Chicago Valves 426 316 SS SW Swing Check Valve, 1/4"-3"
4266SW
      Chicago Valves 426 316 SS SW Swing Check Valve, 1/4"-3"
      Chicago Valves 426 316 SS SW Swing Check Valve, 1/4"-3"
      Chicago Valves Series 426 Swing Check Valve | SW

      The Chicago Valves Series 426 is a 316 stainless steel swing check valve designed for reliable automatic backflow prevention in socket weld piping systems.

      Rated at 200 WOG for cold working pressure, with a maximum temperature rating of 350°F (177°C). Features a durable ASTM A351 CF8M 316 stainless steel body and bonnet, 316 stainless steel seat, solid one-piece disc, screwed cover, and PTFE seal for dependable performance in industrial and commercial applications. The valve is manufactured with socket weld ends to ASME B16.11 and tested to API 598 seat and shell standards. Also available with threaded NPT ends.

      Available in sizes from 1/4" to 3".

      Chicago Valves
      $78.67
      $127.92
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      UPS Ground Order before 12:00 on Wednesday and receive it between 6/23/26 and 6/26/26 with UPS Ground

      Delivery Options
      Carrier Description Estimated Delivery
      UPS Ground 5 to 6 days Transit

      6/23/26 - 6/26/26

      UPS 3 bus. days Ships same or next day 3 bus-days Same day/next Order before 10:30 EST (Valve combo + 2)

      6/22/26 - 6/23/26

      UPS 2 bus. days Ships same day 2 bus-days, leaves WH same day if Order up to 10:30 EST

      6/19/26 - 6/22/26

      UPS Next Day - 1 business Day Ships same day except valve/act combo + 2 (Order before 10:30 EST)

      6/18/26 - 6/19/26

      Free Shipping Over $2700.00 Standard Shipping or LTL geater 65 pounds

      6/24/26 - 6/26/26

      LTL Freight over 65 pounds 5-9 Bus. Days

      6/23/26 - 6/30/26

      Carrier: UPS Ground

      Description: 5 to 6 days Transit

      Estimated delivery:
      6/23/26 - 6/26/26

      Carrier: UPS 3 bus. days Ships same or next day

      Description: 3 bus-days Same day/next Order before 10:30 EST (Valve combo + 2)

      Estimated delivery:
      6/22/26 - 6/23/26

      Carrier: UPS 2 bus. days Ships same day

      Description: 2 bus-days, leaves WH same day if Order up to 10:30 EST

      Estimated delivery:
      6/19/26 - 6/22/26

      Carrier: UPS Next Day - 1 business Day

      Description: Ships same day except valve/act combo + 2 (Order before 10:30 EST)

      Estimated delivery:
      6/18/26 - 6/19/26

      Carrier: Free Shipping Over $2700.00

      Description: Standard Shipping or LTL geater 65 pounds

      Estimated delivery:
      6/24/26 - 6/26/26

      Carrier: LTL Freight over 65 pounds

      Description: 5-9 Bus. Days

      Estimated delivery:
      6/23/26 - 6/30/26

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      • The Chicago Valves Series 426 is a compact 316 stainless steel swing check valve. Built with corrosion-resistant ASTM A351 CF8M stainless steel construction, this valve is suitable for commercial and industrial applications where dependable non-return service, clean flow characteristics, and long service life are required. The swing check design allows forward flow to move through the valve while the solid one-piece disc closes automatically when flow stops or reverses.

        The Series 426 is available from 1/4" to 3" and is also available with threaded NPT ends. 

        General Valve Specification
        • Valve Type: Swing Check Valve
        • Body Material: 316 Stainless Steel ASTM A351 CF8M
        • Bonnet Material: 316 Stainless Steel ASTM A351 CF8M
        • Seat Material: 316 Stainless Steel
        • Disc Design: Solid One-Piece Disc
        • Seal Material: PTFE
        • Cover Design: Screwed Cover
        • Operation: Automatic
        • Flow Function: Non-return / backflow prevention
        • Service Type: Unidirectional flow service
        • Pressure Rating:200 WOG (Cold Working Pressure)
        • Maximum Temperature: 350°F (177°C)
        • End Connections: Socket Weld (SW)
        • Optional End Connections: Threaded NPT
        • Country of Origin: Vietnam
        Standards and Compliance
        • API 598, ASME B16.11
        Summary Specifications of Chicago Valves Series 426
        Size Part Number CV  Weight (lbs)
        1/4" 0254266TE 4.2 0.66
        3/8" 0384266TE 5.5 0.77
        1/2" 0504266TE 7 0.73
        3/4" 0754266TE 16 1.12
        1" 1004266TE 30 1.76
        1 1/4" 1254266TE 49 2.54
        1 1/2" 1504266TE 72 3.31
        2" 2004266TE 130 5.03
        2 1/2" 2504266TE 280 8.82
        3" 3004266TE 390 12.79

      • Chicago Valves
        4266SW

        Data sheet

        Valve Type
        Swing Check
        Valve Size
        .5 (1/2") .25 (1/4") .75 ( 3/4") .375 (3/8") 1" 1.5 (1 1/2") 1.25 (1 1/4") 2" 2.5 (2 1/2") 3"
        Valve Temperature Range
        350°F Max (°C 76)
        Valve Body Material
        Stainless Steel ASTM 316
        Valve Body Style
        Screwed Cover Body
        Valve Connection
        SW Ends
        Valve PSI
        200
        Valve Configuration
        2-Way
        Valve Seat
        PTFE
        Warranty
        1 year
        Valve Standards
        API 598 ASME B16.11
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