Stainless steel valves are very suitable for use in corrosive pipelines and steam pipelines. They have the characteristics of corrosion resistance, high temperature resistance and high pressure resistance. They are generally used in corrosive pipelines in chemical plants, and pipelines in tap water or food plants. Carbon steel valves have no corrosion resistance and can only be used in non-corrosive medium pipelines such as steam, oil, water, etc. The cost of carbon steel valves is much lower than that of stainless steel, so generally no corrosive steam and other pipelines are used. Carbon steel is used, and stainless steel valves and other materials are used for corrosion. The following is a brief description of the application selection of stainless steel inter-valve and carbon steel gate valve by NSW Valve:
1 What is the reason for the leakage of carbon steel valve
Carbon steel gate valve is an industrial valve, which is widely used in petroleum, chemical, power station and other industries. It has the advantages of automation, easy operation, and long service life, but when using
During the process, due to the influence of itself or external factors, the carbon steel gate valve will leak. So, what is the reason for the leakage of carbon steel gate valve? The main points are as follows
common reasons.
1. The low processing precision of the wedge-shaped sealing ring leads to the internal leakage of the carbon steel gate valve. As long as the gate valve of the big brand is selected, the quality of the spare parts is generally better, so that the processing precision of the sealing ring will not be low.
1. Unstable production and operating conditions lead to internal leakage of the gate valve. The gate valve has relatively high requirements on the working environment. If the pressure and temperature environment are unstable and the change range is too large, the impact pressure on the sealing ring will be large, which is very easy. Deformation occurs, which ultimately leads to valve leakage.
3. The poor maintenance quality of the valve leads to the internal leakage of the gate valve. Some staff do not clean the sealing surface of the sealing ring when overhauling the valve. The existence of impurities will affect the operation of the valve. In the long run, the sealing surface will be scratched, which will lead to valve leakage.
4. The corrosion-shaped sealing ring of the shield causes the gate valve to leak for a long time. Under the influence of the medium, the sealing ring is easily corroded. If the corrosion reaches a certain level, the sealing ring will be reported.
, so that the valve leaks.
5. The valve body is defective. If the valve body has problems such as pores, slag inclusions, cracks, sand holes, etc., then the gate valve is prone to external leakage during use.
In short, the leakage of carbon steel gate valve is a relatively common problem. If there is leakage, it will endanger the safety of equipment and staff, so it is necessary to find out the cause and solve the problem in time.
4 How to choose a reliable stainless steel valve
Different from ordinary pneumatic ball valve, electric butterfly valve and other valve devices, the gate generation does not need to adjust the flow of dry fluid medium, but acts as full open and full cut off in the pipeline.
The switch gate is used. So there are so many stainless steel gate valves on the market, which product is more reliable? Characteristics of stainless steel gate valves
The stainless steel is made of stainless steel. The high-quality stainless steel and the surface treatment and quenching and tempering substitutes make the stainless steel a good anti-corrosion parts and good quality.
Abrasion, very durable. Therefore, the stainless steel gate valve is often used to control the flow of chemicals, and its good sealing and corrosion resistance make it not easy to be eroded and washed by the medium.
High temperature and high pressure man can also ensure good sealing performance. Which stainless steel gate valve is better
It is said that the stainless steel gate valve is just an industrial valve device, but it is actually a lot of attention. For example, if the selection of the gate valve is wrong, unforeseen hazards may occur, so do not
The stainless steel gate valve must be pressure tested before leaving the factory. When purchasing the valve, the customer should also determine the pressure range that the valve needs to withstand in advance to select the appropriate model and specification.
Regular manufacturers are more strict and accurate in pressure testing, so whether it is the quality of the valve, the service life, cost-effectiveness, or safety performance.
It is most important to choose a regular and reliable manufacturer, and the products of regular manufacturers (NSW Valve) are more secure.
Each customer has different requirements for dry stainless steel gate valves. In terms of price, quality and brand protection, different manufacturers sometimes have obvious differences. Therefore, the selection of manufacturers should consider various factors.
Post time: May-11-2022