HR4 is a low-pressure, high-temperature return line or suction line for petroleum- and water-based hydraulic
fluids. It has a vacuum rating of 25 in Hg. HR4 has half the bend radius of the typical SAE 100R4.
- Meets or exceeds the performance requirements of
- SAE 100R4
- SAE J1942 / U.S. Coast Guard
- MSHA Flame Resistant Cover