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
サービス製品
PR-OLEO® 高品質アンモニア冷凍機油
PR-OLEO® 高品質アンモニア冷凍機油は、高度に精製された二段階水素化分解潤滑油で、往復圧縮機またはスクリュー圧縮機を搭載したアンモニア冷凍システム用として特別に考案されました。
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.
レシプロコンプレッサ用GEAサービスキット
レシプロコンプレッサ用GEAサービスキットで、シンプルな世界へようこそ。GEAの使命は明確です。お客様に純正スペアパーツをシームレスにご使用いただき、これまで以上にスムーズなオペレーションを実現することです。「気楽に、キットを使って」は単なるキャッチフレーズではなく、私たちが果たす約束です。
GEAインサイト
Modern herd management: a smarter way to farm
In a dairy herd, every cow has her own story – and modern herd management tools help tell it. By tracking health, habits and needs, these smart systems let farmers care better, work smarter and keep milk flowing. It's the secret behind happy herds and successful, more sustainable dairy farming.
