ITT Engineered Valves 903, Инструкция по установке, эксплуатации и обслуживанию

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6 Maintenance
6.1 Precautions
WARNING:
• All procedures must be performed by qualified personnel.
• When the process fluid is hazardous, thermal (hot or cold), or corrosive, take extra pre-
cautions. Employ the appropriate safety devices and be prepared to control a process
media leak.
• Always wear protective clothing and equipment to safeguard the eyes, face, hands, skin,
and lungs from the fluid in the line.
6.2 Inspection
Inspection area What to look for Action if problem is found
External valve parts Excessive wear or corrosion • Replace the affected parts
• Contact ITT to obtain replace-
ment parts or for specific in-
structions
Non sealed bonnet Fluid weeping from the weep hole Replace the valve diaphragm
Sealed bonnet Fluid weeping from the plug
Loosen the v-notch vent plug 2-3
turns to check
Replace the valve diaphragm
Topworks Spindle binding, excessive noise, or
dried lubricant Lubricate the topworks
Diaphragm and valve body Leakage between the diaphragm and
valve body Tighten the bonnet fasteners
For more information, see:
• 6.5 Replace the valve diaphragm on page 14
• 6.3 Lubrication requirements on page 13
• 4.2 Tighten the bonnet fasteners on page 8
6.3 Lubrication requirements
Lubrication schedule
Remove residual grease prior to re-lubrication. Lubricate the spindle threads, thrust bearing, lower spin-
dle face and neck where it interfaces with the compressor, and o-ring whenever the topworks is disas-
sembled. Bonnets are not equipped with grease fittings and must be disassembled to be lubricated.
Acceptable lubricants
Brand Lubricant type
Chevron FM ALC EP 2 (FDA Compliant)
Fuchs
Cassida FM CSC EP2 (FDA Compliant)
6 Maintenance
Handwheel Operated Valves (903, 913, 963) Installation, Operation, and Maintenance Manual 13