User Manual

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Siemens 2-port seat valves PN25 with flanged connection CM1N4373en
Building Technologies 15.11.2010
The VVF52..G valves (for saturated steam / super-heated steam) cannot be used
with pneumatic actuators.
Technical design / mechanical design
4373Z01
4373Z02
Standard version VVF52..
for chilled water, cooling water, low-
temperature hot water, high-temperature
hot water, water with anti-freeze
−20…150 °C
Special version VVF52..G
for saturated steam, super-heated steam
up to max. 600 kPa (6 bar) abs
 180 °C
Depending on the nominal size, a guided parabolic, perforated or slot plug is used that
is directly connected to the valve stem.
The seat is screwed to the valve body with the aid of special gland material.
Schematic representation, design variations are possible.
The two-port seat valve does not become a three-port valve by removing the
blank flange!
Valve cross section