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Rubber and plastics hoses and hose assemblies for automotive air conditioning - Specification - Part 4: Low vibration transmission type for Refrigerant 1234yf
This document specifies the requirements for rubber hoses and hose assemblies used for low-pressure application of circulating gaseous Refrigerant 1234yf (tetrafluoropropene) (hereinafter referred to as R1234yf) in the air-conditioning systems of automobiles.
The hoses and hose assemblies are designed in such a way as to reduce vibration transmission between the engine room and the cabin.
The operational temperature range is -40 °C to +80 °C.
Due to the critical relationship between the hose and coupling for this application, a requirement that the coupling to be used in service be used for testing is laid down.
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