Check Valves Selection Guide


Select from model number column to see data sheet

Cv Line Size Model Number Pressure Cracking Pressure Seals1 Body, End
Poppet Spring		 End Connections
P=Pipe
T=Tube
3505 1/4"
3/8″
1/2″
3/4″
1″
1 1/2″		 2.5
3.5
6.0
10.0
15.0
35.0		 0-3000
0-6000		 1 psi Viton 316 Stainless Steel (Std.) P,T
3505-3050 1/4″
3/8″
1/2″
3/4″
1″
1 1/2″		 2.5
3.5
6.0
10.0
15.0
35.0		 0-3000
0-6000		 8 psi Teflon 316 Stainless Steel (Std.) P,T
3505-2025 1/4″
3/8″
1/2″
3/4″
1″
1 1/2″		 1.3
1.5
3.0
4.7
5.5
15.0		 0-3000
0-6000		 1 psi Chemraz 316 Stainless Steel (Std.) P,T

1 Other materials available

For more selection of check valves, please visit Circle Seal's website.