... and aging resistance.5,Have the features of valve type orifice throttle device, but gas must be stopped for replacing ... the orifice plate.6,Vertical installation and horizontal installation are all available.7,Simple structure and low ... medium, can be divided into non-sulphur resistant type, sulphur resistant type.9,Product range:PN1.6~32MPaDN50 ~700mm Simple Type Orifice Meter Fitting