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
RAYS Side Entry Trunnion mounted ball valves are quarter-turn valves used to stop the flow of medium in pipelines. RAYS is the real API 6D valve manufacturer for the Trunnion mounted ball valve. These valves feature a round or spherical disk in the center that rotates to start or stop the flow. This disk is called a ball and it features a hollow center. Ball valves are extremely versatile and are commonly used in industrial applications where tight shut-off is required. Side Entry Trunnion mounted ball valves feature additional support for the ball. This support is in the shape of a shaft and is called a trunnion. The trunnion absorbs any added pressure from the flow, reducing stress on the ball and seats of the valve. Trunnion mounted ball valves are used in high-pressure, large scale applications where low operating torque is required.
The structure is simple & compact with: smooth flow passages, high accuracy in flow characteris- tic curves, stable & reliable, economically practical, and easy to maintain. Based on a conventional type, it is designed and developed through modular extension which is capable of producing special structures such as: the C7 series angle type single-seat valve, bellows seal single-seat valve, and insulated jacket type single-seat valve for user selection.
The hard-sealed butterfly valve is a newly developed long-life, energy-saving butterfly valve by our company. It consists of main components such as the valve body, butterfly disc, sealing ring, and transmission mechanism. Its structure is designed based on the two-dimensional or three-dimensional eccentric principle and features a new manufacturing process that accommodates both elastic and multi-layer hard-soft seals. This design reduces torque during operation, achieving energy efficiency and labor-saving benefits. At the same time, it ensures the valve's overall reliability in corrosion resistance, high temperature tolerance, and wear resistance. Common types of hard-sealed butterfly valves include wafer type, lug type, and flanged type butterfly valves.