Flange gate valves are the gate valves with flange connections, which are common in our daily life. The flange gate valve is stable and reliable when it is used in the pipeline, and it can't be used in the high-pressure pipeline. A high pressure national standard cast steel gate valve is suitable for the conversion of nominal pressure from 4.0 MPa to 10.0 MPa (1 MPa = 10 kg), and the working temperature is from - 29 ℃ to 600 ℃ in petroleum, chemical, pharmaceutical, chemical fertilizer, electric...
Main Design Features and Advantages of Flange Gate Valves Read
More »
Slurry valves and slurry pipelines appeared and developed simultaneously in China. A slurry valve is an important part of slurry pipeline system. And its investment is the highest, accounting for about one fifth of the total investment of pipeline engineering. At present, the commonly used slurry valves mainly include ball valves, plug valves, gate valves, knife gate valves and so on. The slurry valve is optimized and improved on the basis of the general valve structure. Compared with other general...
A Brief Introduction to Common Valves in Slurry Pipelines Read
More »
Feasibility of mid-cavity pressurization Technical regulations The gate valve technical specification stipulates that in addition to the containment isolation valve, test holes need to be drilled for valve bonnets of some valves for periodical inspection and plugged with a screw plug. See the figure 5. The hole drilling should meet the relevant requirements for the specific technical design. Figure 5 Drilling inspection holes on the valve bonnet For containment...
Pressurization Methods for Periodic Seal Tests of Nuclear Power Plant Gate Valves(Part Two) Read
More »
IV. Performance tests of electric ball valves 1. When the electric ball valve of a certain specification is manufactured in batch, the following performance tests shall be carried out: ① The opening and closing torque of the electric ball valve under the working pressure condition ② The continuous opening and closing times can ensure the close tightness of the electric ball valve under the working pressure condition. ③ The flow resistance coefficient test of the electric ball valve under the...
How to Choose Electric Ball Valves? - Part Two Read
More »
Machine selection is a messy process, which is a big problem for many people. As long as you choose the right product, you can have the greatest effect and give full play to its maximum value. Next let us see the in-depth analysis of flange gate valve selection skills. The selection skills of flange gate valves mainly include the following two points: 1. Structure and operation principles of radiator flange gate valves The temperature control in the user's room is completed by the radiator thermostatic...
How to Select Flange Gate Valves? Read
More »
Abstract: The sealing performance of the valves needs to be inspected during regular inspections of gate valves for containment isolation of nuclear power plants. The traditional test method is to pressurize on one side of the gate valve and measure on the other side. The advantage of this method is that the method of pressurization is the same as the pressure state in the valve working condition. The disadvantage is that its operating time is long and the detection process is exposed...
Pressurization Methods for Periodic Seal Tests of Nuclear Power Plant Gate Valves (Part One) Read
More »
When we purchase the electric ball valve, only the specification, category and working pressure can meet the purchasing requirements. Under the unified design concept of the electric ball valve, different innovations will be carried out, forming their own enterprise standards and product personality. I. General requirements 1. The specification and category of electric ball valves shall meet the requirements of pipeline design documents. 2. The model of electric ball valves shall indicate the requirements...
How to Choose Electric Ball Valves? - Part One Read
More »
What's the differences of three kinds of common stainless steel valves? Stainless steel 201, 304 and 316 are three common stainless steel materials. Although the surface material looks like stainless steel, their uses, prices and characteristics are different. Stainless steel 201 is the most cost-effective stainless steel material with low prices, but it is easy to rust. Stainless steel 304 is the most common and widely used stainless steel material, which is not easy to rust and has good...
The Differences of Three Kinds of Common Stainless Steel Valves Read
More »
It is very important to have a basic knowledge of the industrial performance requirements of valves, which will make it easier for us to select valves. It is recommended that the following five points should be keep in mind before starting selecting valves: 1. Valve sizes and types It should be pointed out that the valves in industrial equipment should perform multiple functions such as cuting off flows, transfering flows, mixing flows, pressure relief, preventing backflows and regulating flows....
The Selection Standard of Industrial Valves Read
More »
English
Español (España)
العربية