Pressure Unloader

Featuring:
• Built-In easy start valve relieves back pressure during engine start up
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two by-pass ports

Specifications:
• Maximum Pressure: 5,650 PSI
• Max. Volume: 10.5 GPM
• Adjustable pressure
• Built-In easy start valve
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Ports (1): 3/8" FNPT
• Discharge Ports (1): 3/8” FNPT
• Bypass Ports (2): 3/8” FNPT
• Replaces AL608EZ and AL609EZ
• Weight: 2.05 lbs

General Pump ZH288 Trapped Unloader (Blue/Green) 4,060 PSI 21.1 GPM 1/2” NPT-F

Features
• Suitable for Industrial use
• Dual bypass port
• Extremely reliable
• Easy maintenance

Specifications Sheet

Specifications
• Max Volume: 21.1 GPM
• Maximum Operating Pressure: 4,060 PSI
• Maximum Temperature: 185° F
• Inlet: (2) 1/2" NPT-F
• Outlet: 1/2" NPT-F
• Bypass: 1/2" NPT-F
• Spring Color: Green
• Note: Spring color changed to green late 2022
• Dimensions: 9.15” x 3.69” x 1.81”
• Weight: 2.87 Lbs

General Pump ZH168 Trapped Unloader (White) 2,320 PSI 21.1 GPM 1/2” NPT-F

Features
• Suitable for Industrial use
• Dual bypass port
• Extremely reliable
• Easy maintenance

Specifications Sheet

Specifications
• Max Volume: 21.1 GPM
• Maximum Operating Pressure: 2,320 PSI
• Maximum Temperature: 185° F
• Inlet: (2) 1/2" NPT-F
• Outlet: 1/2" NPT-F
• Bypass: 1/2" NPT-F
• Spring Color: White
• Dimensions: 9.15” x 3.69” x 1.81”
• Weight: 2..87 Lbs

Suttner ST-265 Pressure Compensating Unloader Valve 5,070 PSI.

Features:
• Soft switching behavior
• Fatigue-free spring
• Particularly easy to maintain
• Low pressure drop
• Valve elements made of high-grade stainless steel and ceramic

Flyer

Specifications:
• Pressure:1,000 - 5,070 PSI
• Flow Rate: 13 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FPT
• Outlet Port: 3/8” FPT
• Bypass Ports (2): 3/8” FPT
• Weight: 2.10 lbs

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 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

Newly introduced Mecline VHP39 Unloader.

Featuring:
• Forged valve body – excellent strength
• Two by-pass ports

Specifications:
• Maximum Pressure: 5,650 PSI
• Rated Pressure: 5,070 PSI
• Max. Volume: 10.5 GPM
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Ports (1): G 3/8 M
• Discharge Ports (1): G 3/8 F
• Bypass Ports (2): G 3/8 F
• Weight: 2.05 lbs

• 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

Features:
• Adjustable valve allows limit setting on both maximum pressure and minimum pressure
• Straight flow-through design minimizes pressure loss through valve
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit
• Multi gun operational

Specifications:
• Maximum Pressure: 4,060 PSI
• Minimum Pressure: 500 PSI
• Flow Rate: 8 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.80 lbs

Features:
• Adjustable valve allows limit setting on both maximum pressure and minimum pressure
• Straight flow-through design minimizes pressure loss through valve
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit

Specifications:
• Maximum Pressure: 1,000 PSI
• Minimum Pressure: 200 PSI
• Flow Rate: 8 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.34 lbs

Features:
• Built-in exclusive down stream (venturi-type) injector with built in orifice provides more precise siphon rate.
• Adjustable valve allows limit setting on both maximum pressure and minimum pressure
• Straight flow-through design minimizes pressure loss through valve
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit

Specifications:
• Maximum Pressure: 3,625 PSI
• Minimum Pressure: 500 PSI
• Flow Rate: 8 GPM
• Orifice: 1.8 mm
• Injector Flow Rate: 1.5 - 2.25 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.38 lbs

Features:
• Built-in exclusive down stream (venturi-type) injector with built in orifice provides more precise siphon rate.
• Adjustable valve allows limit setting on both maximum pressure and minimum pressure
• Straight flow-through design minimizes pressure loss through valve
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit

Specifications:
• Maximum Pressure: 3,625 PSI
• Minimum Pressure: 500 PSI
• Flow Rate: 8 GPM
• Orifice: 2.1 mm
• Injector Flow Rate: 2.25 – 3.35 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.38 lbs

Features:
• Built-in exclusive down stream (venturi-type) injector with built in orifice provides more precise siphon rate.
• Adjustable valve allows limit setting on both maximum pressure and minimum pressure
• Straight flow-through design minimizes pressure loss through valve
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit

Specifications:
• Maximum Pressure: 3,625 PSI
• Minimum Pressure: 500 PSI
• Flow Rate: 8 GPM
• Orifice: 2.4 mm
• Injector Flow Rate: 3.35 – 5.0 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.38 lbs

• 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:
• Only tamper-resistant operator adjustable valve in the industry which allows limit setting on both maximum pressure and minimum pressure
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit

Specifications:
• Maximum Pressure: 3,625 PSI
• Minimum Pressure: 500 PSI
• Flow Rate: 8 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.34 lbs

Features:
• Adjustable valve allows limit setting on both maximum pressure and minimum pressure
• Straight flow-through design minimizes pressure loss through valve
• Working components constructed of high-grade stainless steel. PTFE and Viton seals for maximum heat and chemical resistance
• Internal bypass valve can be easily accessed and repaired without removing unloader from unit

Specifications:
• Maximum Pressure: 3,625 PSI
• Minimum Pressure: 500 PSI
• Flow Rate: 8 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/4” FNPT
• Weight: 1.34 lbs

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

New Design 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

Featuring:
• Forged valve body – excellent strength
• Two inlet ports
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded spring – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Black
• Does not included black adjustment knob
• Replaces AL607XA
• Maximum Pressure: 4,495 PSI
• Max. Volume: 8.0 GPM
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Ports (2): 3/8" FNPT
• Discharge Ports (1): 3/8” FNPT
• Bypass Ports (2): 3/8” FNPT
• Weight: 27.9 oz