Fluorine Lined Diaphragm Valve

Fluorine Lined Diaphragm Valve

Product model: J41F4
Nominal diameter: DN15~300mm
Nominal pressure: PN0.6~1.6MPa
Main material: HT250, WCB, CF8, CF8M, CF3, CF3M
Design and manufacture: GB12239
Structure length: GB1221/JB1688
Flange size: JB78/JB79(GBHGSH)
Pressure test: GB/T13927
Tags: GB12220
Supply: GB/T12252

Product overview

J41F4 Fluorine Lined Diaphragm Valve produced and sold by Baigang Valve Group is a special form of cut-off valve, which appeared in the 1920s.Its opening and closing part is a piece of diaphragm made of soft material, the valve body cavity and the valve cover cavity and drive parts are separated, so called diaphragm valve.


Product principle

Diaphragm valve is in the valve body and the valve cover with a flexible diaphragm or a combination of the diaphragm, the closing member is connected with the diaphragm of a compression device, the structure of the valve with a very different form, is a special form of the cut-off valve , Its opening and closing parts by the steel flap and soft material (rubber and fluorine plastic compound) made of diaphragm, and the body cavity separated to achieve the purpose of cutting off the media inside the tube.


Main components of the material table

Serial number Part Name grey cast iron Cast steel Stainless steel acid-proof Ultra-low carbon stainless steel acid-proof
Z C P R PL RL
1 Body / bonnet HT250 WCB CF8 CF8M CF3 CF3M
2 Disc / stem 25 2Cr13 1Cr18Ni9 1Cr18Ni12Mo2Ti 00Cr18Ni10 00Cr17Ni14Mo2
3 Lining / seat PCTEF (F3), FEP (F46), PFA (Soluble F4), PP, PO
4 Diaphragm FEP (F46) / CR (neoprene) PFA (soluble F4) / FPDM (ethylene propylene rubber)
5 Bracket PTFE (F4) CF8 CF8
6 Stem nut ZCuAl10Fe3 ZCuAl10Fe3 ZCuAl10Fe3
7 Tighten the bolts 35 1Cr17Ni2 1Cr18Ni9Ti
8 Nut 45 0Cr18Ni9 0Cr18Ni9
9 Handwheel WCB WCB WCB


Main dimensions and connection dimensions

Nominal diameter L D D1 D2 f b Z-φd D D1 D2 f b Z-φd
DN (mm) NPS (inch) PN1.0MPa PN1.6MPa
15 1/2 125 80 55 40 2 12 4-φ12 95 65 45 2 14 4-φ14
20 3/4 135 90 65 50 2 14 4-φ12 105 75 55 2 16 4-φ14
25 1 145 100 75 60 2 14 4-φ12 115 85 65 2 16 4-φ14
32 5/4 160 120 90 70 2 16 4-φ14 135 100 78 2 18 4-φ18
40 3/2 180 130 100 80 3 16 4-φ14 145 110 85 3 18 4-φ18
50 2 210 140 110 90 3 16 4-φ14 160 125 100 3 20 4-φ18
65 5/2 250 160 130 110 3 16 4-φ14 180 145 120 3 20 4-φ18
80 3 300 185 150 125 3 18 4-φ18 195 160 135 3 22 4-φ18
100 4 350 205 170 145 3 18 4-φ18 215 180 155 3 22 8-φ18
125 5 400 235 200 175 3 20 8-φ18 245 210 185 3 24 8-φ18
150 6 460 260 225 200 3 20 8-φ18 280 240 210 3 24 8-φ23
200 8 570 315 280 255 3 22 8-φ18 335 295 265 3 26 8-φ23
250 10 680 370 335 310 3 24 12-φ28 390 350 320 3 28 12-φ23
300 12 790 435 395 362 4 24 12-φ23 440 400 368 4 28 12-φ23