This proposed revision of Standard 158.2 updates the references and makes minor editorial improvements. This standard provides methods of determining the mass flow capacity of refrigerant pressure regulators with sufficient accuracy to facilitate proper engineering application of these devices in systems operating at various conditions with various refrigerants. AHRI Standard 770, Refrigerant Pressure Regulating Valves, requires that this standard be used as a method of test for capacity.
ANSI/ASHRAE 158.2-2011 history
2018ANSI/ASHRAE 158.2-2018 Methods of Testing Capacity of Refrigerant Pressure Regulators
2011ANSI/ASHRAE 158.2-2011 Methods of Testing Capacity of Refrigerant Pressure Regulators