this hermetic reciprocating unit maintains high volumetric efficiency and thermal stability across a broad operating envelope

Reliable Gas Control: Specifically designed for air and inert gas service

maintaining structural integrity under heavy mechanical loads

always verify your fuel type and orifice size before installation

A28AA-37 is identical to A28AA-37C

Resideo VCZAL3100 Valve 321142-301 this hermetic reciprocating unit maintainsFor contractors managing hydronic zone control, the Resideo VCZAL3100 Valve is a 3 4" NPT two way cartridge cage valve engineered for reliable performance in both chilled and hot water systems. Built with a rugged bronze body and a stainless steel stem, this 3000 series valve is specifically designed for modulating and floating control applications. It features a 4. 7 Cv rating and a linear flow characteristic, ensuring high precision regulation for