HYDAC Clogging Indicator VD VR Series | VD5D.0/-V-L24 | VR2D.X/-V-L24

LIC Hydraulic offers the HYDAC VD & VR Series clogging indicators, the ultimate diagnostic tool for hydraulic filter maintenance. The VD series is engineered for high-pressure line filters (up to $420\text{ bar}$), while the VR series is designed for return-line monitoring (up to $20\text{ bar}$). These indicators, such as the VD5D.0/-V-L24, monitor the differential pressure across the filter element. Once the pressure reaches a pre-set threshold (indicating a clogged element), the unit triggers a visual alert or an electrical signal to the PLC. Our HYDAC-compatible indicators ensure your system stays protected from contamination-related downtime with 100% original performance and fit.

Technical Specifications (Bulleted List)

• Types: VD (Differential Pressure, High-Pressure) / VR (Differential Pressure, Return-Line).

• Operating Pressures: Up to $420\text{ bar}$ (VD) / $20\text{ bar}$ (VR).

• Setting Values: $2\text{ bar}, 5\text{ bar}, 8\text{ bar}$ (customizable).

• Output Options: Visual (Pop-up), Electrical (Switch), or Combination (Visual + Electrical LED).

• Sealing: NBR (Standard) or Viton (V) for high-temperature and fire-resistant fluids.

• Voltage: $24\text{V}, 110\text{V}, 230\text{V}$ AC/DC options.

Key Technical Advantages

• Reliable Piston-Spring Logic: Unlike simple diaphragm switches, the HYDAC piston design offers superior durability and resistance to pressure spikes, ensuring a long service life.

• Cold-Start Suppression: Models like the -L24 series often include thermal lockouts. This prevents false alarms during cold machine startups when high oil viscosity mimics a clogged filter.

• Robust Electrical Protection: Rated up to $IP65$ protection, these switches are built to survive the vibrating and humid environments of industrial power units and mining equipment.

• Standardized Interfacing: Built to comply with $ISO$ and $DIN$ standards, allowing for easy integration into existing filter housings from HYDAC, Pall, or Rexroth.

Application Areas

• Power Units: Monitoring critical high-pressure line filters to protect expensive piston pumps.

• Lubrication Systems: Ensuring clean oil flow in large-scale gearboxes and turbine systems.

• Mobile Machinery: Keeping hydraulic excavators and loaders running by signaling return-line filter changes.

Expert Maintenance Tips

• Visual Check: During routine walk-arounds, always check the visual pop-up pin. If it’s red/protruded, the system is currently bypassing filtered oil or is about to.

• O-Ring Integrity: Always ensure the interface O-ring is seated correctly during installation to prevent external leaks under high pressure.

• Terminal Wiring: Follow the $DIN$ plug wiring diagram strictly. Ensure the cable gland is tightened to maintain the $IP65$ sealing against moisture ingress.

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