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Series 8020


Our new Series 8020 is a Pressure Relief Valve that offers ultra-high flow with maximum flow rate of 80 GPM. It incorporates all the manufacturing knowledge and experience that has earned Barksdale a reputation for top quality and reliability in the market. This unit is a 3/4" NPT relief valve intended for use in hydraulic systems. All stainless steel internals and a corrosion-resistant powder-coated external housing, makes this product perfect for heavy industrial environments in the most demanding applications.



  • Ultra High flow
  • Extended seat life
  • Factory pre-set or field adjustable
  • Optional tamper-proof cap
  • Optional stainless steel housing
  • Stainless steel internals
  • Metal-to-metal seal

Technical specifications

General Specifications*

Working Pressure: Hydraulic oil up to 5500 psi (380 bar)
Process Fitting Proof Pressure: 10,000 psi (690 bar)
Max Housing Back Pressure: 1000 psi (69 bar)
Pressure Ranges: 500 - 1500 psi (35 - 105 bar)
1600 - 3500 psi (110 - 240 bar)
3600 - 5500 psi (248 - 380 bar)
Maximum Flow Rate: 80 GPM
Wetted Material:
Process Fitting:
Adjustment Stud:
Spring Retainer:
Heat-treated 410 stainless steel
316 stainless steel
304 stainless steel
416 stainless steel
Powder-coated high strength steel
Tungsten carbide
Powder-coated ductile iron
Weight: 2.5 lbs.
Pressure Connection: 3/4” NPTM x 3/4” NPTF
Orifice Size: 0.318” (typical)
Temperature Range: -40° to +200°F (-40° to +93°C)
Pressure Settings: It is recommended that cracking pressure be set 10% above working pressure.
Pressure Setpoint
Loosen hex nut with open-end wrench. Using allen key turn adjustment screw
clockwise to increase, counterclockwise to decrease set point.