Descripción
Check valves open autonomously by the pressure which 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. The closing function is supported by the elastic force of the spring or by the valve disc’s own weight. RVZ check valves are designed for installation between two counterflanges that are attached directly to the valve housing. With this design the medium flow is not being diverged as it is the case for other check valve types. GEA check valves are designed for installation in the refrigerant circulation of industrial refrigeration systems. They are installed on the pressure or suction side of compressors or in pipes in which only one direction of flow is intended.
Válvulas de retención RVZ | |
diseño | recto o curvo |
material | acero o acero inoxidable |
tamaño nominal | DN 40-350 |
nivel de presión nominal | PS 25, PS 40, PS 63 |
rango de temperaturas | -60 °C a +150 °C |
conexión | conexión con brida según AWP |
otros | conexión para gas caliente cojinete lineal purga de aceite |
Check Valve type RVZ
Los lubricantes para refrigeración por amoníaco PR-OLEO® de calidad premium son lubricantes refinados hidrocraqueados de 2 etapas que están especialmente formulados para sistemas de refrigeración por amoniaco tanto con compresores de tornillo como compresores alternativos.
Complemento práctico para el sistema de refrigeración. El secador de amoníaco elimina el agua del ciclo refrigerante y constituye el complemento perfecto para el sistema de refrigeración de amoníaco junto con los filtros y purgadores.
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