|Looks good but hides a flaw|
|Mounted on top of the WS BFP's Steam chest|
|Main pot removed to show the internal tube|
Being heavier than oil, the water sinks to the bottom and raises the level of the oil. The oil then spills over into the internal tube and back down into the steam chest below. So this is how the steam oil gets into the steam chest at the same pressure as the steam.
How does the oil get into the main pot? Well, you take off the filler cap and pour it in or so you expect until you actually have a look inside.
|The top of the tube is open!|
I've concluded that there must be a missing part which blocks the hole but still allows the oil to spill over into the tube as intended.
I spent a lot of time figuring out how this part could block yet not block the tube top. Eventually I came up with a sort of castellated pointy hat thing!
|Castellated, pointy, hat thing drilled from below to meet six holes and...|
|...which can sit on top of the tube like this|
|Pointy hat top|
I wonder if it will still work and what was there originally?