What is the standard size of a cast iron globe valve? Please, thank you

Gate valve is one of the commonly used shut-off valves, which is mainly used to connect or cut off the medium in the pipeline, and is not suitable for adjusting the flow rate of the medium. Gate valves are suitable for a wide range of pressure, temperature and diameter, especially for medium and large diameter pipelines. Keywords:

Valve, classification, definition 1. Gate valve Gate valve is one of the commonly used shut-off valves, which is mainly used to connect or cut off the medium in the pipeline, and is not suitable for adjusting the flow rate of the medium. Gate valves are suitable for a wide range of pressure, temperature and diameter, especially for medium and large diameter pipelines. Main Standards for Gate Valves GB12232-89 GB12234-89 GB 8464-87 GB 12232-89 GB 8464-87 Internal Thread Connection Gate Valve, Globe Valve, Ball Valve, Check Valve General Technical Conditions Internal thread connection gate valve, globe valve, ball valve, check valve Basic Dimensions Iron Gate Valve JB T53162-91 "Gate Valve Product Quality Classification" JB T5298-91 Steel Flat Gate Valve for Pipeline JB Z243-85 "Gate Valve Static Pressure Life Test Regulations" JB TQ648-88 "Iron Clamp Plate Gate Valve" JB T53200-94 "Iron Clamp Plate Gate Valve Product Quality Classification" JB T53242-94 "Steel Plate Gate Valve Product Quality Classification" 2. Globe valve and throttle valve Globe valve is a commonly used cut-off valve, which is mainly used to connect or cut off the medium in the pipeline, and is generally not used to regulate the flow.

The globe valve is suitable for a wide range of pressure and temperature, but is generally used for medium and small diameter pipes. Main Standards for Globe Valves GB12233-89 GB T587-93 GB T590-93 GB8464-87 "Internal Threaded Connection Gate Valve, Globe Valve, Ball Valve, Check Valve General Technical Conditions" Internal Threaded Connection Gate Valve, Globe Valve, Ball Valve, Check Valve Basic Dimensions Iron Globe Valve

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.

Shut-off valvesThe model size is 20. The globe valve, also known as the shut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from under the disc, the resistance that needs to be overcome by the operating force is the friction between the stem and the packing.

The thrust generated by the pressure of the medium, the force of closing the valve is greater than the force of opening the valve, so the diameter of the valve stem should be larger, otherwise the failure of the stem bending at the top will occur.

Introduction to valves

Valve is a device used to control the direction, pressure and flow of fluid in the fluid system, and is a device that makes the medium liquid, gas and powder flow or stop in the piping and equipment and can control its flow. 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.

Valves for fluid control, from the simplest shut-off valves to the most complex automatic control systems.

The various valves used in the are of various varieties and specifications, and the nominal diameter of the valve.

From tiny instrument valves to industrial pipeline valves with diameters of up to 10 meters. It can be used to control water, steam, oil, gas, mud, various corrosive media, and liquid metal.

and various types of fluids such as radioactive fluids.

Common globe valve models are: cast steel flange globe valve J41H-16C, stainless steel flange globe valve J41W-16P, stainless steel wire buckle globe valve J11W-16P, etc.

Caliber range DN25-DN300

Nominal pressure PN16 25 40 63

Operating temperature -29 425

Applicable medium: water, steam, oil, etc.

Body material: WCB stainless steel.

Applications: tap water, sewage, construction, petroleum, chemical industry, textile, electric power.

Shut-off valvesThe model specifications are different, for example, J41H is an open rod flangeCast steelShut-off valves

J stands for globe valve, 4 stands for flange, 1 stands for open rod, H stands for cast steel, and each symbol represents a device. According to the domestic valve model standard, the model of the globe valve is represented by the valve type, driving mode, connection method, structural form, sealing material, and valve body material code.

The function of the shut-off valve:

Its main function is to open or close the water, that is, to cut off the water source, but with the slow development and improvement of the shut-off valve, now it has also realized the role of regulation and throttling, cutting off is to control the flow of water entering with the closing valve, throttling is to seal by twisting the valve stem, apply pressure to the valve disc, and prevent the medium from entering through the gap.

