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Eastman BP 25 Helicopter Transmission Lubricating Oil

Eastman BP 25 Helicopter Transmission Lubricating Oil

Developed to meet the requirements of supersonic aircraft engines, BP Turbo Oil 25 is a 5 cSt, high load carrying synthetic lubricant which has earned approval against U.S. Military specification DOD-PRF-85734 and U.K. Military specification DEF STAN 91-100/3 (DERD 2497). Designed specifically to meet the severe requirements of helicopter transmission applications while incorporating high oxidation resistance to minimize the formation of carbon, coke and sludge, BPTO 25 offers superior load carrying ability over Type II oils in helicopter gearboxes and transmissions.

BP Turbo Oil 25 has been approved by a wide range of engine and accessory manufacturers for their applicable equipment, including: GE, MTU, Turbomeca, Pratt & Whitney, Volvo Flygmotor, Rolls-Royce Ltd, Honeywell, Lucas Aerospace Ltd and Hamilton Sundstrand. Please consult your manufacturer's manuals and service bulletins for further approvals.

Shelf life extends beyond 3 years when stored in original, unopened containers in a well ventilated area away from extreme heat and moisture.

Features
  • Provides high load-carrying ability to satisfy the requirements of highly loaded gears and bearings operating in very demanding environments
  • Best load-carrying ability in its class
  • Specifications
    PROPERTIESTEST METHODRESULT
    Density @ 15°C, Kg/lASTM D12980.9950
    Viscosity, cSt, mm2/sec
    @ 98.9C
    @ 37.8C
    @ -40C

    ASTM D445
    ASTM D445
    ASTM D-2532

    5.16
    27.2
    8990
    Flashpoint, CASTM D92255
    Pour Point, CASTM D97-60
    Total Acid N°, mgKOH/gASTM D6640.38
    Evaporative Loss, % (6.5h, 204°C)ASTM D9721.8
    Foaming Chracteristics:
    Sequence 1 @ 24°C
    Sequence 2 @ 93°C
    Sequence 3 @ 24°C
    ASTM D892
    5/0.05
    5/0.03
    5/0.08
    Ryder gear
    Av. Rel. rating, % reference oil
    No. of determinations
    Ref. Oil, av. Rating, lbs./in.
    FED. TEST METHOD 6508
    167
    2
    2400
    Rubber Swell, %
    H Rubber, 72h @ 70°C
    F Rubber, 72h @ 204°C
    Tensile strength loss, %
    Appendix of DOD 85734 Spec.
    14
    14
    57.6
    Corrosion and Oxidative Stability, 72 hrs @ 175°C
    Fe, mg/cm2
    Ag, mg/cm2
    Al, mg/cm2
    Mg, mg/cm2
    Cu, mg/cm2
    Vis. change @ 38°C, %
    TAN change, mgKOH/g
    Sludge, mg/100ml
    Part 4.5.4 of DOD 85734 Spec.
    0
    -0.07
    0
    +0.08
    +0.05
    +10.3
    +0.56
    0.1
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    Part Number
    P3435602Q
    Size
    Quart Can
    Spec
    DOD-PRF-85734A
    Price
    $23.81
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    View DetailsEnable JS
    Part Number
    P3435602C
    Size
    24 Quart/Case
    Spec
    DOD-PRF-85734A
    Price
    $511.80
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: United States
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