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SS 316 High performance fittings > Valves > Check Valves


  Valves
5-CV Check Valves
Materials of Construction
# Component Stainless Steel
1 Body* SS 316 Stainless Steel
2 O-ring* Viton+
3 Ball Cage* SS 316 Stainless Steel
4 Ball* SS 316 Stainless Steel
5 Spring* SS 316 Stainless Steel
6 O-ring* Viton+
7 Stem* SS 316 Stainless Steel
* Wetted Component
+ Viton Standard; optional materials upon request
 
Designator Cracking1 and Reseal2 Pressures @ 70°F
Nominal Spring Size Cracking Pressure Range Reseal Pressure
1/3 0 - 1 6
1 0 - 3 6
5 3 - 8 2
10 7 - 15 3
15 10 - 20 15
25 20 - 30 17
50 40 - 60 45
Valves that are not acuated for a period of time may crack initially at pressures higher than the above cracking ranges.
1. Cracking pressure - the upstream pressure at which the first indication of flow occurs.
2. Reseal pressure - the upstream pressure at whch there is no indication of flow.
 
 
Check valves
End connection   Orifice Dimensions
L L1 W W1
Type Inlet size Outlet size In. In. In. In. In.
Female NPT 1/8 1/8   0.188 2.33 - 3/4 5/8
1/4 1/4   0.188 2.7 - 3/4 3/4
3/8 3/8   0.282 2.92 - 7/8 7/8
1/2 1/2   0.282 3.33 - 1 1/8 1 1/8
Male NPT to Female NPT 1/8 1/8   0.188 2.33 - 3/4 5/8
1/4 1/4   0.188 2.58 - 3/4 3/4
3/8 3/8   0.282 2.92 - 7/8 7/8
1/2 3/8   0.282 2.92 - 7/8 7/8
1/2 1/2   0.282 3.05 - 7/8 1 1/8
Male NPT 1/8 1/8   0.188 2.33 1.55 3/4 5/8
1/4 1/4   0.188 2.33 1.19 3/4 5/8
3/8 3/8   0.282 2.79 1.65 7/8 3/4
1/2 1/2   0.282 2.92 1.42 7/8 7/8
Female NPT to Male NPT 1/8 1/8   0.188 2.33 - 3/4 5/8
1/4 1/8   0.188 2.46 - 3-4 5/8
1/4 1/4   0.188 2.45 - 3/4 5/8
3/8 3/8   0.282 2.79 - 7/8 3/4
1/2 1/2   0.282 3.20 - 1 1/8 7/8