Globe valve models are: J41H, J41W, J11W

Globe valve specifications.

Caliber range DN25-DN300

Nominal pressure PN16 25 40 63

Applicable temperature: -29 425

Applicable medium: water, steam, oil, etc.

Body material: WCB stainless steel.

Applications: tap water, sewage, construction, petroleum, chemical industry, textile, electric power.

The size of the globe valve is different for different pipe diameters and different pressures.

Cast iron can be divided into: 1, gray cast iron 2, white cast iron 3, malleable cast iron 4, ductile iron 5, compacted graphite cast iron 6, alloy cast iron.

Generally speaking, the cast iron gate valve and cast iron globe valve are ductile iron by default, referred to as ductile iron, which has higher strength, better toughness and plasticity than ordinary gray cast iron;

Cast steel is the steel used to cast castings. A type of cast alloy. Cast steel is divided into three categories: cast carbon steel, cast low alloy steel and cast special steel; Cast carbon steel.

Cast steel with carbon as the main alloying element and a small amount of other elements. The carbon content is less than the cast low carbon steel, the carbon content is the cast medium carbon steel, and the carbon content is greater than the cast high carbon steel. As the carbon content increases, the strength of cast carbon steel increases, and the hardness increases.

Judging from the above material characteristics, cast iron is stronger than cast steel, and the brittleness is greater than that of cast steel, and cast steel has better plasticity and toughness than cast iron, so cast iron is generally used in pipelines with relatively low pressure, and can only be applied to pipelines at room temperature, because the increase in pressure or temperature means that the valve will have a certain amount of trace deformation, which is unfavorable to cast iron valves, compared with cast iron valves, cast steel valves can be used in pipelines with relatively high pressure or temperature.

Cast iron globe valves and cast iron gate valves are mostly used in water pipelines, such as the valves we often see for transporting water pipelines, and the valves are sprayed with blue or black paint; Cast steel globe valves or gate valves are used in thermal pipelines, petrochemical pipelines, etc., and are generally sprayed gray.

Look at the paint color.

Currently, GB T26478 has regulations.

Cast iron is black.

Cast steel is gray.

Stainless steel is sky blue.

You can check it out.

Dear, I am glad to answer for you: What is the length of cast steel globe valve DN450: 450 valve is to say that the nominal diameter is 450mm, but there are many kinds of valves, butterfly valves, ball valves, check valves, globe valves, etc., the length of different types of valves is also different, to the same is that their nominal diameter is 450mm.

One is the unit of mass, the other is the unit of volume trillion segment, the density is required, mass = volume * density liter is the volume unit, 1 liter 1 cubic decimeter. The kilogram is a unit of mass. The conversion formula for the mass and volume of liquids like water, vapor oil, etc. is:

Mass, density, volume. When converting, it should be noted that the unit of density should be kilograms. So the standard size of a 450-liter valve is equivalent to 450 kilograms.

Forged steel globe valve selection standard.

1. The shut-off valve should be selected for continuous high temperature and high pressure medium pipelines or equipment. Such as thermal power plants, nuclear power plants, petrochemical equipment system software high temperature, high pressure pipelines. Potato dress.

2. On the forged steel globe valve pipeline, the thermal convection resistance demand is not tight. That is, the flow resistance is not much to consider the number of bucket stoves.

3. Small and medium-sized gate valves can be selected needle valves, instrument valves, sampling valves, vacuum pressure gauge valves, etc.

4. The flow rate of the forged steel globe valve is adjusted or the pressure is controlled, but the adjustment accuracy is low.

5. In the construction of large cities, on the power supply and heating pipe network, the pipeline with a relatively small nominal pulse can be selected as a cut-off, static balance valve or angle globe valve, such as a pipeline with a nominal pulse lower than 150mm.

The use of shut-off valve in our life is very extensive, so how about the stainless steel shut-off valve model, what are the stainless steel shut-off valve models, let's take a look at the stainless steel shut-off valve models.

