How to distinguish between threaded valves, threaded flange valves, and welded flange valves

Threaded valves. It means that the connection between the valve and the pipe is threaded, and the valve is wired, which is used for the pipe with a smaller diameter.

Threaded flange valves.

It is said that the valve is a valve with a flange, and there is a wire on the flange, which is threaded with the pipe, and is used for inconvenient welding, such as galvanized steel pipes;

Welded flange valves.

It is said that the connection with the pipe is welded, and the diameter is larger.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

1. The valve connection method is different.

These two kinds of valves have their own flanges, also called flange valves, but the threaded flange valve is a threaded connection between the valve and the flange, that is, a threaded valve with two inner wire flanges; The welded flange valve comes with, that is, the flange on the weld has no thread, and a flange is welded at the end of the pipe to be bolted with the welded flange valve.

2. The threads are different.

Flanged valves are valves that are flanged to the pipeline, and this connection is the most common. Threaded valve mainly refers to the valve body with internal or external threads, which are connected with the pipeline thread. Whereas, welded flange valves do not have threads.

3. The scope of application is different.

Threaded flange valves are generally used in small diameter, low pressure, and the temperature is not too high for inconvenient disassembly and repair, and the threaded flange valve has the characteristics of convenient installation and maintenance, and can be used on some pipelines that are not allowed to be welded on the site. Welded flange valves are widely adaptable and easy to service.

The connection at both ends of the valve is not the same.

The welded valve is butt welded or socket welded, which is a step hole.

A threaded valve is a threaded valve that connects the two ends through threads and pipelines.

Flange valves are connected by flanges and pipeline flanges.

Threaded valves: internal threaded valves, external threaded valves, mainly refer to valve valves with internal threads or external threads connected with pipeline threads, called threaded valves, threaded valves, and internal tooth valves.

Blue valve: Blue valve refers to the connected blue valve, the connected type of blue valve pipeline is stable, and the high-pressure pipeline is used by the blue valve.

Plastic ball valve: plastic ball valve is suitable for interception of corrosive media during transportation, according to the temperature of the same material, -14 100, -40 140, all parts are assembled with RPP or PVDF injection molded parts, and the plastic ball valve has excellent corrosion resistance.

Hello,Welded flange valve manufacturer imported from the United States - Kornke KNKEGlad for your question.

Welded flange valve is welded flange valve, and the connection between the pipe and the flange is welded and flanged.

The flange in the welded flange valve is a flat welded flange, which can be directly welded to the pipeline, and can be divided according to the connection mode with the pipeline, and can be divided according to the connection mode between the valve and the pipeline;

1 Flange connection valve: the valve body is flanged, and the valve is flanged with the pipeline.

2 Threaded connection valve: a valve with internal or external threads on the valve body and threaded connection with the pipeline.

3. Welded connection valve: The valve body has a welded mouth and adopts a welded connection with the pipeline.

4. Clamp connection valve: the valve body is equipped with a clamp port and is connected with the pipeline by clamp coupling.

5. Ferrule connection valve: The valve is connected to the pipeline by ferrule.

Keen KNKE imported electric ball valve.

That's itThe United States imported welded flanges to mark the valve manufacturer - Kornke KNKEThe answer to what is a welded flange valve, I hope my help to you, and more information about welded flange valves, you can go to the official website of Kornke Industries in the United States for reference.

Welded flange valve is a kind of porous media control valve made of straight welding, which can effectively control the flow rate and flow rate of the medium in the pipeline. It is characterized by its simple structure and reliable performance, and is commonly used in industries such as utility facilities, chemicals, and power plants.

Welded flange valve is a kind of valve welded with the pipeline, which is connected by welding the connecting part of the flange or valve with the pipeline. This valve is characterized by small diameter, simple structure, flexible operation, low throttling resistance, good sealing performance, easy installation, and diverse dry mu models. In addition, because it is welded to achieve the connection of pipes, it is stronger and safer than threaded flange and flange connections, and is generally used in high-pressure, high-temperature and leak-prone pipeline systems.

Threads, flanges, and welds all refer to the way valves are connected. Each valve has a different connection type. If you don't know it, please check: Beijing Shougong Valve Manufacturing **** "Shougong Valve".

To show you**, internal thread, external thread, flange, welding, clamp, clamp, ferrule, all valves can be threaded, flanged, welded connection, threaded and welded below 50, most of the above 50 are flanged.

Threaded valves are thread-mounted;

The flange valve is flanged installed;

Generally, the flange and valve of the flange valve are a whole. If the flange is connected to the valve using threads, it is called a threaded flange valve. Underneath is a threaded flange, which can be connected to the threaded valve above, if appropriate.

Thread valves are generally used in small diameters, low pressure, and low temperatures. inconvenient to disassemble and repair;

The flange valve has a wide range of adaptability and is easy to maintain;

Threaded flanges have the characteristics of easy installation and maintenance, and can be used on some pipelines that are not allowed to be welded in the field. The alloy steel flange has sufficient strength, but it is not easy to weld, or the welding performance is not good, the threaded flange can also be selected. However, under the condition that the temperature of the pipe changes sharply or the temperature is above 260 and below -45, it is recommended not to use a threaded flange to avoid leakage.

Threaded flange valves and flange valves are mainly connected in different ways:

Threaded flange valve refers to the threaded connection flange.

The flange valve is welded in the connection.

Usage: Threaded valves are generally used on small diameter pipes, flange valves are generally used on large diameter pipes, or according to the design.

Threaded valve: Threaded valve is a kind of valve fitting, which mainly refers to the valve body with internal or external threads, which is threaded with the pipeline. Threaded valves are usually fitted with atmospheric low pressure above.

Flange valve: English name; The opening and closing parts of the Flange Gate Valve are rams, the direction of movement of the ram is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and closed, and cannot be adjusted and throttled.

This is a statement in the books, in fact, it is often said that the thread connection products, generally used for the connection of welded pipes, the most commonly used is from DN15-DN100. Threaded flange is a kind of flange structure type widely used in engineering construction, which has the advantages of convenient on-site installation and no need for welding. Since this revision expands the outer diameter series of steel pipes applicable to flanges from metric pipes to two steel pipe outer diameter series, metric pipes and inch pipes, the variety of threaded flanges has been added with reference to ISO7005-1.

Threaded flanges are only available for inch tube series. When the thread type used in the threaded flange has 55 pipe threads specified in GB7306, the outer diameter of the steel pipe used in the DN150 flange should be. When the 60 tapered pipe thread is used, the outer diameter of the steel pipe used with the DN65 flange should be 73mm; The outer diameter of the steel pipe used with the DN125 flange should be.

Special attention should be paid to the nominal pressure range and nominal diameter range of the threaded flange with reference to ISO7005-1. for, DN10 150mm.

There are two types of sealing surfaces for threaded flanges: full plane and raised surface. Taking into account the structural characteristics of the threaded flange. Therefore, it should not be used in flammable, explosive, high and extremely hazardous occasions.

Low nuclear pressure, such as air conditioning water systems, etc., is safe to use. For example, the pipe fittings on the tap water used in the home are threaded.