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This is a parts list and description of my KH dewatering and filter set up which includes a bypass to keep the filters within there pressure rating

complete set up

Main parts used

3mts 22mm pipe 2x 3/4 hosetails 3mt clear 1" pipe 3x tees 9x 90s 1x 45 bypass valve 5x tank connectors 5x nylon washers 3x joiners 4x 3/4"-22mm 6x full bore valves 2x pressure gauges 18" immersion heater 3x 10" filters plus brackets/elements mechanical flange 400mic drum filter 205lt clip top drum 120lt HDPE clip top drum tam 105 pump 2x 1"-22mm 4 mt flex 2 plugs 22-15-22 tee 1x 15mm ball valve

Total cost @ 01/05/11 £325

What it does

The wvo goes into the drum via a 400 micron drum filter,its then heated with the option of circulating to speed dewatering,it is then pumped into the storage drum via 20 and 5 micron filters,most filters are rated at 0.8 bar so there is a bypass valve which ensures the oil is never forced through the filters,from the storage drum the oil goes through a 1 micron filter to the car/drums

Valve,gauges and filters

pump and 1 mic filter

400 micron drum filter

Safety features

There is a float switch which cuts out the pump at low oil levels and if either filter blocks the bypass valve will send the oil back into the main drum where it will just circulate in a loop

Float switch

Valve and added ball valve

What i was trying to achieve

My aim was to make a self contained filter unit to which you can add extra storage drums as needed but to also be affordable

Main tank

Main tank