CAP-835
27
4.3.7
Minimum pressure and non-
return valve
Fig.21: Minimum pressure and non-return valve (18-
37 kW models)
Fig. 22: Minimum pressure and non-return valve (45-
185 kW models)
The minimum pressure and non-return valve
(Fig.22-1) does not open until the system
pressure has risen to 72 psi (5 bar). After
switching off the compressor the minimum
pressure and non-return valve prevents the
compressed air from flowing back out of the
network into the oil separator tank.
4.3.8
Coolers
Fig. 23: Air/oil Coolers (18-37 kW models)
The compressed air is cooled in the air after-
cooler (Fig. 23-2) before it leaves the screw
compressor via the discharge port (Fig. 23-1).
The oil is cooled by the oil cooler (Fig. 23-3) and
fed back into the oil circuit.
Fig.24: Air/oil Coolers (45-185 kW models)
The compressed air is cooled in the after-cooler
(Fig. 24-1) before it leaves the screw
compressor via the discharge port.
The oil is cooled by the oil cooler (Fig. 24-2) and
fed back into the oil circuit.
The panel (Fig. 24-3) can be removed for
cleaning the coolers.
