How can we determine whether the valve quality of a valve factory is up to standard?

The most important thing about the valve is to look at the seal, because the function of the valve is to switch, control, etc. Of course, it is not only the seal that determines the quality, but also the life of the valve, whether the operation is flexible, and the appearance are also part of the quality. In addition to sealing, followed by size, because the size of the valve connection is a national standard, and then look at the wall thickness, wall thickness as a hidden standard, although the wall thickness also has a national standard, but most of the wall thickness is not up to standard, this general purchaser will not be particularly required.

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.

First of all, check whether the appearance of the valve is flat and smooth. Cast valves have no sand holes and obvious defects. Forged valves check nominal pressure or pound level.

Secondly, check the material of the valve, that is, the material composition, which is very important, and the material is not up to standard when used on the device.

The last thing is to check whether the switch is sensitive and whether the signage is clear. Testing the pressure is the last step to be done.

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.

First of all, visually check the appearance of the valve, then check the material with a spectrometer, and then look at the hydraulic pressure to test whether there is leakage, etc.

The new valve is airtight and makes a sound when opened.

Valve inspection method:

1) Check the name of the manufacturer and the date of manufacture;

2) Check the product name and model;

3) Check the nominal pressure, nominal diameter, applicable medium and temperature;

4) The standard of the inspection basis, the inspection conclusion and the inspection date;

5) Check the factory number;

6) Signature of the inspector and the person in charge of the inspector. The nameplate should indicate the nominal pressure, nominal diameter, working temperature and working medium.

Appearance inspection, dimensional inspection, assembly inspection, dismantling inspection, pressure test inspection.

As an industrial product, the quality of the valve is the responsibility of the manufacturer. If you want to understand the detailed quality situation, you need to understand all aspects of raw materials entering the factory, product design, manufacturing and processing technology, purchased parts certificate, factory sealing and pressure test, and consult relevant original data.

It can also be considered to send a third-party laboratory with inspection and testing qualifications for testing, and the report issued should have a certain degree of credibility.

No matter how much acceptance, testing, and no matter what the conclusion of the report is, as long as there is a technical problem under normal working conditions, the manufacturer is obliged to be responsible for the quality of the valve during the warranty period, and cooperate with the relevant units to repair the valve outside the warranty period.

Many valves used in the factory have been suppressed every time they go out in the factory. It's basically all replaced, if there are really some bad ones. The odds are slim, though.

In addition to testing, it is to look at the scale of the field, certificates and so on.

What valves are you talking about, domestic valves? Or is there a natural gas valve for industrial valves?!