News-Wenzhou Chengtong Fluid Equipment Co., Ltd

2025-06-05

Key points for installation and use of diaphragm valves

Diaphragm valve is a type of valve that uses a diaphragm as an opening and closing component to control fluid flow. Its installation and use are crucial for ensuring the normal operation of the valve and extending its service life. The following are the key points for installing and using diaphragm valves: 1、 Installation points 1. Pre installation inspection: Confirm that the model, specifications, and design requirements of the diaphragm valve are consistent. Check the appearance of the valve to ensure that there is no damage or rust, and that all components are intact and undamaged. Clean the debris, dust, etc. inside and outside the valve to ensure cleanliness.

2025-06-05

What is the difference between a half pack ball valve and a full pack ball valve?

The main difference between semi packaged ball valves and fully packaged ball valves is the degree to which the ball valve sealing gasket (ball seat) covers the ball, as follows: 1. Half pack ball valve: • Coverage level: The ball seat can only partially cover the sphere, usually only covering both sides of the sphere. • Characteristics: Due to limited coverage, there may be residues and dead corners in the valve chamber, resulting in material retention. Applicability: Strictly speaking, it cannot be called a sanitary valve and is suitable for situations where hygiene requirements are not high, such as the transportation of water and gas. Limitations: The use of half pack ball valves is limited in applications that require high cleanliness and no retention.

2025-06-05

What is the difference between 304, 304L, 316, and 316L?

There are differences in chemical composition, mechanical properties, corrosion resistance, application scenarios, and prices among 304, 304L, 316, and 316L stainless steels. The following is a specific analysis: chemical composition 304: Carbon content ≤ 0.08% (typical value about 0.06-0.08%), mainly containing elements such as chromium (17-19%) and nickel (8-11%). 304L: Carbon content ≤ 0.03%, other element content similar to 304, belonging to ultra-low carbon stainless steel. 316: Contains 17-20% chromium, 11-14% nickel, and 2-3% molybdenum, with a carbon content of around 0.08%. 316L: Contains 16-18% chromium, 10-14% nickel, and 2-3% molybdenum, with a carbon content below 0.03%.

2025-06-05

Working principle and main characteristics of sanitary grade three piece butterfly valve

The working principle of the sanitary grade three piece butterfly valve is based on the rotational motion of the butterfly plate to control the opening, closing, and adjustment of the fluid channel. The core component is a circular butterfly plate, which is installed in the diameter direction of the pipeline and rotates with the rotation of the valve stem. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, with a rotation angle usually between 0 ° and 90 °. When the butterfly plate rotates to 90 °, the valve is fully open, allowing fluid to pass freely; When the butterfly plate is perpendicular to the direction of fluid flow (i.e. 0 ° position), the valve closes, preventing fluid from passing through. The butterfly plate can also adjust the fluid flow rate at the middle position.

2024-09-30

Installation environment and precautions for vacuum ball valves

The installation environment and precautions for vacuum ball valves are crucial for their normal operation and service life. The following are environmental factors and precautions to consider when installing vacuum ball valves: 1、 Installation environment requirements temperature range Vacuum ball valves are typically suitable for standard environments ranging from -25 ℃ to+120 ℃. If the temperature of the working medium exceeds this range, high-temperature resistant seals (up to+230 ℃) should be selected to avoid seal failure. Pressure Range

2024-09-30

Application fields of sanitary grade pipe fittings

Sanitary grade pipe fittings are widely used in multiple fields due to their high quality standards and excellent performance. The following are its main application areas: 1. Medical and health field Hospitals and clinics: In the medical environment, sanitary grade fittings are used to connect various medical equipment, such as infusion tubes, hemodialysis equipment, surgical instrument cleaning systems, etc., to ensure the safety and hygiene of the medical process. Laboratory: In biological and chemical laboratories, sanitary grade fittings are used for transporting and storing various reagents, drugs, and samples to prevent cross contamination and ensure the accuracy of experimental results.

2024-09-30

Scope and characteristics of sanitary grade ball valves

Sanitary ball valve is a type of valve widely used in industries such as food and pharmaceuticals. Its scope of application and characteristics can be summarized as follows: scope of application 1. Food industry: Sanitary grade ball valves can be used on food and beverage production lines to control the entry and exit of raw materials and the transportation of products. Due to its high hygiene standards and good sealing, it is very suitable for handling food media to avoid contamination. 2. Pharmaceutical industry: In the purified water system and sewage treatment system of the pharmaceutical industry, sanitary grade ball valves can quickly control the flow rate of the medium. At the same time, its corrosion resistance can also meet the special requirements of the pharmaceutical industry for valve materials. 3. Other fields: In addition, sanitary grade ball valves are widely used in agricultural machinery

2024-09-30

What are the differences and similarities between eccentric and concentric heads

Eccentric and concentric reducers both play a role in connecting pipes of different diameters in pipeline systems, but they have significant differences in design, usage scenarios, and functional characteristics. Here is a detailed analysis of the differences and similarities between the two: difference 1. Shape differences: Eccentric head: The centers of the two ends of the pipe are not on the same straight line, that is, their circumferences are inscribed. This design gives the eccentric head a specific advantage in horizontally installed liquid pipelines. • Concentric head: The centers of the two ends of the pipe are on the same straight line. This symmetrical design enables concentric heads in fluid transport pipelines, especially in gas or vertically flowing liquid pipelines, to control the flow state of the fluid

2024-09-30

What are the connection methods for sanitary butterfly valve fittings

Sanitary butterfly valve fittings have multiple connection methods to meet the needs of different industries and application scenarios. Here are several common connection methods: 1. Clamp Connection: Use clamps to quickly connect the valve to the pipeline. Installation and disassembly are very convenient and do not require tools. • No dead corners design, easy to clean and disinfect. Widely used in industries such as food, beverage, pharmaceuticals, and cosmetics, suitable for occasions that require frequent disassembly and cleaning. 2. Flange connection: Fix the flanges at both ends of the valve and the flange of the pipeline together with bolts.