Membrane controlled anti-siphon device
Part no. 15 513 52
3 / 12
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INTENDED USE
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The product may be operated in areas that are at risk of flooding or high water, but not in
potentially explosive areas.
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Operating media
Standard
Density
ρ
Fuel
in
kg/m³
Fuel oil EL
DIN 51603-1
860
*) Fuel oil EL A and fuel oil EL A Bio 5 -
50
DIN SPEC 51603-6
860
*) Light fuel oil
ÖNORM C1108 (AT)
-
*) Extra light fuel oil (low sulphur) EL
ÖNORM C1109 (AT)
860
*) Extra light fuel oil with biogenic
components EL
ONR 31115
-
*) FAME
EN 14213 / 14214
900
*) Diesel fuel
EN 590 and DIN 51628
840
*) Other liquid fuels
prEN 12514-1:2009 Annex A
-
*) Rapeseed oil fuel
DIN 51506
930
*) Vegetable oils, (such as cotton seed, soy, wheat germ, castor, palm,
rapeseed, olive, coconut, sunflower, etc.)
-
*) Use of the product with these media is not an element of the general technical approval.
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SAFETY DEVICE AGAINST SIPHONING
There is a risk of liquid fuels escaping while the burner/pump is not operating due to the
pressure of the fuel column in the suction line if:
the minimum liquid level in the tank is above the lowest point in the suction line (
∆
H
),
a feed line is below the highest level of the operating tank of a pump unit.
This is described as siphoning. A safety device against siphoning prevents this.
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PRINCIPLE OF OPERATION
If the feed system is not operating, the suction line is blocked by the spring-loaded valve in
the HS-V.2.
This valve opens with the vacuum generated when the pump unit starts up.
If there is a leak in the suction line when the burner is not operating, the HS-V.2 remains
closed and thus prevents fuel escaping.
The HS-V.2 is equipped with an integrated safety device against excess pressure – known
as a pressure relief valve. If, while the system is not operating, the pressure rises due to a
rise in temperature, for example, the valve opens towards the tank in relation to the safety
level that is set, approx. 0.2 ÷ 2 bar.
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