Caleffi 553542A Filling ValveThe Caleffi 553542A Filling Valve is an automatic, pre adjustable filling valve designed for precise, reliable boiler and hydronic system fill pressure. With a 1 2 inch nominal size and end connections of Female Threaded Union x Male Threaded Union, this brass bodied valve delivers durable performance and easy field adjustments. Its compact 4 3 4 inch end to end distance, 150F temperature rating, and 230 PSI pressure rating make it suitable for a wide

The compact form factor (5

Performance Metrics: Cv 43

63-inch diameter and 10

Terminal type: Spring clip contact terminal

and FM approvals

It operates on 120–240V AC at 50/60 Hz and supports clockwise and counterclockwise rotation for flexible installation

it carries a versatile enclosure with NEMA ratings (1/2/3/3S/4/4X

Zero Differential Pressure Operation to simplify control across supply conditions

) operation

Ambient Temperature: 165°F

this actuator tolerates varied environmental conditions and delivers consistent stroke

helping maintain efficient heat cycles and reducing service interruptions