Meaning of valve model
There are many types of valves that can be represented. Let's talk specifically about how the types of valves are divided.
The code name of the heat insulation valve is B.
The valve code for slag discharge is p.
The fire damper code is F.
The code name of the quick valve is Q.
The code and model of each valve are different, which is the representation of the second function. The valve model also has a unit,
For example, butterfly valve code d.
Check valve bottom valve code is g.
The code name of the safety valve is a.
The code name of the drain valve is p.
The plunger valve code is u.
These are the codes on the valve when you buy it. Why do you want to use a code name to represent it? Because it is represented by code, it can be seen more clearly and simply what valve this is.
Valves come in different sizes, such as 4 inches, 3 inches, 2.5 inches, 2 inches, 1.5 inches, 1.2 inches, 1 inch, 6 inches, 3 inches, 2 inches and 4 inches. When we buy a valve, we must measure the size and choose the model before buying it, so as to avoid the trouble caused by not buying it.
In fact, the valve model is usually used to indicate the driving mode, connection form, nominal pressure, valve type, valve material, etc ... Now the standardization of valve model provides convenience for various valve designs. At present, China has achieved a unified standard for valve models, but due to the changes of the times, the valve industry can not adapt to the national standard, resulting in the valve industry can only formulate a set of coding methods belonging to its own manufacturers.
Now that the model of the valve is mentioned, someone asks? There is a valve model because the valve is useful, so what is the use of the valve? Valves are used to control the pressure and direction of a thing. General valves are used to control some corrosive, water, air, flowing liquid, etc. Used to change the cross section and flow direction of something. Most of them are done by pressure and can withstand low and high temperatures. Can be electric, manual, hydraulic, etc. , generally made of iron, steel, etc. Life span can be years or decades. This kind of valve appears in our daily life, such as gas tanks, faucets, stoves, etc ... many practical tools.
Types and principles of various valves
watergate
1. Gate valve is also called gate valve. This is a widely used valve. Its closed source? The reason is that the sealing surface of the gate and the sealing surface of the seat are highly smooth and flat. Cooperate with each other to prevent the medium from flowing through? And depends on the shape of the top die, spring or ram. Coming? Enhance the sealing effect. It mainly plays a cutting role in pipelines.
2. What are its advantages? :? Small fluid resistance, energy-saving opening and closing. Can it be bidirectional in the medium? Use in the case of flow. No direction,? When fully opened, the sealing surface is not easy to be corroded. The structural length is short. It is not only suitable for making small valves, but also suitable for making large valves.
3. Gate valves are divided into two types according to the thread of the valve stem? ,? One is the open rod type? ,? The second is the hidden rod type.
4. According to the ram structure? ,? Also divided into two categories? ,? One is parallel? ,? The second is the mode.
cut-off valve
1, stop valve,? Also called door cutting? This is the most widely used valve. Why is it so popular? Is it because the friction between sealing surfaces is small when opening and closing? More durable,? The opening height is not large. Easy to manufacture and convenient to maintain, not only suitable for medium and low pressure, but also suitable for high pressure.
2. What is its closing principle? Rely on the pressure of the valve stem. So that the sealing surface of the disc and the sealing surface of the valve seat are closely attached. Stop the media circulation.
3. The cut-off valve only allows the medium to flow in one direction. Orientation during installation. Its structural length is longer than that of gate valve. At the same time, the fluid resistance is high. Long-term operation? The sealing reliability is not strong.
4, cut-off valve is divided into three categories? :? Straight-through, right-angle and DC oblique globe valves.
Butterfly impala
1. Butterfly valve is also called butterfly valve. As the name implies,? Its key component is like a butterfly facing the wind. Free spin? .
2. The disc of butterfly valve is a disc. Rotate around the shaft in the valve seat. The rotation angle is the opening and closing degree of the valve.
3. Is the butterfly valve light in weight? ,? It saves material than other valves. Simple structure and quick opening and closing. Cut-off and throttling can be used. Small fluid resistance and labor-saving operation. Butterfly valve? It can be made into large caliber. Where can butterfly valves be used? It is best not to make a gate valve. Because butterfly valves are more economical than gate valves. And has good adjustability. At present,? Butterfly valves are widely used in hot water pipelines.
There are many kinds of valves, which also represent the rapid development of China. Valves have been dealing with our country for 4000 years. The invention of valves has brought a lot of convenience to many factories. I believe that with the development of the times, the development of valves will gradually become perfect, and the advantages of valves will be fully exerted one day.
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