Fantini Cosmi A1 and A2 boiler feed control devices automatically regulate liquid levels in open and closed vessels. A stainless-steel float and rod transmit movement through a sealed bellows to the switching mechanism. The device provides three on/off states, manual operation and inspection through the switch-housing window.

Adjustment range: A1 15–75 mm; A2 15–30 mm. Contact ratings stated in the catalogue: 380 V, 3 A, 1.1 kW AC or 220 V, 1 A, 220 VA DC. Connections: threaded or flanged. Maximum listed pressure: 25 bar; maximum operating temperature: 200 °C. Applications include steam boilers and booster systems. Select the exact version and operating limits for the installation.