FNW FIGURE 751 Installation, Operation & Maintenance Instructions Manual

FIGURE 751
DUCTILE IRON FLANGED GATE VALVE
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

INTRODUCTION

This instruction manual provides storage, installation, operation and maintenance information for ductile iron flanged gate valves.
This manual describes 300PSI ductile iron valves. Valves are intended for use in water service. Do not use in steam or
hydrocarbon service.

STORAGE

Be careful not to damage the valve stem while handling. If the valves are rack mounted for storage, their packing chambers should
not be in direct contact with the rack. It is not recommended to place the valve directly on the ground or concrete floor.

TEMPORARY STORAGE

If the valve is to be temporarily stored prior to installation, the following rules should be followed:
• Always keep the valve wrapped and protected.
• It is best to store the valve in a dust-free, well-ventilated and low-humidity area.
• If stored outdoors, please ensure that the valve is protected by good environmental protection to ensure that there is no water
accumulation on or in the valve.
• The valve comes with a protective end cap to prevent mechanical damage and prevent the intrusion of dust and foreign objects.
If an end cap is found to be missing after shipping, use the appropriate type of end protector immediately.
• The valve should remain in the half-open position.

LONG TERM STORAGE

If the valve is to be stored for more than one year, it should be prepared following the rules above, as well as the following additional rules:
• Do not store the valve outdoors.
• Remove packaging and apply preservative to exposed areas of the valve.
• Do the following annually:
• Apply lubricant to exposed areas.
• Apply a protective surface coating to the outside of the valve as required. Make sure the surface area is clean before applying
the protective spray.

INSTALLATION

WARNING
To avoid personal injury or property damage due to valve leakage, do the following before installation:
• Shut off the pipeline.
• Completely isolate the valve from the piping.
• Relieve pipeline pressure.
• Drain water from the valve.
• Remove protection cover of the valve.
• Inspect the valve body ports and associated equipment for damage and any foreign objects that may have been present during
shipping or storage. Blow compressed air into the valve, making sure the inside of the valve body is clean.
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