R AINPLUS AND CONVENTIONAL SYSTEMS : A COMPARISON 1VALSIR S.p.A. – Ufficio Progettazione Impianti.
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RAINPLUS AND CONVENTIONAL SYSTEMS: A COMPARISON 1 VALSIR S.p.A. – Ufficio Progettazione Impianti
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Transcript of R AINPLUS AND CONVENTIONAL SYSTEMS : A COMPARISON 1VALSIR S.p.A. – Ufficio Progettazione Impianti.
RAINPLUS AND CONVENTIONAL SYSTEMS:
A COMPARISON
1VALSIR S.p.A. – Ufficio Progettazione Impianti
Roof drainage systems
conventional ( or gravity*) roof drainage systems (air + water)
siphonic roof drainage systems (water only OR full bore flow)
Siphonic systems are based on gravity effect too but this designation is used for an easy distinction.
2VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Roof drainage systems
All roof drainage systems are made of:
roof outlets,
pipes and fittings,
clamps and accessories.
3VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Conventional roof drainage systems
Conventional roof drainage systems are made of:
standard outlets,
one stack for each outlet,
stacks’ height equal to the building height.
4VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Conventional drainage systems
Conventional roof drainage systems are made of :
Collectors buried in the ground (even inside the building),
sloped collectors,
Max stack water filling ratio 33% Max collectors water filling ratio 70%
5VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Siphonic roof drainage systems
Siphonic roof drainage systems are made of :
roof outlets with anti-vortex plate,
horizontal collectors installed under the soffit
One single downpipe for each circuit
6VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Siphonic roof drainage systems
Siphonic roof drainage systems are made of :
Downpipes position freely definable (generally on the perimeter of the building,
Horizontal collectors (no slope required)
7VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Conventional roof drainage systems
The outlets of traditional roof drainage systems have no particular insert.
The water flows inside the pipes with a vortex and carrying air.
Pipelines work if appropriate volumes of air are allowed into the pipes.
8VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Siphonic roof drainage systems
In the syphonic systems the outlet is equipped with an anti-vortex plate preventing any air to go inside the pipes.
Pipelines work in a full bore scenario.
9VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Siphonic roof drainage systems
The full bore flow systems is based on the application of the Bernoulli principle.
This principle fixes a relationship between the velocity and the pressure of the water.
10VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Siphonic roof drainage systems
11VALSIR S.p.A. – Ufficio Progettazione Impianti
The engine of siphonic systems is the height of the circuit that generates negative pressure inside the pipes (vacuum).
Negative pressure siphons the water from the roof outlets.
Negative pressure
Neg
ative pressu
re
RainplusThe siphonic drainage
Siphonic systems advantages
12VALSIR S.p.A. – Ufficio Progettazione Impianti
Economical Minimization of the number of roof outlets, Minimization of the pipes size, Minimization of the number of downpipes. Drastic reduction of materials quantities
Space saving Horizontal pipes without any slope, The downpipes can be installed anywhere
RainplusThe siphonic drainage
Siphonic systems advantages
13VALSIR S.p.A. – Ufficio Progettazione Impianti
High performance Pipes are sized to work completely
full of water, high velocity of the water (up to
9m/sec) the system is self cleaning.
Eco-sustainable This system makes the collection
of rain water easy and economical (down pipes positioned in correspondence of water harvesting tanks)
RainplusThe siphonic drainage
Siphonic system advantages
14VALSIR S.p.A. – Ufficio Progettazione Impianti
Time and labour saving Excavation works are minimized thus making
the installations quicker. Smaller pipes = quicker installations Less material = quicker installations
Great design flexibility Down pipes can be installed anywhere in the
building, The drainage lines are not buried in the
ground.
RainplusThe siphonic drainage
Technical comparison
15VALSIR S.p.A. – Ufficio Progettazione Impianti
Example Roof area of 2500 m2. Rainfall intensity 108 mm/h.
RainplusThe siphonic drainage
16VALSIR S.p.A. – Ufficio Progettazione Impianti
Flow rate of 18.75 l/s
Flow rate of 18.75 l/s
RainplusThe siphonic drainage
Technical comparison Example Roof area of 2500 m2. Rainfall intensity 108 mm/h.
17VALSIR S.p.A. – Ufficio Progettazione Impianti
Flow rate of 37.5 l/s
RainplusThe siphonic drainage
Technical comparison Example Roof area of 2500 m2. Rainfall intensity 108 mm/h.
18VALSIR S.p.A. – Ufficio Progettazione Impianti
De 90
De 200
De 200
De 110
De 125
De 110
De 250
Conventional system Roof outlets: 14 x OD 90mm Downpipes: 14 x OD 90mm Side collectors: OD 110 – 200mm Central collector: OD 125 – 250mm
RainplusThe siphonic drainage
Technical comparison
Technical comparison
19VALSIR S.p.A. – Ufficio Progettazione Impianti
De 200
De 200
De 110
De 125
De 110
De 250
Conventional system Pipe: 270 m Fittings: 75 pcs Cost: 8.500 EUR
De 90
RainplusThe siphonic drainage
Technical comparison
20VALSIR S.p.A. – Ufficio Progettazione Impianti
De 160
De 110
Siphonic system Outlets: 9 (Rainplus 50-110) Downpipes: 1 x OD 160 Side collectors: OD 90 – 110mm Central collector: OD 110 – 125mmDe 90
De 110
De 90De 125
De 110
RainplusThe siphonic drainage
Technical comparison
21VALSIR S.p.A. – Ufficio Progettazione Impianti
De 160
De 110
Siphonic system Pipes: 190 m -30% Fittings: 67 pcs -11% Cost: 6.000 Euro -29%
De 90
De 110
De 90De 125
De 110
RainplusThe siphonic drainage
Technical comparison – figures
Conventional Siphonic
Roof outlets 14 9
Downpipes 14 1
Side collectors size 110-200 90-110
Central collector size 125-250 110-125
Pipe quantity 270m 190m
Fittings quantity 75 pcs 67
Cost € 8.500 € 6.000
22VALSIR S.p.A. – Ufficio Progettazione Impianti
RainplusThe siphonic drainage
Less labour + Less materials = less costsFor a more efficient installation
Contact the Team @ UPG Pipe Systems
23VALSIR S.p.A. – Ufficio Progettazione Impianti
Freephone: 0800 473 [email protected] www.upg.net.nz
