Neotecha NeoSeal Lined Butterfly Valves

Butterfly Valve,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:
• 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 perfect
centering of the valve.
• Actuator flange and stem dimensions
acc. ISO 5211.
• Anti blow-out proof shaft

GENERAL APPLICATION:
The valves are ideally suited for corrosive
applications, requiring reliable performance,
tight shutoff, constant torque and no
maintenance. The valves successfully handle a
multitude of corrosive applications in industries
such as chemical, petro-chemical, pulp and
paper, semiconductor (UPW), foundries and
mining

TECHNICAL DATA:
Sizes: DN 40 - 900 (NPS 1½ - 36)
Pressure: 10 bar (DN 40 - 600) /
145 psi (NPS 1½ - 24)
6 bar (DN 700, DN 800 and
DN 900) /
87 psi (NPS 28, 32 and 36)
2.5 bar (DN 750) /
36 psi (NPS 30)
Temperature: -40°C to +200°C
(-40°F to +392°F)
Flange
accommodation: DIN PN 10/(16)
ASME 150, JIS 10K
Bubble tight shut-off in both
directions, in accordance
with EN-12266-1 leakrate A
(UHMWPE leakrate B).