As one of the leading socket weld forged steel gate valve,Website: , 800lb and 1500 lb forged gate valve, bolted bonnet 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 for socket weld forged steel gate valve, one type is bolted bonnet (BB), with male-female joint,spiral wound gasket,made in 304L/graphite, ring joint gasket are also available on request, another one is welded bonnet, with a threaded and seal welded joint, on request a full penetration strength welded joint is available, the third one is pressure seal tightening bonnet, the a threaded and pressure seal bonnet joint. Pls check the picture as bellow :      Bolted bonnet                                             welded bonnet                                          pressure seal bonnet ConstructionFull port or reduced port, outside screw and yoke (OS&Y)Two piece self-aligning packing gland.Integral backseatSocket weld ends confirm to ASME B16.11 Application standard 1, design & manufacturer confirm to : API 602; BS5352;ASME B16.342, socket weld end dimension according to ANSI B16.113, inspection and test confirm to API 5984, main material : A105;LF2;F5;F11;304(L);316(L);F347;F321;F51;Monel;20#alloy steel5, pressure : 800 class, 1500 class, 2500 class Dimension for 800 class (Bolted bonnet type ) (NPS)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