Circle Seal Controls


Circle Seal provides world class technology as a global leader for fluid control solutions for check valves, relief valves and more!  Circle Seal Controls designs and manufactures to customers' ever evolving requirements and specifications.  Some of their valve lines include the 200 Series Check Valves500 Series Relief Valves and 5100 Series Relief Valves.

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Circle Seal
  1. Circle Seal Relief Valve Naval Brass ASME 1 in MNPT 448 PSI

    Circle Seal M5159N-8ML-448ASME Relief Valve ASME 1 in MNPT - 448 PSI Cracking Pressure - Naval Brass

    List Price: $494.60

    $593.52

    Circle Seal M5159N-8ML-448ASME Relief Valve Naval Brass ASME 1 in MNPT 448 PSI with Buna N Seat.

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  2. Circle Seal Check Valve 3/4 inch Male NPT - 4 PSI Cracking Pressure - Brass 2233B-6MM

    Circle Seal 2233B-6MM Check Valve 3/4 inch Male NPT - 4 PSI Cracking Pressure - Brass

    List Price: $55.25

    $66.30

    Circle Seal 2233B-6MM Check Valve 3/4 inch Male NPT - 4 PSI Cracking Pressure - Brass with Neoprene O-Ring.

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  3. Circle Seal Check Valve 1/4 inch Female NPT - 0.5 to 1 PSIG Cracking Pressure - Brass 232B-2PP

    Circle Seal 232B-2PP Check Valve 1/4 inch Female NPT - 0.5 to 1 PSIG Cracking Pressure - Brass

    List Price: $54.10

    $64.92

    Circle Seal 232B-2PP Female Pipe 1/4 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


  4. Circle Seal Check Valve Viton-A Brass 1/4 in. 15 CP 232B-2PP-.15

    Circle Seal 232B-2PP-.15 Check Valve 1/4 inch Female NPT - .15 PSIG Cracking Pressure - Brass

    List Price: $56.60

    $67.92

    Circle Seal 232B-2PP-.15 Female Pipe 1/4 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


  5. Circle Seal 200 Series Check Valve 1/2 inch FNPT Brass 232B-4PP

    Circle Seal 232B-4PP Check Valve 1/4 inch Female NPT - 0.5 to 1 PSIG Cracking Pressure - Brass

    List Price: $90.95

    $109.14

    Circle Seal 232B-4PP Female Pipe 1/4 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


  6. Circle Seal 200 Series Check Valve 232B-6PP

    Circle Seal 232B-6PP Check Valve 3/4 inch Female NPT - 0.5 to 1 PSIG Cracking Pressure - Brass

    List Price: $117.75

    $141.30

    Circle Seal 232B-6PP Female Pipe 3/4 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


  7. Circle Seal 200 Series Check Valve 1/4 inch FNPT Brass 233B-2PP

    Circle Seal 233B-2PP Check Valve 1/4 inch Female NPT - 2 to 4 PSIG Cracking Pressure - Brass

    List Price: $54.10

    $64.92

    Circle Seal 233B-2PP Female Pipe 1/4 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

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  8. Circle Seal 200 Series Female Pipe Check Valve - 1/2 inch - Brass - Neoprene O-Ring - Crack Pressure 2-4 psig 233B-4PP

    Circle Seal 233B-4PP Check Valve 1/2 inch Female NPT - 2 to 4 PSIG Cracking Pressure - Brass

    List Price: $90.95

    $109.14

    Circle Seal 233B-4PP Female Pipe 1/2 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


  9. Circle Seal Check Valve 1/4 inch Female NPT - 2 to 4 PSIG Cracking Pressure - Brass 249B-2PP

    Circle Seal 249B-2PP Check Valve 1/4 inch Female NPT - 2 to 4 PSIG Cracking Pressure - Brass

    List Price: $54.10

    $64.92

    Circle Seal 249B-2PP Female Pipe 1/4 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


  10. Circle Seal Check Valve 3/8 inch Female NPT - 2 to 4 PSIG Cracking Pressure - Brass 249B-3PP

    Circle Seal 249B-3PP Check Valve 3/8 inch Female NPT - 2 to 4 PSIG Cracking Pressure - Brass

    List Price: $64.80

    $77.76

    Circle Seal 249B-3PP Female Pipe 3/8 inch Check Valves is absolutely bubble tight in leakage tests. No Leakage whatsoever at any Differential Pressure. This check valve has a Quick Opening - Positive Closing, even at extremely low pressure differential. p> Learn More

     


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