P.A. Srl

• Automatic Pressure Compensating Unloader Valve
• General # YU3678
• Must Be Mounted Vertically
• Reduces trapped pressure to 25% of operating pressure when unloading
• Allows easier trigger gun pull
• Maximum Pressure: 3,600 PSI
• Max. Volume: 7.8 GPM
• Adjustable pressure
• Brass body
• Max. Fluid Temp.: 194 degrees F.
• Inlet Ports (1): 3/8" FPT
• Discharge Ports (1): 3/8” FPT
• Bypass Ports (1): 3/8” FPT
• 40.0 OZ. Weight

Featuring:
• Sturdy steel and brass construction
• By-pass control actuates at very low pressure values with reduced pressure in the delivery line when gun is shut
• By-pass control actuates at very low pressure values with reduced pressure in the delivery line when gun is shut
• Specially designed check valve prevents jamming and vibrations even in presence of sand and scales
• Safety valve built in the delivery side

Specifications:
• Unloader Valve (discharging)
• Rated Pressure: 7,250 PSI
• Permissible Pressure: 8,100 PSI
• Rated Temperature: 195° F
• Residual pressure at close down: 2,750 PSI
• Min. bypass re-start pressure: 1,600 PSI
• Rated Flow Rate: 21.0 GPM
• Material: Steel and brass
• Inlet Port: 1/2" F
• Discharge Port: 1/2” F
• Bypass Port: 1/2” F
• AR Part # AR40397
• Weight: 121.7 Oz

PA VB 200/150 Pressure Regulating Unloader Valve 53 GPM 2,450 PSI. At gun shut off, the water flow is bypassed at reduced pressure

Features:
• Sturdy steel and brass construction
• Hexagonal shaped check valve to avoid jamming
• Max pressure adjustment by screw and locknut

Specifications:
• Rated Pressure: 2,200 PSI
• Permissible Pressure: 2,450 PSI
• Rated Flow Rate: 53 GPM
• Rated Temperature: 195° F
• Inlet Port: 1” FPT
• Outlet Port: 1” FPT
• Bypass Port: 1” FPT
• Weight: 72.16 oz

PA VB 200/280 Pressure Regulating Unloader Valve 53 GPM 4,500 PSI. Pressure regulating unloader valve. At gun closure the water flow is discharged in bypass, lowering the pressure in the circuit upstream of the valve

Features:
• High flow rate
• Brass body and Sst internal parts
• Adjustable with screw and counter nut to secure the working pressure
• Slots for screw fastening

Specifications:
• Rated Pressure: 4,050 PSI
• Permissible Pressure: 4,500 PSI
• Minimum Adjustable Pressure: 410 PSI
• Max Flow Rate: 53 GPM
• Rated Temperature: 195° F
• Inlet Port: 1” BSP F
• Outlet Port: 1” BSP F
• Bypass Port: 1” BSP F
• Weight: 122.81 oz

• Trapped Pressure Unloader
• General # YVB3KA, Series 51 & 60 Pumps
• Maximum Pressure: 3,200 PSI
• Max. Volume: 6.5 GPM
• Adjustable pressure
• Brass body
• Max. Fluid Temp.: 195 degrees F.
• Inlet Ports (1): 3/8" MPT
• Discharge Ports (1): 3/8” MPT
• Bypass Ports (1): 3/8” FPT
• 14.7 OZ. Weight

Features:
• Assembly equipped with a high pressure proof compensation
• Compact dimensions
• Sturdy steel and brass construction
• Adjustable locknut to control max pressure
• Red nylon knob
• Easy maintenance

Specifications:
• Rated Pressure: 5,100 PSI
• Permissible Pressure: 5,600 PSI
• Rated Flow Rate: 10.5 GPM
• Rated Temperature: 195° F
• Adjustable pressure
• Forged brass body
• Inlet Port: 3/8" MPT
• Outlet Port: 3/8” FPT
• Bypass Port: 1/2” FPT
• Gauge Port: 1/4” FPT
• Weight: 32.5 oz

Features:
• Assembly equipped with a high pressure proof compensation
• Compact dimensions
• Sturdy steel and brass construction
• Fixing system for the max. and min. pressure setting
• Sst seat for check valve, replaceable
• Easy maintenance

Specifications:
• Rated Pressure: 5,100 PSI
• Permissible Pressure: 5,600 PSI
• Rated Flow Rate: 10.5 GPM
• Rated Temperature: 195° F
• Adjustable pressure
• Forged brass body
• Inlet Port: 3/8" MPT
• Outlet Port: 3/8” FPT
• Bypass Port: 1/2” FPT
• Gauge Port: 1/4” FPT
• Weight: 31.04 oz

• Trapped Pressure Unloader
• General # YVB7K
• Maximum Pressure: 3,600 PSI
• Max. Volume: 7.8 GPM
• Adjustable pressure
• Brass body
• Max. Fluid Temp.: 200 degrees F.
• Inlet Ports (1): 3/8" MPT
• Discharge Ports (1): 3/8” FPT
• Bypass Ports (1): 3/8” FPT
• 19.7 OZ. Weight

PA VB 80/400 Stainless Steel Unloader Valve 6,500 PSI. Pressure regulating valve equipped with double connection for inlet port. At gun shut off, the water flow is bypassed at reduced pressure

Featuring:
• Sturdy construction in Sst Aisi 303
• Return action of the piston by means of a powerful spring, for confident working and a reliable pressure adjustment
• Multiple connections for easy installation
• Hexagonal shaped check valve to avoid jamming

Specifications:
• Spring Color: Black
• Permissible Pressure: 6,500 PSI
• Rated Pressure: 5,800 PSI
• Rated Flow Rate: 21.0 GPM
• Material: Stainless Steel 303
• Rated Temperature: 195° F
• Inlet Ports (2): 1/2" F NPT
• Outlet Port: 1/2” F NPT
• Bypass Port: 1/2” F NPT
• AKA: AR # AR51248, GP # YU2158
• Weight: 47.0 Oz

PA VB 85/180 Rv and General YUB21235 white 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: White
• Permissible Pressure: 2,600 PSI
• Rated Pressure: 2,300 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: 60.0485.05, VB 85/160, 60.0400.05, VB 80/150 and YUW2121
• Weight: 40.63 Oz

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 VRP600 Safety & Pressure Regulating Valve 8,700 PSI. With rated pressures up to 8,100 PSI and flows up to 21.0 GPM

Features:
• Compensated pressure regulating valve
• Regulates the bypass of the fluid with a minimum variation of the pressure
• Suitable to be utilized as a safety valve on pressure washers
• Sturdy construction in Sst Aisi 303
• Return action of the piston by means of a powerful spring, for a secure function and reliable pressure adjustment
• Multiple connections for quick installation

AS SAFETY VALVE ONLY FOR PRESSURE WASHERS:
• Reliable intervention discharging all the flow
• Prompt and effective damping action against pressure spikes

AS A PRESSURE REGULATING VALVE:
• High balancing to guarantee slight variations of the rated pressure when the flow varies in bypass
• Usable with a multiple number of lances

Specifications:
• Rated Pressure: 8,100 PSI
• Permissible Pressure: 8,700 PSI
• Rated Temperature: 195° F
• Rated Flow Rate: 21.0 GPM
• Material: Stainless steel AISI 303
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Port: 1/2" F
• AR40398
• Weight: 33.51 Oz