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The automatic filling valve is a device consisting of a pressure reducing valve with compensating seat, visual system pressure setting indicator, an inlet filter, anti-scale internal parts, a shut-off valve (round knob on bottom) and a check valve. It is installed on the water inlet piping in sealed heating systems and it's main function is to maintain the pressure of the system at a set value, automatically filling up with water as required.
Caleffi Auto Fill Automatic Filling Valve With Pressure Setting Indicator, 553 Series, 1/2 in Nominal, Sweat x FNPT Connection, Brass, 150 deg F, 40.75 in L x 5.937 in H
| Connection Type | : | Sweat x FNPT |
| Dimensions | : | 40.75 in L x 5.937 in H |
| Material | : | Brass |
| Nominal Size | : | 1/2 in |
| Series | : | 553 Series |
| Temperature Rating | : | 150 deg F |