• Multiplex Hydraulic Power Unit

    Powerful technologies for advanced drilling operations


    The NOV Multiplex Hydraulic Power Unit (HPU) system is a stand-alone hydraulic supply. Integrating automated pressure control with a mixing system designed per API 16D, the HPU provides 5,000 PSI for operation of the NOV subsea multiplex system. Autonomous from the main multiplex programmable logic controller (PLC), a local PLC ensures continued pressure. Available with dual or triple triplex pumps allows sufficient flow for even the most demanding BOP requirements.

    A fully automated batch mixing system enables mixing rates of up to 150 gallons per minute. Dual filtration ensures continuous clean fluid for operation of critical subsea and surface components. Adjustable mix ratios of soluble oil, glycol and water give the user the ability to operate in cold weather, maintaining lubricity standards that protect downstream equipment.

    Linked into the system via a fiber optic TCP/IP network, operational data is continuously monitored and logged. Flow data, pressures, electrical housekeeping data, pump run times and functions are all transmitted to the primary multiplex control system.


    • Stainless Steel Reservoir
      • Mixed Tank
      • Glycol Tank
    • Soluble Oil Tank
    • Automated Batch Mixing System
    • Recirculation Pump
    • Inlet Filtration
    • Double or Triple Triplex Pump Configurations
      • Belt Driven
      • Vertical Mount
      • Hand/Off /Auto Modes
      • Staggered Pump Start Pressures
    • API 16D Compliant
    • Flow Rates up to 50 GPM per Triplex Pump
    • 5,000 PSI Max Pressure
    • Flow Meter
    • Conduct Supply Valves
    • Diverter Supply
    • External Accumulators
    • Interface with Computer Control Cabinet PLC


    • Length (in): 320/ 415" (2 Pump/3 Pump)
    • Width (in): 140"
    • Height (in): 115"
    • Weight (lbs )(WET): 65,000 / 82,000 LBS (2 Pump/3 Pump)
    • Low Temperature: -20°C
    • High Temperature: +50°C
    • Volume (Gallon): Sized Per API
    • Material: Stainless
    • Working Pressure (PSI): 5,000 PSI
    • Pumps: 2 or 3
    • Voltage: 480, 690 VAC
    • Phase: 3 Phase
    • Frequency:50-60 Hz
    • Horse Power: 150 HP
    • Flow Rate (Per Pump): 43.5 GPM @ 5,000 PSI