FNW FNW731V08, FNW732V08 User Manual

Figure 731 & 732

BUTTERFLY VALVES

RESILIENT SEATED BUTTERFLY VALVE

valves are designed to meet the rigorous
requirements of industrial applications such

and utilities, chemical/petrochemical, food and
beverage, OEM and HVAC. Each valve is
manufactured in accordance with independent

both directions of operation to assure bubble­tight service for many years.

Features:

•

• Standard stainless steel disc and stem offer
superior strength and chemical resistance

• Mounting pad with square shaft permits
direct mount actuation that reduces
hysteresis and cost (2" TO 12")

• Secured stem retainer plate for blowout-proof
protection and also allows operator removal
with valve in line

• High strength two-piece stem eliminates

Fig. 731

• Rated to 255 PSI (2"-12"), 188 PSI (14"-24")

• Cartridge style seat permits easy change
without special tools

•
gaskets*

• Lockable Handles

•

•
PSI** (2"-12"), 100 PSI** (14"-24")
Wafer bodies cast iron to 10", ductile iron 12"

•
to 24", and ductile iron lug bodies to 24"
Lever operated to 12" or gear operated

•

•
and improved stem alignment
Vacuum rated to 29.9196"Hg (0.01 Torr)† •

•

• Low maintenance design
Sizes 2" to 24" •

Standards:

• NSF 61 Annex G Certified
(Annex G references NSF 372)

•

•

•

Options:

Fig. 732

Pressed collar style angle face rings (typically sizes 2" to 6") are not recommended due to the large
radius of the inner diameter. Cast type angle face rings or stub ends should be used with light wall

engages the valve seat face.

Actuation including chain wheels, square drive
nuts, worm-gear operators, and pneumatic and
electric operators, control accessories, stem

.

FNW.COM

BUTTERFLY VALVES

VIEW OF "A"

731 Wafer / 732 Lugged - Sizes 2" to 12" (also available with gear)

Figure 731 & 732

731 Wafer / 732 Lugged - Sizes 14" to 24"

U

H3

H2

H1

T

P

A

D

B

L1

Lo

24

4A

4B

10

G2

1

3

2

4

7

6

8

9

5

4

20 21

WAFER

22 23

HxN on

LUG

4 x

G1

S

C b.c.

12 11

18"~24"

BOTTOM

ASSEMBLY

W1

X

Q

W2

TOPWORKS

2

Phone: [phone] ~ Fax: [phone] ~ www.FNW.com

Figure 731 & 732

BUTTERFLY VALVES

Dimensions (Inches) Sizes 2 to 12

SIZE A B ØD

Size A B ØD H1 H2 G1 G2 L1 ØC ØH N H3 ØU P ØQ ØS ØT W1 W2 X

H1 H2

731 732 731 732

H3 H4 L1 L2 G1 G2 ØC ØH N P ØQ ØS T ØU ØV

Dimensions (Inches) Sizes 14 to 24

Standard Materials

Ref. No. Description Material Qty Remarks

Galvanized

Galvanized

Stem Bushing

Lower Hard Bushing

Body

Seat

Disc

Lower Stem

Lever

Lever Washer

Lever Bolt

Gear Housing

Gear Drive

Hand Wheel

Gear Mounting Bolt

Phone: [phone] ~ Fax: [phone] ~ www.FNW.com

3

Figure 731 & 732

Replacement Seats

BUTTERFLY VALVES

Weight (Lbs)

Size Wafer/Lever Wafer/Gear Lug/Lever Lug/Gear

2" 7.8 15.9 8.0 16.0

2-1/2" 8.8 16.9 9.9 18.0

3" 9.4 17.5 10.3 18.4
4" 10.8 19.0 15.3 23.5
5" 15.2 23.4 19.4 27.6
6" 18.4 26.6 21.5 29.7

8" 27.3 42.9 36.1 51.7
10" 44.5 61.1 58.1 74.8
12" 60.1 82.0 81.1 103.0
14" - 107.6 - 146.2
16" - 161.8 - 196.0
18" - 202.0 - 268.3
20" - 305.1 - 367.8
24" - 472.1 - 522.6

SIZE

20° 30° 40° 50° 60° 70° 80° 90°

DEGREES of DISC OPENING

Torque (In-Lbs)

Size EPDM & BUNA Seat VITON Seat

2" 367 477

2-1/2" 367 477

3" 480 624
4" 593 771
5" 649 844
6" 971 1,262

8" 1,896 2,465
10" 4,006 5,208
12" 4,627 6,015
14" 13,385 17,401
16" 17,506 22,758
18" 23,542 30,605
20" 29,076 37,799
24" 46,847 60,901

1. All unseating torques based
on non-corrosive clean, wet or
lubricating service at ambient
temperatures. Contact FNW for

2. For line velocities greater than
15 FPS, dynamic torque must be
taken into consideration.

3. All torques are based on
maximum pressure differential for
the valve.

Torque values shown are

4.
reflective of a 30% safety factor.

2" 8 9 18 28 55 72 110 135

2-1/2" 10 15 27 44 85 110 168 210

3" 15 23 39 65 130 165 250 310
4" 27 41 71 115 230 300 465 540
5" 58 86 150 245 480 610 980 1,100
6" 96 140 245 400 785 1,010 1,615 1,910

8" 165 245 410 685 1,275 1,715 2,670 3,185
10" 255 380 650 1,130 2,100 2,700 4,250 4,900
12" 370 540 950 1,570 3,050 3,950 5,950 7,350
14" 450 750 1,300 2,210 4,080 5,610 8,078 11,200
16" 640 900 1,720 2,790 5,000 7,650 10,770 12,900
18" 730 1,250 2,295 3,700 7,050 9,180 13,900 17,500
20" 910 1,595 2,850 4,630 8,600 11,500 17,540 22,400
24" 1,250 2,290 4,000 6,090 12,500 16,500 23,590 28,300

Cv is the volume of water in U.S. gallons per minute that passes through the valve at a pressure drop of 1 PSI at 68°F.

Figure Number Matrix

F N W 7 3 1 E G X

BODY TYPE SEAT OPERATOR SIZE CODES

12==Wafer

LugEB

V

=

EPDM

=

BUNA-N

=

Viton®

BlankG==10 Position Lever

(2”-12”)
Gear Operator
(2”-24”)

2-1/2

2

=

K

10

=

L

12

3

=

M

14

4

=

P

16

5

=

S

18

6

=

U

20

8

=

X

24

=

10

=

12

=

14

=

16

=

18

=

20

=

24

Seat Temperatures

Seat Material Working Temperature

EPDM

Buna-N

Viton®

-22° to 230°F

(-30°C to 110°C)

-4° to 194°F

(-20°C to 90°C)

-14° to 320°F

(-25°C to 160°C)

Buna-N Size Codes

2

=

K

10

=

2-1/2

=

L

3

=

M

4

=

P

5

=

S

6

=

U

8

=

X

DOC: FNW731-732V08 Ver. 1218 1074762

FNWB731

© 2018 - FNW. All rights reserved.
The FNW logo is a trademark of Ferguson Enterprises, Inc., PL Sourcing, PO Box 2778, Newport News, VA 23609

The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be construed as
warranties or guarantees, expressed or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and

10

12

=

12

14

=

14

16

=

16

18

=

18

20

=

20

24

=

24