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Xtraflo Valve

Xtraflo Valve Operating Principle


NEW! Apex XtraFlo® Water Tank Valve


Xtraflo Trough Valve Operating Principle
The Xtraflo valve is a diaphragm operated valve, it uses the line pressure to open and close the main valve diaphragm. The standard valve has a minimum operating pressure of 55 kPa (8psi) and the low-pressure valve has a minimum operating pressure of 30 kPa (4psi).

Closed position
The water pressure in the inlet of the valve is allowed to pass up the side of the stainless spindle into the cavity in the cap.

This pressurises the area behind the diaphragm to the same pressure as the inlet of the valve.

Since the area behind the diaphragm is much greater than the inlet of the valve, the diaphragm is held against the valve seat and the valve remains closed.

Open position
As the water lever falls, the lever is allowed to drop.

This pulls the stainless spindle away from the valve inlet.

The pressure behind the diaphragm is vented through the cap.

The pathway from the inlet of the valve to the space behind the diaphragm is also closed off.

The pressure of the water in the inlet is now able to push the diaphragm off the seat, opening the valve.