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 low-temperature gate valve is a type of equipment used for full opening and full closing operations. The opening and closing element of the low-temperature gate valve is a gate plate. The movement direction of the gate plate is perpendicular to the flow direction of the fluid. The gate valve can only be operated in full opening and full closing positions, and cannot be used for regulation or throttling. The gate plate has two sealing surfaces. The most commonly used type of gate valve has two sealing surfaces forming a wedge shape, and the wedge angle varies with the parameters.
RAYS' rising stem ball valve is designed to operate without friction between the ball and the seat during opening and to achieve zero leakage when closed. This makes it well-suited for demanding conditions. The valve is made entirely of metal and is fire-resistant, capable of functioning in extreme temperatures ranging from -196°C (320.8°F) to 538°C (1000.4°F). It can handle media with particulates like sand and short fibers, and meets NACE standards for corrosion resistance, ensuring it can resist sulfide stress cracking in harsh environments. The valve also features a self-cleaning mechanism. When the ball is tilted away from the seat, the fluid flows 360° around the ball's sealing surface, effectively removing any debris. This prevents damage from high-speed fluid flows and keeps the sealing area clean. The rising stem ball valve is ideal for various applications including exhaust, fluid transfer, pipeline isolation, bypass, product segmentation, and emergency shutdowns, particularly where high switching frequencies and zero leakage in high temperatures are required.
Designed specifically for deep-cold media such as LNG and liquid oxygen, this valve features an austenitic stainless steel body that undergoes special deep-cold treatment to ensure reliable sealing and operational performance under extreme conditions of -196℃. The valve stem adopts an extended neck design and is equipped with a vacuum insulation structure, effectively blocking the transmission of cold energy. The valve can be equipped with either a flat seal or a conical seal structure, allowing for selection based on different pressure ratings, and is suitable for precise flow control in liquefied natural gas storage and transportation, air separation equipment, and low-temperature chemical systems.