Valve model and representation, valve type and model representation

Valve model and indication method

1.The first unit indicates the type of valve.

For example, Z represents the gate valve, D represents the butterfly valve, and H represents the check valve.

Wait; 2.The second unit represents the transmission mode.

For example, 9 means electric, 6 means pneumatic, 3 means worm gear drive, etc.;

3.The third unit represents the form of connection.

Such as 6 means welding, 4 means flange, 7 means clamping, etc.;

4.The fourth unit represents the structural form.

For example, the 1 of the butterfly valve represents the central vertical plate structure, and the 1 of the gate valve represents the single valve plate open rod structure, etc.;

5.The fifth unit indicates the code of the sealing surface and lining material.

For example, y represents cemented carbide.

X for rubber, h for stainless steel, etc.;

6.The sixth unit represents the nominal pressure.

Numeric value. With Arabic numerals.

Directly speaking, this value is 10 times the value in MPA units. Such as 10 means that the nominal pressure is;

7.The seventh unit represents the valve body material.

For example, Z represents gray iron, Q represents ductile iron, C represents carbon steel, P represents stainless steel, etc.

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.

There are many types of valves, among which the more common ones are: gate valves, globe valves, butterfly valves, ball valves, plug valves, check valves, pressure reducing valves, trap valves, etc.

The model of the valve is mainly composed of seven numbers or letters, the first letter indicates the valve type, the second number represents the driving mode, the third number represents the connection mode, the fourth number represents the structure type, the fifth number represents the nominal pressure, the sixth letter represents the sealing surface material, and the seventh letter represents the valve body material.

Valve refers to the pipeline accessories used to open and close pipelines, control the flow direction, and regulate and control the parameters of the conveyed medium. The valve is a control component in the pipeline fluid transportation system, which is used to change the channel section and the direction of medium flow, and has the functions of diversion, cut-off, throttling, check, diversion or overflow pressure relief.

The control of the valve can adopt a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electrohydraulic, pneumatic, spur gear, bevel gear drive, etc.

The model of the valve consists of seven units, for example: Z961Y-100I DN150.

The first unit represents the type of valve, such as Z for gate valve, A for safety valve, D for butterfly valve.

The second unit represents the transmission mode, such as 9 means electric, 6 means pneumatic, 7 means hydraulic.

The third unit represents the connection form, such as 6 represents welding, 4 represents flange.

The fourth unit, representing the structural form, such as 1 represents a single ram.

The fifth unit represents the code of the sealing surface and lining material, such as Y for cemented carbide and X for rubber.

The sixth unit, which represents the nominal pressure value, is directly expressed in Arabic numerals, which is 10 times the value in the MPA unit. For example, 100 means that the nominal pressure is 10MPa.

The seventh unit represents the valve body material, such as i represents chromium-molybdenum steel.

The parts and components of the valve must go through the following process before assembly:

1. According to the processing requirements, some parts need to be polished, and there can be no processing burrs on the surface.

2. All parts are degreased.

3. After the degreasing is completed, pickling passivation is carried out, and the cleaning agent does not contain phosphorus.

4. After pickling and purification, rinse with pure water, there can be no residue of chemicals, and carbon steel parts omit this step.

5. Wipe and dry each part with non-woven fabric, and do not retain the surface of the parts such as wire wool, or blow dry with clean nitrogen.

6. Wipe each part with non-woven fabric or precision filter paper dipped in pure alcohol until there is no dirty color.

The types of valves can be divided into electric valves, pneumatic valves, hydraulic mesh doors, manual valves, etc. according to the driving mode. According to the material of the valve body, it can be divided into: cast iron valves, forged steel valves, cast steel, valves, stainless steel valves, copper valves, titanium valves, plastic valves, etc.

The valve model should usually indicate the valve type, drive mode, connection form, structural characteristics, nominal pressure, sealing surface material, valve body material and other elements.

Valve manufacturers generally use a unified numbering method, can not be used, each manufacturer can develop a numbering method according to their own needs.

The valve model representation method consists of seven units, which are used to represent the valve category, transmission mode, connection form, structural form, sealing surface or lining material, nominal pressure and valve body material.

The significance of the indication of each unit of the valve model.

The representation of the valve model consists of seven units:

The significance of each unit is as follows:

Unit 1 - Valve Type. The model of the valve is indicated by the Chinese pinyin letter, such as the commonly used valve model is: z - gate valve; j — globe valve; l — throttle valve; q — ball valve; d — butterfly valve; x — plug valve; h — check valve; a — safety valve; y — pressure reducing valve; s — Traps.

Note: For low temperatures (below 40C. Valves with low temperature (with heating jacket) and bellows should be preceded by the type codes "D", "B" and "W", respectively.

The second unit - the driving mode, with one Arabic numeral to indicate the driving mode of the valve, the code is indicated as follows:

0 electromagnetics; 1 Electromagnetic liquid; 2 Electricity and liquid; 3 turbines; 4 spur gears; 6 pneumatic; 7. Hydraulics, etc.

Note: This code is omitted for valves driven by handwheels, handles or wrenches, as well as safety valves, pressure reducing valves, and steam traps.

The third unit - the connection mode, with one Arabic numeral to indicate the connection form of the valve, the code is indicated as follows:

1 female thread; 2 male threads; 3 flanges (for spring safety valves only); 4. Flange (the code of single spring safety valve and other types of valves is only when the flange is connected); 5 flanges (for lever type safety valves only), 6 welded; 7 pairs of clamps; 8 clamps; 9 Ferrules.

Unit 4 – Structural Forms. One Arabic numeral is used to indicate the connection form of the valve, and the valve code is often used to indicate the following:

Gate valve: 1 open rod wedge single ram; 2. Open rod wedge double ram; 3. Open rod parallel single ram; 4. Open rod parallel double ram, etc.

Globe valve: 1 straight-through (cast); 2 Right Angle (Casting);

3 Straight-through (forged); 4. Right angle type (forging), etc.

Check Valve: 1 Straight-through lift; 2. Vertical lifting type; 3. Straight-through lifting type; 4. Single-lobe spin type; 5. Multi-petal rotary opening type, etc.

Pressure Reducing Valve: 1 Outer Spring Diaphragm Type; 2. Inner spring diaphragm type, etc.

Unit 5 - Valve seat sealing surface or lining material, which indicates the sealing ring material of the valve in Chinese pinyin letters.

Commonly used are: t copper; h Acid-resistant steel or stainless steel; y Tungsten carbide; l Aluminum alloy; x rubber; j Ebonite; p leather, etc.

Unit 6 – Nominal Pressure.

The nominal pressure is expressed directly as a pressure numerical value and is separated from the first five elements by a dash line. The nominal pressure of the valve is commonly used as 1, , , etc.

Unit 7 - Valve Body Material, which uses Chinese pinyin letters to represent the valve body material.

Commonly used are: z gray cast iron; c Carbon steel; l Aluminum alloy; t Copper alloys, etc. Note: For gray cast iron valves for PG or carbon steel valves for PG, this unit is omitted.

There are many types of valves. The state has a standard valve model representation method. JBT 308-2004 Valve Model Preparation Method。You can refer to this standard.