User Manual

5
Siemens
A6V12045425_en--_b
Smart Infrastructure
2020-08-12
Mechanical design
Ring format, nodular cast iron valve body with EPDM-HT seat and multiple shaft bushing.
The seat is also used to seal the flange. There is thus no contact between the me-dium and
the valve body.
Sizing
Flow diagram
Flow characteristic
p
v100
= Differential pressure across the fully open butterfly valve by a volume flow
100
V

100
V

= Volume flow through the fully open butterfly valve
100 kPa = 1 bar  10 mWC
1 m
3
/h = 0.278 l/s water at 20 °C