Hand wheel regulator

Hi so I just purchased a safefill bottle and want to swap the regulator to a hand wheel type I ordered one from my local dealer that's like this. [You must be registered and logged in to see this link.]
And the connector is not the same is it ok to remove the end connector and use a jubilee clip to connect to the van like the original ? The van has 8 mm orange pipe and this one looks thicker.

That isnt a regulator, its a connection hose from the cylinder to a bulk head type regulator.
I presume from your description you mean an adjustable regulator with a pa screw.  You should stick with a normal fixed pressure type.