Vents & Vacuum Breakers

Convector Steam 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 11⁄2 psig (0.1 bar)*
  • Maximum pressure 10 psig (0.7 bar)

Model 41 Part No. 401455
Model 43 Part No. 401458
Model 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
Model 71B Part No. 401464
Model 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)

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