

- The diaphragm of using FEP/FPA/PTFE and rubber composite, suitable for variety of corrosive media.
- 100% gas seal can be achieved to ensure no leakage in outlet port.
- No direct contact between metal parts and medium slurry.
- Bi-directional and full flowing path can reduce pressure drop, weaken abrasion and prolong the service working life.


| Lining material | Service temperature,°C | Application medium |
| NR | -10°C~+85°C | exclusive of strong oxidants:hydrochloric acid, fluorosilicic acid, phenolic acid, 30 percent sulfuric acid, 80 percent phosphoric acid, alkali, salt, gold plating solution, sodium hydroxide, potassium hydroxide, neutral salt aqueous solution, 10 percent sodium hypochlorite, ammonia, most alcohols, organic acids and aldehydes,ect |
| EPDM | ≤120°C | It has the similar acid and alkaline properties of natural glue, and it is very good for low pressure steam, hot water and cold water. |
| PTFE(F4) | ≤180°C | Strong acid, strong base, strong oxidant, organic solvent, etc |
| FEP(F46) | ≤120°C | Any organic solvents or reagents, xi or concentrated inorganic acids, bases, ketones, aromatics, chlorinated hydrocarbons, etc |
| PFA | ≤180°C | Strong acid,strong alkali,Strong oxidant, organic solvent, etc |

| DN | DN | PN | L | D | D1 | n-∅d |
| EG41W/J/F46 | DN20 | PN10 | 121 | 105 | 75 | 4-∅14 |
| DN25 | 131 | 115 | 85 | 4-∅14 | ||
| DN32 | 150 | 140 | 100 | 4-∅18 | ||
| DN40 | 163 | 150 | 110 | 4-∅18 | ||
| DN50 | 194 | 165 | 125 | 4-∅18 | ||
| DN65 | 220 | 185 | 145 | 4-∅18 | ||
| DN80 | 258 | 200 | 160 | 8-∅18 | ||
| DN100 | 309 | 220 | 180 | 8-∅18 | ||
| DN125 | 362 | 250 | 210 | 8-∅18 | ||
| DN150 | 412 | 285 | 240 | 8-∅22 | ||
| DN200 | 529 | 340 | 295 | 8-∅22 | ||
| DN250 | 641 | 395 | 350 | 12-∅22 | ||
| DN300 | 757 | 445 | 400 | 12-∅22 | ||
| G41FW/J/F46 | DN15 | PN10 | 125 | 95 | 65 | 4-∅14 |
| DN20 | 135 | 105 | 75 | 4-∅14 | ||
| DN25 | 145 | 115 | 85 | 4-∅14 | ||
| DN32 | 160 | 140 | 100 | 4-∅18 | ||
| DN40 | 180 | 150 | 110 | 4-∅18 | ||
| DN50 | 210 | 165 | 125 | 4-∅18 | ||
| DN65 | 250 | 185 | 145 | 4-∅18 | ||
| DN80 | 300 | 200 | 160 | 8-∅18 | ||
| DN100 | 350 | 220 | 180 | 8-∅18 | ||
| DN125 | 400 | 250 | 210 | 8-∅18 | ||
| DN150 | 460 | 285 | 240 | 8-∅22 | ||
| DN200 | 570 | 340 | 295 | 8-∅22 | ||
| DN250 | 680 | 395 | 350 | 12-∅22 | ||
| DN300 | 790 | 445 | 400 | 12-∅22 | ||
| DN350 | 900 | 505 | 460 | 16-∅22 | ||
| DN400 | 1000 | 570 | 515 | 16-∅26 |
FREE-VALVE's manual fluorine lined diaphragm valves are widely used in chemical industry, medicine and other industrial sectors to achieve the cutting of acid, alkali and other corrosive media in the production process.










Audited Supplier









