Product DescriptionCuztomized Export Model is the model for Export
Only,In order to protect our oversea area dealers ,no sales to
inside China, only direct export to authorized countries.Or you can
find the equivalent model from our open modelsThere are two main
types of Expansion Vessel dependent on what application you have.
You will normally find a Red Vessel (Heating Vessels) to be
used on a Sealed System Heating application whilst the most
common use for a Blue Vessel or White Vessel (Potable Vessels)
would be in a potable application such as an Unvented Water
Heater or a Pumped System.Potable Expansion Vessels are built
from different materials than Heating Expansion Vessels to ensure
that the water is contaminant free and safe for human consumption.
Expansion Vessels operate on the basis that the internal chamber is
separated by a rubber membrane, inside this membrane sits the
water and surrounding this sits a pocket of air--For some
models are filled with nitrogen gas up to 99.9% purified. As the
water inside the sealed system is heated the water pressure
increases, as water is non compressible the air inside the air
chamber of the Expansion Vessel will become compressed thus leaving
the system safe from over pressurization. As water can increase by
4.5% volume when heated from 0-100 DegC an Expansion Vessel is
a vital part of any sealed heating system.Expansion Vessels
can be supplied with a replaceable or fixed membrane depending
on your preference and the pressure within the Vessel is set using
a Schrader Valve just like you would find on a bicycle
tyre.Expansion Vessels are commonly used on pumped systems to
remove the requirements of a continuous pump. This works as
the user will set a low and high pressure on the pump
settings, when the water pressure reaches the lowest setting the
pump will engage and fill the Expansion Vessel to the high pressure
point and stop. Once this cycle has been completed the Expansion
Vessel puts the stored water under pressure ensuring higher
pressure water. This will continue until the Expansion Vessels
pressure drops to the lower point and the pump starts its cycle
again.At Taizhou Tianyang Electrical
Co.,LTD, we manufacture Expansion Vessels according to
afferent requirements from other clients , to help you find
the vessel you require please find below contact information of our
sales staff,we can make our best offer to you as soon as your
details requirements come.Please find the open model by referring
to our catalog.We have a lot of stock for fast shipment with
Dezhi/Auqa Leader Brand.If you have your own drawing for tanks or
your own trade mark for OEM Service,feel free to contact
us.Cuztomized Export Model is the model for export ONLY,In order to
protect our area oversea dealers ,no sales to inside China ,only
direct export .DescriptionAn expansion vessel, pre-charged with
nitrogen instead of compressed air, to meet the requirements of
most heating systems and for use with potable water. The Expansion
vessels for potable water systems are manufactured to meet the
requirements of PED 97/23/EC Directive and BS EN 13831:2007 'Closed
expansion vessels with built in diaphragm for installation in
water'.Why use Nitrogen Instead of Compressed Air?The oxygen in
compressed air permeates through the membrane, reducing the pre
charge pressure. Duringnormal function, oxygen oxidizes the
membrane in the vessel, causing under-inflation and deterioration
of the rubber.Dry nitrogen by comparison maintains proper inflation
pressure longer, will not corrode the inside of the vesseland
extends valve and expansion vessel life. Industry research
indicates that oxidative aging is one ofthe primary causes of
decreased vessel life. Oxidative aging that is caused by the
diffusion of oxygen from thepressurized air cavity of the vessel to
the outside atmosphere.Tests have shown that if vessels are
inflated with nitrogen, there is a significant reduction in
failure.How does Nitrogen help?While both nitrogen and oxygen can
permeate rubber,nitrogen does it much more slowly. It might take
6 monthsto lose 2psi with nitrogen, compared to just
a month with air. And nitrogen is far less reactive. It
doesn't cause rustor corrosion on steel or aluminum, and it doesn't
degrade the rubber seal used in the pre charge valve extending
valve core life and help prevent core leaks.Technical
Parameter NamePotable Water Expansion VesselApplicationFor
sanitary hot water systemsMax. working pressure10 barMax.
temperature100°CFactory air pre-charge4.0 bar nitrogenCapacity200
LtrUseful Capacity168 LiterShellCarbon steelConnectionsG
1 1/2" Stainless Steel Grade 304DiaphragmReplaceableMembrane
Material Synthetic rubber compoundVessel Diameter 556
mmVessel Height1236 mmContact PersonMr.Tom Lee
(TomATcndezhiDOTCOM)Technical Drawing For Your ReferenceDifferent
Optional Flange For Your ReferenceCompany Profile
Taizhou Tianyang Electrical co.,LTD. Is located in Shangma
industrial Zone,Shitang Town,Wenlin
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