The fully welded ball valve is a kind of welded ball valve, and the valve body structure is welded to ensure the sealing of the ball valve. For the fully welded ball valve, customers will often see explanations: this valve has a 20-year warranty, high safety and zero leakage. Why did the fully welded ball valve win such praise? First of all, the valve seat of fully welded ball valves is composed of the carbide Teflon sealing ring and the coffee spring, so it has strong adaptability to changes in...
Why Does Fully Welded Ball Valves Have a Long Service Life? Read
More »
(1) Selection of materials for the valve body and internal parts For control valves used in conditions above 450℃, the highest temperature of general materials can be about 500℃. For the temperature above 538℃, chromium-molybdenum steel is usually used for valve bodies. SUS310S stainless steel is usually used when the highest temperature is about 1035℃ and the carbon content of the material must be controlled between 0.04% and 0.08%. For higher temperatures, it is recommended...
Selection Elements of High Temperature Control Valves Read
More »
A knife gate valve is also called a slurry valve or a mud pump valve. The moving direction of its disc is perpendicular to the fluid direction, and the medium is stopped by the disc (knife) which can cut through fiber materials. In fact, there is no cavity in the valve body. And the disc moves up and down in the side guide slot and is pressed against the valve seat by the lug at the bottom. If higher sealing is required, the O-ring on the valve seat can be...
What is a Knife Gate Valve? Read
More »
The function of the wafer hard seal butterfly valve is mainly to regulate the flow of a fluid in the pipe, so what can affect this function? The materials used for the valve are critical. At present, the sealing surface of the wafer hard seal butterfly valve is forged by metal materials and all the valve parts are forged by stainless steel. In this way, the hard seal butterfly valve can well control large flow and the high flow rate of the medium in some pipes. Moreover, this butterfly...
An Introduction to the Wafer Hard Seal Butterfly Valve Read
More »
The temperature that the valve can withstand is dependent on manufacturing materials, that is to say, the upper limit of the temperature that the material with poor high temperature resistance can withstand and the lower limit of the temperature that the material with poor low temperature resistance can withstand. Valve body materials of metal seated butterfly valves are not special. Like other valves, different metals are selected according to specific requirements....
The Service Temperature of Metal Seated Butterfly Valves Read
More »
1. Product reputation First of all, a ball valve is a kind of fittings used in pipes, and for the majority of pipes, ball valves and other fittings must have long service life, so that the pipe will not have problems for several years or even decades after being laid. Therefore, when choosing a ball valve manufacturer, you should start with its product reputation. 2. Product types The product type of ball...
How to Choose a Ball Valve Manufacturer? Read
More »
To understand how to deal with valve leakage, first know why this happens. To keep the valve airtight, it must have a good seal. If there is something wrong with the seal, valve leakage will occur. As a control component in the fluid delivery system, the valve has the functions of cut-off, regulation, diversion, backflow prevention, pressure stabilization, pressure relief, etc. It is an indispensable control element for many industrial and mining enterprises. Once the valve fails, especially the...
Preventive Measures for Valve Leakage Read
More »
In the 1950s, ball valves gradually appeared in the industrial production of western developed countries. Moreover, they are used more frequently, and their performances have been continuously improved. Nowadays, in China, ball valves are mainly used in pharmaceutical machinery, petroleum refining, water conservancy and chemical industry, electric power and other industries, which all play a very important role in the national economy. Therefore, ball valves are also indispensable in...
Why are Ball Valves Frequently Used in Various Fields? Read
More »
Due to the lack of awareness and technology of valve maintenance in the past, many users still adopt the extensive management—"mend the fold after a sheep is lost". In the absence of regular maintenance, once the valve leaks, it is seriously damaged, and may be irreparable. In addition, maintenance after valve failure is passive because safety risks have been caused and losses have occurred. It is extremely unfavorable to the safe operation of complete equipment and the service life...
Scientific Maintenance of Valves rather than Breakdown Maintenance Read
More »
When a valve is suddenly closed, shock waves are generated and cause damage to valves due to the high pressure caused by the mass of flowing water, which is so-called positive water hammer. On the contrary, when a closed valve is suddenly opened, it will also produce water hammer, called negative water hammer that is also destructive but is not as much as the former. Although water hammer makes a lot of noise, the real damage is caused by mechanical failure....
What is a Water Hammer Read
More »
