- Motorized 24V Hydronic Zone Valves
- Manual lever provides valve operation during power failure. For use with 2-wire controls, except 3-wire for 2E164.
- 4NB76, 4NB77, 4NB79, 4NB78, and 4NB80
- Max. water temp.: 230°F
- Safe working water psi: 142
- California Proposition 65 Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.
Hydronic Zone Valve, Volts 24 VAC, Tube Size 3/4 In, Coefficient of Volume 3.5, Max Pressure Diff Across Valve 20 PSI, Height 3 5/8 In, Width 5 3/16 In, Depth 5 1/2 In, Close Time 15 Sec, Max System Pressure 142 PSI, Operating Differential Pressure 20 PSI, Max Water Temp 230 Deg F, Type of Switch Normally Closed, Connection Type Sweat, Switch Action Auxiliary