tructure are as bellow picture:ConstructionReduced port (RP), outside screw and yoke (OS 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 classDimension for 800 class (Bolted bonnet type )SizeF.P1/4''3/8''1/2''3/4''1''1 1/4''1 1/2''2''Face to faceL797992111120152172200Hand whee