Contractors value the 1/2" NPT female-to-female connections for straightforward installation in tight mechanical rooms

Optimized Capacity: The 3-inch depth and 4/5-ton capacity provide sufficient headspace to prevent overflow during heavy latent cooling loads

As a direct replacement for the legacy HN67ZA002A

and retighten the set screw to lock the adjustment in place

Includes OEM-grade components designed for a perfect fit and long-term reliability in the field

Siemens Building Technology ARK11 Retrofit Kit R-448A Contractors value the 1/2" NPTThe Siemens ARK11 Retrofit Kit is a field proven solution designed for the seamless integration of modern OpenAir actuators onto competitive globe valves. Engineered for HVAC valve automation, this hardware kit allows technicians to upgrade legacy infrastructure without requiring full valve replacement, significantly reducing downtime and labor costs for facility management systems. The ARK11 is specifically compatible with the Siemens SQS electronic