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jimk(at)hdiss.net
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 Posted: Thu Dec 15, 2011 8:29 am Post subject: Re Auto Aux Fuel Pump Circuit Idea |
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The original topic seems to have gravitated to the area of vapor locks and pump placement. That is fine with me and actually makes my below information applicable.
Here is my question to Don Rivera of Airflow Performance (the maker of my Aux pump & kit) and his answer:
My question was: " I have return lines to each wing tank. These lines go through an Andair Value that when turned, changes both the out going line from the tank as well as the return line. So, can I hook up your boost pump to take advantage of the plumbing I have in place or should I abandon it and the expensive Andair Valve?"
Don's response, Nov 19, 2011:
"It would not be advisable to run separate return lines to each tank when using this boost pump package. Simply tee the return line into the supply line feeding the boost pump. You can put a tee fitting on the outlet of the selector valve then on the run of the tee, connect that to the inlet of the boost pump. Connect the return line from the pump to the tee part of the fitting on the selector valve. You can use your trick Andair selector valve for the purge return (that’s the valve on top of the engine).
Due to vapor issues it is not advisable to install the boost pump on the engine side of the firewall (a gascolator is also not advisable to be installed on the firewall). This is far more a flight safety issue than installing the boost pump with “high pressure fuel” (30 PSI is not high pressure) in the cockpit. If the plumbing is installed correctly and aircraft fuel system practices are followed for plumbing (reference AC4313-2B) there should be no problem."
Don Rivera
Airflow Performance
111 Airflow Drive
Spartanburg, SC 29306
Phone: 864-576-4512
Fax: 864-576-0201
E-Mail: don(at)airflowperformance.com (don(at)airflowperformance.com)
website: airflowperformance.com
Jim Kinninger
jimk(at)hdiss.net (jimk(at)hdiss.net)
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