So you're build your own waste oil heater, and having a lot of trouble keeping it to a steady temperature. It wants to go up & down in temperature without you even touching anything and sometimes turns into a chernobyl nuclear reactor.
Why does this happen? Well as oil warms up, it flows easier & faster, your heater heat output increases 10 fold.
There are a few rules regarding burning oil.
#1 If the heater is inside, keep the oil outside, and via versa, this well stop the oil from heating up, therefore making the oil more stable.
#2 Needle valves sort of work, but wheel valves don't. No tap we have tried really works, all taps will flow faster when the oil temperature increases.
To be totally honest about this, we have been through those horrible times when the heater turns red hot, and nothing you do, will slow it down, apart from turning the oil flow off and closing all air inlets. Even needle valves supply more oil when the oil warms, so it has to be pumped to control the flow.
So with our engineer's help we have designed, and built, a controlled waste oil feed, which is a timer/pump system which controls the oil flow, whether the oil gets hot or cold it never changes, giving a set measured amount (about 1 teaspoon) of oil, every few seconds. By doing this, it controls the temperature, and never goes above 3-4 degrees on what you set it at. Customers find they can leave their heaters on all day, all night, with this controller and it never alters.
We use one on our heater, and it really does control it, and removes the worry out of waste oil heating. I would never run a waste oil heater without it now. You know it will never oversupply oil, and it will never overheat, and the temperature always stay the same..
So now electrics are introduced, we are now turning the oil feed and fan on & off via wifi on our smartphone. Which now is available to all.
Auto lighting arriving 2018.Will keep everyone informed.
The complete controller wired up, with tubing and power supply, timer and pump.
Comes preset 9 second delay 1 second it pumps oil into the heater.