Operation
The butterfly valve is operated by a pneumatic
actuator (selected by the supplier) with
connecting dimensions as per ISO 5211, with
operating pressure of 0,6 MPa. If pressure is
lost, the valve can be operated with a spanner.
Note
Dp - maximum pressure drop (difference in pressure before and behind
the valve) [MPa]
Mk - maximum operating torque [Nm]
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Application
Shut-off valve - version L32 for non-
aggressive liquids and fuel gasses, version
L36 for aggressive services depending on
their type and concentration, for these
temperatures and pressures:
Technical description
The butterfly valve is two-way. The dics is
centrally pivoted on he shaft, which turns in
sliding bearings and are sealed with O-rings.
Arubber collar forms the sealing surfaces and
the flow passage of the body.
Connection
Face-to-face dimensions are as per 3201 K1.
Connecting dimensions allow the valve to be
clamped between PN6, 10 and PN 16 flanges.
Arubber collar forms the sealing surfaces.
Materials
Body grey cast iron (GG-25)
Valve disc L 32 brass (CuZn37)
L 36 stainless steel (1.4581)
Shafts stainless steel (13Cr)
Collar rubber (EPDM, NBR,IIR)
Shaft sealing O-ring (VITON)
Testing
Valve is tested as per DIN 3230.
Installation
The butterfly valve can be installed in
horizontal or vertical piping, centrically
between flanges (in the open position the
valve disc extends beyond the valve body).
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