Flange Insert (F1, F6, FP) check valves are the ultimate check valve to install in flanged piping systems. Often referred to as wafer check valves, they provide the simplest most economical way to install check valves in a piping system. The valve body helps position itself while bolts are being installed and tightened. Two gaskets are required instead of the one normally used in a flanged joint. See additional installation guidelines or consult the factory for more information.
These spring loaded check valves are designed to fit between two mating ANSI flanges. The “Spring Housing” designated by the “A” dimension (See: Size & Dimension table below) is designed to be inserted into the upstream pipe, thereby helping to center it in the pipe. Therefore, there must be clearance between the spring housing and the pipe or flange. Generally speaking, the Flange Insert check valve (F1) is designed for standard schedule pipe with Class 150 or 300 flanges; whereas, the (F6) valves are designed for schedule 80 pipe with Class 150, 300 or 600 flanges.
The Flange Insert check valve can also be used as a low-pressure relief valve or vacuum breaker by using the desired spring settings. Many valves in this series can be supplied with B16.34 certification.
Size & Dimension
Nominal Pipe Size
Size Code
ANSI Rating & Material
A
B
C
D*
O.D.
Orifice Diameter.**
1/2
D
150 & 300
600
PTFE & PVC
0.605
N/A***
0.600
1/4
0.29
N/A***
0.27
0.55
0.55
0.68
1-3/8
0.348
3/4
F
150 & 300
600
PTFE & PVC
0.762
0.719
0.720
1/4
0.26
0.24
0.26
0.63
0.62
0.77
1-3/4
0.464
1
H
150 & 300
600
PTFE & PVC
1.000
0.922
0.930
1/4
0.36
0.33
0.36
0.81
0.80
0.81
2
0.593
1-1/4
I
150 & 300
600
PTFE & PVC
1.340
1.234
1.240
1/4
0.44
0.39
0.59
0.88
0.87
0.99
2-1/2
0.890
1-1/2
J
150 & 300
600
PTFE & PVC
1.570
1.490
1.490
1/4
0.44
0.40
0.69
1.04
1.03
1.11
2-7/8
1.135
2
K
150 & 300
600
PTFE & PVC
2.005
1.890
1.890
1/4
0.49
0.43
0.53
1.21
1.21
0.93
3-5/8
1.385
2-1/2
L
150 & 300
600
2.407
2.266
1/4
0.66
0.59
1.45
1.45
4-1/8
1.555
3
M
150 & 300
600
PTFE & PVC
3.006
2.844
2.865
5/16
0.70
0.65
0.73
1.63
1.62
1.62
5
2.025
4
N
150 & 300
600
PTFE & PVC
3.964
3.766
3.766
3/8
1.00
0.96
1.00
1.93
1.93
2.04
6-3/16
2.560
Size 5" and larger are only available in class 150.
Consult the factory if using Schedule 80 pipe.
5
O
150
4.985
1/2
1.07
2.14
7-5/16
3.280
6
P
150
PTFE & PVC
6.003
5.700
3/8
9/16
1.52
1.55
2.22
2.78
8-1/2
3.875
8
Q
150
7.919
1/2
2.27
3.14
10-5/8
5.110
10
R
150
9.958
1/2
2.84
3.58
12-3/4
6.380
12
S
150 Brass Other Metals
11.876
5/8
1/2
3.12
3.25
4.33
4.18
15
7.670
14
T
150 Brass Other Metals
13.062
11/16
1/2
3.18
3.37
4.58
4.45
16-1/4
8.460
16
U
150 Brass Other Metals
14.938
3/4
9/16
3.69
3.88
5.20
5.05
18-1/2
9.650
18
V
150 Brass Other Metals
16.814
7/8
5/8
3.87
4,12
5.80
5.63
21
10.860
20
W
150 Brass Other Metals
18.750
15/16
11/16
3.88
4.13
6.54
6.26
23
12.110
Check "A" dimension for clearance with pipe ID. Generally "A" dimension is designed for use in standard schedule 40 pipe for class 150 & 300 valves (F1). Order class 600 (F6) valves for schedule 80 pipe.
NOTES (DIMENSIONS TABLE)
*Maximum nominal dimension for a fully open valve with no spring.
**Due to molding process, orifice in plastic valves may vary.
***F6 size "D" does not have a spring housing.
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.
WATER FLOWRATE - GPM
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
2-1/2
42
3
89.0
4
144
5
182
6
284
8
535
10
757
12
1200
14
1650
16
2230
18
3010
20
4000
FOR WATER AT 72°F 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
SS, CS & Alloy
BRASS
PTFE
PVC
1/2
1.7 oz.
1.9 oz.
0.5 oz.
0.3 oz.
3/4
2.9 oz.
3.2 oz.
0.8 oz.
0.5 oz.
1
4.2 oz.
4.6 oz
1.1 oz.
0.7 oz.
1-1/4
7.0 oz.
7.4 oz.
1.9 oz.
1.4 oz.
1-2/2
9.5 oz.
9.8 oz.
2.6 oz.
1.7 oz.
2
16.3 oz.
17.3 oz
3.8 oz.
2.6 oz.
2-1/2
1.4 lb.
1.5 lb.
---
---
3
2.3 lb.
2.6 lb.
9.6 oz.
6.1 oz.
4
4.9 lb.
5.3 lb.
1.2 lb.
12.7 oz.
5
8.2 lb.
8.7 lb.
---
---
6
12.3 lb.
13. lb.
1.8 lb.
1.2 lb.
8
24.4 lb.
26.4 lb.
---
---
10
36.3 lb.
44 lb.
---
---
12
51 lb.
58 lb.
---
---
14
74 lb.
93 lb.
---
---
16
105 lb.
130 lb.
---
---
18
157 lb.
201 lb.
---
---
20
207 lb.
262 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.
FIV
1/2" - 1 - 1/2"
PTFE
PVC
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
FIV
2" - 4"
PTFE
PVC
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
FIV
6"
PTFE
PVC
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/2 PSI
316 SS
FIV
1/2" - 1 - 1/2"
316 SS Brass
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
FIV
1/2" - 1 - 1/2"
C. Steel
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1.8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
FIV
2" - 4"
316 SS Brass
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
FIV
2" - 4"
C. Steel
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
FIV
5" - 20"
316 SS Brass
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/2 PSI
316 SS
FIV
5" - 20"
C. Steel
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/2 PSI
316 SS
FIV
1/2" - 20"
Alloy 20
Alloy C-276
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/2 PSI
Alloy C-276
FIV
1/2" - 20"
Alloy 400 MONEL®
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
1/2 PSI
Alloy 400 MONEL®
FIV
1/2" - 20"
Alloy B
AFLAS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene Viton®
