Hoffman Convector Steam Vents

Information:

• Hoffman Specialty General Catalog
• Hoffman Specialty Service Parts Catalog

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)