PA VB 85/310 Rv and General YUB21405 blue spring trapped pressure unloader valve. At gun closure, the waterflow is discharged in bypass reducing the pressure in the system upstream of the valve

Featuring:
• Dynamic seals made up of O-ring and Back-up ring
• Optimized internal passages that guarantee reduced pressure loss
• Anti-rotation device of the piston positioned inside the valve and obtained by an hexagonal sector of the piston itself
• O-rings of the fittings positioned upstream to the thread : no risk of fittings ejected in case of overpressure
• Double feed connection
• Suitable for recycled water and strong detergents

Data Sheet

Specifications:
• Spring Color: Blue
• Permissible Pressure: 4,500 PSI
• Rated Pressure: 4,050 PSI
• Rated Flow Rate: 21.0 GPM
• Rated Temperature: 195° F
• Inlet Ports (2): 1/2" NPT F
• Outlet Port: 1/2” NPT F
• Bypass Port: 1/2” NPT F
• Replaces: 60.0485.65, VB 85/280, 60.0400.65, VB 80/280 and YUB2140
• Weight: 40.63 Oz

PA Pulsar 4 Unloader Valve 4,050 PSI with built-in Easy Start. Built-In easy start valve relieves back pressure during engine start up

Features
• NEW improved design!
• Reduced pressure loss
• Makes for easier gun operation
• Extremely reliable
• Easy maintenance
• Includes knob fitted with locknut for easy pressure adjustment
• Facilitates water discharge in pressure during start-up
• Reduces energy required for start-up

Specifications Sheet

Specifications:
• Rated Pressure: 4,050 PSI
• Permissible Pressure: 4,500 PSI
• Rated Temperature: 195° F
• Rated Flow Rate: 10.5 GPM
• Material: Steel and brass
• Inlet Port (1): 3/8" NPT-F
• Outlet Port (1): 3/8" NPT-F
• Bypass Ports (2): 3/8" NPT-F
• NOTE: Unloader Must Be Installed Vertically For Proper Operation
• Replaces Pulsar 280 #60.0006.90
• GP #: PULSAR4KHPEZ
• Weight: 26.0 oz