CLASSIC

Normally closed solenoid valves for industrial applications are based on a membrane or piston direct action or servo controlled operating principle. They can be installed on three main branches of a line (liquid line, intake line, and hot gas line). In these valves when the coil is de-energised the plunger stops the fluid flow; whereas, the mobile core of the coil that electrically energises the plunger opens the valve seat connecting the inlet to the outlet. All normally closed solenoid valves are distributed in versions without the coil (S suffix) and in versions with the coil (type HF2).

In normally open solenoid valves, when the coil is de-energized the plunger opens the valve seat, connecting the inlet to the outlet. When the coil is energized, the plunger closes the fluid flow. All the normally open solenoid valves are exclusively sold in the model without coil (S suffix).

Normally open solenoid valves used for refrigeration systems exploit the membrane/piston servo control operational principle. This type, like the normally closed solenoid valve, can be installed also on three main branches of a line (liquid line, intake line, and hot gas line).

The operation of normally open solenoid valves requires the presence of a minimum inlet pressure to open the membrane (or piston) and to keep it lifted off the main nozzle; and to close the membrane (or piston), ensuring the seal of the nozzle. These valves cannot work with a zero pressure differential.

Coils with the new FAST LOCK fixing system, series 9300 and 9320, and coils with gear fixing systems, series 9110, 9120 and 9160.
Fast-on connections type DIN 43650/A for coils in series: 9120, 9160, 9300 and 9320; co-moulded cables for series 9110 coils. Protection rating IP65; IP68 for series 9160 coils coupled with series 9155 connectors.
Available voltages; 24 VAC - 50/60 Hz, 110 VAC - 50/60 Hz, 220/230 VAC - 50/60 Hz, 240 VAC - 50/60 Hz, 380 VAC - 50/60 Hz, 12 VDC, 24 VDC, 27 VDC, 48 VDC.
Connectors in series 9150, normalized DIN 43650, to wire, with IP65 protection rating. Connectors in series 9900, again normalized DIN 43650, pre-wired with various cable lengths, with IP65 protection rating. Connectors in series 9155, to wire, with IP65/68 protection rating.

Magnetic tool part number 9900/X91 can be used on all Castel normally closed solenoid valves. Used during brazing of copper connections of the solenoid valve to the line piping allows the valve to be opened and for passage of the protective gas inside the valve. This avoids damage due to overheating of both the nucleus gasket and the membrane/piston gasket.