The introduction of the national standard globe valve, what is the model and specification of the gl

The national standard globe valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the valve disc, the resistance that needs to be overcome by the operating force is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium, and 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 top bend of the valve stem will occur.

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 shut-off valve model method has evolved from the international valve type standard.

The shut-off valve model represents:

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;

4) Globe valve structure: 1 straight-through, 2 Z-type straight-through, 3 tee, 4 angle type, 5 Y-type DC type, 6 balanced straight-through type, 7 balance angle.

formula, 8-needle type;

5) Globe valve seal material: F fluoroelastomer, H stainless steel, N 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) Globe 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.