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
Produtos de Serviço
Kits de Serviço da GEA para compressores de parafuso e alternativos
Bem-vindo ao mundo da simplicidade com os Kits de Serviço da GEA para compressores de parafuso e alternativos. Nossa missão é clara: tornar sua experiência com peças de trocar originais perfeita e suas operações mais tranquilas do que nunca. "Tenha calma, use um kit" não é apenas um slogan - é uma promessa que cumprimos.
GEA Ammonia Dryer
The GEA Ammonia Dryer removes water from the refrigerant cycle and makes the perfect addition to ammonia refrigeration systems along with filters and purgers.
Óleos de Refrigeração por Amônia de Alta Qualidade PR-OLEO®
Os óleos de refrigeração por amônia da mais alta qualidade PR-OLEO® são lubrificantes com hidrocraqueamento de 2 estágios altamente refinados formulados especificamente para uso em sistemas de refrigeração por amônia com compressores alternativos ou de parafuso.
Insights da GEA
GEA opens new technology center, strengthening its position in the growing pharmaceutical applications market
Together with Mona Neubaur, Minister of Economic Affairs of the German state of North Rhine-Westphalia, GEA CEO Stefan Klebert has opened a new technology center for pharmaceutical freeze-drying systems in Elsdorf, Germany. GEA employs approximately 260 people at the facility, which combines research and development with production and service under one roof.
