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No, the parallel double gate valve should be installed on the horizontal pipe.
The double gate valve should be installed vertically (i.e., the stem is in the vertical position of stainless steel flange, stainless steel globe valve, copper valve, butterfly valve, stainless steel elbow, sanitary pump, filter, copper valve, and handwheel at the top). Gate valves with bypass valves should be opened before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force). The gate valve with transmission mechanism shall be installed according to the provisions of the product instruction manual.
If the valve is opened and closed frequently, lubricate it at least once a month. The gate valve is used as a shut-off medium, and the entire flow is straight when fully opened, and the pressure loss of the medium ball valve operation is minimal.
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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.
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The general angle of the gate valve is 5 degrees, so you can collect more information to see.
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degree, etc., the angle size depends on the temperature of the medium, generally the higher the temperature, the larger the angle, in order to reduce the temperature change wedge.
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It is used in petroleum, chemical industry, natural gas, etc.
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According to the sealing surface configuration, gate valves can be divided into wedge gate valves and parallel gate valves. In the wedge gate valve, there are single rams, double rams and elastic rams. Wedge gate valves include wedge gate valves with purge holes, Z15T W internal threaded wedge gate valves, etc.; Parallel gate valve products include Z944T W electric parallel double gate gate valve and Z44T W parallel double gate gate valve.
There are advantages and disadvantages between single gate and double gate single gate wedge gate valves, and the choice should be fully weighed. The single gate valve has a simple structure and reliable use, but it has high requirements for the accuracy of the sealing surface angle, which is difficult to process and maintain, and is easy to wedge when the temperature changes. Double gate wedge gate valves are mostly used in water and vapor medium pipelines.
Its advantages are that the accuracy of the sealing surface angle is low, the temperature change is not easy to cause the phenomenon of wedge, and the gasket can be compensated when the sealing surface is worn. However, there are many parts of this structure, which are easy to bond in viscous media and affect the sealing. The main thing is that the upper and lower baffles are easy to rust when used for a long time, and the ram is easy to fall off.
The elastic ram wedge gate valve, which has the advantages of simple structure and reliable use of single ram wedge gate valve, can produce a small amount of elastic deformation to make up for the deviation caused by the processing process of the sealing surface angle, and improve the manufacturability, has been widely adopted. Parallel ram gate valves can also be divided into single ram type and double ram type.
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Gate valve can be divided into wedge type and parallel type according to the structure, and the wedge-type single gate valve is a dark rod, which is mostly suitable for the working condition that the working face is narrow and deeper; The double ram is mostly used for the crossover width of the working face, and the opening and closing of the valve can be manually operated according to the lifting height of the valve stem thread to control the flow rate of the medium.
The parallel type is generally a double ram.
Secondly, the single gate and double gate valve models are not the same. Z41Y-16 is a single gate flange gate valve, and Z42-16 is a double gate valve; Z44T-10 is an open rod double gate, Z45T-10 is a dark rod single gate flange gate valve More questions can be asked.
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The single ram is mainly used to force the seal when it is closed. The double ram is closed by force balance and mutual compensation. Under the condition of high temperature and high pressure, the double ram is better than the single ram structure.
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Double gate valve is the general term for all double valve gate valves.
There are generally two kinds of double gate valves, one is the wedge double gate valve (that is, the sealing surface of the gate plate and the center line of the valve stem are at a certain angle, some, there are 5 °, and the design of different manufacturers is different), and the other is the parallel double gate gate valve, the gate sealing surface of the gate valve and the center line of the valve stem are parallel, and the two gate plates are separated in a K-shape. The latter is generally used in the oilfield. Parallel double gate gate valves are divided into two types: with diversion and without diversion.
The one with diversion can pass through the ball. Most of the oilfields are with diversion.
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Of course, it is a parallel double gate valve.
When the specifications, pressure level, and valve body material are the same, the parallel double gate gate valve is almost 6-7 folds of the soft seal ball valve, and about 3 folds of the hard seal ball valve.
I have been engaged in valve procurement for more than 10 years.
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The 45 degree angle piece is used in the place where the bevel connection is required, and the general workbench is connected with the right angle connector. 45-degree angles are rarely used. Conveyors such as this use 45-degree and 135-degree angles.
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Adjusting the various shower outlets first requires different specifications of curved angles (different angles, widths, lengths, and swing angles), secondly, thinnest wrenches and 6-point caps of different diameters and heights for easy operation, and finally absolute patience and imagination! 1. The upper and lower parts of the hot and cold water outlet holes of the shower are not at the level of 180 degrees, that is, the height is uneven, which causes the problem of crooked shower pipes: using the conventional 45-degree standard curved angle, the height difference range of adjustment is best within 15 mm, and the extreme situation is not more than 30 mm, but it is extremely difficult to adjust.
Widen the curved angle, increase the curved angle by 90 degrees, and the adjustable height difference (according to the standard 150 mm spacing) on the market can reach up to 240 mm! The spacing between the central shafts of the inner wires of the duplex is 150 mm, and the spacing of the installation holes of the shower is also 150 mm. Adjust the technique: Rotate the corners on both sides at the same time to adjust the satisfactory installation level, remember the position, wrap the raw material belt in the counterclockwise direction, or use the liquid raw material belt to install the shower mixing valve.
2. Adjustment of the spacing between hot and cold water holes: the standard 45-degree angle adjustment range is 15 mm, the widest 165 and the narrowest 135 mm, if not within this range, the maximum widening angle adjustable range on the market is 90 mm; The narrowest is 60 mm and the maximum is 240 mm. 3. Adjust the distance between the inner wire interface of the water pipe and the wall
Curved corners of varying lengths are required, with a maximum of 90 mm and a minimum of 40 mm. Generally used 48-50 mm length curved corners. 4. The axial direction of the wire in the hot and cold outlet hole is not correct
It is said that the water hole of the shower is crooked and biased. This was extremely difficult to solve in the past, and now it is rarely encountered. In addition to smashing the wall, double the gasket, changing the slope of the gasket, and changing the axial direction of the curved corner (cutting the curved corner and re-welding it at the required angle).
Now there is a Vientiane curved angle on the market, which can adjust the axial swing range of 0 to 40 degrees. Tip 1: The use of 6 points faucet decoration cover, the maximum diameter is 80 mm, the common is 63 mm, the highest is 25 mm, the lowest is only 6 mm, and the inner diameter is generally mm.
In addition to the highest size specification, the other data can be processed by yourself, which requires a file or dry-ground iron sandpaper, and 240 sandpaper can be used to produce the size of the cover you need. Tip 2: Different specifications of curved corners can be used together, and use your imagination to solve all difficulties!
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The upper and lower levels generally cannot exceed 3 cm, and if it exceeds too much, it can only be changed to surface-mounted.
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Now the shower comes with a pair of wires are generally curved feet, you can adjust the up and down not level to the level of the installation, if the shower is an ordinary pair of wire, you can also buy a pair of curved feet.
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