WVR-SVU, WVR-SVA Dual Safety Valves and WVR SVA / SVU Dual Safety Valves with Chain Drive
GEA dual safety relief valves are designed for installation in the refrigerant cycles of industrial refrigeration systems. The safety valves which are dependent of back pressure protect refrigeration systems and their components from excess pressure (see also EN 378 part 2). They comply with the technical regulations of the German Technical Control Board (TÜV) and with AD2000 regulations. Once the set response pressure is reached GEA safety valves begin to open. They open within a 10 % pressure increase until the designed limit of the lift is reached. When the pressure drops again they start closing once the set response pressure is reached. They close completely within a pressure drop of 10 % below the set response pressure. The 3-way valve enables easy checks and maintenances of the safety valves without the system’s operation to be interrupted. One of the two outlet nozzles is always open whereas the other one is closed. So one safety valve can be inspected or even disassembled while the other one remains in service to protect the system.
WVR AL SVA / SVU Dual Safety Valves
They are available with safety valves either back pressure dependent or independent to protect the refrigeration systems and their components from excess pressure (see also EN 378 part 2). They comply with AD2000 regulations. After their initial response GEA safety valves open within 10 % of pressure increase up to the designed limitation. They close within a pressure drop of 10 % below the response pressure. The 3-way valve enables easy checks and maintenances of the safety valves without the system’s operation to be interrupted. One of the two outlet nozzles is always open whereas the other one is closed. So one safety valve can be checked or removed while the other one remains in service to protect the system. The compact design of the WVR AL requires minimum space and enables horizontal and vertical assembly. Compared to steel and stainless steel valve types the weight could be reduced by up to 30 % by using salt-water resistant aluminum EN AW-6082 as body material.
Technical Features
- 3-way valves are made of aluminum, safety valves are available in steel or 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, R134a, R290 (propane), R507 and blends with refrigerator oil; neutral, gaseous and liquid mediums; glycol-based cold brine
- Installation position: vertical as per AD2000-leaflet A2 and horizontal
- Available valve seat seals (for safety valves):
- WVR-SVUA / WVR-SVAA / WVR AL-SVAA / WVR AL-SVUA : PTFE seal, can be used at temperatures of -60 °C to +180 °C, cannot be used for response pressures of less than 10 bar.
- WVR-SVUB / WVR-SVAB / WVR AL-SVAB / WVR AL-SVUB: elastomer seal, can be used at temperatures of -50 °C to +110 °C
| WVR-SVA Dual
Safety Valves | WVR-SVU Dual
Safety Relief Valves | WVR AL SVA / SVU Dual
Safety Valves | WVR SVA / SVU Dual
Safety Valves with Chain Drive | |
| material | steel or stainless steel | steel or stainless steel | aluminum (3-way valve) steel
or stainless steel (safety valves) | steel or stainless steel |
| nominal size (inlet\outlet) | DN 15/15 – 65/100 | DN 15/15 – 65/100 | DN 15-32 | DN 15-100 |
| nominal pressure level | PS 25, PS 40, PS 63 | PS 25, PS 40, PS 63 | PS 25, PS 40, PS 63 | PS 25, PS 40, PS 63 |
| temperature range for
standard valves | WVR-SVAA: -60 °C to +180 °C
WVR-SVAB: -50 °C to +110 °C | WVR-SVUA: -60 °C to +180 °C
WVR-SVUB: -50 °C to +110 °C | WVR AL-SVAA / SVUA: -60 °C to +180 °C
WVR AL-SVAB / SVUB: -50 °C to +110 °C | WVR SVAA / SVUA: -60 °C to +180 °C
WVR SVAB / SVUB: -50 °C to +110 °C |
| connection | flanged ends as per DIN and ANSI
threaded ends | flanged ends as per DIN and ANSI
threaded ends | flanged ends as per DIN and ANSI
| flanged ends as per DIN and ANSI
|
| additional information | available with bursting discs,
bursting disc holder and excess flow valve | available with bursting discs,
bursting disc holder and excess flow valve | available with bursting discs,
bursting disc holder and excess flow valve | available with bursting discs,
bursting disc holder and excess flow valve |
Safety Valve Combinations type WVR-SVA & WVR-SVU
サービス製品
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.
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 Service Kits for reciprocating compressors
Welcome to the world of simplicity with GEA Service Kits for reciprocating compressors. Our mission is clear - to make your experience with original spare parts seamless and your operations smoother than ever. "Take it easy, use a kit" is not just a tagline – it is a promise we deliver on.
GEA インサイト
持続可能な冷凍で将来を見据えたコールドチェーンを
質の高いコールドチェーン管理の重要性を過小評価することはできません。傷みやすい生鮮食品が消費地で安全かつ高品質であることを保証することは、コールドチェーン施設を運営する人々にとって非常に大きな責任です。GEAは、低温貯蔵や配送センター向けに安全で持続可能な冷凍技術を提供する最前線に立ち、お客様の施設のエネルギー消費量と二酸化炭素排出量の削減を支援しています。
バッチ搾乳が現代の酪農を支える理由
自動搾乳における最新の進化は、バッチ搾乳を導入することです。バッチ搾乳とは、通常1日に2～3回、決まった搾乳時間に乳牛をグループ分けして搾乳する酪農方法です。自動化技術は、酪農場における乳牛の福祉、柔軟性、そして持続可能性のバランスを取りつつ、それと同時にコスト構造を継続的に最適化し、より効率的になるという、酪農家の最近の課題を克服するのに役立っています。
何もないところから
多数の国では、安全な水と衛生設備を確保することがいまだに課題となっています。汚れの混じった飲用水により病気になったり、毎日水を汲みに行くという役割を果たすため、学校に通うことができない子供たちが多数存在します。ドイツのハンブルクを拠点とする非営利団体Viva con Aguaと協力することで、GEAは一部のタンザニアの学校にきれいな水を供給する手助けをしています。
