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  6. Backflow prevention valve / Check valve CV series [2D/3D CAD]

Backflow prevention valve / Check valve CV series [2D/3D CAD]

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CV

last updated:Feb 27, 2026

正英製作所 本社、東京支店、名古屋営業所、大阪支店、広島支店、九州支店
正英製作所 本社、東京支店、名古屋営業所、大阪支店、広島支店、九州支店
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A backflow prevention valve that can be used in gas piping for combustion equipment such as city gas and LPG. It operates at low differential pressure and prevents backflow of combustion air.

【Purpose】 Prevention of backflow in gas lines 【Features】 It operates even at low differential pressure due to its structure with low pressure loss. Available for pipe sizes from 15A to 100A. Installation can be done in the "horizontal direction" and in the "vertical direction with flow from bottom to top." 【Gas Used】 - City gas (13A) - Propane (LPG) - Please inquire for other gases. *Please refrain from using with air or oxygen piping as it contains NBR. CAD drawings are also available for download. 2D (DXF), 3D (STEP)

    valveHeating deviceIndustrial Furnace
CV.png

Backflow prevention valve / Check valve CV series [2D/3D CAD]

CV.png
CV.png 2.png 3.png
  • Check valve
  • Special site - Product/service details - https://pr.mono.ipros.com/shoei-mfg/product/

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basic information

【Size Lineup】 CV-15 (15A) CV-20 (20A) CV-25 (25A) CV-40 (40A) CV-50 (50A) CV-80 (80A) CV-100 (100A) 【Gas Used】 - City Gas (13A) - Propane (LPG) - Please inquire for others. *Please refrain from using with air or oxygen piping as NBR is used.

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【Purpose】 Gas line backflow prevention, check valve 【Used gases】 - City gas (13A) - Propane (LPG) - Nitrogen gas *Please refrain from using with air or oxygen piping as it contains NBR.

catalog(1)

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[Catalog] Check Valve (Non-Return Valve) CV Series

[Catalog] Check Valve (Non-Return Valve) CV Series

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CAD data(14)

Model number overview File
CV-15 Check valve (non-return valve)
  • 2D dxf ( 964KB)
CV-15 Check valve (non-return valve)
  • 3D stp ( 883KB)
CV-20 Check valve (non-return valve)
  • 2D dxf ( 2MB)
CV-20 Check valve (non-return valve)
  • 3D stp ( 922KB)
CV-25 Check valve (non-return valve)
  • 2D dxf ( 749KB)
CV-25 Check valve (non-return valve)
  • 3D stp ( 797KB)
CV-40 Check valve (non-return valve)
  • 2D dxf ( 789KB)
CV-40 Check valve (non-return valve)
  • 3D stp ( 2MB)
CV-50 Check valve (non-return valve)
  • 2D dxf ( 781KB)
CV-50 Check valve (non-return valve)
  • 3D stp ( 718KB)
CV-80 Check valve (non-return valve)
  • 2D dxf ( 876KB)
CV-80 Check valve (non-return valve)
  • 3D stp ( 909KB)
CV-100 Check valve (non-return valve)
  • 2D dxf ( 929KB)
CV-100 Check valve (non-return valve)
  • 3D stp ( 2MB)

Company information

正英製作所

正英製作所 本社、東京支店、名古屋営業所、大阪支店、広島支店、九州支店

Industrial Machinery

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At Shoei Manufacturing Co., Ltd., we are taking on the challenge of "hydrogen combustion"! In addition, we offer various industrial furnaces such as "design and manufacturing of various original burners," "safety combustion system piping equipment," "food heating," "smoke and odor removal devices," "painting-related and heat treatment" equipment, as well as aluminum industrial furnaces like "melting furnaces and holding furnaces." Please also consult us about our self-developed energy-saving burners and "hybrid heating" that utilizes the unique characteristics of both "gas" and "electricity."

Product/Service List (84)

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