Si-2040 pages

Datasheett
Butterfly valvet

Si-204 EN
Edition: 2013-04

Type VSSt
Wafer design
t
Nominal pressurett
PN 50
t
Nominal sizett
DN 80 - 600
t
Materialtt
Stainless steel

triple
•t Advanceddesign
eccentric
•t Designed for control
and shut-off
applications

•t Designed forup to
applications
350° C (662 °F)

•t Tightness class in
accordance with
EN 60534-4 Class V
as standard
made
•t Solid seatsteel of
stainless
•t Wafer design
(Mounted between
flanges) alt. lugged
design

Option

•t PTFE seat
•t HiNi seat

SOMAS butterfly valve, type VSS PN 50, is a control, on/off and shut-off valve. The valve
is designed to handle a wide range of liquids, gases and steam within a broad temperature range.
The VSS PN50 valve can be mounted between flanges and also supplied in lugged design.
The valves have an advanced triple eccentric design including a unique shape of the disc
allows the use of a solid stainless steel seat. The solid seat remains unaffected by high
flow velocities and temperatures. A good valve function is achieved even on difficult
applications.
The SOMAS valves are delivered ready for installation and operation. The valve
assemblies are delivered factory tested as complete units with actuators, positioners and
accessories.
For nominal pressure PN 25, see type MTV in the datasheet Si-205 (DN 80-500) and
type VSS in the data sheet Si-203 for remaining dimensions (section 2 of the SOMAS
catalogue).