Armstrong International D503157 Air and Gas Vent Refrigerant Its slender body design allows

Its slender body design allows for effortless installation with deep-socket wrenches in tight mechanical spaces

Designed to handle the rigorous high MOPD requirements of high-pressure systems

this model is designed for R-22

Key Benefits Precision Safety: Calibrated for 150°F (Open) / 120°F (Close) to prevent heat exchanger damage

Simplified Maintenance: The 1309A0037 nitrogen dioxide sensor utilizes a keyed

Armstrong International D503157 Air and Gas Vent Refrigerant Its slender body design allowsThe Armstrong International D503157 Air and Gas Vent is a high performance Series 21AR Cast Iron Fixed Pivot Ball Float designed for the efficient removal of air and gases from pressurized liquid systems. Engineered with a 1 2" NPT connection and a precision 5 64" orifice, this unit is built to manage a maximum operating pressure of 133 PSI. It is technically identical to the 21 AR 1 2 133 model, providing a robust solution for preventing air binding