A fully lined solution according to ISO 5752/5 short (EN 558-1/T5) with various corrosion resistant disc and liner materials to satisfy demanding customer requirements.
Features include
One of the most important features of the NeoTecha butterfly valve is the stem seal. The pressure to keep the two sealing surfaces together is provided by an upper and lower set of Belleville springs resulting in a superior stem seal, which is TA-Luft VDI 2240 approved.
The elastomer back-up pads behind the liner ensure a tight fit around the disc, giving a bubble tight shut-off at minimum operating torque.
The liner and disc are the only two valve parts in contact with the medium.
Vacuum tests with helium have been performed successfully with pressures less than 0.003 psi absolute
Optional TFM lining available for extremely demanding applications.