HYDRAULIC SYSTEM REQUIREMENTS FOR POWERING HYDRAULIC TOOLS

• Hydraulic tools fallinto three general categories of flow requirements.
  • Type I 5 GPM 10% (19 LPM)
  • Type II 8 GPM 10% (30 LPM)
  • Type III 12 GPM 10% (45 LPM)

• Hydraulic systems should be capable of providing the appropriate pressure and flow for that type system when such pressure and flow are measured across the tool connection. Allowable deviation from the normal flow rates should be no more than plus or minus 10% at system pressure of 2000 psi (138 bar).

• The hydraulic system should generate no more than 200 psi (138 bar) return pressure (back pressure) at the tool when operating at maximum flow for the tool type. System conditions for this pressure are at maximum hydraulic fluid viscosity of 400 SUS (SSU) at minimum operating temperature.

• The hydraulic system should have sufficient heat rejection capacity to limit the maximum oil temperature to 140 degrees F (60 degrees C) at the maximum expected ambient temperature. Recommended minimum cooling capacities to dissipate tool generate heat are:
  • Type I 3 horsepower (2.24 KW)
  • Type II 5 horsepower (3.73 KW)
  • Type III 8 horsepower (5.22 KW)
  • The cooling capacity must take into consideration the intended duty cycle and the system generated heat.

• Hydraulic systems should have a 10 micron nominal filtration for the hydraulic fluid. Recomended filter element size it 2 or 3 times the system rated flow to prevent filter bypass under low temperature start up.

• Hydraulic systems should use hydraulic fluid which has a viscosity of 150-225 SSU at 100 degrees F (38 degrees C). Hydraulic fluids of petroleum base with anti-wear properties and high viscosity indexes over 140 will meet recommended hydraulic

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