Submittal Sheet

88
VENTS
Vents
Model 1A Part No. 401422
Air Valve (non-vacuum)
• Float-type vent
• Adjustable port for true proportional venting –
6 port settings from slow (1) to fast (6)
•
1
⁄8" NPT angle connection
• Maximum operating pressure 1
1
⁄2 psig (0.1 bar)*
• Maximum pressure 10 psig (0.7 bar)
Model 70A Part No. 401443
Air Valve (non-vacuum)
• Float-type vent
• Single non-adjustable port
• Meets Federal Specification WW-V-151 for Type 1
Non-Adjustable Valves
•
1
⁄8" NPT angle connection
• Maximum operating pressure 11 psig (0.8 bar)*
• Maximum pressure 15 psig (1.0 bar)
Model 40 Part No. 401440
Air Valve (non-vacuum)
• Float-type vent
• For ordinary one-pipe system that doesn’t require
proportional venting
• Single non-adjustable port
•
1
⁄8" NPT angle connection
• Maximum operating pressure 6 psig (0.4 bar)*
• Maximum pressure 10 psig (0.7 bar)
Radiator Steam Vents
Air Valve
Model 1A
Air Valve
Model 70A
Air Valve
Model 40
Radiator
Steam Vent
Air Valve
Supply
Valve
Pitch Piping Down From Here
Supply Main
Typical Installation
One-Pipe Radiator System
*Drop away pressure (maximum pressure against which the vent can open).