As one of the leading screwed end forged steel gate valve,Website: , threaded forged steel gate valve, female forged steel gate valve manufacturers and suppliers in China and equipped with a productive factory, Shanghai Hugo Valve Co.,Ltd is always at your service. Description There are three types bonnet design also for screwed forged steel gate valve, they are bolted bonnet, welded bonnet and pressure seal bonnet, but the bolted bonnet type be used usually. The structure are as bellow picture: ConstructionFP or RP (Full port or reduced port), outside screw and yoke (OS&Y)Two piece self-aligning packing gland.Integral backseatScrewed end confirm to ASME B1.20.1 Application standard 1, design & manufacturer according to : API 602; BS5352;ASME B16.342, Threaded end dimension confirm to ANSI B1.20.13, Inspection and test confirm to API 5984, main material : A105;LF2;F5;F11;304(L);316(L);F347;F321;F51;Monel;20#alloy steel etc which confirm to ANSI/ASTM.5, pressure grade : 800 class, 1500 class, 2500 class Dimension for 800 class (Bolted bonnet type )                                                         Threaded ends design confirm to API 602 Specification R.P - 1/2'' 3/4'' 1'' 1 1/4'' 1 1/2'' 2'' 2 1/2'' F.P 1/4'' 3/8'' 1/2'' 3/4'' 1'' 1 1/4'' 1 1/2'' 2'' Face to face L 79 79 92 111 120 120 140 178 Hand wheel diameter w 100 100 100 125 160 160 180 200 Height H 161 161 163 196 223 251 290 333 Flow port dimension d 8 10.5 13.5 18 24 29 36.5 45 Weight(kg) 2.3 2.22 2.39 4.24 5.7 7.05 10.9 16.8