A.R.I. NR-040 User Manual

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GENERAL INSTRUCTIONS
1. Routine service is an integral part of the standard procedure for maintenance of a water supply system.
2. Recommended routine maintenance– once or twice a year, according to the quality and kinds of the fluids in the system.
A. Installation
The valve can be installed either horizontally or
vertically , while the flow is toward the upper part.
The counter weight assembly (1 ) will be installed
so the arm turns down at a 45 valve closes.
Shut-off valve – in order to allow maintenance and
removal of the valve, a shut-off valve will be installed before the inlet and / or after the outlet of the valve, according to the conditions in the pipeline.
It is recommended drainage valves before and after
the valve in order to release the pressure and to drain the line.
Stainless Steel shaft (15) – it is forbidden to weld
or to coat the shaft.
0
angle when the
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
2 The seats no
properly sealed (reverse flow occurring)
1) O-ring Elastomer deterioration.
2) Shaft Erosion at O-rings contact
1)Hard solid stuck on the seats
2) Elastomer deterioration.
1) Change the O-rings plugs.
2) Replace the complete shaft.
1) Open the upper lid and clean both the two seats. If needed, replace the body seat.
2) Replace the rubber- lined disc.
3) Exaggerated clearance between the internal parts
3) Change the complete disc and arm assembly
due to Erosion
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: ari@ari.co.il
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