概要
GEA check valves open autonomously by the pressure that is exerted by the working medium upon the valve disc. They start to open at a differential pressure of 0.01 to 0.05 bar and are fully open between 0.1 and 0.2 bar. As soon as the flow is interrupted or the flow direction is reversed, the valve closes automatically. Additionally, RVA stop check valves may also be closed manually with a handwheel or a ratchet attached to the lifting stem. Rotating the stem clockwise will keep the valve disc down on the valve seat and therefore keeps the valve closed, counter-clockwise rotation will enable the valve disc to be opened by the pressure of the medium. The built-in damping device makes this type of valve especially suitable in cases where the power requirement / flow rate fluctuates. GEA stop check valves are designed for installation in industrial heating and refrigeration systems. They are installed on either the pressure or suction side of compressors or in pipes in which only one direction of flow is intended. The stem sealing is provided by a threaded bush with spring-elastic PTFE ring.
RVA 停止逆止弁 | |
設計 | 直線またはアングル型 |
材質 | 鋼またはステンレス鋼製 |
公称寸法 | DN 10-200 |
呼び圧力レベル | PS 25, PS 40, PS 63 |
温度範囲 | -60 °C ~ +150 °C |
接続 | 突き合わせ溶接端 DIN、ANSI フランジ端 DIN、ANSI はんだ端 ネジ留め端 |
その他 | カバー拡張 リニアボールベアリング |
Stop Check Valve type RVA
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。
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