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2026-05-23

What are the types and classifications of ball valves?

A ball valve is a commonly used type of valve. It controls the flow of media by rotating the ball, and has the advantages of simple structure, convenient operation, and good sealing performance. According to different classification criteria, ball valves can be divided into the following types: 1. By structural form Floating ball valve Features: The ball will move towards the outlet end valve seat under the pressure of the medium, forming a single-sided forced seal. Application: Suitable for medium and low pressure conditions. It has a simple structure, a lower price, but its sealing performance depends on the medium pressure. Fixed ball valve Features: The sphere is fixed by the upper and lower shafts and does not move when under pressure. The valve seat adopts a floating or elastic design, ensuring stable sealing performance.

2026-05-23

20 Technical Terms Related to Stainless Steel

Here are 20 technical terms related to stainless steel, based on information from multiple authoritative sources: 1. SUS (Steel Use Stainless): The international abbreviation for stainless steel materials, widely used in international trade to identify stainless steel products. 2. 304/316L: Common grades of stainless steel materials, indicating 18% and 16% chromium content respectively, and 8% and 10% nickel content respectively, with excellent corrosion resistance. 3. Acid pickling: A surface treatment process for stainless steel, using chemical methods to remove surface oxide scale and chromium compounds formed during welding, improving surface smoothness and enhancing the product's appearance and corrosion resistance. 4. Polishing: A surface treatment process for stainless steel, achieved through mechanical or chemical methods to make the surface smooth and shiny, enhancing the product's appearance and corrosion resistance.

2026-05-23

Analysis of the Advantages and Disadvantages of the Five Common Valves

The five common types of valves include gate valves, butterfly valves, ball valves, stop valves and plug valves. Each of these valves has its own advantages and disadvantages. The following is a detailed analysis of the advantages and disadvantages of these five types of valves: Gate valve Advantages: Low fluid resistance: When the gate valve is fully opened, the entire channel is unobstructed, resulting in relatively low fluid resistance. Small opening and closing torque: Compared to the globe valve, the opening and closing torque of the gate valve is smaller. Unrestricted medium flow direction: The gate valve can be used in pipeline networks where the medium flow direction is unrestricted. Less erosion on the sealing surface: When fully opened, the sealing surface of the gate valve is less eroded by the working medium. Simple structure: The shape and structure of the gate valve are relatively simple, and the manufacturing process is good. Short structural length: The structural length of the gate valve is relatively short, making it convenient for installation and layout.

2026-05-23

Analysis of International Standards for Valves and Selection of Valves

The comparison and selection of international standards for valves involves multiple aspects, including the history, current situation, standard content, and considerations when choosing among different standards. Here is a detailed analysis of this topic: 1. Major Valve Standard-Setting Organizations 1) International Organization for Standardization (ISO) History and Current Situation: ISO is a global non-governmental organization founded in 1947, dedicated to developing internationally agreed-upon standards worldwide. Its standards cover a wide range of fields, including valve design, manufacturing, materials, dimensions, testing, etc.

2026-05-23

How are the models of ball valves distinguished and compiled?

The classification and compilation of ball valve models are mainly based on a series of standardized parameters, which together form the model identification of the ball valve for identification, purchase, and use. The following is a detailed explanation of the methods for classifying and compiling ball valve models: 1. Basic composition of ball valve models The model of a ball valve is usually composed of multiple parameters, including but not limited to: valve type, connection method, material, nominal diameter, nominal pressure, operating mode, etc. Through the combination of these parameters, a unique ball valve model can be determined. 2. Specific parameters of ball valve models Valve type:

2026-05-23

The working principle and maintenance methods of hard-sealed butterfly valves

Working Principle and Maintenance Methods of Hard Sealing Butterfly Valve I. Working Principle The hard sealing butterfly valve achieves the opening, closing or regulation of the pipeline medium by rotating the butterfly plate. Its core structure and working logic are as follows: 1. Structure Composition Butterfly Plate: A circular disc-shaped opening and closing component, rotating around the fixed axis inside the valve body (0°~90°) controls the flow of the medium. Valve Body: A cylindrical channel providing the path for the medium to flow, forming a sealing surface with the butterfly plate inside. Valve Rod: Connecting the butterfly plate with the driving device, transmitting the rotational power. Sealing Pair: Using metal-to-metal sealing (such as stainless steel and graphite composite plates), or replaceable metal sealing rings to ensure sealing performance under high-temperature and high-pressure conditions. Drive Device: Supports manual, electric, pneumatic or worm gear rod transmission to achieve remote or automated control. 2. Opening and Closing Process

2026-05-23

The difference between gate valves and globe valves

1. Structure Difference The valve core of a gate valve is a gate plate (flat plate or wedge-shaped), and its movement mode is up and down, similar to lifting a sluice gate. The gate plate moves perpendicularly to the direction of the medium flow. The valve core of a globe valve is a valve disc (circular disc-shaped), and its movement mode is front and back pushing and pulling, moving along the axis of the valve seat. It is like a piston. 2. Flow Path Difference When the gate valve is fully open, the flow path is straight-through, and the medium can pass through without any obstruction. Therefore, the flow resistance is extremely small. The flow path of the globe valve is S-shaped and bent. The medium must bend around the bend to pass through, so the flow resistance is relatively large. Even when fully open, there is still some resistance.

2026-05-23

Three-piece forged steel ball valve: Structural analysis, performance advantages and application scenarios

The three-piece forged steel ball valve is a type of valve that achieves the on-off or regulation of the medium by rotating the ball. Its core structure consists of the valve body, the ball, the valve stem, and the sealing components. It features high pressure resistance, corrosion resistance, and ease of maintenance, and is widely used in industries such as petroleum, chemical engineering, and energy. The following analysis is conducted from four dimensions: structure, performance, application, and selection suggestions.

2026-05-23

What are the precautions to be taken during the use and installation of the high-pressure check valve?

The precautions for high-pressure check valves cover various aspects such as pre-installation preparations, installation process, operation usage, and regular maintenance. Only by strictly following these precautions can the high-pressure check valve operate normally and ensure safety in high-pressure environments.