Backflow prevention valve / Check valve CV series [2D/3D CAD]
CV
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)
Inquire About This Product
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.
Price range
Delivery Time
Applications/Examples of results
【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）
Download All Catalogs![[Catalog] Check Valve (Non-Return Valve) CV Series](https://image.mono.ipros.com/public/catalog/image/01/9c6/704559/IPROS17113356539166000350.jpeg?w=120&h=170)
CAD data（14）
| Model number | overview | File |
|---|---|---|
| CV-15 | Check valve (non-return valve) |
|
| CV-15 | Check valve (non-return valve) |
|
| CV-20 | Check valve (non-return valve) |
|
| CV-20 | Check valve (non-return valve) |
|
| CV-25 | Check valve (non-return valve) |
|
| CV-25 | Check valve (non-return valve) |
|
| CV-40 | Check valve (non-return valve) |
|
| CV-40 | Check valve (non-return valve) |
|
| CV-50 | Check valve (non-return valve) |
|
| CV-50 | Check valve (non-return valve) |
|
| CV-80 | Check valve (non-return valve) |
|
| CV-80 | Check valve (non-return valve) |
|
| CV-100 | Check valve (non-return valve) |
|
| CV-100 | Check valve (non-return valve) |
|
Company information
Since its establishment in 1959, Seiei Manufacturing Co., Ltd. has supplied gas burners and industrial furnaces to various fields. Leveraging the "combustion technology" and "thermal utilization technology" developed during this time, we are working on the development of "hydrogen and ammonia combustion technology" and "low-carbon thermal equipment." At the "Thermal Technology Research Institute," we can conduct combustion tests of hydrogen gas burners, as well as tests for painting drying and aluminum melting using hydrogen combustion. Additionally, we can perform various tests to solve issues related to thermal equipment. As professionals in thermal equipment, we are committed to contributing to the realization of carbon-neutral manufacturing.
![Single End Radiant Tube Burner [TRF Burner]](https://image.mono.ipros.com/public/product/image/c08/2000793597/IPROS40624651388633756578.png?w=280&h=280)
![Inclined immersion type electric heater holding furnace [oxide reduction type]](https://image.mono.ipros.com/public/product/image/c7e/2000804160/IPROS67190141477188481135.jpeg?w=280&h=280)
![Butterfly Valve BV Series [2D/3D CAD]](https://image.mono.ipros.com/public/product/image/7a0/2000815776/IPROS65074472961613162442.jpeg?w=280&h=280)
![Challenging Decarbonization Technologies! Introduction to the Thermal Technology Research Institute [Latest Information for 2026!]](https://image.mono.ipros.com/public/product/image/3d5/2000834196/IPROS99631596500298700026.jpeg?w=280&h=280)