- Neotecha NeoSeal PTFE lined butterfly valves are designed according ISO 5752/5 short (EN 558-1/T5) with various corrosion resistant disc materials.
- These valves are ideally suited for corrosive applications, requiring reliable performance, tight shutoff, constant torque and no maintenance.
FEATURES
SPECIFICATIONS
DRAWINGS & DOCUMENTS
- The pressure to keep the two sealing surfaces of the stem seal together is provided by an upper and lower set of Belleville springs resulting in a superior stem seal, which is TA-Luft / VDI 2440 approved.
- The elastomer back-up pads behind the liner ensure a tight fit around the disc, for a bubble tight shut-off.
- The liner provides a wide flange sealing surface.
- A one piece thin disc stem lined with 3 mm molded PFA providing high Kv values.
- The liner and disc are the only two valve parts in contact with the medium.
- Primary shaft sealing by preloaded contact between disc and liner hub.
- Secondary shaft seal by oversizing the shaft diameter in relation to the shaft hole in the liner.
- The liner and disc are molded and machined to close tolerances to provide:
- low torque
- less stress and deformation during opening and closing
- Vacuum tests with helium with pressures less than 20 Pa absolute (0.2 mbarA).
- Optional TFM lining available for extremely demanding applications.
- Integral body locating holes to ensure precise centering of the valve.
- Actuator flange and stem dimensions acc. ISO 5211.
| Material | Ductile Iron |
| Operating Temperature | Less Than 200 C |
| Pressure Class | PN |
| Seat/Seal Type | Lined |
| Valve Size Standard | DN |
| Valve Type | Butterfly |