electric fuel pump for Rotax 912 ULSFR

[rapidshot]

can anyone recommend me a backup electric fuel pump, there are a variety of pumps on Spruce's webpage but it is really difficult for me to choose one,

i am concerned if these backup pumps let the fuel flow while it is off, i am bit confused, some say i need a pressure regulator and/or check valve as well,

thank you

[ChrisVJ]

You need a fuel pump that gives no more than 4 psi pressure, then you don't need a gauge or relief valve.

Try and position the aux pump so that it gravity feeds from the tank, eliminates the risk of vapour lock.

Bought my Facet from A Spruce and it feeds through when off.

[rapidshot]

unfortunately i have a low wing aircraft and there is no way to have it installed for gravity feed, can you tell me what the number of the Facet was ,

thank you very much for the response

[patowalker]

Evektor fits a Pierburg pump with a check valve, as per page 123 here:
http://www.evektoraircraft.com/files/1303117514-ipc-sportstar-2011-comp.pdf

In the UK many 912 ULS powered low "wet" wings homebuilts are fitted with the
40106 FACET SOLID STATE FUEL PUMP or the 60106 FACET POSI-FLOW LIGHTWEIGHT SOLID STATE FUEL PUMP, without a check valve. Vapour return lines are mandatory.

These are the fuel pumps offered by the UK Rotax dealer. Until very recently they were also the local Evektor importers SKYDRIVE :: Products (http://www.skydrive.co.uk/products.asp?cat=42)

[rapidshot]

Thanks a lot Patowalker