Abstract: A pressure regulator for controlling the flow of gas from a high pressure source to a low pressure device includes a body having a high pressure inlet defining a seat. An adjusting collar has a centrally located bore. The collar engages the body at any predefined radial orientation. The collar has a thread and is securable to the body at the selected radial orientation. The regulator also has a threaded bonnet to engage the collar. A locking ring engages the body and secures the adjusting collar to the body. A piston has a central bore and is disposed within a piston chamber that defines a gap between the piston and a wall. The piston is movable between an open condition and a closed condition. A spring moves the piston to the open condition. A pin valve is disposed in the central longitudinal bore in the piston.

Abstract: A self-sealing protective/dust cover for application to a magnetically attractable filling port includes a sleeve defined by a closed wall and closed at one end by an end face. The closed wall defines an open central region and the end face is contiguous with the closed wall. A magnet provide magnetic attraction between the protective/dust cover and the filling port to maintain the protective/dust cover on the filling port.