursting discs or relief valves are being used in series or in combination. Excess flow valves keep the space between safety valve and bursting disc pressureless in case smaller leaks occur. They prevent the build-up of counter pressure. They work with a ball that gets pushed into its seat, if an overpressure occurs, e. g. when the bursting disc opens, thus preventing ventilation and enabling the safety valves to perform as intended. Furthermore pressure manometers and controllers can be connected
Technical Features
- Available in stainless steel
- Selection of body material as per German DIN EN12284, AD2000 Series W
- Working mediums: refrigerants as per EN 378 p. 1, e. g. NH3, R22, R134a; gaseous mediums
- Use of bursting discs is not permitted in a system where the maximum operating pressure is higher than 90% of the low bursting tolerance. Bursting discs are suitable for gases, but not liquids. The burst tolerance is +/- 10% or optionally +/-5%.
| Excess Flow Valves | |
| material | stainless steel |
| nominal size | appropriate for bursting discs DN 15-100 |
| nominal pressure level | DN15-25: PS 25, 40, 63
DN 32-100: PS 40 |
| temperature range | -60 °C to +150 °C |
| temperature range for
HT Valve Series | -10 °C to +200 °C |
| connection | to be connected to the bursting disc holder
via a G1/4″ or NPT1/4″ thread |
Downloads
Prestations de services
Déshydrateur d'ammoniac GEA
Un complément appréciable pour votre système frigorifique. En éliminant l'eau du cycle de réfrigération, le déshydrateur d'ammoniac est le complément idéal de tout système frigorifique à l'ammoniac, à l'instar des filtres et purgeurs.
Huiles de qualité premium pour la réfrigération à l'ammoniac PR-OLEO®
Les huiles de qualité premium pour la réfrigération à l'ammoniac PR-OLEO® sont des lubrifiants fortement raffinés obtenus par hydrocraquage en deux 2 étapes, spécialement formulés pour être utilisés dans les systèmes de réfrigération à l’ammoniac avec des compresseurs volumétriques alternatifs ou à vis.
Kits d’entretien GEA pour compresseurs à pistons
Bienvenue dans le monde de la simplicité avec les Kits d’entretien GEA pour compresseurs à pistons. Notre mission est claire : rendre votre expérience des pièces de rechange d’origine ultra-satisfaisante et vos opérations plus fluides que jamais. Pour nous, « Jouez facile, utilisez un kit » n’est pas qu’un slogan : c’est une promesse que nous ten...
GEA Insights
In for the better: Community engagement at GEA
To support community engagement, GEA offers employees one day of paid time off per year.
How a digital rotary parlor supports sustainable dairy farming
How do you lead a dairy farm into the next generation while ensuring a sustainable future and animal welfare while managing increasing complexity? This is a question almost every dairy farmer around the world must consider. The...
A strategy for the better: CEO interview on GEA's Mission 30
After reaching its Mission 26 targets two years early, GEA launches Mission 2030 strategy with focus on growth, value and making a positive impact.
