The 3S Series Sanitary Check Valve is an insert style, spring-loaded check valve designed for use in sanitary applications where 3-A certification, a minimum surface finish, or clean-in-place (CIP) is required.
3-A approved for use as a check valve or vacuum breaker, the 3S Series installs between new or existing sanitary ferrules, fittings, or tubing1, and includes 2 outer o-rings to provide a leak tight seal.
Use with liquid, gas, or steam
Can be installed horizontal, vertical up, or vertical down. No special option required
Standard 32 Ra internal finish with options 15 Ra finish available by request
The insert design requires no additional space by utilizing existing components, making it the ideal choice when retrofitting into existing systems
The open design allows the valve to be used in clean-in-place (CIP) applications
3-A (58-02) approved for use as a check valve or vacuum breaker
Constructed of 316 Stainless with 3-A or USP Class VI elastomers
Size & Dimension
Line Size
Size Code
A
B
C*
D**
E
F***
G
Orifice Diameter
1
H
1
1/16
1.72
2.16
0.38
0.870
1.47
0.476
1-1/2
J
1-1/2
1/16
2.53
3.47
0.38
1.370
2.18
0.890
2
k
2
1/16
3.03
4.13
0.47
1.870
2.59
1.135
2-1/2
L
2-1/2
1/16
3.28
4.59
0.47
2.370
2.85
1.59
3
M
3
1/16
4.59
5.53
0.47
2.870
3.36
2.150
4
N
4
1/16
4.75
6.69
0.47
3.834
4.02
2.699
NOTES (DIMENSIONS TABLE)*Maximum nominal dimension for valve closed.
**Maximum nominal dimension for a fully open valve.
***Valves are designed to function with fittings having these internal diameters. (±0.005)
Consult factory for more information.
Available Materials
Body Material Options
316/316L Stainless Steel
Seat Material Options
3-A EPDM, 3-A Silicone
Spring Material Options
316 Stainless Steel
HASTELLOY® C-276
Pressure Temperature Table
Note: 30 PSI is the maximum recommended pressure drop.
Body Material
Line Size
Non-Shock Pressure- Temperature Rating
316 Stainless Steel (SS)
1"
1000 PSIG @ 100°F
1-1/2" - 4"
725 PSIG @ 100°F
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
5.2
1-1/2
16.1
2
27.2
2-1/2
49.4
3
74.9
4
120.0
FOR WATER AT 72°F
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
316/316 LSS
1
3SH
2.3 oz.
1-1/2
3SJ
6.2 oz.
2
3SK
13.9 oz.
2-1/2
3SL
1.5 lb.
3
3SM
1.9 lb.
4
3SN
3.9 lb.
Seat & Cracking Pressure Options
Valve Style
Size Range
Body Materials
Other Options
Allowable Seat Materials
Standard Cracking Pressures
Other Options
More Info.
Standard Spring Material
More Info.
3S
1" - 4"
316 SL/316 SS
3-A AFLAS®
3-A EPDM
3-A Kalrez®
3-A Silicone
3-A Viton®
3-A/USP Class VI AFLAS®
3-A/USP Class VI EPDM
3-A/USP Class VI Kalrez®
3-A/USP Class VI Silicone
3-A/USP Class VI Viton®
