Automatic Valve Manufacturer, Pneumatic Ball Valve, Pneumatic Flanged Ball Valve Valve Model Preparation instructions 1 、 Feature Code: The characteristic code of ou「 company is . 2、 Special Demand Code: K=Anti-sulphur Type, D=Low-temperature Type, B=Heat-insulating Jacketed Type, L=Lengthened Stem Type, Y = Special Type fo「 Oxygen, W=Sanitary Type、 V= VType Ball 3 、 Valve Type code: Z= Gate Valve, J=Stop Valve、 O= Ball Valve、 D = Butterfly Valve、 G = Diaphragm Valve、 X = Cock Valve 4, Codes for Pneumatic Manne『s: 6 = Pneumatic, 6S = Pneumatic-Manual, 6K = Pneumatic-Normal Open, 68 = Pneumatic-Normal Close 5、 Connecting Manner Code: 1 = Inside Thread Connection, 2 = Outside Thread Connection, 4 = Flanged Connection, 6=Weldi吨, 7= Wafer Connection, 8 = Buckle Connection 6、 Structure Form Code: Gate Valve 1 = Wedge Single Flashboard, 2 = Wedge Double Flash board, O = Wedge Elastic Flashboard, 3 = Paralleled Single Flash board, 4 = Paralleled Double Flash board Stop Valve 1 = Floating Straight-through Type, 4 = Angle Type, 5 = Straight-flow Ball Valve 1 = Floating Straight-through Type, 4 = Floating Type L-shaped Three-way, 5 = Floating Type T -shaped Three-way, 7 = Fixed Typed Straight-through Type, 8 = Fixed Typed L-shaped Three-way, 9 = Fixed Type L-shaped Three-way, O = Hemisphere through Butterfly valve 1 = Center-line Straight-plate Typed, 3 = 3-D Eccentric Type Diaphragm valve 1 = Ridge Typed, 3 = Stop Valve Cock Valve 3 = Staight-through Type, 4= T-shaped Three-way Type, 5 = Four-way Type 7, Codes for Sealing Surface Material or Lining Material: F = Polytetrafluoroethylene, P = Para-Position polyphenylene, N = Nylon, X = Rubber, H =Alloy Steel, Y = Hard Allo