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22.2mm 7/8 Inch Bus AC Hose Lightweight 420g/m SAE J2064 JUNZE
22.2mm ID 7/8 inch bus AC hose at 420 g/m — the lightest in the range. 4-layer, 3.5 MPa working / 15.0 MPa burst, 125mm bend radius, R134a and R1234yf rated.
- Commodity name: 22.2mm 7/8 Inch Bus AC Hose Lightweight 420g/m SAE J2064 JUNZE
- Description
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Counter-intuitively, the 22.2mm version is lighter than the 19mm one: 420 g/m against 428 g/m. It comes from a 4.0mm wall instead of 4.5mm, which is what lets a larger bore weigh less per metre.
That matters on long roof-mounted runs where every kilogram is carried by the ceiling structure. Working pressure holds at 3.5 MPa with a 15.0 MPa minimum burst, and the bend radius is 125mm — 20mm more than the 19mm size, so plan the routing corners accordingly.
Parameter Specification Product Name Air Conditioning Hose For Bus Standard SAE J2064, SAE J3062, QC/T664-2019 Model A22 Construction 4 Layers Applicable Refrigerant 适用制冷剂 R134a / R1234yf Inner Diameter 22.0 ± 0.5mm Nominal Size 22.2mm / 7/8" Outer Diameter 30.0 ± 0.6mm Wall Thickness 4.0mm Wall Thickness Difference 0.6mm max Working Pressure 3.5 MPa max Burst Pressure 15.0 MPa min Bend Radius 125mm Weight 420 g/m Working Temperature -40°C to +135°C Typically specified on the mid-capacity circuits of coaches and intercity buses, where the 19mm line is too restrictive for the flow but the 28.5mm line would be oversized and harder to route.
Available in continuous lengths or cut to length. Each batch ships with its pressure test record.
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At Junze, we are committed to developing industry-leading, innovative products. We meet this goal by constantly striving to better understand what the installer wants and prefers, then bring it to life. all manufacturing processes from raw materials to final assembly are produced in-house, giving us complete control over the quality and consistency of our products.

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