Parker Hydraulic Group
VG35EH Series Open-Center Directional Control Valve

Key Features

  • A global solenoid (pwm) that can be used for proportional or on/off control. The connector options are Amp Jr., Deutsch and Weather Pak.
  • Work sections rated to 275 Bar (4000 PSI): 4-way, 3-position; and 3-way, 3-position.
  • A pilot generating/regulating section that is referred to as a utility section. The purpose of this section is to generate and regulate pilot pressure in an opencenter circuit. This section is positioned adjacent to the inlet
  • An outlet that can accept an external regulated signal. This is an option, when a pilot generating/ regulating or utility section is not required.
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Benefits

  • The pressure required to move the spools is generated and regulated internal to the VG35 valve. This eliminates the need for any in-line devices and the associated plumbing which saves installation cost.
  • No impact on open-center pressure drops when the main spools are in neutral. This is because pressure generation is “triggered” to on, only when a spool is selected. The benefit is less heat generation and reduced fuel consumption.
  • No impact on loop pressure drops: P-A/B & A/B-T which maximizes horsepower utilization. The utility section maintains pilot pressure to the solenoids with over-running loads. This ensures that productivity is not adversely affected during a pump over-demand condition.
  • A dedicated solenoid drain to the reservoir optimizes solenoid performance. This translates into consistent metering and machine controllability.
  • The pressure generating/regulating section has a selective “solenoid dump” option. In the normal position, the de-energized solenoid routes the regulated signal to the reservoir. To operate the main control valve, the solenoid must be energized. The benefit is “selective” operation of the VG35 control valve.

The VG35 has been a strong and reliable player in the 170-246 LPM (45-65 GPM) open-center, directional control valve market for many years. Now it has a new, electrohydraulic package designed for open-center systems and for those customers wanting to take machine control to the next level.