A.R.I. NR-040 EN - Manual (Page 2)

B. Periodic Maintenance
1. Greasing of the bolt and key of the counter weight.
2. Greasing the bolts of the valve’s cover (lid) .
3. Brush painting of the surface area of the valve body.
4. In case the valve is installed in waste water system , open the valve’s
cover and wash the internal part from dirt, solids and debris
Symptom Cause Corrective action
1 Leakage from the
shaft O-Ring
1) O-ring Elastomer
deterioration.
2) Shaft Erosion at
O-rings contact 1) Change the
O-rings plugs.
2) Replace the complete
shaft.
2 The seats no
properly sealed
(reverse flow
occurring)
1)Hard solid stuck on the
seats
2) Elastomer deterioration.
3) Exaggerated clearance
between the internal parts
due to Erosion
1) Open the upper lid and
clean both the two
seats. If needed,
replace the body seat.
2) Replace the rubber-
lined disc.
3) Change the complete
disc and arm assembly
3 The micro switch
is out of function
The micro switch roller is
no more in contact with the
actuator came Check the tightening of
the came retaining bolt on
the shaft. Carefully fix the
came in the right position
for correct indication.
4 Leakage from the
upper cover
Defective O-ring seal Change the lid O-ring
seal
A.R.I
FLOW CONTROL ACCESSORIES
KIBBUTZ KFAR CHARUV 12932 WWW.ARIVALVES.COM
TEL. 972-4-6761988 FAX. 972-4-6763402 E.MAIL: [email protected]