Some important information that may be of use to purchasers.
When my bottles arrived I read the instructions and saw that the instruction is, with a 7.5kg bottle to only fill it with 10 litres of gas from the nominal 14.5kg AT THE FIRST FILL.
I emailed Safefill and asked
1) why is this
2) What happens if you dont follow this instruction
3) At what level and when can you fill to 14.5L or 80%.
There is little to no information about this after the instruction. I have received a reply very quickly (kudos to them) with the following information:
Hello Ian,
Let me explain,
All opd and pumping equipment work on the principles of pressure differential The cylinders arrive to us pressurised, even though we de-gas them before they are distributed to our dealers NB Residual pressure in the cylinder can occasionally effect the opd when filling for the first time.
I personally wait till its almost empty before I fill so I know what the max fill level will be. But it's up to you, as you mentioned if your 7.5kg is half empty it should take approximately 7 litres to reach its max fill level. If it goes above this then stop the pump. As the filler you always need to be mindful when filling. A good tip to check before refilling is take the cylinder to a darkend area and shine an led light from one side and look from the other side and you can see the level. As I mentioned earlier Opd work on the principles of pressure differential, once the opd reaches its max, the pump should sence this differential increase and stop the pump, we have no way of checking the filling equipment so it's up to the filler to always be mindful every time you fill.
Regards
Neil
Hope this is of some use to prospects.