What is the difference between a cast steel blocking valve and a globe valve

Biaoguang valve professionals will answer for you, cast steel blocking valve is a control component in the fluid transportation system, with the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves for fluid control systems range from the simplest shut-off valves to the most complex valves used in automated control systems. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals and radioactive media.

The shut-off valve is a forced seal valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the valve disc, the resistance that needs to be overcome by the operating force is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium, and the force of closing the valve is greater than the force of opening the valve, so the diameter of the valve stem should be larger, otherwise the failure of the top bend of the valve stem will occur. According to the connection method, it is divided into three types:

Flange connection, thread connection, welded connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the disc to enter the valve cavity, at this time, under the action of medium pressure, the force of closing the valve is small, and the force of opening the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also tighter.

China's valve "three to give" has stipulated that the flow direction of the globe valve is all top-down. Hope it helps!

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.

Hello answer According to the information you provided, I found for you, first of all, their structure is different, the gate valve can rely on the medium pressure to tightly close the sealing surface, so as to achieve the effect of no leakage. When the valve core and the sealing surface of the valve seat are always in contact and rub against each other, the sealing surface is easy to wear, and when the gate valve is close to closing, the pressure difference between the front and rear of the pipeline is very large, which makes the wear of the sealing surface more serious. The second is that the working principle is also different, when the globe valve is opened and closed, it is a rising valve stem type, that is to say, the handwheel is rotated, and the handwheel will rotate and lift with the valve stem.

The gate valve is a rotating handwheel, so that the valve stem does a lifting movement, and the position of the handwheel itself remains unchanged.

Flow rates vary, and gate valves require full open or full closing, while shut-off valves do not. The globe valve has specified inlet and outlet directions, and the gate valve has no inlet and outlet direction requirements. In addition, the gate valve only has two states of full opening or fully closing, and the stroke of the gate opening and closing is very large, and the opening and closing time is long.

The movement stroke of the valve plate of the globe valve is much smaller, and the valve plate of the globe valve can be stopped in a certain place during the movement for flow regulation. The gate valve can only be used for truncation and has no other functions.

The difference between globe valve and gate valve is structure, working principle, installation method, resistance to fluid, flow lift and rolling excavation volume and function. Working principle: The globe valve works with a rising valve stem type, and the handwheel rotates and rises with the valve stem.

The gate valve works by rotating the handwheel and the valve stem does a rising motion. Flow and function: The gate valve is required to be fully open, and the globe valve is not required to be fully open.

Globe valves are generally used for pressure flow control, and gate valves are used for isolation. <

The differences between globe valves and gate valves include structure, working principle, installation method, resistance to fluid, flow rate and function.

1. Structure. Globe valves have a spherical, taper, and flat spool that is pressed down to the seat and sealed, and the disc of the globe valve is parallel to the fluid. The spool of the gate valve is a ram, which is snapped down to the front and rear valve seats for sealing. The disc of the gate valve is a ram and is perpendicular to the direction of the fluid.

2. Working principle.

The globe valve works with a rising valve stem type, and the handwheel rotates and rises with the valve stem. The gate valve works by rotating the handwheel and the valve stem does a rising motion.

3. Installation method.

When the shut-off valve is installed, the medium can enter from below and above the spool, while the flow direction of the gate valve from below and above has the same effect. The gate valve does not have the requirements for the direction of the inlet and outlet, and the shut-off valve has the requirements for the import and export.

4. Resistance to fluid.

The flow resistance of the gate valve to the fluid is relatively small, and the flow resistance coefficient of the ordinary gate valve is about and the opening and closing force is small. The medium can flow in both directions. Whereas, the resistance coefficient of an ordinary globe valve is about.

5. Flow and function.

The gate valve is required to be fully open, and the globe valve is not required to be fully open. Globe valves are generally used for pressure flow control, and gate valves are used for isolation.

Whether it is a variety of valves often used in production or life, valves such as globe valves, gate valves, butterfly valves, check valves and ball valves are indispensable grip control components in various pipeline systems. People who are new to the chemical equipment industry may be a little confused, ball valves, gate valves, butterfly valves, check valves, these should be used under what circumstances. So, what is the difference between a globe valve and a gate valve?

The difference between globe valve and gate valve.

1. The working principle is different: the globe valve works with a rising valve stem, and the handwheel rotates and rises with the valve stem; The gate valve works by rotating the handwheel of the sedan car, and the valve stem does the upward movement.

2. Different sealing: the sealing surface of the gate valve is a small trapezoidal side, which is sealed by the side of the valve core gate, and the sealing effect is not as good as the globe valve, and the valve core will not be closed when the valve station is closed like the globe valve.

3. Different flow resistance: when the gate valve is fully opened, the whole flow channel is straight, and the pressure loss of the medium is minimal at this time. Compared with globe valves, its main advantage is that the fluid flow resistance is small, the flow resistance coefficient of ordinary gate valves is about, and the resistance coefficient of ordinary globe valves is about.

4. Different installation methods: when the globe valve is installed, the medium can enter from below and above the valve core, and the flow direction of the gate valve has the same effect from below and above. There are no inlet and outlet direction requirements for gate valves, and there are regulations for inlet and outlet of globe valves.