Model 4 - Part No. 401416
• Thermostatic air vent
• For steam systems and process equipment
• Operates on temperature change only;
does not close against water
• Must be installed 6-10" (150-250mm) above horizontal
return and 18" (450mm) above the boiler water line
• 1⁄2" NPT female and 3⁄4" NPT male straight shank
• Maximum operating pressure 25 psig (1.7 bar)*
• Maximum pressure 25 psig (1.7 bar)
To prevent steam vents from sputtering water or damage from water hammer, observe the minumum elevations shown.
*Drop away pressure (maximum pressure against which the vent can open).
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