Flow Regulator Valve

You only have to make a 2 ways flow regulator by measuring the pressure drop at an orifice and modifying the needle position so that this pressure drop stays constant. In hydraulics such devices are available but not for so small flows so that you need either a new design or use a electronic pilot.

Another method: Use a simple float valve (like a toilet tank valve) to feed the oil from the 5-gal tank into a smaller secondary tank, thereby maintaining a constant level the 2nd tank. From there, you have constant conditions to gravity feed to the boiler as before.

I want to thank you both for your help.Not sure what a electronic polit is,as is may be over my head. For adding another tank to maintain a fuel level would work well, but trying to keep it simple as the oil needs to be heated some do to a cold basement. Had a friend that suggested using a pressure tank installed below the level of the furnace head. Assumingly it should only take a couple pounds of pressure. There is already compressed air involved to atomize the oil in the furnace. All that is needed is a storage (10 gallon) tank that can take low pressure and a air regulator. So that's the next step I am going to try. But thank you again for the input. Have a nice day.

good luck getting a needle valve to work right to give you a constant flow from wvo on a babbington. go here for some info http://biodiesel.infopop.cc/6/ubb.x?a=cfrm&s=447609751 The problem is as the temp changes, the viscosity(thickness) changes. With different types of wvo at the same temp there is differences,as well. I beleive most of the babbington crowd has moved to a small gear pump, like an old chevy oil pump for motor oil, and they are running them with a windsheild wiper motor. Run off 12 volts, the motor can be run faster or slower from a speed control or simple nicrome wire voltage regulator. Check yahoo groups alternatefuelfurnace as well. Some of the other yahoo discussion groups discuss babbs as well. There is a LOT of info and interest on babbingtons, as well as laser drilled .0010 balls available now.

There is also some luck with siphon setups. If the oil temp is constant, a siphon will give a more even flow rate than a needle valve will. You can still use the needle valve, just use it on the downside of the siphon line. On gravity, as the storage tank has less oil, it is being pushed out slower. On a siphon, the flow is about constant untill you reach the bottom of your tank.