RESILIENT-SEATED CARTRIDGE STYLE
FNW7XX
BUTTERFLY VALVE
INSTALLATION INSTRUCTIONS
FNW.COM
We reserve the right to modify or improve the designs or
specifications of our products at any time without notice.
11
Inspection Descriptions
Inspection Points
Inspection Procedure
Countermeasure
Fluid External leakage
Pipe joints
Visual check
Re-tightening the piping bolt and nuts. Align the
valve center with the pipe center and retighten the
piping bolts.
Bottom & valve surface
Visual check
Disassembly and maintenance. Spare part
replacement if required. Valve replacement
Abnormal noise,
vibration
Appearance of the valve
and actuator, piping
around the valve bolts
and nuts
Listening
Check by touch
Change the valve opening. Review the flow rate
and pressure. Re-tightening the bolts and nuts.
Remove the source of vibrations. Disassembly and
maintenance. Check for damage of the parts.
Looseness of the bolts
and nuts
Bolts and nuts
Visual check
Check by touch
Re-tighten the bolts and nuts. Retighten the
pressure part after reducing pressure.
Seat leakage
Presence or absence
of leakage from the
secondary side
(Flow meter, pressure
gauge, drain)
Listening, Visual
check, Measurement
Check the opening and closing positions are
correct with the indicator. Remove foreign material.
Remove the valve from the piping and perform
check and cleaning. Replace spare parts.
Valve operation check
Check of opening and
closing positions
Visual check,
Operation check
Check that the opening and closing positions are
correct with the indicator.
If repair parts or service information is required, please locate valve identification information and supply following information:
•
Valve Figure Number
•
Valve size/class
•
Manufacturer date/Valve serial Number