Product structural features GB bellows valve for nominal pressure PN1.6 ~ 16MPa, the pipeline operating temperature of the oil, chemical, pharmaceutical, fertilizer, power industry -29 ~ 350 ℃ of other working conditions, or turn off the pipeline media. The main structural features of a product and reasonable structure, reliable sealing, excellent performance and attractive appearance; 2, the sealing surface Co-based alloy, wear and corrosion resistance, good anti-friction properties, long life; 3, stem quenching and surface nitriding treatment, good corrosion and anti-friction properties; 4, double-sealed, more reliable performance; 5, stem down position indicator, more intuitive; 6, parts materials and flanges, butt weld end dimension According to the actual working conditions or reasonable matching user requirements, to meet the various needs of engineering. Technical structure specification BB-BG-OS & Y Drive Manual electric design standards GB12234 GB12221 length of the structure connecting flange GB9113, JB79, HG20596 testing and inspection JB / T 9092, GB / T13927 product performance specifications Nominal (MPa) housing Test pressure (MPa) Sealing test pressure (MPa) Temperature (℃) using media 1.6 2.4 1.76 ≤350 ℃ water, steam, oil and other 2.5 4.0 6.0 4.4 6.4 3.75 2.75 7.04 9.6 Materials of Main Parts No. Name Material 1 Body WCB WC1, WC6, WC9, C5 CF8, CF8M, CF3, CF3M 2 valve plate 25,1Cr13,2Cr13 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti 20Cr1Mo1V, 25Cr2MoV 3 stem 25,1Cr13,2Cr13 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti 20Cr1Mo1V, 25Cr2MoV 4 bellows assembly 1Cr18Ni9Ti, 304 , 316,304L, 316L 5 bracket WCB, WC1, WC6, WC9, C5 CF8, CF8M, CF3, CF3M, 6 flexible graphite gasket and stainless steel Flexible graphite + stainless steel, PTFE 7 bonnet WCB WC1, WC6, WC9, C5 CF8, CF8M, CF3, CF3M 8 hex nut 0Cr18Ni9Ti, 0Cr18Ni12Mo2Ti 35CrMoV, 25Cr2MoV 9 stud 0Cr18Ni9Ti, 0Cr18Ni12Mo2Ti 35CrMoV, 25Cr2MoV 10 11 flexible graphite packing gland WCB WC1, WC6, WC9, C5 CF8, CF8M, CF3, CF3M 12 Copper alloy stem nut 13 handwheel WCB QT400-18 model WZ41-16 pressure rating PN16 caliber 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 L 108 117 127 140 165 178 190 203 229 254 267 292 330 356 381 H 200 210 250 260 290 370 398 440 490 530 580 670 760 850 950 W 120 140 140 180 200 220 260 280 300 340 400 450 450 500 500 Weight (kg) 8 9 10 15 22 30 43 57 73 105 150 190 270 380,480 models WZ41-25 pressure rating PN25 caliber 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 L 140 152 165 178 190 216 241 283 305 381 403 419 457 502 762 H 200 210 250 260 290 370 398 440 490 530 580 670 760 850 980 W 120 140 140 180 200 220 260 280 300 340 400 450 450 500 500 Weight (kg) 9 10 12 17 23 34 50 65 82 115 165 210 300 420 540 Pressure rating PN40 caliber model WZ41-40 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 L 165 190 216 229 241 292 330 356 432 508 559 660 787 838 889 H 200 210 250 260 290 370 398 440 490 530 580 670 760 850 980 W 120 140 140 180 200,220,260,280,300 340,400,450,450,500 500 parts by weight (kg) 9 10 12 18 25 38 53 70 88 125 175 225 310 440 560