When does the globe valve generally need to be reversed?

Hello, in the production of pharmaceutical antibiotics, the shut-off valve is often installed in reverse. In the use of the globe valve, it should be noted that the side of the valve seat (low position) is connected to the fermenter as much as possible, and the valve stem (high position) is not connected to the fermenter, and the flow direction of high in and low out is adopted, so as to prevent the pollution of the fermenter caused by leakage at the valve stem. This mounting direction is opposite to the direction of the arrow indicated on the front of the body. Wish!

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 are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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.

The installation direction of the globe valve is low in and high out, and the effects are as follows:

The flow rate cannot be adjusted (the spool of the globe valve is tapered, which has the characteristics of regulating the flow, and the medium at the inlet end of the reverse installation is not adjusted by the conical spool and directly overflows), which will affect the flow rate.

It is easy to cause damage to the shut-off valve (the installation direction of the shut-off valve is low inlet and high out, if there are impurities, it will be stuck in the groove of the water inlet end to prevent it from being stuck on the valve cone after overflow, wearing the valve core or causing the phenomenon of loose closing).

Advantages of using globe valves:

1. Double sealing design (bellows + packing) If the bellows fails, the stem packing will also avoid leakage and meet international sealing standards.

2. Safe and environmentally friendly, no fluid loss, reduce energy loss, and improve the safety of factory equipment.

3. Long service life, reduce the number of maintenance and reduce operating costs.

4. The sturdy and durable bellows sealing design ensures zero leakage of the valve stem and provides maintenance-free conditions.

Globe valve disadvantages:

1. The fluid resistance is large, and the force required for opening and closing is large.

2. It is not suitable for media with particles, large viscosity and easy coking.

3. Poor adjustment performance.

What will be the impact of the shut-off valve installed in reverse, the first is that the resistance will increase. The second is the most impactful, because the medium strikes the spool in the opposite direction, and the spool is easily washed out over time. Third, the adjusting capacity of the globe valve is stronger than that of the gate valve, and if it is installed in reverse, the regulating capacity will be disturbed, or even lose the regulating ability.

If the shut-off valve is installed in reverse, it may lead to inaccurate water flow control and increase the risk of water leakage.

As a control valve for water pipes, shut-off valves usually need to be installed correctly according to the direction of water flow. If the installation is reversed, the water flow control may be inaccurate and the ideal control effect cannot be achieved. In more serious cases, improper installation of the shut-off valve may increase the risk of water leakage and impair the proper functioning of the water pipe system.

Precautions for the installation of shut-off valves:

1. Select the appropriate location: select the appropriate valve according to the location of the installation to ensure that the fluid can be effectively controlled.

2. Clean the pipeline: Before installing the globe valve, the pipeline should be cleaned first to avoid impurities and dirt blocking the valve and pipeline.

3. Install the globe valve: install the globe valve on the pipeline and fix it as needed. After installation, make sure the valve is closed.

4. Test: After the installation is completed, the test should be carried out to ensure that the globe valve can operate normally. <>

The flow rate can not be adjusted (the valve core of the globe valve is tapered, with the characteristics of lead grinding to regulate the flow rate of early cracking, and the medium at the water inlet end after the installation of the locust bucket is reversed has not been adjusted by the conical valve core, and directly overflows), which will affect the flow rate.

It is easy to cause damage to the shut-off valve (the installation direction of the shut-off valve is low inlet and high out, if there are impurities, it will be stuck in the groove of the water inlet end to prevent it from being stuck on the valve cone after overflow, wearing the valve core or causing the phenomenon of loose closing).

Water at the mouth of the valve, as long as the support bar is gently loosened, the water will be swarmed out, if the installation is reversed, the water will hold the valve, the support bar becomes a pull bar, the water will be the door to hold the force is very large, soon the pull point or pull rod will be broken, the water door will never be opened. So don't get the wrong direction when installing the shut-off valve.

The globe valve, also known as the interception letter gate valve, is a kind of forced sealing valve and a kind of cut-off valve. According to the connection method, it is divided into three types: flange connection, thread connection, and welded connection.

China's valve "three to give" has stipulated that the flow direction of the globe valve is all top-down, so there is directionality when installing.