Subframe for a valve body

A cylinder valve assembly having an outer casing and a sub-frame for a valve body having two or more location surfaces, said outer casing comprising a first portion and a second portion, said sub-frame comprising a first and a second portion having mutually confronting contact surfaces, sides and front and back surfaces and mutually confronting engagement surfaces wherein said mutually confronting contact surfaces are shaped to engage with each other upon placement together of the first and second portions of the sub-frame and said mutually confronting engagement surfaces are shaped to engage with one or other of said one or more location surfaces on the valve body when positioned therearound, the first portion of the outer casing having one or more lower first location features and one or more upper first location features thereon, and the second portion of the outer casing having one or more lower first location features and one or more upper first location features thereon,

• wherein said sub-frame further includes one or more lower second location features and one or more upper second location features for engagement with said one or more first location features of the first portion of the outer casing when said first and second portions of the outer casing are placed around said sub-frame;
• and
• the lower first location features of the first portion and the lower first location features of the second portion include lower surfaces facing downwardly and side surfaces facing upwardly;
• and
• the upper first location features of the first portion and the upper first location features of the second portion include upper surfaces facing upwardly and outer surfaces facing outwardly, and between the upper surfaces and the outer surfaces defines a generally rectangular shaped guide onto which the first and second portions of the outer casing slide onto when being positioned relative thereto.