FNW 340NSE User Manual
145
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Figure340NSE
THERMOPLASTIC VALVES
STEM EXTENSION KIT FOR
FIGURE 340(N) & 350(N) BALL VALVE
Features:
• Simple Two-Piece Design
• Uses Valve’s Existing Handle (sold separately) & PVC
Schedule 80 Pipe (by others)
• Sizes Available for All FNW Thermoplastic Ball Valves
(Figure 340, 340N, 340F, 340NF, 350, & 350N)
• Corrosion Resistant PVC Material
• Kit Contains 1 Handle Adapter & 1 Stem Adapter
Extension Length Table:
Since the gure 340NSE uses PVC schedule 80 pipe between
the kits two adapter pieces, any Desired Handle Height (DHH)
between minimum and maximum can be achieved. Minimum
heights are indicated in the table. Maximum recommended
handle height is 48 inches. To determine the Pipe Length (PL)
needed to achieve the Desired Handle Height (DHH), deduct
the (SUBTRACT) value in the table from the Desired Handle
Height, or...
Valve
Size
PVC
Schedule
80 Pipe
Diameter
(MPL)
Minimum
Pipe Length
(MHH)
Minimum
Handle Height
from (MPL)
(MHC)
Minimum
Height Change
from Standard
Height (SH)
(SUBTRACT)
Amount to Subtract
from Desired
Handle Height (DHH)
for needed Pipe
Length (PL)
FRACTION (Inches)
1/2
3/4
1-1/2 4-1/16 2-1/4 2-5/8
3/4 1-1/2 4-9/16 2-3/8 3-1/8
1 1-1/2 5-3/8 2-9/16 3-7/8
1-1/4
1
1-5/8 5-5/8 2-11/16 4
1-1/2 1-5/8 6-5/8 2-7/8 5
2 1-5/8 7-1/2 3 5-7/8
2-1/2 1-5/8 7-3/4 3-3/16 6-1/8
3 1-5/8 8-3/8 3-1/4 6-7/8
4 1-1/2 2-1/4 11-3/8 4-3/8 9-3/16
Valve
Size
PVC
Schedule
80 Pipe
Diameter
(MPL)
Minimum
Pipe Length
(MHH)
Minimum
Handle Height
from (MPL)
(MHC)
Minimum
Height Change
from Standard
Height (SH)
(SUBTRACT)
Amount to Subtract
from Desired
Handle Height (DHH)
for needed Pipe
Length (PL)
DECIMAL (Inches)
1/2
3/4
1.500 4.063 2.250 2.625
3/4 1.500 4.563 2.325 3.125
1 1.500 5.375 2.563 3.875
1-1/4
1
1.625 5.625 2.688 4.000
1-1/2 1.625 6.625 2.875 5.000
2 1.625 7.500 3.000 5.875
2-1/2 1.625 7.750 3.188 6.125
3 1.625 8.375 3.250 6.875
4 1-1/2 2.250 11.375 4.375 9.188
SH
MPL
MHC
PL
DHH
MHH
PL = DHH - SUBTRACT
146
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Figure340NSE
THERMOPLASTIC VALVES
STEM EXTENSION KIT FOR
FIGURE 340(N) & 350(N) BALL VALVE
Part Numbers
Valve
Size
Part Number
1/2" FNW340NSED
3/4" FNW340NSEF
1" FNW340NSEG
1-1/4" FNW340NSEH
1-1/2" FNW340NSEJ
2" FNW340NSEK
2-1/2" FNW340NSEL
3" FNW340NSEM
4" FNW340NSEP
Installation Requirements
• Correct Size Figure 340NSE
Stem Extension Kit
• Tools for Cutting PVC Schedule
80 Pipe (Recommend Saw &
Miter Box or Wheel-Type Cutter)
• PVC Primer & Solvent Cement
• Length of PVC Schedule 80
Pipe (See Chart for Determining
Needed Length for Desired
Handle Height)
• Marker
• Ruler
Valve
(sold separately)
Stem Adapter
(part of 340NSE kit)
Handle Adapter
(part of 340NSE kit)
PVC Sch’d 80 Pipe
(by others)
Valve Handle
(included with valve)
Installation Procedure
1. Select the proper diameter of PVC schedule 80 pipe.
2. From the Extension Length Table, determine the needed length
of pipe for the desired handle height and then mark the length
of pipe needed.
3. Using a saw and miter box, or a wheel-type cutter, cut the pipe
to length. The pipe must be cut square.
4. To ensure a clean t, bevel and de-burr the pipe ends.
5. Using a ruler and marker, draw an alignment line straight down
the extension pipe piece (end-to-end) to ensure that the handle
and adapters are aligned properly. The printing on the pipe can
be used for this purpose if it is straight.
6. Dry t the adapter pieces and pipe together to determine that
they t and are aligned properly. Do not attach the assembly to
the valve yet.
7. Follow the manufacturer’s recommendations for using the PVC
primer and Solvent Cement to join the adapter pieces to the
pipe, making sure that the pieces are straight according to the
alignment marks or pipe printing.
8. Allow the solvent to cure per manufacturer’s recommendations.
9. With the valve closed, remove the handle by pulling it up while
gently rocking it back and forth. Push the handle onto the top of
the extension. Do NOT use solvent cement.
10. Locate the position of the stop block on the extension piece.
Make sure it is located over the stop gap on the valve and
lower the assembly onto the valve stem. Push the assembly
down while slightly twisting the handle back and forth. Do NOT
use solvent cement. For larger valves (over 2"), it may be
necessary to use a rubber mallet to tap the extension onto the
stem.
PVC SCH 80 PIPE
Alignment
Marks
Stop Block
Stop Gap
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