Diaphragm Guardian System

The Air Operated Diaphragm Guardian System monitors fluid pressure, changing its output if the monitored pressure rises above or falls below the set point of the Guardian (dependant on configuration), controlling the associated pump according to the following applications:

Dry run & stop

If the discharge pressure inside the pump falls below the configured point, the pump stops. This is caused by air being absorbed into the pump.

Dead head & stop

If the discharge pressure inside the pump rises to the configured point, the pump stops. This is caused by a closed valve or an exceeding amount of pressure inside the discharge line.

Dead head & restart

If the discharge pressure inside the pump rises to the configured point, the pump stops. This is caused by a closed valve or an exceeding amount of pressure inside the discharge line. The pump automatically restarts when the pressure falls back below the set configured point.

Dry Run & Dead Head

The Electronic Dry Run and Dead Head Protection System controls pumps shutting down with extremely high accuracy of up to 0.05 Bar. This means that this is an impressively reliable and effective system, with the added benefit of lower operating costs and lower compressed air consumption.

Barrier Pump & Control

The Barrier Pump has a second diaphragm which acts as a back up within the pump. The Guardian monitors the pressure between the first and second diaphragms. We recommend purchasing this in conjunction with a diaphragm alarm system which would sound an alarm and shut down the pump if the pressure was to rise above the configured point. This would protect the environment or the pump from liquid entering the air system.