First, the Usage J41H, J41Y, J41W GB shutoff valve opening and closing parts cylindrical valve flap, the seal appear before the plane or a cone, the valve flap along the centerline of the fluid for linear motion. GB shutoff valve is only applicable to fully open and fully closed, generally do not have to adjust the flow, custom-made from time to time to allow for adjustment and throttle. Features a simple structure, manufacture and maintenance more convenient working stroke, opening and closing short time, good sealing, the friction force between the sealing surface, longer life expectancy, three design specifications of the implementation of standards: GB / T 12235 length of the structure: GB / T 12221 Flange connection: JB / T 79 Test and Inspection: JB / T 9002 product identification: GB / T 12220 supplier specifications: JB / T 7928 four GB flange globe valve performance parameters Model J41H-16C ~ 160C J41Y-16C ~ 160C J41W-16P ~ 160P working pressure (MPa) 1.6 ~ 16.0 applicable temperature (° C) ≤ 425 ≤ 150 for medium water, steam, oil weak corrosive medium material Body, bonnet The Titanium carbon steel, chrome-nickel stainless steel stem chromium stainless chromium nickel titanium stainless steel welded sealing surface, iron-based alloy hardfacing the hard base alloy body material packing asbestos graphite, flexible graphite, PTFE five, GB flange globe valve shape and connection dimensions 2.5MPa DN of the LD D1 D2 b n-Φd H D0 10 130 90 60 40 16 4-Φ14 198 120 15 130 95 65 45 16 4-Φ14 218 120 20 150 105 75 55 16 4-Φ14 258 140 25 160 115 85 65 16 4-Φ14 275 140 32 180 135 100 78 18 4-Φ18 280 160 40 200 145 110 85 18 4-Φ18 330 180 50 230 160 125 100 20 4-Φ18 350 200 65 290 180 145 125 22 8 - Φ18 400 280 80 310 195 160 135 22 8-Φ18 355 280 100 350 230 190 160 24 8-Φ23 415 320 125 400 270 220 188 28 8-Φ25 460 360 150 480 300 250 218 30 8-Φ25 510 450 200 600 360 310 278 34 12-Φ25 710 500 250 622 425 370 332 36 12-Φ30 786 550 300 698 485 430 390 40 16-Φ30 925 600