The Caleffi 553640 Pre-adjustable Automatic Filling Unit is designed to automatically maintain the ideal pressure in closed circuit heating systems. Equipped with 1/2" connections and an integrated pressure gauge, it supports a maximum inlet pressure of 16 bar and a maximum operating temperature of 65 °C. The pressure adjustment range varies from 0.2 to 4 bar, with a factory calibration set to 1.5 bar.
Connections: 1/2"
Integrated pressure gauge: Scale 0–4 bar
Maximum inlet pressure: 16 bar
Maximum operating temperature: 65 °C
Pressure adjustment range: 0.2–4 bar
Factory calibration: 1.5 bar
Product code: 553640