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High-value HVAC valves from Siemens with further improvements |
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Thursday, 10 July 2008 |
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Siemens significantly extended its
proven range of standard valves of the 21, 31 and 40 series with flanged
connections for use in HVAC plant. The
new valves added to the range offer higher flow rates and together with the
existing range afford finer gradation of the volumetric flow, also resulting
in improved control performance and lower energy consumption.
 The
standard 2-port valves VVF21, VVF31 and VVF40 and standard 3-port valves VXF21,
VXF31 and VXF40 with flanged connections and linear actuators for closed
circuits and pressure classes PN 6, PN 10 and PN 16 plus nominal sizes DN 15
through DN 150 have proven their worth in heating, ventilation and air
conditioning (HVAC) plant and for heat generation and heat distribution. Using
hydraulic simulation, Siemens engineers precisely determined the flow
conditions at extremely high flow velocities and pressures representing 160 m water column to find
the best flow path geometry, aimed at avoiding flow noise, extending life
expectancy and increasing the volumetric flow. As a result, the range of valves
was significantly extended by introducing additional valves with higher flow rates
at the beginning of 2008 (kVS values increased by up to 30 percent).
Thanks to the higher kVS values, a smaller valve actuator will often do,
thus offering attractive savings. For example, to handle a
kVS value of 100 m3/h, a new VXF40.80-100 valve with an electrohydraulic SKD62
or electromotoric SQX62 actuator can be used in place of an VXF40.100 with
SKC62. The new product combinations are much more
favorably priced, reveals the companys press release. |