Description
RA503 – QUICK EXHAUST VALVE 3/8" NPT QE3 STYLE, HIGH FLOW, INLINE MOUNT
PART NUMBER(S):
Fleet Products: RA503 | OE: RA503, QE3 | Automann:
DESCRIPTION:
Model: Quick Exhaust Valve (QE3 Style, 3/8" NPT)
Vehicles: Compatible with truck and trailer pneumatic systems requiring rapid air evacuation
• Valve Type: Quick exhaust / quick release valve
• Port Size: 3/8" NPT (all 3 ports)
• Number of Ports: 3
• Number of Positions: 2
• Flow Capacity: Cv 2.58
• Flow Rate: 155 SCFM @ 100 psi
• Actuation: Automatic via pressure differential (no manual or electric input)
• Function: Redirects exhaust air from control valves to atmosphere for rapid release
• Optional Use: Can function as a shuttle valve or check valve (with plug or orifice)
• Operating Pressure: 2 – 150 psi
• Operating Temperature Range: –25°F to 180°F (–31.7°C to 82.2°C)
• Lubrication: Not required
• Filtration: Not required
• Mounting: Inline, direct piping installation
• Construction: Aluminum diecast body with Buna N seals
• Approximate Size: 2.38" H x 1.5" W x 2.08" D
• Weight: 5 oz
• Unique Features:
– Plug EXH port to convert to check valve
– Shuttle valve compatibility
– High-flow compact design
– Reliable automatic reset and superior to sheet stock exhaust valves
Applications:
Used in air brake systems, lift axle circuits, and general pneumatic control where fast venting is needed. Ideal for truck and trailer air systems needing rapid exhaust to atmosphere. Designed to improve response time of actuators and chambers.
CROSS-REFERENCE(S):
RA503, QE3A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Use only 3/8" NPT fittings for all three ports
✔ Add muffler to exhaust port if noise reduction is required
✔ Ensure correct orientation to control port and actuator for optimal function
✔ Plug exhaust port if using as a check valve
✔ Regular inspection advised for contamination buildup in high-dust environments
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Warranty Information
