Pressure Unloader

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

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 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

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

General Pump ZH288 Trapped Unloader (Blue) 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: Blue
• 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

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

Specifications:
• Maximum Pressure: 5,650 PSI
• Max. Volume: 10.5 GPM
• Adjustable pressure
• 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 AL608 and AL609
• Weight: 2.05 lbs

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

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

• 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

Features:
• Positioning of all o-ring seals before the threads, for greater mechanical strength
• Shutter axially guided for greater stability at high flow rates
• Stainless steel seat and shutter designed by fluid dynamics study to eliminate instabilities and turbulences with great benefit in terms of long life
• Stem with internal anti-rotation system, for greater life
• Stem o-ring seal is placed on the connecting stem guide to allow the stroke of the stainless steel stem on o-ring, increasing the life
• Hexagonal check valve for a better smoothness

Specifications:
• Spring Color: Blue
• Rated Pressure: 4,640 PSI
• Permissible Pressure: 5,075 PSI
• Rated Temperature: 194° F
• Rated Flow Rate: 26.4 GPM
• Material: Brass body & fittings
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Port: 1/2” F
• Weight: 39.33 Oz

Features:
• Positioning of all o-ring seals before the threads, for greater mechanical strength
• Shutter axially guided for greater stability at high flow rates
• Stainless steel seat and shutter designed by fluid dynamics study to eliminate instabilities and turbulences with great benefit in terms of long life
• Stem with internal anti-rotation system, for greater life
• Stem o-ring seal is placed on the connecting stem guide to allow the stroke of the stainless steel stem on o-ring, increasing the life
• Hexagonal check valve for a better smoothness

Specifications:
• Spring Color: Yellow
• Rated Pressure: 2,465 PSI
• Permissible Pressure: 2,760 PSI
• Rated Temperature: 194° F
• Rated Flow Rate: 26.4 GPM
• Material: Brass body & fittings
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Port: 1/2” F
• Weight: 38.8 Oz

Specifications:
• Spring Color: Green
• Maximum Pressure: 4,500 PSI
• Rated Pressure: 4,050 PSI
• Max. Volume: 21.0 GPM
• Adjustable pressure
• Forged brass body
• Maximum Temperature: 200° F
• Inlet Ports (2): 1/2" FPT
• Discharge Port: 1/2” FPT
• Bypass Ports (2): 1/2” FPT
• Weight: 3.1 lb

Features:
• Positioning of all o-ring seals before the threads, for greater mechanical strength
• Shutter axially guided for greater stability at high flow rates
• Stainless steel seat and shutter designed by fluid dynamics study to eliminate instabilities and turbulences with great benefit in terms of long life
• Stem with internal anti-rotation system, for greater life
• Stem o-ring seal is placed on the connecting stem guide to allow the stroke of the stainless steel stem on o-ring, increasing the life
• Hexagonal check valve for a better smoothness

Specifications:
• Spring Color: Blue
• Rated Pressure: 4,640 PSI
• Permissible Pressure: 5,075 PSI
• Rated Temperature: 194° F
• Rated Flow Rate: 26.4 GPM
• Material: Brass body & fittings
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Ports (2): 1/2” F
• Weight: 42.12 Oz

Features:
• Positioning of all o-ring seals before the threads, for greater mechanical strength
• Shutter axially guided for greater stability at high flow rates
• Stainless steel seat and shutter designed by fluid dynamics study to eliminate instabilities and turbulences with great benefit in terms of long life
• Stem with internal anti-rotation system, for greater life
• Stem o-ring seal is placed on the connecting stem guide to allow the stroke of the stainless steel stem on o-ring, increasing the life
• Hexagonal check valve for a better smoothness

Specifications:
• Spring Color: Yellow
• Rated Pressure: 2,465 PSI
• Permissible Pressure: 2,760 PSI
• Rated Temperature: 194° F
• Rated Flow Rate: 26.4 GPM
• Material: Brass body & fittings
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Ports (2): 1/2” F
• Weight: 41.59 Oz

Features:
• Positioning of all o-ring seals before the threads, for greater mechanical strength
• Shutter axially guided for greater stability at high flow rates
• Stainless steel seat and shutter designed by fluid dynamics study to eliminate instabilities and turbulences with great benefit in terms of long life
• Stem with internal anti-rotation system, for greater life
• Stem o-ring seal is placed on the connecting stem guide to allow the stroke of the stainless steel stem on o-ring, increasing the life
• Hexagonal check valve for a better smoothness

Specifications:
• Spring Color: Yellow
• Rated Pressure: 2,465 PSI
• Permissible Pressure: 2,760 PSI
• Rated Temperature: 194° F
• Rated Flow Rate: 26.4 GPM
• Material: Chemically nickel plated brass body & fittings
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Port: 1/2” F
• Weight: 38.8 Oz

Features:
• Easy construction
• Especially soft switching behavior
• Easily operated adjustment and shifting
• Adjustable minimum and maximum pressure
• Extremely long durability
• Adjustable from 850 to 5,070 PSI
• 1/2” Bypass connection

Specifications:
• Maximum Pressure: 5,070 PSI
• Minimum Pressure: 850 PSI
• Flow Rate: 8 GPM
• Max Temperature: 176° F
• Inlet Port: 3/8" FNPT
• Outlet Port: 3/8” FNPT
• Bypass Port: 1/2” FNPT
• Weight: 2.60 lbs