Lined fluorine diaphragm valve is a special form of cut-off valve, appeared in the 1920s. Its opening and closing pieces is a piece of diaphragm made of soft material, the valve cavity and the valve cavity and drive components separated, it said the diaphragm valve.
Lined fluorine 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.
Lined fluorine diaphragm valve 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 | |||
Lined fluorine diaphragm valve 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 |
