Danfoss VFS 2 Ficha de dados - Página 5

Procurar online ou descarregar pdf Ficha de dados para Unidade de controlo Danfoss VFS 2. Danfoss VFS 2 8 páginas. Seated valve for steam pn25, 2-way valve, flange

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Data sheet
Control valve sizing diagram for steam
Max. Δp in low pressure steam application variance from 0.5 bar to 6 bar (see page 2)
© Danfoss | 2016.11
VFS 2
Steam valve sizing is based on 40 % of the
absolute steam pressure (immediately upstream
of the valve), being dropped across the valve
when fully open. At this condition the steam
is travelling at or close to its critical velocity
Critical Pressure Drop (kPa)
(approx. 300 m/s) and throttling will occur over
the full valve stroke. If the steam is travelling
slower than this then the first part of the valve
stroke will merely increase the velocity of the
steam without reducing the volumetric flow.
Superheat °C
VD.HC.L3.02 | 5