A.R.I. NR-030 User Manual

NR

-

030 CHECK VALVE

MAINTENANCE INSTRUCTIONS

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 (11) will be installed so the

arm turns down at a 450 angle when the 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.

 Stainless Steel shaft (12) – it is forbidden to weld or to coat

the shaft.

B. Periodic Maintenance

1. Greasing of the bolt and key of the
counter weight.

2. Brush painting of the surface area of the
valve body.

A.R.I FLOW CONTROL ACCESSORIES

KIBBUTZ KFAR CHARUV 12932 WWW.arivalves.com
TEL. [phone] FAX. [phone] E.MAIL: [e-mail]

N-030

Symptom Cause Corrective action

1 The seats no properly sealed

(reverse flow occurring)

2 Leakage from the shaft O-

3 Leakage between the body

and the plugs

1) Hard solid stuck on the seats

2) Elastomer deterioration.

3) Exaggerated clearance
between the internal parts due
to Erosion

1) O-ring Elastomer

Ring

deterioration.

2) Shaft Erosion at O-rings
contact

The fiber seal broken. Replace the fiver seal.

1) Dismantle the N-030 from
the line and clean both the
two seats surfaces.

2) As above and change the

elastomer seal.

3) Change the complete disc

and arm assembly

1) Change the O-rings plugs.

2) Replace the complete
shaft.

A.R.I FLOW CONTROL ACCESSORIES

KIBBUTZ KFAR CHARUV 12932 WWW.arivalves.com
TEL. [phone] FAX. [phone] E.MAIL: [e-mail]