Control Valve Failure Analysis and Solutions

Control Valve Sales Techniques

ChuanKai Valves is actively responding to the new regulations, and the process of obtaining the type-test certification is nearing completion.

The new <Type Test Rules for Pressure Piping Components> has been released, paving the way for new industry advancements.

Commemorative event celebrating the 80th Anniversary of the Victory in the Chinese People's War of Resistance Against Japanese Aggression and the World Anti-Fascist War

Notice on Launching Free On-Site Fault Diagnosis Services for Control Valves

Introduction to the National Standard for Valves

National standard for valves: GB5135.6-2018 Automatic Sprinkler Fire Suppression Systems

The Structure and Features of All-Welded Ball Valves

Since the valve seat is composed of a tungsten carbide Teflon sealing ring and a disc spring, it exhibits excellent adaptability to changes in pressure and temperature, ensuring no leakage or slipping occurs within the specified pressure and temperature ranges.

Key points for installing and the working principle of large-caliber gate valves

Large-diameter gate valves are suitable for small-diameter pipelines rated from Class 150 to 2500, with operating temperatures ranging from -29°C to 425°C (for carbon steel) or -29°C to 500°C (for stainless steel). These valves are designed to either shut off or fully open the flow of media within the pipeline. By selecting different materials, they can handle a wide variety of fluids, including water, steam, oils, nitric acid, acetic acid, oxidizing media, urea, and more. They are particularly commonly used in petroleum pipelines.

How an Ammonia Globe Valve Works and How to Use It

The high-pressure chamber of the ammonia valve is connected to the cylinder, while the low-pressure chamber serves as the gas outlet, leading directly to the application system. The high-pressure gauge indicates the pressure of the gas stored inside the cylinder. Meanwhile, the outlet pressure on the low-pressure gauge can be precisely controlled using the adjusting screw.

Installation Method for Lift-Type Check Valves

The function of a check valve is to allow the media to flow in only one direction, while preventing backflow. Typically, these valves operate automatically: when fluid flows in the forward direction, the pressure pushes the valve disc open; however, if the fluid tries to flow backward, the combined force of the fluid pressure and the disc’s own weight closes the disc against the valve seat, effectively stopping the flow. Among the types of check valves, the internal-threaded check valve and the butterfly check valve fall into this category. Specifically, they include two subtypes: the swing check valve and the lift check valve. The swing check valve features a hinged mechanism and a door-like disc that rests freely on an angled valve seat surface. To ensure the disc always lands precisely at the right position on the seat, the design incorporates a hinge system that provides ample clearance for the disc to swing open and closed—allowing full, even contact with the seat. The disc itself can be made entirely of metal, or it may have a resilient lining—such as leather, rubber, or even a synthetic coating—depending on the specific performance requirements of the application. When fully open, the swing check valve offers minimal resistance to fluid flow, resulting in a relatively low pressure drop across the valve. In contrast, the lift check valve has a disc that sits directly on the sealing surface of the valve body’s seat. Like a globe valve, this type of check valve allows the disc to move freely up and down. When fluid flows in the forward direction, the pressure lifts the disc off the seat, permitting flow. Conversely, if backflow occurs, the disc returns to its seated position, blocking the reverse flow. Depending on the operating conditions, the disc can either be constructed entirely of metal or fitted with a rubber gasket or rubber ring mounted on a disc holder. Similar to globe valves, the flow path through a lift check valve is narrower, which leads to a slightly higher pressure drop compared to the swing check valve. Additionally, the swing check valve imposes far less restriction on flow, making it more efficient for applications requiring unrestricted passage.

Do you already know everything about ball valves?

A ball valve is a type of valve in which the closing member (the ball) is driven by a stem and rotates around the valve's central axis.

Technological innovation drives development—let's strive to be the industry leader.

In the company's production workshop, nearly 100 machine tools are operating at full capacity as the company has fully resumed work and production. Employees are diligently fulfilling their responsibilities, working together in harmony to help the enterprise achieve a strong start for the year.

Seize the opportunities of the times and rise with the momentum.

Today's world is undergoing a transformation of unprecedented magnitude in a century, as a new wave of scientific and technological revolution—and associated industrial changes—accelerates at an astonishing pace. Innovation has become the key variable reshaping global and regional competitive dynamics. Only by continuously strengthening scientific and technological innovation can we unlock powerful momentum for high-quality economic growth.

Industrial ultra-low-temperature valves no longer rely on others.

Tech Daily News (Reporter Liu Zhiwei) – On January 17, the Petrochemical Equipment Professional Committee of the China Petroleum and Petrochemical Engineering Research Association awarded Hubei Taihe Petrochemical Equipment Co., Ltd. the plaque for the "Industrial Ultra-Low Temperature Valve Technology Center." Notably, this marks the first industrial ultra-low temperature valve technology center established within China's petroleum and petrochemical research institutions. At the plaque-awarding ceremony, Ding Wu, Secretary-General of the association, highlighted that Hubei Taihe has successfully broken foreign monopolies and is now at the forefront of the nation in developing cutting-edge technologies for manufacturing industrial ultra-low temperature valves. Located in Zigui County, within the Three Gorges Reservoir area, Hubei Taihe specializes in producing high-end, mid-range valves and pipe fittings—including deep-cold and high-temperature, high-pressure models.

What is mechanical manufacturing? The nature of the mechanical manufacturing industry.

The machinery manufacturing industry comprises seven detailed sectoral divisions, three of which produce machinery tailored for specific industries—known as specialized machinery: agricultural, construction, and mining machinery manufacturing; industrial machinery manufacturing; and machinery manufacturing for commercial and service sectors.