WÄRTSILÄ Vasa R22, Инструкция по эксплуатации, Страница: 243 / 297

The temperatures can be altered only by changing the ele-
ments inside the valve.
19.4.2.4 Changing of thermostatic element
1 Drain as much cooling water as necessary to empty the
valve.
2 Shut off air supply.
3 Loosen the indicator pin (18) but do not remove it from
the tap (17).
4 Remove the tap (17) and the indicator pin.
5 Carefully remove the cover (9).
Notice that the cover is
spring loaded.
6 Remove the complete valve assembly (8).
7 Remove the element cage (7).
8 Remove the retainer ring (16), after which the thermo-
static elements can be changed.
9 Check the parts, including the push rod (5), for wear and
corrosion.
10 Mount the elements and the valve in reverse order.
19.4.2.5 Check of the thermostatic element
The elements can be checked by heating up slowly in water. Put
a strong rubber ring longitudinally over the element and its push
rod to keep the rod pressed into the element.
At the nominal opening temperature, stamped on the element
(for example 4.051.35 means that the nominal opening tempera-
ture is 35°C); the push rod of the element should be flush with the
end surface of the body. At a temperature 10°C higher, the
movement of the push rod should be about 10 mm (i.e. stroke
10 mm from the stamped temperature).
Note! There are two different elements in the valve according to
below.
LT-circuit: one element 35°C and one element 65°C.
19 Cooling Water System 22-9601
19 - 14 VASA 22