Pressure Unloader

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

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:
• Built-In easy start valve relieves back pressure during engine start up
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two inlet ports
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded springs and caps – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Black:
• Replaces AL606EZ, AL606XEZ, AL607EZ & AL607XEZ
• Maximum Pressure: 4,495 PSI
• Max. Volume: 8.0 GPM
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Port (1): 3/8" FNPT
• Discharge Port (1): 3/8” FNPT
• Bypass Ports (2): 3/8” FNPT
• Weight: 29.6 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:
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two inlet ports
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded springs and caps – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Black:
• Replaces AL607 & AL607X
• 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: 29.6 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: Blue
• Does not included black adjustment knob
• Replaces AL606XA
• Maximum Pressure: 3,650 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

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:
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two inlet ports
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded springs and caps – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Blue
• Replaces AL606 & AL606X
• Maximum Pressure: 3,650 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: 29.6 oz

Newly introduced Mecline VRT3 Unloader is an updated version of the Arrow Line VRT unloader with a stronger valve body with less porosity. The pressure adjustment handle was redesigned for easier operation at all pressure levels.

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:
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two inlet ports
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded springs and caps – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Yellow
• Maximum Pressure: 2,320 PSI
• Rated Flow: 10.5 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

Mecline VRT100 High Flow Unloader Valve 5,075 PSI with Dual By-Pass. Working pressures up to 4,640 PSI and flows up to 26.4 GPM

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: Green
• 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: 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: 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 Port: 1/2” F
• Weight: 38.8 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:
• 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

Specifications:
• Maximum Pressure: 3,625 PSI
• Max. Volume: 8.0 GPM
• Knob Color: Red
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Port: 3/8" MNPT
• Discharge Port: 3/8” MNPT
• Bypass Port: 3/8” FNPT
• Gauge Port: 1/4” FNPT
• Replaces MV560K Unloader
• Weight: 13.7 oz

Specifications:
• Maximum Pressure: 3,625 PSI
• Max. Volume: 8.0 GPM
• Knob Color: Red
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Port: 3/8" MNPT
• Discharge Port: 3/8” FNPT
• Bypass Port: 3/8” FNPT
• Gauge Port: 1/4” FNPT
• Weight: 13.7 oz

Specifications:
• Maximum Pressure: 2,900 PSI
• Max. Volume: 8.0 GPM
• Knob Color: Red
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Port: 3/8" MNPT
• Discharge Port: 3/8” MNPT
• Bypass Port: 3/8” FNPT
• Replaces MV540K Unloader
• Weight: 13.7 oz

Specifications:
• Maximum Pressure: 2,175 PSI
• Max. Volume: 8.0 GPM
• Knob Color: Black
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Port: 3/8" MNPT
• Discharge Port: 3/8” MNPT
• Bypass Port: 3/8” FNPT
• Replaces MV520K Unloader
• Weight: 13.7 oz

Mecline VHP51 Unloader Valve 8,000 PSI. With working pressures up to 7,250 PSI and flows up to 26.4 GPM, the VHP51 can continuously handle water up to 160° F (up to 194° F for short periods)

Featuring:
• Positioning of all o-rings before the threads, giving greater mechanical strength
• Ease of maintenance: the whole regulating unit can be totally removed from on top
• The locking ring nut has a set screw for a safer pressure setting
• A nickel-plated brass body, granting greater resistance to corrosion and overall wear
• All internal parts in stainless steel, including the outlet fitting and piston cylinder
• Internal safety lock to avoid overpressure
• Suitable for wall mount

Specifications:
• Rated Pressure: 7,250 PSI
• Permissible Pressure: 8,000 PSI
• Rated Temperature: 194° F
• Rated Flow Rate: 26.4 GPM
• Material: Chemically nickel-plated brass body. Internal parts in Stainless steel including fittings
• Inlet Port: 1/2" F
• Outlet Port: 1/2” F
• Bypass Port: 1/2”
• Replaces VHP50-500
• Weight: 40.57 Oz

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

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

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