How the length of the 8 series of traps is determined

This question is very good, but it is very difficult, because the structural length specified in the standard is simply nothing, and the trap standard (GB T22654) is stipulated as follows - "The structural length of the trap is in accordance with the provisions of GB T12250, or according to the requirements of the order contract" If you want to specify the structural length of the trap, you must first distinguish the structure of various types of traps, and there are hundreds of types of traps produced in various countries, different types, different structures, different displacements, different pressure levels, Different body materials ......The length of their structure is different, and it is impossible to simply use the connection method (flange connection, threaded connection, socket connection, butt welding connection, etc.) to stipulate its structural length. So, how are the 8 series in the standard determined? You can only ask the members of the standard writing group.

I have participated in the solicitation of opinions on the preparation of the standard of the trap department, and there is also a discussion on the length of the trap structure, and the participating manufacturers are striving to include their existing structural length in the standard, so that they can save the follow-up rectification work in their own factories - changes in drawings, molds, and tooling.

I hope it helps.

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.

The working principle of the trap: use the density difference between steam and condensate, or change the physical properties of the phase to promote the opening and closing of the valve to work. Commonly used traps include float type, bell float type and thermodynamic type.

The steam trap is installed between the steam heating equipment and the condensate return header. When opened, the barrel is at the bottom and the valve is fully open. The condensate enters the trap and flows to the bottom of the barrel, filling the valve body, completely submerging the barrel, and then the condensate is discharged to the return header through the fully open valve.

Steam also enters the trap from the bottom of the barrel and occupies the top of the barrel, creating buoyancy. The barrel slowly rises and gradually moves the lever in the direction of the seat until the valve is completely closed.

A trap is a type of valve, also known as a trap, drain valve, which is to discharge condensate, air and carbon dioxide gas from the steam system as soon as possible, while automatically preventing steam leakage to the greatest extent. There are many types of traps, each with different properties.

When choosing a trap, you should first choose its characteristics to meet the optimal operation of the steam heating equipment, and then consider other objective conditions, so that the choice of the trap you need is correct and effective.

Float linkage steam traps.

Shown in the diagram below is a simple float linkage steam trap.

The condensate enters the valve body from the inlet, and the water level in the valve rises, and the float also rises. The discharge port is connected to the float by the float rod "C", and as the condensate increases, the float rises, and the trap gradually opens. The opening of the valve is adjusted according to the condensate level in the valve and can continuously discharge any load of condensate within the maximum condensate displacement.

When the trap is cold, the valve "f" is fully open, and the air is easily discharged during the start-up phase. When the vapor enters the trap, the temperature rises, the device "E" expands, and the valve "F" is pushed to the seat "G", and the steam cannot leak. The air entering the valve during the operation phase collects at the top of the valve, and due to the low temperature of the air, the device "E" shrinks and the air is discharged.

Traps are mainly used for condensate drainage in steam pipes, and they are able to drain water without venting. Save energy.

You can buy a copy of Steam Traps and check it out!

Traps can be divided into mechanical, thermodynamic and thermostatic types. All three are self-actuated valves that do not require external force to open and close.

Mechanical steam traps work by taking advantage of the difference in density between water and steam. Thermodynamic traps rely on the phase difference between water and steam. Thermostatic steam traps operate by sensing the temperature of the medium.

The main function of the steam trap is to drain the steam and block the steam, generally there are mainly steam traps and air traps.

As far as steam traps are concerned, they can be divided into mechanical, thermostatic and thermodynamic according to the different working principles and structures. The mechanical type is mainly based on the specific gravity difference between steam and condensate, the thermostatic type is mainly based on the temperature difference between steam and condensate, and the thermodynamic type is mainly based on the difference in flow velocity and thermodynamic and fluid characteristics of steam and condensate. The main types are inverted bucket type, float type, temperature control type, membrane box type, disc type, etc.

The length of the valve structure is the distance between the two end faces!

The length between the horizontal lines on both sides of the valve.

A straight-through valve is the distance between the inlet and the outlet.

According to the principle of buoyancy, the automatic free float® steam trap makes the float in the valve body rise and fall with the change of water level, so as to achieve the opening and closing of the valve, that is, the effect of draining and blocking steam.

The structural length of the valve is defined in GB T 12221-2005 "Structural Length of Metal Valves".

3 Terminology. Through way type of valves face to face, end to end, center to facecenter to end dimensions

The distance between the two perpendicular plane of the valve axis at the end of the valve body channel.

Angle type of valves face to face,end to end,center to facecenter to end dimensions

The distance between the plane perpendicular to the axis at one end of the valve scale height channel and the axis of the other terminal of the valve body.

Wafer Type Valves

The structural length of the valve with a fixed sealing structure is clamped by the Chang Cheng pipeline flange, and its structural length refers to the distance between the two contact surfaces of the valve body channel terminal and the pipeline flange.

The structural length of the valve is defined in GB T 12221-2005 "Structural Length of Metal Valves".

3 Terminology. Through way type of valves face to face, end to end, center to facecenter to end dimensions

The distance between the two perpendicular plane of the valve axis at the end of the valve body channel.

Angle type of valves face to face,end to end,center to facecenter to end dimensions

The distance between a plane perpendicular to the axis at one end of the body channel and the axis of the other end of the body.

Wafer Type Valves

The structural length of a valve clamping a fixed sealing structure by a pipe flange refers to the distance between the two contact surfaces of the valve body channel terminal and the pipeline flange.

It is the valve length, height, bore diameter, etc.