Parker Hydraulic Group
HV08 Series Mobile Directional Control Valve

Key Features

  • Modular construction: makes the HV08 very flexible, in that it is easy to rebuild or expand the valve at any time to meet changing needs.
  • Broad system compatibility: can be used in LS, CFC, CP and CPU systems, thus giving you the freedom to choose the hydraulic system best suited to the machine and application in question.
  • Good control characteristics: give precise control of the machine in both lifting and lowering movements.
  • Can be equipped for both multi-pump and multi-valve systems: increases further the HV08’s range of applications in different types of hydraulic system.
  • Can be flanged to specially customized function manifolds: enables the integration of even more functions (even total system solutions) into a compact, single unit that does not require any extra external hoses or pipes, thus making the installation simple, tidy and especially reliable.
  • Wide range of spool actuators for either direct or remote control: enables the valve to be located in the most practical place on the machine. The range includes both hand-operated and remote-controlled spool actuators of different types, thus enabling the best combination of economy and control characteristics to be obtained. The remote control system can be of the electric, pneumatic or hydraulic type. 
  • Individual load-hold check valves in each spool section: effectively prevent undesirable sinking of the load, thus improving operational safety. 
  • Individual port relief valves in each service port: enable port-specific limitation of maximum pressure to suit precisely the respective functions being controlled.
  • Quality and precision: quality materials and high manufacturing precision ensure a superior product with low internal leakage and long service life.
  • Simplicity and serviceability: an emphasis on simple design makes the HV08 easy to service.

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The HV08 is a load-sensing, pressure compensated directional control valve intended for use in both load-sensing systems and constant-flow systems. The valve, which is stackable, is designed for many different applications in machines such as trucks, cranes, loaders and excavators. The HV08 is of modular construction and offers unique possibilities to integrate application-adapted function solutions into the valve to form a complete, compact system solution for the machine.

Pressures

  • Pump connection max. 320 bar (4600 psi)
  • Service port max. 350 bar (5000 psi)
  • Tank connection, static max. 20 bar (290 psi)
Flow rate (recommended)
  • Pump connection max. 300 l/min* (79 USgpm)
  • Return from service port max. 250 l/min (66 USgpm)
  • * Max. recommended flow rate is dependent on choice of spool.

Feed reducer

  • Adjustment range 20 – 220 bar (290 – 3200 psi)

Internal pilot pressure

  • 25, 35 or 50 bar (applies to EHC spool actuator)
  • (360, 500 or 725 psi approx.)

Leakage from service port over spool

  • From A or B port: max. 15 cm3/min at 100 bar, temperature 50 °C and viscosity 30 mm2/s (cSt).