What are the models of stainless steel globe valves.

U.S.-Japan standard globe valve: J41Y, J41W;

Bellows globe valve: WJ41H, WJ41W;

Stainless steel globe valve: J41F, J41H, J41W;

Cryogenic shut-off valve: DJ41H, DJ41Y, DJ41F;

Electric globe valve: J941F, J941H;

Welded globe valves: J61Y, J61W, J961Y, J961W;

Angle globe valves: J44H, J44W, J47H, J47W

Globe valve model compilation method.

Additional code for globe valve: W bellows, D low temperature, B insulation;

1) Globe valve category code: J means globe valve;

2) Globe valve transmission mode: manual without code, 5 bevel gears, 6 pneumatic, 9 electric;

3) Globe valve connection: 4 flange connection, 6 welding; Burying.

4) Globe valve structure: 1 straight-through, 2Z straight-through, 3-way, 4-angle, 5Y-type DC, 6-balanced straight-through, 7-balanced-angle, 8-needle type;

5) Globe valve seal material: F fluoroelastomer, H stainless steel, Nylon plastic, Y cemented carbide, M Monel alloy, W valve body direct processing;

6) The nominal pressure of the globe valve: 16 means that the pressure is 16 kilograms; 7) Cut-off valve body material: A titanium alloy, C carbon steel, I chromium molybdenum steel, P stainless steel 304, R stainless steel 316;

Such as: WJ41H-16C bellows globe valve, W bellows, J globe valve, 4 flanges, 1 straight-through, H stainless steel, 16 pressure 16 kg, C carbon steel.

Advantages of stainless steel valves:

1. Double sealing design (bellows + packing) If the bellows fails, the stem packing will also avoid leakage and meet international sealing standards. 2. Safe and environmentally friendly, no fluid loss, reduce energy loss, and improve the safety of factory equipment.

3. Long service life, reduce the number of maintenance and reduce operating costs.

4. The sturdy and durable bellows sealing design ensures zero leakage of the valve stem and provides maintenance-free conditions.

It is suitable for shut-off valve on the pipeline of heat transfer oil, toxic, flammable, permeable, polluted environment and radioactive fluid medium, and can also be used for adjustment, which is a high-quality product to create a leak-free factory.

The globe valve is an important component in the water pipe, what are the dimensions of the globe valve? What are its model specifications? What can a globe valve do? Don't worry, this is for you to give you a specific introduction.

1. What are the models and specifications of the globe valve?

1. If it is divided according to its driving mode, its specifications are manual and electric, including pneumatic mode, and the role of different driving methods is also different. If you choose a manual shut-off valve, it is generally operated in the pipeline, such as the boiler steam pipe or the transportation of chemical products above the water pipe, etc., and it will be safer to choose a manual water-saving valve.

2. If divided according to performance, the types of globe valves mainly include heat preservation, low temperature, high temperature, etc., and the functions are also different, such as the selection of low temperature globe valves, which is used to transport liquefied gas.

3. If it is divided according to the medium, there are mainly steam, oxygen, and corrosive liquids. Different types, choose different types of globe valves, if it is high temperature steam, you should choose the bellows sealed globe valve.

4. If it is divided according to the pressure specification, the globe valve has different specifications such as 16 kg, 25 kg, 40 kg, 64 kg, 100 kg, 160 kg and so on.

5. If it is divided according to its structural type, there is a three-way globe valve, which is more common, mainly used to change the direction of water flow and distribute water flow, and there is a DC globe valve.

Second, the role of the globe valve.

The biggest effect is to cut off the flow of water, of course, there is not only water here, but also some other liquids, and it can be suitable for places with frequent opening. Generally speaking, in the chemical production workshop, it is widely used, and it can play the role of sealing after closing, and there is also the function of lifting, which can be controlled by the valve stem to prevent leakage.

The above content analysis is the model specification of the globe valve, and according to different models, it has different functions, but it is basically to cut off the flow of the medium.