Brochure

89
Vents
Model 1B Part No. 401425
Air Valve (non-vacuum)
• Float-type vent
• Adjustable port for true proportional venting –
6 port settings from slow (1) to fast (6)
• Telescopic siphon tube
•
1
⁄4" NPT straight shank
• Maximum operating pressure 1
1
⁄2 psig (0.1 bar)*
• Maximum pressure 10 psig (0.7 bar)
Model 41 Part No. 401455
43 Part No. 401458
45 Part No. 401461
Air Valve (non-vacuum)
• Single non-adjustable port
• For small steam systems
• Telescopic siphon tube with angle cut assures drainage
•
1
⁄8" NPT straight shank (41)
1
⁄4" NPT straight shank (43)
1
⁄2" NPT female and
3
⁄4" NPT male straight shank (45)
• Maximum operating pressure 6 psig (0.4 bar)*
• Maximum pressure 10 psig (0.7 bar)
Model 71A Part No. 401470
71B Part No. 401464
71C Part No. 401467
Air Valve (non-vacuum)
• Float-type vent
• Single non-adjustable port
• Meets Federal Specification WW-V-151 for Type 1
Non-Adjustable Valves
• Telescopic siphon tube with angle cut assures drainage
•
1
⁄8" NPT straight shank (71A)
1
⁄4" NPT straight shank (71B)
1
⁄2" NPT female and
3
⁄4" NPT male straight shank (71C)
• Maximum operating pressure 11 psig (0.8 bar)*
• Maximum pressure 15 psig (1.0 bar)
Convector Steam Vents
Air Valve
Model 1B
Air Valve
Model 41, 43, 45
Air Valve
Model 71A, 71B, 71C
*Drop away pressure (maximum pressure against which the vent can open).
Hoffman Specialty
®
Vents