What is the difference between a power transmission joint and a limit expansion joint?

The power transmission joint is a new product that connects pumps, valves, pipelines and other equipment with pipelines, and connects them through all bolts to make them a whole, and has a certain amount of displacement, which is convenient for installation. It can withstand the axial pressure of the pipeline. In this way, it can be adjusted according to the on-site installation size during installation and maintenance, and when working, it not only improves work efficiency, but also plays a certain role in protecting pipeline equipment such as pumps and valves.

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. Appearance:

There are four flanges on the body of the limit expansion joint, and there are limit bolts and short bolts, but the bolts do not extend beyond the product itself; There are three flanges on the power transmission joint body, and the bolts are longer than the product body.

2. Function:

The expansion joint can be axially expanded and contracted within a certain range, and can also overcome the deviation generated by the axial direction of the pipeline within a certain angle, and can be freely expanded and contracted in the allowable expansion amount of the pipeline at the same time, but once it crosses its expansion limit bolt, it plays the role of limiting to ensure the safe operation of the pipeline; Before installation, the power transmission joint needs to adjust the installation length of the pipeline according to the reserved distance of the pipeline, connect the force transmission bolt, and lock the length, so it only plays a connecting role in the operation of the pipeline.

The main function of the force transmission joint is to transmit axial thrust, which can connect the valve and the pipe as a whole, and the installation length can be adjusted by bolts, the longest is the double flange force transmission joint model VSSJAF (C2F) and the single flange force transmission joint VSSJAFG (CF) detachable double flange force transmission joint VSSJAFC (CC2F).

The main function of the expansion joint is to elongate and compress the pipeline, compensate for the displacement caused by the thermal expansion and contraction of the pipeline, and facilitate the installation, disassembly and maintenance of valves and pumps. The most common are the double flange loose sleeve limit expansion joint VSSJA-2 (B2F) and the expansion joint SSQ, as well as the single flange limit expansion joint VSSJA-1 (BF), the flanged loose sleeve expansion joint VSSJA, the gland loose sleeve expansion joint SSJB, etc.

These joints are collectively referred to as pipeline loose sleeve expansion joints The country has a unified standard atlas GBt12465 Xicun Town, Gongyi City is the base for the production of pipeline joints, and has a relatively large market share in the country.

Gongyi Jiankun Water Supply Equipment Factory produces pipeline joints all year round.

The double flange limit expansion joint is suitable for both sides to be connected with the flange, adjust the connection length between the two ends of the product and the flange during installation, tighten the gland bolt evenly diagonally, and then adjust the limit nut, so that the pipeline can be freely expanded and contracted within the scope of expansion and contraction, lock the expansion and contraction, and ensure the safe operation of the pipeline. It is suitable for pipes connected with flanges on both sides, and the installation length of both ends of the product and the flange is adjusted during installation, and the gland bolts are evenly tightened diagonally to make it a whole and have a certain amount of displacement, which is convenient for installation and maintenance, and is adjusted according to the size of the site. The counteraxial thrust can be transmitted to the entire pipe during operation.

It can reduce the pressure thrust (blind plate force) of the connected parts and compensate for the installation error of the pipeline, and the double flange force transmission joint cannot absorb the axial displacement. The double flange power transmission connection is mainly used for the loose sleeve connection of pumps, valves and other accessories.

Expansion joints and force transmission joints are very widely used in the field of pipeline fittings, expansion joints are pumps, valves, pipelines and other equipment connected with pipelines, connected by bolts, making them a whole, and have a certain amount of displacement, so that the displacement compensation can be carried out for the axial displacement caused by thermal stress or other stresses of the pipeline.

For you to share the difference between the power transmission joint and the expansion joint, the bolt of the power transmission joint is relatively long and protrudes from the flange surface. Have you learned that the bolts of the expansion joint are flush with the flange and do not protrude from the flange face?

The connection function in the pipeline is the force transmission joint is an indispensable equipment in China's water purification and sewage industry, and plays an indispensable role in the entire sewage discharge link. Because of this, the power transmission joint is developing at a rapid pace in the water purification industry. China is not only a big agricultural country, but also a big machinery country, every town has established a variety of factories, and the sewage discharged from the factories must be reasonably discharged, and not cause pollution to the villages and people.

The applicable medium of the force transmission joint is used in the whole pipeline system, this product is a connection in the whole pipeline system, the pipeline system is used to transmit substances, mainly suitable for the following substances, gas, air, fuel oil, domestic sewage, lubricating oil, fresh water, seawater, hot and cold water, drinking water, refined oil, and the temperature of these substances is not higher than 250 degrees of steam and granular powder and other media. Because these substances are mainly transmitted through pipelines, in the process of pipeline transmission, these substances will definitely pass through the connection of force transmission joints or expansion joints, so the connection is directly related to whether the whole pipeline system is a benign transmission process, this use is very important and intuitive, the subtlety lies in the connection, a inheritance, a force transmission, this is the purpose of expansion joints.

The models of double flange power transmission joints are VSSJAF C2F type, VSSJAFC CC2F type; The main models of single flange power transmission joints are: VSSJAFG CF type

According to the structure, it is divided into:

1. Body 2, sealing ring 3, gland 4, short pipe flange 5, stud 6, nut Double flange power transmission joint is suitable for conveying seawater, fresh water, hot and cold water, drinking water, domestic sewage, fuel, lubricating oil, refined oil, air, gas, steam and granular powder with a temperature of no more than 250 degrees. Performance characteristics of double flange power transmission joint: The power transmission joint is made of flange stub and force transmission screw on the basis of the flange loose sleeve compensation joint, the difference between the sub-type compensation joint and the loose sleeve compensation joint and the loose sleeve limit compensation joint is that its compensation amount refers to the amount of adjustment in the installation and disassembly process, once all the nuts are tightened, it is rigidly connected, which can transmit the axial force, so as to protect valves, pumps and other equipment.

Double Flange Power Transmission Joint Installation Instructions Double flange power transmission joint is suitable for both sides of the flange connection, adjust the installation length of both ends of the product and the pipe or flange, after the installation and welding are completed, the diagonal gland bolt is tightened evenly in turn, making it a whole, and has a certain amount of displacement, which is convenient for installation and maintenance, and can be adjusted according to the size of the site. The axial thrust can be transmitted to the entire pipe during operation. The material of the power transmission joint:

The materials include Q235 carbon steel, stainless steel, cast steel, ductile iron, etc. Different materials and models are used for different applications. The classification of force transmission joints includes:

Single-shot orchid loose sleeve power transmission joint, double flange loose sleeve power transmission joint, detachable double flange loose sleeve power transmission joint.