Spirax Sarco 37D, Инструкция по установке и обслуживанию

Страница: 21 / 28

IM-P102-04 CTLS Issue 7
21
To renew the temperature control system
Isolate the valve and zero the pressure. If the plant is still in operation through a bypass valve or if the medium
surrounding the bulb is hot, withdraw the sensor bulb and allow it to cool.
60. Undo the three screws and lift off the adjustment
head.
61. Fix in position the adjustment head of the replacement
thermostatic system. Take care that the limit stop of
the pointer ring is properly located in the slot.
62. Retighten the screws.
Bring the valve back into commission by following as
many steps that are necessary in Section 3.
With a replacement thermostatic system it may be
found that the points cannot be moved far enough
to reach the desired reading on the scale when the
medium around the bulb is at the correct temperature.
If this is so, resetting of the calibration can be carried
out using the special spanner supplied with each
replacement sensor.
63. Fix the pointer in the mid-position of its adjustment
and set the scale to indicate the required temperature.
64. Tighten up the screws.
65. Hold the sleeve with a pair of pliers and loosen the
locking ring, using the special spanner.
66. Still holding the sleeve with the pliers, turn clockwise
if the temperature of the medium being controlled is
too high or anticlockwise if too low.
67. After resetting, tighten up the locking ring with special
spanner.
60
61
62
63
64
65
66
67