... and abrasive resistance. 4,Aviation rubber for seals ring of orifice plate, made through integrated pressuring, good corrosion ... resistance and aging resistance. 5,Has the features of valve type orifice throttle device. 6,Can replace and maintain ... the sulphur content of various medium, can be divided into non-sulphur resistant type, sulphur resistant type. Advanced Type Orifice Plate Pressure ...