afriso Flow-Control Mode D'emploi page 41

6 Operation
6.1 Pressure mode
Tanks mounted up to 4 m higher do not affect the function of the product. Use
protection equipment against siphoning (anti-siphon valve) in the suction line.
If a de-aerator is required in a pressure system, suitable safety-related equip-
ment must be installed so the the maximum permissible inlet pressure of 0.7
bar cannot be exceeded.
Use Flow-Control 3/K HT with an upstream filter and a brass filter cup as a
de-aerator.
6.2 Liquid level in the float housing
The liquid level depends on the operating conditions of the system and
amounts to approximately 20-50 mm in suction mode. If the liquid level is
higher, the float housing may be completely filled with fuel. When the operat-
ing conditions change, for example, decreasing liquid level in the tank, the air
cushion is formed again in the float housing.
6.3 Use in flood hazard areas
INOPERABLE PRODUCT
• Verify that the product (without vent hose) is replaced after a flood.
Failure to follow these instructions can result in equipment damage.
With a connected vent hose, the product is suitable for use in flood hazard
areas; it is watertight up to 10 mH
The product with vent hose continues to be operative after a flood.
 Verify that the end of the vent hose is located at the return connection of
the tank or ends above the maximum possible water level.
Operation
NOTICE
O (1 bar pressure).
2
Flow-Control
EN
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