Apache pigPRO - Model Series 57 - Visual Flag Indicator - Brochure

The Base Model 57 is a visual flag indicator with manual reset. It is a popular member of Apache’s pigPRO™ Series, a patented line of intrusive pig passage indicators that reliably detect the precise location of a cleaning pig as it travels within the pipeline network. When a cleaning pig passes the system’s intruding plunger, it activates the plunger and triggers a visual flag indicator, signaling the pig’s location.