RH/C technical denomination identifies the water and non-freezing fluids refrigerators for closed circuits, manufactured by PGV for cooling capacity from 3Kw. RH/C is the ideal equipment whenever refrigerating fluids are to be employed in the production cycle conditioning, at controlled and constant temperatures. RH/C refrigerators can be placed both indoors and outdoors and ensure a perfect control over their operation thanks to a microprocessor system that allows the visual detection of anomalies by means of a check-up function, and the restoring of alarms directly by the user thanks to a “reset” microkey.
  
 

Modular galvanized structures, employed starting from RH/C7 model; semi-hermetical compressors produced by Italian leading Companies; evaporators with removable tube nest; low-noise centrifugal fans, and possibility to duct air; expansion vessel with level controller; prearrangement for parallel connection; double and independent refrigeration circuits with reducible power for models starting from RH/C25-2; by-pass valves on the hydraulic circuits to keep the evaporator capacity constant. Every equipment is manufactured in compliance with the new PED standards

 

PGV manufactures two energy-saving plants: the former is RH/C free-cooling, composed of a single structure; the latter couples a RH/C refrigerator with a convector. All these systems exploit wintry cold air as a cooling means thus leading to lower consumption in comparison with the traditional plants with frigorific compressor.
A Free-cooling equipment looks like a normal refrigerator with a built-in air-water exchange coil, but each time the external air temperature is lower than the return temperature from a client equipment a special valve diverts the fluid to the additional coil thus excluding the functioning of the refrigeration group.
 

The mixed plant, convector – refrigerator, is ideal to cool down the oils of hydraulic power plants and the presses dies. It is possible to connect two hydraulic circuits by means of a PGV conceived switching system, so that during wintertime the convector cools also the dies, while during summertime the refrigerator helps to cool down the oil. This kind of equipment allows an electric power saving up to 50%.