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INSTALLATION INSTRUCTIONS
FNW7XX
RESILIENT-SEATED CARTRIDGE STYLE
BUTTERFLY VALVE
FNW resilient-seated butterfly valves have been designed and manufactured for fluid control handling in suitable
mechanical systems. This instruction manual includes installation, operation and maintenance information for the
FNW resilient-seated butterfly valve. It is important to read and understand the following instructions to ensure safe
and trouble-free operation. Failure to follow these instructions may result in reduced valve performance and void the
manufacturer's warranty. This manual addresses manually operated valves, including lever and gear operated only.
For complete actuation, options and accessories information, consult the specific device's manual.
TABLE OF CONTENTS
General Safety .......................................................... 2
General Information ................................................. 2
Transportation ........................................................... 2
Packing and Unpacking .......................................... 2
Storage ........................................................................ 3
Pre-Installation ..................................................... 3-5
Dead-End Service .................................................... 5
Installation Considerations in Piping ................... 6
Installation ............................................................. 7-9
Operation ..................................................................10
Maintenance ....................................................... 10-11
the Valve from the Line ..........................................12
Removal of Valve from Piping ..............................12
Troubleshooting ................................................ 13-14
Part Information ................................................ 15-16
U-Section Part Information ................................... 17
Butterfly Valve Assembly ......................................18
Butterfly Valve Disassembly.................................19
Warranty ...................................................................20
FNW.COM
SCOPE:
The purpose of this manual is to ensure that the valves
supplied are properly installed, handled, operated and
maintained to give trouble-free performance.
This manual covers FNW resilient-seated butterfly valves.
NOTES:
• Read the manual carefully before removal, installation,
maintenance or operation of the valve.
• Refer to general arrangement drawings to identify the
design, as valves may vary in features and parts.
• Pay attention to warnings and illustrations carefully.
We reserve the right to modify or improve the designs or
1
specifications of our products at any time without notice.
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Table of Contents
Related Manuals for FNW 712 Series
Summary of Contents for FNW 712 Series
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Page 1: Table Of Contents
This instruction manual includes installation, operation and maintenance information for the FNW resilient-seated butterfly valve. It is important to read and understand the following instructions to ensure safe and trouble-free operation. Failure to follow these instructions may result in reduced valve performance and void the manufacturer's warranty. -
Page 2: General Safety
The selection of the valve design and materials of construction as related to the specific service application is the sole responsibility of the end user. All FNW BFV have an identification mark (casting or information tag) casted or attached on valve body. Important information, including valve size, class, materials of construction and pressure ratings, are shown. -
Page 3: Storage
WARNING: Personal injury or property damage may result if the valve is installed where service conditions could exceed the valve ratings. FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice. - Page 4 • When installing the valve, actuator facing upward is preferred. Note stem direction carefully when installing at a pump outlet, at an elbow or reducer or when combining a control valve and stop valve. See illustration on next page. FNW.COM We reserve the right to modify or improve the designs or...
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Page 5: Dead-End Service
Do not remove the locking lever, gear or other actuators while the valve is under pressure. 7. DEAD-END SERVICE FNW 7XX Series resilient seated cartridge style valves are not rated for dead-end service. FNW.COM We reserve the right to modify or improve the designs or... -
Page 6: Installation Considerations In Piping
Valve Orientation FNW recommends valve be installed with the stem in vertical position and the actuator mounted vertically directly above the valve. When space restrictions do not allow, valve can be installed in upside-down position. There are special applications where stem should be horizontal. -
Page 7: Installation
If this product is operated while the centers are not aligned, breakage, faulty operation, external leakage or seat leakage may occur. See illustration on next page. FNW.COM We reserve the right to modify or improve the designs or... - Page 8 • After installation, open and close the valve to verify that operations from/to full-open to/from full-close are smooth and disc is not binding or making contact with inside of pipe. FNW.COM We reserve the right to modify or improve the designs or...
- Page 9 If using thermoplastic flange such as PVC, refer to the thermoplastic manufacturer’s recommended bolt torque value. FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice.
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Page 10: Operation
• Never remove the operator from the valve while the valve is in the pipeline under pressure. • Always be sure disc is in the near closed position before removing the valve. FNW.COM We reserve the right to modify or improve the designs or... - Page 11 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 FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice.
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Page 12: Precautions Before Disassembling The Valve From The Line
• Spread the flanges with proper tools and remove valve to substitute seat and disc. (Do not use the valve to spread flanges, because seat damage might be the result.) FNW.COM We reserve the right to modify or improve the designs or... -
Page 13: Troubleshooting
Wearing and deterioration of the seat due to long period of use or high frequency of Replace the seat. opening and closing operations FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice. - Page 14 Parts, such as the disc, shaft, body and joint, are and replacement of the parts may be required. Please contact our damaged. sales department. FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice.
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Page 15: Part Information
ASTM A126 Cast Iron Gear Input Shaft Steel Nickel-Plated Hand Wheel ASTM A126 Cast Iron Gear Mounting Bolt ASTM A283D A36 Steel FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice. - Page 16 INSTALLATION INSTRUCTIONS FNW7XX RESILIENT-SEATED CARTRIDGE STYLE BUTTERFLY VALVE PART DRAWING FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice.
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Page 17: U-Section Part Information
Bronze ASTM B584 C83600 Short Bushing Bronze ASTM B584 C83600 O-Ring Rubber, ASTM AD2000 EPDM Steel U-SECTION PART DRAWING FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice. -
Page 18: Butterfly Valve Assembly
Align the screw holes with the holes in the Secure the retainer plate with flat head product to secure the plug. body’s top flange. counter-sunk screws. FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice. -
Page 19: Butterfly Valve Disassembly
• Make sure a clean area is available to work in and to place disassembled parts. • Parts should be protected from dirt, dust and possible damage. FNW.COM We reserve the right to modify or improve the designs or specifications of our products at any time without notice. -
Page 20: Warranty
Seller. Under no circumstances shall Seller be liable for any special, consequential, incidental, or indirect damages, losses, or expense (whether or not based on negligence) arising directly or indirectly from delays or failure to give notice of delay. FNW.COM We reserve the right to modify or improve the designs or ©2024 Ferguson Enterprises, LLC 0524 6516760...
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