7
Task and function
Task
Cooling-water control valves are directly actuated
proportional controllers. They are used to maintain
a constant return temperature in a cooling-water or
cooling-solution return. The return temperature can
be adjusted.
This enables a higher return temperature and there-
fore increased heat absorption by the cooling water
or cooling solution. The consumption of coolant and
energy is therefore reduced.
Cooling-water control valves also ensure the
demand-based supply of coolant to heat exchangers
connected in parallel.
Function
When the equipment becomes hot, the expansion
material in the thermostat expands in volume. When
the return temperature increases, a pin is pushed
out of the thermostat. This opens the orifice. and
increases the flow rate.
A bleed flow is continually present, even when the
equipment is closed. The bleed flow enables the
equipment to react quickly to changes in the return
temperature.
Storing and transporting
the equipment
Attention!
Storing or transporting the equipment
incorrectly can damage it.
➢
Seal off all openings with the supplied –
or comparable – covers.
➢
Make sure the equipment remains dry
and is protected against a corrosive
atmosphere.
Storing the equipment
Store the equipment solely in the following
conditions:
◗
Connecting and sealing surfaces must be
protected against mechanical damage.
◗
The equipment and all components must be
protected against jolts and impacts.
◗
The equipment may only be stored in closed
rooms in the following ambient conditions:
◗
Air humidity below 50%, non-condensing
◗
Clean room air, not salty or corrosive in other
ways
◗
Temperature 5–40 °C.
Make sure that these conditions are constantly
maintained throughout storage.
Transporting the equipment
CAUTION
Risk of injury from the equipment falling.
➢
Support the equipment during transport
and installation.
➢
Wear sturdy safety boots.
