SAE J1409:2020 pdf free

SAE J1409:2020 pdf free.Air Brake Valves Test Procedure
With the delivery port(s) open to atmosphere (delivery ports plugged on normally open or inverting type valves), increase hydrostatic pressure at the supply port at a uniform rate not exceeding 6890 kPa (1000 psi) per minute to the maximum attainable pressure not to exceed 2070 kPa (300 psi). Maintain pressure for 10 seconds and visually inspect valve. Record leakage location or damage to the valve.
With all unused ports plugged (delivery ports open to atmosphere on normally open or inverting type valves),increase hydrostatic pressure at the supply port and control port (if applicable) at a uniform rate not exceeding 6890 kPa (1000 psi) per minute to the maximum attainable pressure not to exceed 2070 kPa (300 psi). Maintain pressure for 10 seconds and visually inspect valve. Record leakage location or damage to the valve.
NOTE: Valves with two independent inlet ports, such as two-way check valves, shall be tested with one inlet port pressurized and the second open to atmospheric pressure. These valves must then be retested with the second inlet port pressurized and the first port open to atmospheric pressure.
For one-way check valves only: with the inlet port vented, increase hydrostatic pressure at the outlet port at a uniform rate not exceeding 6890 kPa (1000 psi) per minute to the maximum attainable pressure not to exceed 2070 kPa (300 psi). Record leakage location or damage to the valve.
Mount the valve in a manner that is typical of an actual service application. Install tubing into each port and allow 12 inches ±2 inches to be unsupported prior to the first tie down. Pressurize the supply port to 931 kPa±34 kPa (135 psi±5 psi).Perform a brief sinusoidal vibration test and identify any resonant frequency. Perform a random vibration test in three axis with test conditions that shall be determined by the intended design and function as agreed upon by the valve manufacturer and purchaser.SAE J1409 pdf free download.