Description
800534 ST-4 SAFETY VALVE – BA-921 – NEW
PART NUMBER(S):
Fleet Products: 800534 | Replaces OE: Bendix: 060-800534, 5005050, AV800534
DESCRIPTION:
Model: Bendix ST-4 Safety Valve
Vehicles: Bendix BA-921 series air compressors used in heavy-duty truck and trailer air brake systems
• Pressure Setting: 250 PSI
• Thread/Inlet Port: M16 × 1.5-6H
• Port Type: O-Ring Threaded Straight Thread
• Function: Pressure Relief / Pop Off
Applications:
Used on Bendix BA-921 compressor heads as a safety pressure relief valve for air brake compressor protection. The valve opens at the specified pressure setting to relieve excess pressure and is typically replaced when leaking, damaged, contaminated, or no longer holding the correct pressure setting.
CROSS-REFERENCE(S):
BW800534, K800534, 745-800534, TWDBEN800534, BEN800534, BAN800534, BX800534, ZAC800534, 800534BXW, TLA800534
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Install only into the BA-921 compressor head port matching M16 × 1.5-6H thread
✔ Verify safety valve pressure rating matches the compressor and air system requirement before installation
✔ Inspect the compressor head port and sealing surface before installing the valve
✔ Use the correct O-ring or sealing method for the straight-thread port design
✔ Confirm the valve is free of contamination and vents properly after installation
✔ Opening pressure: 250 ± 10 PSI
Warranty Information
