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9 Application
9 Application
If the flow velocity in the loop reduces (e.g. because too many
take-off points are opened) and thus drops below a critical
value, the process monitoring system is notified about this by
sensors. If this special valve is applied to the facility, these
take-off points can be selectively chosen and automatically
closed via the central process monitoring system.
To achieve this, the control medium supply, which keeps the
pneumatic actuators in the open position, is interrupted and
all manually opened valves automatically adopt the closed po-
sition (fail-safe condition). This fail-safe condition overrides
the position of the manual handwheel. This reduces the
quantity being tapped at the usage points and the flow velo-
city in the ring main increases back to the required value.
In this resting position (i.e. control medium supply = off/valve
closed), the handwheel then has to be turned clockwise all the
way to the closed position. This means that the valve can only
be reopened by manual operation when the control medium is
switched back on. This prevents the actuator from assuming
the previous open position if the control medium supply is
switched on.
It is important to state in the work instruction that, if the con-
trol medium supply is shut off, the valves must be manually
closed. This prevents the working medium from flowing out at
the take-off points in an uncontrolled manner after switching
the control medium supply back on. The handwheel has no
direct function when the control medium supply is shut off.
However, it does determine the valve position when the con-
trol medium supply is switched back on.
GEMÜ 650TL
10 Manufacturer's information
10.1 Delivery
● Check that all parts are present and check for any damage
immediately upon receipt.
The product's performance is tested at the factory. The scope
of delivery is apparent from the dispatch documents and the
design from the order number.
10.2 Packaging
The product is packaged in a cardboard box which can be re-
cycled as paper.
10.3 Transport
1. Only transport the product by suitable means. Do not drop.
Handle carefully.
2. After the installation dispose of transport packaging ma-
terial according to relevant local or national disposal regu-
lations / environmental protection laws.
10.4 Storage
1. Store the product free from dust and moisture in its ori-
ginal packaging.
2. Avoid UV rays and direct sunlight.
3. Do not exceed the maximum storage temperature (see
chapter "Technical data").
4. Do not store solvents, chemicals, acids, fuels or similar
fluids in the same room as GEMÜ products and their spare
parts.
10.5 Condition as supplied to customer
Condition of the product as supplied to customer: Control
function 1 (normally closed).
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