P/N: FS25-20-D2-6M

Andair FS2520 Duplex 1/2" Fuel Selector

The FS2520 is a 3-way 1/2" duplex fuel selector and allows for two lines to be switched simultaneously, this means that the return fuel from the engines fuel injector/manifold block can be returned to the same tank from which it was drawn. The valve has the positions LEFT - RIGHT - OFF.

When the valve is in the ON condition, there is an easy action between the LEFT and RIGHT position. Inside the valve is highly polished ball valves packed with precision PTFE seals. This not only provides smooth action but also gives a perfect seal.

To switch the valve to OFF the red safety button on top of the lever must be raised. This helps prevent the pilot inadvertently switching the fuel OFF. The FS2520 has a 1/2" feed section and a 3/8" return section. A variant of the FS2520 valve is used to supply engines such as Continental IO-550-N and is used in the acclaimed Cirrus SR22.

The lower section can only be used as the feed and the upper section as the return. Each section must be completely sealed from each other so there is no chance of any leakage from feed to return.

Fittings:

• Lower Inlet, LH/RH Tank: Male AN-8, JIC-8
• Lower Outlet to Engine: Male AN-8, JIC-8
• Upper Outlet to LH/RH Tank: Male AN-6, JIC-6
• Upper Inlet from Engine: Male AN-6, JIC-6

About Duplex Fuel Selector Valves:

Duplex fuel selectors have two separate compartments, allowing two independent fuel lines to be switched simultaneously. This makes them ideal for fuel-injected engines where a return line is needed. One significant benefit of these valves is that fuel can be returned to the same tank from which it was drawn thus preventing the need to dump fuel overboard. They can be supplied with either 1/4", 3/8" or 1/2" supply lines.

All Andair valves are designed for safety and incorporate several design features that allow a positive selection action. There is a large red lever with 'fuel' engraved on it and a clearly labelled fascia plate to indicate which tank has been selected. The lever also incorporates a safety detent mechanism. This feature acts in two ways. It allows for a good solid detent at each tank position, and the button on top of the lever must be raised to switch the fuel off. All these features help prevent the pilot switching the wrong tank or turning the fuel off.