... resistance and aging resistance.5,Have the features of valve type orifice throttle device, but gas must be stopped for ... 6,Vertical installation and horizontal installation are all available.7,Simple structure and low price.8,According to the sulphur ... , can be divided into non-sulphur resistant type, sulphur resistant type.9,Product range:PN1.6~32MPaDN50 ~700mm Simple Type Orifice Meter Fitting