The H42W flange vertical check valve is an automatic valve for preventing backflow of media and is designed for vertical pipes. Its structure is lifting type (vertical type), and it can be opened and closed by moving up and down the valve flap in the valve body along the vertical axis. When the medium flows forward, the valve disc is pushed open; when the medium stops or reverses, the valve disc closes quickly under the action of self-weight and reverse pressure, effectively blocking backflow and protecting the safety of the pipeline system.
Model analysis
H: Represents Check Valve.
4: Flange connection method.
2: Vertical lifting structure (vertical installation).
W: The sealing surface material is stainless steel (such as surfacing cemented carbide or stainless steel for valve discs and seats)
Core features
Vertical installation design
Specially optimized for vertical pipelines, the valve disc relies on its own weight to close quickly, respond sensitively, and avoid water hammer impact.
Note: It cannot be installed horizontally, otherwise it may cause the seal to fail or the valve cannot close properly.
Excellent sealing performance
The sealing surface is surfacing with stainless steel or cemented carbide, which is resistant to wear and corrosion, and is suitable for high temperature and high pressure conditions.
The valve disc is closely fitted with the valve seat, and the leakage volume meets the requirements of the national standard (GB) or American standard (API).
Low flow resistance structure
The runner is designed to be straight through, with low resistance when the medium passes through, reducing energy losses, and is suitable for large flow systems.
Strong durability
The valve body has a variety of materials (cast steel WCB, stainless steel 304/316, etc.), adapting to different media (water, steam, oil, weakly corrosive fluid).
It has a wide temperature range (-29℃~425℃), and its pressure level covers PN16~PN40 (or Class150~Class300).
Convenient maintenance
The valve cover is bolted for easy disassembly, and the internal parts can be replaced quickly, reducing maintenance costs.
Technical parameters
Project Parameter Description
Nominal diameter DN15~DN600 (supports customization)
Nominal pressure PN10~PN40 / Class150~Class300
Applicable temperature -29℃ ~ +425℃ (adjust according to the material)
Valve body material: cast steel (WCB), stainless steel (CF8/CF8M), etc.
Sealing surface material stainless steel + cemented carbide welding
Connection standards GB, HG, ANSI, DIN, JIS and other flange standards
Application areas
Petrochemical industry: Anti-countercurrent of oil pipelines and reaction devices.
Electric power industry: boiler water supply system, steam pipeline.
Water treatment: pump outlet, high-rise building water supply system.
Industrial pipelines: compressed air and gas conveying pipelines.
Selection suggestions
Determine the medium type (corrosiveness, particulate content), temperature and pressure.
Make sure the installation direction must be vertically upward to ensure that the valve is opened and closed normally.
Select flange type according to pipeline standards (such as HG/T20592 American standard flange or GB national standard flange).
If you need to customize in special working conditions (such as ultra-low temperature, high corrosion), it is recommended to contact the manufacturer to provide material upgrade solutions (such as duplex stainless steel, Monel alloy).
