Introduction
Thank you for purchasing this quality product. To minimize the risk o injury we urge that our cli-
ents take some basic sa ety precautions when using this device. Please read the operation in-
structions care ully and make sure you have understood its content.
Keep these operation instructions safe.
Please ensure that you have read and understood the instructions and sa ety notes o the ex -
pansion vessel be ore use.
Sa ety notes
⚠Warning!
To avoid any injuries, ensure that all air is expelled and the water pressure is released from
the pressure system before the expansion vessel is opened.
We highly recommend to protect the system with a suitable pressure relief valve set to or be-
low the maximum vessel pressure.
The pre-charge should be approx. 0.1–0.2 bar below the start-up pressure of the pump and
needs to be checked regularly.
If the exact pressure settings are not complied with, the EPDM rubber membrane of the vessel
might be damaged. n exact calculation can be lead from the start-up pressure of the pump ×
0.9. Example: Start-up pressure of the pressure switch of the domestic waterworks is set to
1.5 bar: 1.5 bar × 0.9 = 1.3–1.4 bar.
The maximal water temperature as well as the maximal working pressure can be seen on the
type plate of the expansion vessel.
If the expansion vessel shows any signs of leakage, rust or any other damage, it must not be
used any more!
The expansion vessel installation needs to be according to regional and national regulations.
Protect the vessel, piping and any further components from cold temperatures and frost.
Product In ormation
Expansion vessel
The expansion vessel is designed for a maximal pressure of 5.4 bar and thus is tested for its tightness
by the manufacturer with up to 5.4 bar water pressure.
The expansion vessel has a 32.89–33.25 mm connection. dditionally, it has an integrated valve (sim-
ilar to a car tyre valve) to check the counter-pressure for the rubber membrane and to adjust it if ne -
cessary.
Ethylene propylene diene monomer rubber membrane (EPDM)
The vessel is equipped with a heat and age-resistant EPDM rubber membrane. The rubber that the
membrane is made of belongs to the elastomers. The synthetic rubber is especially resistant against
hot air, weathering and ozone influences. The elastomer shows low gas permeability, good resistance
to chemicals as well as good absorption of oscillation and impact energy of up to 100°C.
In the low temperature range, the rubber remains elastic up to -70°C. It is mainly used for air hoses
and inner cores of tyres, bladders, steam hoses and linings for tanks. Other fields of application are
foils, membranes, non-vulcanised sealants and bands.
The EPDM rubber is even allowed as chewable mass for chewing gum according to nnex 4 of the
German Food dditive Regulation. Consequently, the material is suitable for drinking water installa-
tions according to this.
© by WilTec Wildanger Technik GmbH Item 50600, 50602, 50640–50643, 50645–50648 Page 3
http://www.WilTec.de
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