FNW 310A Installation, Operation & Maintenance Instructions

This instruction manual includes installation, operation and maintenance information for the figure 310A,
310ASW, 311A, and 311ASW 3-piece 1000CWP, threaded end (NPT) or socket weld end (SW) ball valve.
WARNING
To avoid personal injury to your self, fellow workers, or damage to property from release of process fluid, before
installation:
a. Shut off all operating lines to the valve site
b. Isolate the valve site completely from the process
c. Release process pressure
d. Drain the process fluid from the valve site
1. Remove the protective plastic cap from the threaded ends and clean or flush the valve.
2. Before installing the valve, inspect the valve body port and associated equipment for any damage that may
have occurred and for any foreign matter that may have collected in shipping or storage. Make certain the
body interior is clean.
3. Before installing the valve, inspect the pipe line and mating pipe threads, making sure the pipe is free of
foreign material and the threads are clean and have no burrs or pits that could cause leakage.
4. Cycle the valve a couple of times before installation. Valves that are tested to MSS SP-110 may have water
trapped between the ball and body cavity. This can be removed by partially opening the valve, exposing the
cavity to the through port of the ball. Allow the water to drain out.
5. Ensure that piping is aligned properly so there is no tension applied to the valve when installed. Use pipe
hangers or other supports as necessary to properly align piping.
6. For Threaded End Valve:
Use applicable sealant (e.g. - PTFE tape, high temperature pipe seal, etc.) to seal threaded ends on the
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pipeline.
If required for installation (i.e. – The pipe can not be rotated), remove the body bolts and end caps.
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Secure the seats and body seals with tape so they are not lost.
To prevent distortion or damage to the valve, do not apply torque through the valve. When tightening the
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valve, always use a wrench on the end nearest the pipe being tightened. It is preferred that the pipe be
screwed into the valve, holding the valve stationary at the end being connected. Do not use the handle to
tighten the assembly as damage to the valve may occur.
If the valve was disassembled for installation, reinstall the body assembly and reinsert the body bolts.
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SLIGHTLY tighten all bolts, making sure the body and end caps are parallel to prevent distortion of the
end caps during the final tightening phase. Using the torque values in Table 1, tighten the body bolts
evenly. Check the valve for proper operation. The valve should stroke smoothly and evenly with no
binding (Higher seating and unseating torque is normal).
7. For Socket Weld End Valve:
With the valve in the open position and pipe fully inserted into the socket weld ends, tack-weld the valve
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to the pipe in four equidistant points on both end caps.
Remove all but one of the body bolts and loosen the remaining one so that the valve body assembly can
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swing out of the way.
Secure the seats and body seals with tape so they are not lost. It is recommended to temporarily cover
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the body assembly during welding to protect the soft seats and seals from damage.
Finish welding both end caps onto the pipe.
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After all components have cooled, clean all valve surfaces.
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Swing the body back to the original position and reinsert the body bolts.
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SLIGHTLY tighten all bolts, making sure the body and end caps are parallel to prevent distortion of the
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end caps during the final tightening phase.
Using the torque values in Table 1, tighten the body bolts evenly.
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Check the valve for proper operation. The valve should stroke smoothly and evenly with no binding
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(Higher seating and unseating torque is normal).
8. Clean/flush the pipeline and leak test the system prior to using.
DOC: IOM_FNW310(1)A_ ver_4-2011
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
FIGURE 310A & 311A 3-PIECE BALL VALVE
INTRODUCTION
INSTALLATION
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