Si-108 EN0 pages

Datasheett
Ball segment valve - Low noise design (LN)t
Si-108 EN
Edition: 2010-04
Type KVTW LN / KVXW LN t Wafer design
Type KVTF LN / KVXF LN t
Flanged design
Nominal pressurett
PN 20 - 50
Nominal sizett
DN 50 - 250 (W)
DN 50 - 400 (F)
tMaterialttStainless steel
•t Low noise level
•t Control and shut-off
valve
•t One-piece shaft
gives a torque
transmission free of
backlash
•t Excellent tightness
irrespective of
differential pressure
•t Easy maintenance
The SOMAS ball segment valve types KVTW LN and KVTF LN, with centrically mounted
shaft and KVXW LN and KVXF LN with eccentrically mounted shaft, are designed to
reduce noise. KVTW LN and KVXW LN are of wafer design while KVTF LN and KVXF
LN are flanged valves.
The valve body is of one-piece design. The shaft device is also in one piece for torque
transmission free of backlash. The spring-loaded seat is available in three alternative
materials (PTFE, PTFE 53 and HiCo).
Noise reduction is achieved through a low noise trim. This trim is mounted directly to
the segment and consists of a number of bars located in a specific pattern that are used
to split up the pressure drop across the valve. This results in less pressure recovery,
thereby reducing the noise and potential damage due to cavitation. In addition the “LN”
trim can tolerate media containing a small amount of fibers or particles.
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.