Upset-type ball valve made of high-pressure nickel-based alloy

The up-mounted ball valve made of high-pressure nickel-based alloy is a top-level industrial valve specially designed to cope with extremely harsh working conditions. Its core is made of high-performance nickel-based alloy materials (such as Inconel 625, Hastelloy C series, Monel, etc.), and it possesses outstanding capabilities in withstanding high temperatures, high pressures, and resisting various strong corrosive media (including high-concentration acids, alkalis, chloride ions, wet hydrogen sulfide, etc.). 

This valve is designed and manufactured strictly in accordance with the highest international standards for the petroleum, natural gas and process industries, including API 6D, API 608, and ASME B16.34. Its materials and manufacturing processes fully comply with anti-sulfuric acid stress corrosion cracking standards such as NACE MR0175/ISO 15156, ensuring long-term safe operation in acidic environments. Its most distinctive top-mounted valve body structure provides unparalleled maintenance convenience. 

The valve design offers full bore and reduced bore options, and the end connections comply with ASME B16.5 (flange), B16.47 (large-diameter flange), or B16.25 (butt-weld end). The structural length follows ASME B16.10. It integrates a series of pipeline-level safety and reliability designs, making it an ideal choice for reliable shut-off and safe isolation on critical pipelines in industries such as chemical, oil and gas extraction and processing, offshore platforms, liquefied natural gas (LNG), and high-corrosive medium transportation.

Revolutionary jacket-style structure and online maintenance capability 

The valve adopts an upper-mounted body design, which is its core advantage. This means that when the valve needs maintenance, it does not need to be cut off from the pipeline. Instead, after isolating the pipeline under pressure, by simply removing the components at the top of the valve cover, all the internal parts (valve internals) including the valve seat, ball, and valve stem can be taken out online for repair or replacement. This significantly reduces the system downtime, avoids the high costs and safety risks of pipeline cutting and re-welding, and is particularly suitable for continuous process units and long-distance pipelines that cannot be easily shut down. 

2. Top-grade corrosion-resistant materials and long-lasting hard sealing system 

The main body and internal components of the valve are made of high-performance nickel-based alloys. These materials maintain high strength even at high temperatures and have extremely strong resistance to pitting, crevice corrosion and stress corrosion cracking. They are particularly suitable for handling extreme media such as wet hydrogen sulfide, seawater, and strong acids. Combined with the design of hard-sealed valve seats (with the sealing surfaces often being clad with Stellite alloys or undergoing special hardening treatment), a metal-to-metal sealing pair with wear resistance, erosion resistance and high-temperature resistance is formed. Under harsh working conditions, it can ensure a long service life and reliable zero-leakage sealing, far exceeding the applicable boundaries of ordinary soft-sealed valves. 

3. Comprehensive pipeline-level security and protection design 

Safety design runs throughout. The valve has a fire safety structure (in accordance with API 607/6FA), which can provide temporary sealing through the metal auxiliary seal in case of a fire. The valve stem anti-sway-out and anti-static design prevent the valve stem from flying out under high pressure through the mechanical structure, and discharge static electricity through the conductive spring. The automatic pressure relief function of the middle chamber can prevent abnormal pressure rise in the valve chamber due to temperature increase. The emergency sealing grease injection system can inject special sealing grease to establish an emergency seal when the main seal is slightly damaged. The dust-proof design of the valve seat can effectively prevent solid particles from invading the sealing surface. 

4. Excellent comprehensive performance in anti-sulfur and corrosion resistance 

Designed specifically for corrosive environments, its materials and manufacturing processes strictly follow the NACE MR0175/MR0103 (ISO 15156) standards. Special controls and verifications have been carried out for hydrogen-induced cracking (HIC) and sulfide stress corrosion cracking (SSC) in hydrogen-containing environments, ensuring excellent corrosion resistance and long-term structural integrity in high-risk environments such as acid-containing oil and gas fields and refining desulfurization facilities. 

5. Low-torque operation and flexible advanced function configuration 

The optimized flow channel and bearing design ensure low-torque operation, making the valve easy to open and close and compatible with smaller actuators. The valve offers multiple advanced cavity discharge configuration options, including DBB (double isolation and discharge), DIB-1 (double isolation and single discharge), and DIB-2 (double isolation and double discharge) structures. Users can choose according to the highest requirements of process safety isolation levels to achieve safe detection and discharge of cavity pressure, providing extremely high operational safety and flexibility for complex processes.