HAWE Hydraulics (Charlotte, NC) offers the PSL/PSV proportional directional spool valve series that can be configured for the hydraulic functions of a silage trailer. These functions include raising/lowering the tailgate or front gate, and operating the scraper floor drive and conveyor drive systems. A modular design permits adjustments via manual, remote hydraulic pilot, or electrical control. The flange-mounted design simplifies plumbing/hose runs, and uses a twin solenoid configuration that reduces wiring and allows for both proportional and on/off operation.

These load-sensing valves are designed to keep the input pressure constant without being affected by the individual work units, enabling independent pressure control between the work sections/functions of the valves. They feature operating pressures of up to 420 bar and maximum flows up to 200 lpm.

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