SIAM DUA-1, Руководство по эксплуатации, Страница: 23 / 25

Automatic well sounder “DUA-1”
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3.7. Replacement of the Valve Sealing Ring
The outlet valve O-ring (rubber ring on the valve body) is replaced.
In order to replace the sealing ring, the latter should be demounted
from the well sounder with a sharp tool. Take the ring out of the groove,
clean the groove from dirt with a rag, wetted in gasoline, then wipe the
groove dry and insert a new ring in the groove. Before installation the ring
should be lubricated with CIATIM GOST 6267-80 lubricant. Then the
valve should be put in place.
After a final assembly of the well sounder, it is necessary to carry
out the integrity and strength tests. First, install the well sounder on the
Inspection bench SKU-1 IZM 4.137.003 and test for pressure integrity with
a soap solution at the pressure of 5…8 atm. A slight “seepage” is allowed
with small bubbles in the discharge hole area. "Seepage" in the area of
flexible joint coupling-body is not allowed. Then carry out the pressure
testing of the well sounder, according to Clause 3.6. hereof. The device is
permitted for operation if integrity requirements are met. If not, the sensor
shall be sent to manufacturer for defects elimination.
The addresses of service centers can be found in the product
certificate.