Brochure

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)

•

⁄8" NPT angle connection

• Maximum operating pressure 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

•

⁄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

•

⁄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

Typical Installation

One-Pipe Radiator System

*Drop away pressure (maximum pressure against which the vent can open).

Hoffman Specialty

Vents