Hi Mike Yes we do the same with lock offs and vaporisers, it costs too much in time to fit the kits. Some things I would like to know: Why has the button been removed on Cobra? It also used to have a plastic cover, what are the rules if it gets lost?
We see on some vapourisers, Schreider valves on the primary and secondary chambers, do Impco supply a pressure gauge to suit this type of valve? Do you know where I can get an explanation or cut away drawings that refer to Cobra and not the old K and J's. From what I can see the only internal change is to the Primary chamber valve. It used to be a flat spring with a rubber face valve. Now the valve has a "stem" with a rubber seat on the end. My drawings show the K's spring seat. I just think Impco must have updated the information somewhere. Then I coulld give up to date information to my technicians.
Even the lock off's show the "O" ring seal on the valve stem, yet it has had a "U" ring seal for years!