Industrial VG-030-013 Pressure Drop Indicator Gauge

The VG-030-013 Pressure Drop Indicator Gauge is a compact inline visual device that signals when differential pressure across filters or flow restrictions exceeds a set threshold, indicating clogging or reduced system efficiency. It is used in industrial filtration and hydraulic/pneumatic systems to monitor pressure differential across filters, enabling operators to determine when filter elements require replacement or cleaning and helping prevent equipment damage from restricted flow; common installations include hydraulic power units, oil filtration systems, and air filtration assemblies. The gauge features an aluminum/brass housing with industrial sealing components and inline or filter-mounted ports (typically threaded fittings); it utilizes a visual mechanical indicator (spring/piston type typical) with a system-dependent, low differential pressure monitoring range and a mechanical dial or pop-up indicator depending on model. Common replacements include Donaldson differential pressure indicator gauge (filter monitoring series equivalent), Parker hydraulic filter pressure drop indicator, and HYDAC visual clogging indicator / differential pressure switch assembly.