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BUTTERFLY VALVE
BOLT SPECIFICATION TABLE
PVC & CPVC STANDARD BUTTERFLY VALVE
Valve
No. of
Bolt
Bolt Lengths
Size
Bolt
Torque
Single Side
(in.)
Holes
(ft.-lbs.)
1-1/2
4
12
3-1/4
2
4
25
3-3/4
2-1/2
4
25
4-1/4
3
4
25
4-1/4
4
8
25
4-1/2
6
8
40
5-1/4
8
8
40
5-3/4
10
12
64
6-1/2
12
12
95
6-3/4
14
12
110
9-1/2 or 10
PVC & CPVC BUTTERFLY VALVE WITH LUG INSERT
Bolt Lengths
Valve
No. of
Bolt
Size
Bolt
Torque
Single Side
(in.)
Holes
(ft.-lbs.)
1-1/2
4
12
1-3/4
2
4
25
2
2-1/2
4
25
2-1/4
3
4
25
2-1/4
4
8
25
2-1/2
6
8
40
3-1/4
8
8
40
3-3/4
10
12
64
4
12
12
95
4-1/4
14*
12
110
7
*14" CPVC Lug Insert not available
PVC & CPVC TRUE LUG BUTTERFLY VALVE
Valve
No. of
Bolt
Bolt
Size
Bolt
Torque
Lengths
(in.)
Holes
(ft.-lbs.)
(in.)
1-1/2
4
12
1-1/2
2
4
25
1-1/2
2-1/2
4
25
1-3/4
3
4
25
2
4
8
25
2
6
8
40
2-1/4
8
8
40
2-1/4
10
12
64
2-3/4
12
12
95
2-3/4
14*
12
110
3-1/2
*14" CPVC True Lug not available
1: Minimum bolt lengths based on use of Spears
standard S.A.E. hex bolts and Standard Plate "W" Series fl at washers.
2: Specifi ed bolt lengths are maximum allowable for maintaining proper clearance in
initial Single-Side installation with Lugs where anticipated 2nd Flange installation option
is to be retained without removal of valve.
3: Minimum bolt length through 2-fl anges, 2-gaskets,2-fl at washers and 1-valve body.
(in.)
Bolt
Bolt
1
Diameter
Threads
Dual
(in.)
per inch
O.D. (in.)
Flange
3
4-1/4
1/2
13
4-3/4
5/8
11
5-1/4
5/8
11
5-1/2
5/8
11
5-3/4
5/8
11
6-3/4
3/4
10
7-1/4
3/4
10
8-1/4
7/8
9
8-1/2
7/8
9
12
1
8
(in.)
1
Bolt
Bolt
Diameter
Threads
2nd
(in.)
per inch
O.D. (in.)
Flange
2
1-1/2
1/2
13
1-3/4
5/8
11
2
5/8
11
2
5/8
11
2
5/8
11
2-1/4
3/4
10
2-1/4
3/4
10
3
7/8
9
3
7/8
9
3-1/2
1
8
Bolt
Lug
Diameter
Threads
Washer
1
(in.)
per inch
O.D. (in.)
7/16
14
1/2
13
1/2
13
1/2
13
1/2
13
5/8
11
5/8
11
3/4
10
3/4
10
1
8
®
fl anges, 1/8" full faced gaskets,
5
Valve
No. of
Size
(in.)
Holes
Flat
1-1/2
Washer
2
1-3/8
2-1/2
1-3/4
3
1-3/4
4
1-3/4
6
1-3/4
8
2
10
2
2-1/4
12
2-1/4
14
2-1/2
16
18
20
Flat
24
Washer
1-3/8
1-3/4
1-3/4
CAUTION: The system must be designed and installed so as not to pull the
components in any direction. Pipe system must be cut and installed in such
1-3/4
a manner as to avoid all stress loads associated with bending, pulling, or
1-3/4
shifting. All piping systems must be supported.
2
2
2-1/4
WITHOUT ALLOWING FREE MOVEMENT TO ONE SIDE OF THE
2-1/4
SYSTEM CONNECTION. ADJUST VALVE POSITION AS NECESSARY.
2-1/2
NOT FOR USE WITH COMPRESSED AIR OR GAS
WARNING: Do not use compressed air or gas to test any PVC or CPVC
Flat
thermoplastic piping product or system, and do not use devices
propelled by compressed air or gas to clear the systems. These
practices may result in explosive fragmentation of system piping and
1-1/4
components causing bodily injury or death.
1-3/8
All air must be bled from the system during the initial fl uid fi ll. Pressure
1-3/8
testing of the system must not be made until all solvent cement joints have
1-3/8
properly cured. Initial pressure testing must be made at approximately 10%
1-3/8
of the system hydrostatic pressure rating to identify potential problems prior
to testing at higher pressures.
1-3/4
1-3/4
2
2
2-1/2
© Copyright 2008 Spears
Printed in the United States of America 10/08.
POLYPROPYLENE BUTTERFLY VALVE
Bolt
Bolt
Valve Lay
Bolt
Diameter
Torque
Length
(in.)
(ft.lbs.)
(in.)
4
1/2
12
1-9/16
4
5/8
25
1-7/8
4
5/8
25
2-1/16
4
5/8
25
2-1/8
8
5/8
25
2-5/16
8
3/4
40
2-3/4
8
3/4
40
3
12
7/8
64
3-1/4
12
7/8
95
3-1/2
12
1
110
6-1/4
16
1
110
6-3/4
16
1-1/8
110
7-1/8
20
1-1/8
110
7-3/4
20
1-1/4
110
8-1/2
PRECAUTIONS AND WARNINGS
DO NOT ATTEMPT TO DRAW TOGETHER ANY GAPS
SPEARS
MANUFACTURING COMPANY
®
CORPORATE OFFICE
15853 Olden Street, Sylmar, CA 91342
PO Box 9203, Sylmar, CA 91392
(818) 364-1611 • www.spearsmfg.com
Manufacturing Company. All Rights Reserved.
®
Bolt Lengths
Bolt Lengths will vary according
to thickness of valve, mating
fl anges, washers, nuts and
gaskets used.
The following formula may be
used to calculate bolt length for
installation with mating fl ange
each side:
L = V + 2 ( F + G + W ) + N
L = Minimum Bolt Length
V = Valve Lay Length
F = Flange Thickness
G = Gasket Thickness
W = Washer Thickness
N = Nut Thickness
BF-3A-0307
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