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
The DBB Ball Valve (Twin Ball) requires two in-line isolation valves and a bleed valve, used to drain or vent trapped fluid between the two closure elements in order to safely isolate safely the downstream pipe. This feature can be achieved with one single valves c/w a bleed port between the obturators.
RAYS pigvalve is a high-performance ball valve designed for severe industrial environments, featuring multifunctionality aimed at optimizing pipeline cleaning and maintenance. This valve facilitates the movement of pipeline pigs to effectively remove scale, deposits, and other impurities, maintaining cleanliness and flow efficiency in pipelines.
The quality of forged steel parts is higher than that of cast steel parts, and they can withstand large impact forces. Their plasticity, toughness, and other mechanical properties are higher than those of cast steel parts. The diameter of forged steel stop valves is generally not more than DN80, and most of them are reduced-diameter designs. Compared with cast steel stop valves of the same diameter, the flow rate is slightly lower, but the pressure and temperature range they can withstand are higher than those of cast steel valves, and their sealing performance is much better than that of cast steel stop valves, and their service life is longer. Like other stop valves, they are subject to the restrictions of the flow direction of the medium. Forged steel stop valves can be divided into straight-through stop valves (type stop valves) and direct-flow stop valves (Y-type stop valves) according to installation positions.