Description
Caleffi HYGROCAL is a hygroscopic automatic air vent with manual shut-off knob. Super-compact, it is intended primarily for use with hot water radiators with 1/8″ NPT tapping or with baseboards (often with baseboard elbows) and serves as an air vent which automatically closes if the water reaches the vent level. HYGROCAL features hygroscopic discs that increase in size by 50% to form a moisture seal, preventing spills and property damage.
Made in Italy.
Technical Specifications:
- Connection: 1/8″ Male NPT threaded
- Max Operating Pressure: 150 psi (Water), 15 psi (Steam)
- Max Working Temperature: 212°F
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