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

PA VB350 / PA YU5075KMS pressure regulating unloader valve with micro switch. Pressure regulating valve connected to an electric switch, electro-mechanic type, which when reaching a preset calibrated pressure, opens or closes an electric contact. At gun shut off, the water flow is bypassed at reduced pressure

Features:
• Sturdy construction in steel and brass
• Electrical insulation: class IP55
• Electric drive shunted from valve functions with two positions 1) Unloader working in pressure 2) Unloader with all the flow in bypass
• Mechanical control of the electric switch for a simple and reliable function
• Hexagonal shaped check valve to avoid jamming
• Rotating by-pass manifold G3/8 F
• Adjustable pressure
• Forged brass body .

Technical Manual

Specifications:
• Rated Pressure: 5,100 PSI
• Permissible Pressure: 5,600 PSI
• Rated Flow Rate: 10.5 GPM
• Rated Temperature: 195° F
• Max rated voltage: 250 V
• Breaking switch: 6 (A) resistive load - 6 (A) inductive load
• Cable length : 1200 mm electric wire : 3 x 1mm2
• Cable max ampere: 10 A
• Environment temperature: 75 °C Type of action: 1C
• Electrical component lifr: 50.000 commutationsi,T.85°C,a 250V in line with CEE 24- VDE 0630
• Inlet Port: 3/8" Bsp M
• Outlet Port: 3/8” Bsp F
• Bypass Port: 3/8” Bsp F
• Gauge Port: 1/4” Bsp F
• Weight: 42.75 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