FNW 345A, 355A User Manual
FIGURE 345A, 355A
PVC
160
CPVC
Pressure (psi)
THERMOPLASTIC VALVES
TRUEUNION BALL CHECK VALVE
FIGURE 345A PVC WITH NPT AND SW ENDS
FIGURE 355A CPVC WITH NPT AND SW ENDS
FEATURES
• Pressure Rating: 150 PSI @ 73°F
• 5 PSI minimum shuto
• Temperature Range:
• PVC: 41°F–122°F (5°C–50°C)
• CPVC: 32°F–194°F (0°C–90°C)
• EPDM or FPM (Viton®) seals
• Both NPT & socket ends included
• For vertical and horizontal installation*
• With flow direction arrow
• Machined and tumbled ball for hermetic seal
• Easy maintenance
• 5 PSI cracking pressure
*For vertical up flow only, not down flow. In horizontal installations, standard line drop typically will not allow the
ball to seat (a back pressure dierential of 5 PSI minimum is needed for shuto).
STANDARDS
Connections
• Threaded Dimension: ASTM F 1498, ref. ANSI B1.20.1
• Socket Dimension: PVC ASTM D 2467; CPVC ASTM F 439
Materials
• PVC: Cell classification 12454 per ASTM D1784 (formerly Type I, Grade 1)
• CPVC: Cell classification 23447 per ASTM D1784 (formerly Type IV, Grade 1)
CPVC
PVC
PRESSURE/TEMPERATURE
140
120
100
80
60
40
20
0
32 41 104 122 140 194
Temperature (Fº)
FIGURE NUMBER MATRIX
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©2020 Ferguson Enterprises, LLC 0420 1731963 We reserve the right to modify or improve the designs or specifications of our products at any time without notice.
FNW 3 4 5A E G
Body Type Seals Size Codes
4 = PVC E = EPDM 1/2 = D 1-1/4 = H
5 = CPVC V = FPM (Viton®) 3/4 = F 1-1/2 = J
1 = G 2 = K
CV & WEIGHTS
Size Cv Weight (lbs)
1/2" 10 0.44
3/4" 26 0.7 1
1" 37 0.99
1-1/4" 40 2.54
1-1/2" 80 2.25
2" 152 3.9
FIGURE 345A, 355A
THERMOPLASTIC VALVES
TRUEUNION BALL CHECK VALVE
ABOUT PVC
• Unplasticised Polyvinyl Chloride, or PVC, is the most widely
used of all plastics and commonly used for pressure pipes,
fittings, and valves. It is rigid, suitable for above and below
ground applications. PVC has good chemical resistance and is
odorless and tasteless. It is for use with liquids and gases with
temperatures +32ºF to +140ºF* (for higher temperatures see
CPVC) at a wide range of operating pressures. Some poorer
quality PVC can leach chemicals into water which can build up
in recirculation systems, however most modern pipe is built to
specific standards (e.g. BS3505/6, ASTM D 1785, ASTM D2241,
DIN 8061/2, KIWA 49, BS4346 PART 1, DIN 8063) to control this.
ASTM D1784 controls the compounds for rigid PVC and CPVC.
Note: Other materials within valves besides PVC and CPVC can have an aect on the temperature limits of the valve. Temperatures noted above are for the thermoplastic
material alone.
ABOUT CPVC
• Chlorinated Polyvinyl Chloride, or CPVC, has been oering the
process industry superior corrosion resistance, mechanical
strength, and excellent life-cycle economics in a single package.
Conceptually, CPVC is a PVC homopolymer that has been
subjected to a chlorination reaction. It is generally inert to most
mineral acids, bases, salts, and paranic hydrocarbon solutions.
CPVC is not recommended for use with chlorinated or aromatic
hydrocarbons, esters, or ketones. The upper temperature limit
on CPVC is 200°F*. There is no lower temperature limit on CPVC
and the material will withstand pressure. However, at very cold
temperatures, the material will become brittle and the impact
strength will decline.
PART MATERIALS & QUANTITY
Materials
Ref # Parts
1 Body PVC CPVC 1
2 Ball PVC CPVC 1
3 Seat Carrier PVC CPVC 1
4 End Connector PVC CPVC 2
345A 355A
EPDM Viton® EPDM Viton®
Qty
* Threaded and socket weld unions.
5 Seat EPDM
6 Solid End O-Ring EPDM
7 Union Nut PVC CPVC 2
FPM
(Viton®)
FPM
(Viton®)
EPDM
EPDM
FPM
(Viton®)
FPM
(Viton®)
DIMENSIONS INCHES
Size D1
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
0.59 0.848 14 4.094 2.126 0.875
0.787 1.058 14 4.725 2.492 1
0.984 1.325 11.5 5.345 2.874 1.125
1.26 1.67 11.5 6.937 3.842 1.25
1.575 1.912 11.5 6.937 3.842 1.375
1.969 2.387 11.5 7.677 4.744 1.5
d
Socket Thread
L B P
1
1
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©2020 Ferguson Enterprises, LLC 0420 1731963 We reserve the right to modify or improve the designs or specifications of our products at any time without notice.
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