The Wafer Insert (WV) check valve also known as a wafer check valve is designed to fit between two mating ANSI flanges. Two gaskets are required, instead of the one normally used. The “drop in” wafer check valve body design fits inside the bolt circle for quick installation and removal in rigid piping applications where the use of the Flange Insert check valve (F1, F6, or FP) are not practical. Many valves in this series meet API 594 and/or B16.34 requirements. Consult the factory for complete details.
The Wafer Insert check valve can also be used as a low-pressure relief valve or vacuum breaker by simply using the desired spring settings.
Size & Dimension
Nominal Pipe Size
Size Code
A
B
C
D*
Oricife Diameter
1/2
D
1-3/8
0.62
1.38
N/A
0.348
3/4
F
1-3/4
0.82
1.38
N/A
0.464
1
H
2
1.05
1.38
0.35
0.593
1-1/4
I
2-1/2
1.35
1.63
0.27
0.890
1-1/2
J
2-7/8
1.61
1.63
0.54
1.135
2
K
3-5/8
2.07
2.38
0.17
1.385
2-1/2
L
4-1/8
2.47
2.62
0.31
1.555
3
M
5
3.07
2.88
0.42
2.025
4
N
6-3/16
4.03
2.88
1.25
2.560
NOTES (DIMENSIONS TABLE)*Maximum nominal dimension for a fully open valve with no spring. Consult factory for more information.
ANSI Class 150 - 1500
(1500 PSIG for o-ring seats)
ANSI Class 150 - 900
(1500 PSIG for o-ring seats).
ANSI Class 150 - 600
(1500 PSIG for o-ring seats)
Brass (BR)
1/2" - 4"
ANSI Class 150 - 300
Seat material and spring material selection may limit the recommended service temperature.
See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.
Flow Data
PRESSURE DROP PSI
Size
Cv
1/2
2.4
3/4
4.4
1
6.1
1-1/4
12.7
1-1/2
18.8
2
32.0
2-1/2
42.5
3
89.0
4
144
WATER FLOWRATE - GPM
Note: All flow curves and Cv values presume the valves are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.
Valve Weights
SIZE
PART NUMBER
SS, CS & Alloy
BRASS
1/2
WVD
9.5 oz.
10.2 oz.
3/4
WVF
12.6 oz.
13.5 oz.
1
WVH
1.0 lb.
1.1 lb.
1-1/4
WVI
1.8 lb.
1.9 lb.
1-1/2
WVJ
2.4 lb.
2.5 lb.
2
WVK
5.2 lb.
5.6 lb.
2-1/2
WVL
7.2 lb.
7.7 lb.
3
WVM
11.4 lb.
12.4 lb.
4
WVN
17.2 lb.
18.4 lb.
Valve weights are approximate.
Seat & Cracking Pressure Options
Valve Style
Size Range
Body Materials
Other Options
Allowable Seat Materials
Other Options
Standard Cracking Pressures
Other Options
More Info.
Standard Spring Material
More Info.
WIV
1/2" 1-1/2
316 SS Brass
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
WIV
1/2" 1-1/2
C. Steel
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
WIV
2" - 4"
316 SS Brass
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
WIV
2" - 4"
C. Steel
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
WIV
1/2" - 4"
Alloy 20
Alloy C-276
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/2 PSI
Alloy C-276
WIV
1/2" - 4"
Alloy 400 or MONEL®
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/2 PSI
Alloy 400 or MONEL®
WIV
1/2" - 4"
Alloy B
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
NOTES (DIMENSIONS TABLE)*Maximum nominal dimension for a fully open valve with no spring. Consult factory for more information.
