How to distinguish the variable diameter, full diameter and shrinkage of the valve? Why?

Here are some 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, Chaoda, 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.

Summary. Hello dear, happy to answer for you. Definitions:

The national standard, the American standard and the European standard do not put forward the problem of full bore ball valve and reduced diameter ball valve, requiring all ball valves to carry out pressure drop test, only the Korean standard stipulates: when the inner diameter of the ball ball is small and the inner diameter of the thousand ball valve port is 85%, it is called the reduced diameter ball valve, and the inner diameter of the ball valve is greater than 95% of the inner diameter of the ball valve port.

The full diameter is the same width flow channel, that is, the size of the channel from the flow in to the flow out is the same, and its size can not be small to the value specified in the standard, which is probably equivalent to the nominal diameter of the specification, such as the DN50 full diameter ball valve flow channel diameter is about 50;

The inlet of the flow channel of the reduced ball valve is wider than the flow channel diameter, and the actual diameter of the flow channel is about one size smaller than the specification, such as the DN50 reduced diameter ball valve flows to the diameter of about 38, which is roughly equivalent to the specification of the DN40.

Is the full diameter of the valve expensive or the reduced diameter expensive?

Hello, I have seen your question and am sorting out the answer, please wait a while.

Hello dear, I am glad to answer your Hu Zhengfeng's pants. The full diameter of the valve is expensive or the diameter is reduced; The full-bore all-welded ball valve of DN1200 is tens of thousands of yuan more expensive than the reduced-diameter one.

Hello dear, happy to answer for you. Definition: The national standard, the American standard and the European standard Hongshen do not raise the issue of full bore ball valves and reduced bore ball valves, and require all ball valves to be tested for pressure drop, which is only stipulated in the Korean standard

When the inner diameter of the ball ball is small, the inner diameter of the ball valve is 85%, and when the inner diameter of the ball valve is greater than 95% of the inner diameter of the ball valve port, it is called the full-bore ball valve. The full diameter is the same width flow channel, that is, the size of the hole trace stuffy channel from the flow in to the flow out is the same, and its size can not be small to the value specified in the standard, which is probably equivalent to the nominal diameter of the specification, such as the DN50 full diameter ball valve flow channel diameter is about 50; The inlet of the flow channel of the reduced ball valve is wider than the flow channel diameter, and the actual diameter of the flow channel is about one size smaller than the specification, such as the DN50 reduced diameter ball valve flows to the diameter of about 38, which is roughly equivalent to the specification of the DN40.

Applicable process: For pipelines that need to be pigged regularly, no matter what kind of medium is transported, it is necessary to use the full-bore ball valve. The passage of the medium through the full-bore ball valve does not reduce the flow rate and the low flow resistance makes it ideal for pipeline control, especially in demanding applications.

When the main lines in oil pipelines and gas pipelines need to be buried underground, full-bore welded ball valves are used. When choosing, please note that the reducer ball valve is suitable for working conditions such as low requirements for a judgment of age difference and low convection resistance.

The diameter of the valve is the size of the diameter of the orifice.

The diameter of the valve is the size of the diameter of the orifice.

The valve (famen) is a control component in the fluid transfer system, which has 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. Valves 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. According to the material, the valve is also divided into cast iron valves, cast steel valves, stainless steel valves, etc.), chromium-molybdenum steel valves, chromium-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard customized and other valve materials.

1 In the case of a plate mounted valve, the bore is the diameter of the oil hole under the valve body. For example, Rexroth's directional valve 4WEh25 valve has a diameter of 25 and a diameter of 25 mm for the four large holes under the valve body.

2 Threaded connection valves, there are several cases.

1 High pressure valve, external thread - metric thread, the diameter is the inner hole size of the joint body.

2 High Pressure Valve, Female Thread—Metric Thread, the bore diameter is the bore diameter of the standard fitting used with the connecting thread.

Usually the corresponding is: the diameter of 10 is actually 10

The diameter of 15 is actually 13

m27x2 -- OD20 Actually 18m33x2- -OD25 Actually 22m42x2- -OD32 Actually 30m48x2-- OD40 Actually 38

3 The diameter of the low pressure and inch threads is consistent with the water pipe standard.

1/4"--OD 11

3/8"--Diameter.

1/2"--OD 15

3/4"--OD 20

1"--- diameter 25

1 1 4"--32

1 1 2" -- 40 diameter

2"--Diameter 50

There are also some cartridge valves, and the diameter is not easy to say. Rexroth's logic cartridge valve is still standard, and the oil passage of the valve block is required. Sun and Heidefus's are not strict.

It depends on the maximum amount of traffic it can have per minute.

Necking: That is, the interface of the valve is smaller than the installation pipeline.

Connection method: Generally, such valves are welded, that is, welded with pipes.

Full neck: that is, the valve connection port and size are equal to the pipe.

Connection method: Generally, the connection method of such a valve includes flange connection and clamp type.

Geometrically, the full diameter is the opposite of the concept of the radius, which is only half and the full diameter is the whole. From the hardware industry, the full diameter refers to the same diameter of the valve and the diameter of the connected pipe. Reduced diameter means that the diameter of the valve should be smaller than the diameter of the connected pipe.