Use And Care Manual

Hydronic characteristics for TwistFlow- 668S1
To determine the hydronic characteristics of the circuit, we must calculate the total pressure loss experienced by the flow of fluid as it passes
through the manifold components and the radiant panel circuits.
From a hydronic standpoint, the manifold unit and circuits can be shown as an assembly of hydronic elements that are arranged in series and
parallel to each other.
ΔP
Tot = Total loss at the manifold heads
(Flow + Return + Loop)
ΔPBV = Localized loss at the micrometric
balancing valve loop (loop flow)
ΔPLoop = Loop loss (loop flow)
ΔPSV = Localized loss at the shut-off valve in the
panel circuit (loop flow)
Δ PTot = Δ PBV + Δ PLoop + Δ PSV
After noting the hydronic characteristics of the individual components and the design flows, the total loss can be calculated as the sum of the
partial pressure losses of each specific component in the system, as shown in the formula (1.1) .
Note: We can ignore the pressure losses associated with the ball valves and manifolds because their values are so low.
Generally speaking, the total pressure loss is fairly close to the pressure loss of the branched circuit of the panel.
Q
Loop
ΔP
F Man.
ΔP
Ball v.
ΔP
Tot.
Q
Tot.
ΔP
BV
ΔP
SV
ΔP
R Man.
ΔP
Ball v.
BAGNO
CAL EFFI
CAL EFFI
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
HOBBY WC
SOGGIORNO
CAMERA
CALEFFI
BAGNOHOBBY WC
SOGGIORNO
CAMERA
CALEFF
ΔP
Loop
Q
Tot.
ΔP
BV
ΔP
Loop
ΔP
Tot
ΔP
SV
Q
Tot
Q
Loop
(1.1)
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