CBD 4500 PSI Unloader Valve The CBD 4500 PSI Unloader Valve is a must have accessory that protects your pump and system components from surge shock damage that can often occur when Spray Guns are shut Off at High Pressure. Features: • Interior Design – more efficient flow and operation • Dual Locking Nuts – vibration resistant for setting maximum pressures • New Spring Material – more resistant to fatigue, powder paint resists rusting • Piston – large diameter, more strength and contact area for shifting alignment • Discharge Nipple – sealing o-ring has been moved to the lower part of the thread, increases hydro strength and fitting strength • Shutter Valve – hex design, less contact area for smooth shifting (prevents binding). larger size, longer life and more positive shifting
