Electric fuel pump

Tomas J · #1 03-10-2014, 02:38 AM

Hi,
Are there anyone having an idea of how big particles that can come through an FACET SOLID STATE ELECTRIC FUEL PUMPS or anyone having a exploded picture of the pump. I would like to learn a bit more about the pump.

rhill · #2 03-10-2014, 04:05 AM

Hi Tomas,
They are a plunger type. A 8 pin IC is an oscillator (555 timer) this pulses a power transistor, that pulses a coil. The coil pulls a plunger up,and after the power is removed a spring pulls it back. These pumps will not handle any dirt. I took one apart and found the electronic part was fine. A small particle of dirt had wedged between the plunger and coil bore. The pump worked after I removed the dirt,but I had to unfold all the crimped metal. Once the plunger is stuck youre done. If you could filter the inlet without restricting the flow that would help. Best to carry a spare. A motor driven pump would handle a small amount of dirt better. Vans has used them for years as a back up to the engine driven pump,I know of one local plane that went down due to blockage in one,well over 900 hours at the time.My plan is to use a motor driven pump,I have high hopes Andair would come up with something.Andy sees Carbs as horse and buggy and has concentrated there efforts on the FI pump&controller,mabe we can push him to offer one.
RHill

Walt · #3 03-10-2014, 05:58 AM

Facet recommends a 74 micron filter on the pump inlet for a good reason. I have no idea why Van's did not specify one in the plans but they should have.

Tomas J · #4 03-10-2014, 10:19 AM

Thanks RHill,
Is there no filter of any kind in this pump, like it is in the GOLD-FLO INTERRUPTER pump. Do you know how that pump works, and would you say it's more safe? I feel I like to filter the fuel before the pump, and thinking of what is best... put a separate filter before the pump I have, or change to a GOLD-FLO pump.
Anyone else having ideas about this?

rhill · #5 03-10-2014, 10:50 AM

Quote:

Originally Posted by Tomas J

Thanks RHill,
Is there no filter of any kind in this pump, like it is in the GOLD-FLO INTERRUPTER pump. Do you know how that pump works, and would you say it's more safe? I feel I like to filter the fuel before the pump, and thinking of what is best... put a separate filter before the pump I have, or change to a GOLD-FLO pump.
Anyone else having ideas about this?

Solenoid pumps are perhaps the most widely used "universal" type pumps and both the facet round pumps and the cube pumps are solenoid. They do not have centrifugal impellers or vanes. They are designed to fit lots of universal applications,I doubt experimental kit planes were what they had in mind.Rather than a motor, a solenoid pump uses a piston that is actuated by an electromagnetic coil. This is what's used to generate fuel pressure and flow. By utilizing short pulses of electricity the solenoid pump can be highly energy-efficient.Keep in mind what Walt has said they need filters,I've always installed them on the output side.As stated in the specs there is a screen filter on the Gold-Flo,I'm not sure of its placement.I defer to Walt on the best way to install and maintain the Fuel system on an RV. When it comes to RV maintenance, When Walt speaks,RV's listen!

RHill

Tomas J · #6 03-10-2014, 02:42 PM

Walt,
What filter will you recommend to use in front of the Facet pump?
http://www.aircraftspruce.com/catalo...?clickkey=4377
But that one don't seems to have the right fittings. What about this one...
http://www.aircraftspruce.com/catalo...clickkey=38120
Or would you say it's better to use GOLD-FLO pump with the internal filter?

Walt · #7 03-10-2014, 04:40 PM

Quote:

Originally Posted by Tomas J

Walt,
What filter will you recommend to use in front of the Facet pump?
http://www.aircraftspruce.com/catalo...?clickkey=4377
But that one don't seems to have the right fittings. What about this one...
http://www.aircraftspruce.com/catalo...clickkey=38120
Or would you say it's better to use GOLD-FLO pump with the internal filter?

Both of those are junk IMO, I use a FlowEzy series 3000 or use something similar (AFP also sells a good one).
http://flowezyfilters.freestarter.com/

rhill · #8 03-10-2014, 06:28 PM

Quote:

Originally Posted by Walt

Both of those are junk IMO, I use a FlowEzy series 3000 or use something similar (AFP also sells a good one).
http://flowezyfilters.freestarter.com/

Thank you Walt, Do you place this filter on the inlet side or output side? What fuel pump do you recommend for low pressure carb set ups? I know you have cautioned us all on checking our tubing flares for cracks with 10x magnification.Are there any other tips that you apply here?
RHill

PCHunt · #9 03-10-2014, 07:10 PM

Quote:

Originally Posted by Walt

Both of those are junk IMO, I use a FlowEzy series 3000 or use something similar (AFP also sells a good one).
http://flowezyfilters.freestarter.com/

Hi Walt: I noticed that the 3000 filter is rated for only 4 GPM. Sounds too low?

Walt · #10 03-10-2014, 07:19 PM

The facet pumps are fine in my experience, put the filter upstream of the pump to protect it. I have my filter right after the fuel selector valve.

Paper filters are prohibited, use only stainless steel mesh filters, anything finer than 74 micron is not necessary (I believe the AFP is 100) and should be avoided.

No rubber hoses with hose clamps and ditch the gascolator.

Other than that follow the plans.

Just my 2c.