Igema TG32, Сборка и руководство по эксплуатации, Страница: 14 / 28

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4.4 Corrosion resistance
The safety of the unit is not affected by corrosion if it is used as intended.
5. General Information on the Shutoff Valve
5.1 Information
IGEMA shutoff valves are mostly maintenance-free and easy to handle. All IGEMA valves are
equipped with metal gaskets, the valve spindles are sealed with a gland packing. The shutoff
valve versions go from simple shutoff (designation A1--) to double shutoff (designation A2--).
All main valve spindles are equipped with a quick closure function that ensures that the valve
can be opened or closed with a
⅓ turn.
5.2 Functional principle
Handle/handwheel rotated clockwise: shutoff valve is closed.
Handle/handwheel rotated anticlockwise: shutoff valve is opened.
Tools to increase hand torque are not permitted.
5.3 Self-closing ball safety function
All IGEMA GmbH shutoff valves are equipped with a self-closing ball function.
The self-closing ball is a safety device which automatically closes valve passage of shutoff
valve if e.g. level gauge is damaged (e.g. mica break).
Functioning of self-closing ball is only guaranteed if valve is fully opened.
Residues (dirt, welding beads etc.) can put self-closing ball out of action.
Fig.1 Fig.2 Fig. 3
Ball position during
commissioning or flushing /
purging Ball position during normal
operation Ball position during glass/mica
break or incorrect
commissioning
Caution