Wilden Products

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Not only are Wilden pumps the most cost-effective, reliable and energy-efficient solutions available, but our state-of-the-art air distribution systems (ADS) significantly increase positive displacement pump productivity by reducing air consumption and maintenance for the most energy-efficient AODD pump operation possible.

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Wilden® solves pumping challenges across the spectrum

Wilden® positive displacement air-operated double-diaphragm (AODD) pump solutions are leading the way in a host of industries and applications.

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Wilden® is always ready to assist with technical support for Wilden AODD pumps, parts or accessories.

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Wil-Gard III Diaphragm Monitoring System

Wil-Gard™ III Diaphragm Monitoring System

The Wilden® Wil-Gard™ III Diaphragm Monitoring System for air-operated double-diaphragm (AODD) pumps detects diaphragm failure at the source, the primary diaphragm, not at the air chamber or the air exhaust as other systems do. This is accomplished by utilizing sensors located between PTFE primary diaphragms and back-up (containment) diaphragms within each side of the Wilden pump. When the sensors detect conductive fluid, an audible alarm, high-brightness LED and an internal latching relay are activated while the back-up diaphragms offer containment. The relay gives you the ability to activate external components such as isolation valves or air shut-off valves. The systems leads to an increase in containment, a reduction in fugitive emissions, and a reduction in down time and maintenance costs with 24-hour pump surveillance.

The Wil-Gard III can be purchased as a factory installed option in the Wilden pump or as an accessory that can be installed in existing pumps.

Features and Benefits

  • 24-hour pump surveillance
  • Detects conductive liquids
  • Offers protection from product contamination (i.e. relay contact closure activates isolation valves upon alarm initiation)
  • Detects leak while back-up diaphragm offers containment
  • Reduces chemical attach on non-wetted pump parts


Product Specifications
Power Requirement 100-250V AC, 50/60 Hz
Internal Latching Relay Max. 2 Amps @ 250 Volts
Conductivity Sensitivity 75 Micro-Siemens



Model: Wil-Gard III | Code: WIL-19050-E-02