Parker Bestobell’s Truflo is a highly effective electronic low flow protection switch. It protects equipment against flow changes that could be detrimental to its operation, sending an electronic alert in cases of insufficient flow, as standard, or excessive flow, on request. It alerts the operators in the event of a change in differential pressure, allowing them to respond accordingly.
Truflo operates by movement of a diaphragm that operates a micro-switch. The underside of the diaphragm is in direct contact with the inlet flow, whilst the upper side is in contact with the outlet flow from the calibrated nozzle. With no flow through, a spring loaded plunger holds the diaphragm in the down position. Flow through the calibrated nozzle causes a pressure differential between top and bottom of the diaphragm, with the higher pressure on the underside of the diaphragm pushing it upwards. This in turn causes the plunger to move, which activates the micro-switch.

Markets:
• Defence

Features / Benefits:
• Warns against insufficient flow as standard or can warn against excessive flow on request.
• Lifts to tight tolerances (2 PSI pressure rating)
• Life Expectancy - 500,000 operations @ 15amps / 6,000,000 operations @ 5amps
• Main Diaphragm – rubber coated - Silicone available on request
• Enhanced controllability
• Reliable flow control
• Provides reliable advanced warning system for operator
• Operator can respond and adjust pressure, where necessary, protecting assets

Applications:
• Managing cooling systems for on-board electronics on warships and auxiliary support vessels
• Noise suppression in submarines - this technology is used to reduce the noise profiles of many submarines, through management of on-board auxiliary systems for cooling electronics and sanitary systems
• Radar systems - many land and marine based radar systems require in built cooling control systems
• Weapons control systems

Low Flow Protection Switch - Truflo