The main components are forged. There are three types of forged steel check valve cavity seals: bolted bonnet, welded bonnet, and cavity
pressure self-tightening seal structure.
A bolted bonnet means that the valve body and bonnet are connected with bolts and nuts and sealed with spiral wound gaskets (made of
stainless steel wire clips and flexible graphite). Metal rings can also be used for connection when customers have special requirements.
Welded bonnet means that the valve body and bonnet are connected with threads and fully welded. The fully welded connection can also be used when customers have special requirements.
The 900Ib, 15001b, and 2500b cavities can also adopt a pressure self-tightening seal structure. The sealing performance increases with the
increase of internal pressure and has high reliability.
When the medium flows downstream, the check valve disc is opened by the thrust of the medium. When the medium stops flowing, the
disc falls.
On the valve seat by its weight and the pressure of the medium backflow, which plays a role in preventing the medium from flowing back.
There is no external leakage point as a whole, eliminating the possibility of valve leakage.
The sealing pair is advanced and reasonable. The valve disc and valve seat sealing surface are made of alloy steel or hard alloy by butt
welding. They are resistant to high temperatures, corrosion, and abrasion and have a long service life.
Under high pressure, the valve disc of the lifting check valve can be spherical.
Various piping flange standards and flange sealing forms can be used to meet various engineering needs and user requirements.
Main material: carbon steel, stainless steel, alloy steel
Nominal diameter: NPS1/4″~NPS3″ DN6~DN80
Pressure range: CL150~CL2500 PN10 ~ PN420
Working temperature: -196°C ~ +600°C
Application range: tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electricity, shipbuilding, metallurgy, energy system, etc.
◎ Design standard: API 602, ASME B16.34
◎ Structural length: Socket welding/threaded end structural length according to factory standard
◎ Flanged end ASME B16.10, GB/T 12221
◎ Connection standard: ASME B16.11, ASME B1.20.1, ASME B16.5, ASME B16.25
◎ Wall thickness standard: API 602
◎ Pressure test: API 602/API 598
◎ Pressure and temperature rating: ASME B16.34
Mainly suitable for cutting off or connecting pipeline media in various systems of thermal power plants. Applicable media: non corrosive media such as water and steam. The characteristics of forged steel valves compared to other valve products are high temperature and high pressure, unique self sealing design, and the higher the pressure, the more reliable the seal. Due to its unique performance, technical characteristics, and working conditions, the product has also developed unique features that cannot be replaced by other products.
The axial-flow check valve has a unique axial flow design, and its spool is aligned with the flow direction, significantly reducing the resistance loss when the fluid passes through. The spool is driven by spring or fluid pressure for quick opening and closing. When the fluid is flowing forward, the spool is pushed open and the fluid passes smoothly. When the fluid flows in reverse, the spool is quickly closed, effectively preventing backflow, and ensuring the stability and safety of the system operation.
Designed specifically for industrial ventilation and gas transportation systems, it features a high-strength carbon steel or stainless steel valve body, equipped with a low-torque sealing structure, enabling efficient regulation of large flow of gas media. The optimized butterfly plate design is combined with wear-resistant sealing rings, ensuring reliable performance under harsh conditions such as high temperatures and dust. It is suitable for ventilation and dust removal systems in industries such as power plants, metallurgy, and chemical engineering.