Hydraulic disc brake
  • Product class: Products Hydraulic power unit
  • A redundancy design is adopted to provide safe and reliable braking torque for the rig.
    It has working brake, parking brake, over-roll protection, an emergency brake and other functions so as to meet drilling process requirements to the fullest extent. It also has automatic protective functions for power, air and hydraulic failures.
    The hydraulic station is equipped with the dual electric pumps and multi-accumulator, the hand pump, heater and cooling system supply the reliable hydraulic power.

    The control system is valve-embedded to reduce external pipes.

    Technical parameters

    MODEL
    PZ30
    PZ40
    PZ50
    PZ70
    Max. positive pressure on one side(Ibf)
    11240.45
    16860.67
    20232.80
    Effective stroke (in)
    1.18
    Min working thickness allowed for brake shoe(in)
    0.47
    Overall dimension(in)
    Φ5.90×9.52
    Φ7.08×11.41
    Weight(Ib)
    39.68 55.11
    Safety tong
    Max. positive pressure on one side(Ibf)
    11240.45
    20232.80
    Overall dimension(in)
    Φ7.48×12.99
    Φ8.26×13.97
    Weight(Ib)
    77.16 105.82
    Hydraulic system
    Rated pressure(psi)
    857
    1143
    Summer
    L-HM46 Anti wear hydraulic oil
    Winter
    L-HV32 Low temperature anti wear hydraulic oil
    Rated flow rate of single pump (ft3/min)
    0.63
    Oil tank volume (ft3)
    5.30
    Motor power(hp)
    2.95
    Accumulator capacity  (ft3)
    4×0.22
    Heater power(hp)
    1.34
    Cooling water flow rate(ft3/h)
    70.63
    Overall dimension(ft)
    3.93×3.44×4.21
    Weight(Ib)
    1675.51

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