Historical
ISO 11419:1997
Agricultural irrigation equipment - Float type air release valves
This International Standard gives the structural and operational requirements and test methods for float-type air release valves, hereinafter referred to as air release valves. These valves are intended for operation in irrigation systems with water whose temperature does not exceed 60 °C, and which may contain chemicals of the types and concentrations generally in use in irrigation.
This International Standard applies to air release valves, with a nominal size of 15 mm (1/2 inch) to 150 mm (6 inch), which are operated by a float which acts as the sealing member or which directly activates the sealing member.
This International Standard applies to air release valves which are intended to allow entry of air into the pipe system from the atmosphere (“vacuum relief”) and/or release of air from the pipe system to the atmosphere.
International Organization for Standardization [iso]