Armstrong International C3510-3 Vent

The Armstrong International C3510-3, also identified as the Model 11AV-3/4-178, is a high-performance stainless steel air and gas vent designed for reliable fluid management in demanding HVACR and industrial environments. Featuring a 3/4" NPT inlet and a 1/2" NPT outlet, this free-floating lever vent provides positive venting of air and non-condensable gases under pressure. Its all-stainless steel construction ensures superior corrosion resistance, making it ideal for both internal and external exposure where chemical or environmental degradation is a risk. With a 178 PSI maximum operating pressure and a 1/8" orifice, the unit utilizes a guided lever mechanism and an elliptical float to provide high leverage for secure valve seating. The tamperproof, permanently sealed body eliminates the need for gaskets, ensuring a maintenance-free automatic air vent valve solution for hydronic heating and cooling systems, liquid chilling operations, and ozone water systems.

• Corrosion Resistance: Full 304L stainless steel construction protects against harsh fluids and environmental conditions.
• Maintenance-Free Design: The welded tamperproof body and cap eliminate internal gaskets and potential leak points.
• Positive Seating: The guided free-floating lever mechanism prevents friction and wear, ensuring a tight seal at 178 PSI.
• Application Versatility: Suitable for air/gas venting in water systems, light liquid services, and non-viscous fluid applications.
• High Capacity Venting: The elliptical float design maximizes leverage for efficient gas removal in compact spaces.

What is the difference between the C3510-3 and the 11AV-3/4-178?
These part numbers refer to the same Armstrong International unit with a 3/4" NPT connection, 1/8" orifice, and a 178 PSI rating.

Can this vent be used for ozone applications?
Yes, the stainless steel air vent construction is frequently used in ozone water systems due to its high resistance to oxidative corrosion.

Does this unit require regular gasket replacement?
No, this model features a permanently sealed, welded design that does not use gaskets, significantly reducing maintenance requirements.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.