FREE-VALVE PTFE Lined WaferType Check Valve is wafer type design and manufactured in full port uni-directional body design fully lined with FEP, PFA .The valve uses PTFE as the valve disc, the valve can be opened or closed by disc rolling up and down in the slide of the body chamber body under the medium acting.Under normal flow the valves solid PTFE disc is pushed away from it's seat and fluid flows through the valve,in a backwards flow condition the ball is pushed firmly back into it's seat and prevents flow through the valve stopping process, etc.
1. The valve body adopts full bore, with large flow and small resistance.
2. Good sealing performance, noiseless closing, no water hammer.
3. Horizontal or vertical installation is acceptable.
4. Fully Lined Design to eliminate surface contact which provides maximum corrosion resistance
| 1 |
Size Range |
DN15~DN600 |
| 2 |
Nominal pressure |
Class 150 /PN10/PN16 |
| 3 |
Applicable Temperature |
-10ºC~+180ºC |
| 4 |
Connection Type |
Wafer |
| 5 |
Lining Material |
PTFE , PFA , FEP |
| 6 |
Ball |
PTFE |
| 7 |
Seat |
PTFE , PFA , FEP |
| 8 |
Pressure test |
GB/T13927, API598 |
| 9 |
Face to Face |
GB/T12221, ASME B16.10 |
| Lining material |
Service temperature,°C |
Application medium |
| NR |
-10°C~+85°C |
exclusive of strong oxidants: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 |
FREE-VALVE Flanged Fluorine PTFE Lined Floating Ball Type Check Valves are mainly used in cold water, chemical and other pipe networks to prevent media flow back.
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