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3-AV Cast Iron Air Vent

The Armstrong 3-AV Cast Iron Air Vent is engineered for reliable performance in industrial steam and HVAC systems. Built with a ASTM A48 Class 30 Cast Iron body, this air vent delivers efficient operation and long service life.

Key Features

  • Automatic air venting — no manual operation required
  • Thermostatic element prevents steam loss
  • Improves heat transfer efficiency
  • ASTM A48 Class 30 Cast Iron body construction

Applications

Designed for commercial and industrial steam systems where reliable air removal is essential.

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  • Brand
  • Connection Type
  • Connection Size
  • Maximum Operating Pressure (PSI)
  • Orifice Size (In.)
  • Body Material
Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days
Connection Size 3/4″ (20 mm), 1″ (25 mm)
Connection Type Screwed NPT
Body Material ASTM A48 Class 30 Cast Iron
Maximum Operating Pressure (PSI) 21, 45, 72, 96, 144, 206, 250
Orifice Size (In.) 1/4", 3/16", 5/32", 5/16", 1/2", 3/8", 7/32", 9/32"
Brand Armstrong International
Brand: Armstrong International
Connection Type: Screwed NPT
Body Material: ASTM A48 Class 30 Cast Iron