If so, here you will get the right guide. Let’s get started. In recent years, valve use has become common with the progress of modern technology. The demand for high-temperature valves increased in different engineering processes.
While choosing a high-temperature valve in a chlorine environment, you must consider the following factors. The material from which the valve is made up, its design, and up to what temperature it can work efficaciously. You should also keep in mind the potential threat and chloride ion corrosion a valve can face. High-temperature valves are often used in chemical, power, petrochemical, and other industries. The long time uses of high temperatures will impact on physical effects of materials. Before selecting extreme temperature valves, we need to focus on temperature or factors.
Chlorine is used in the production of polyvinyl chloride for water treatment. Chlorine acts in refrigeration, allowing it to cool homes, vehicles, and food.
What are the most common types of high-temperature valves?
The working temperature of the valve is t> 450℃, called a high-temperature valve. The operating temperature of the valve is uniform with the valve.
Increased-Temperature valves are seen in chemical, fertilizer, petrochemical, electric power, and other industries. According to the limits of the material carbon steel, and alloy grades, select. Bronze, for instance, cannot cross 550F, thus not considered high temperature.
Due to the difference in the thermal increase of the material, the working is different. To lower the bonding among the parts, you need to increase the working gap among the part of the valve. The increase in the hole depends on the stress and thermal expansion coefficient.
The high temperature will affect the connection in the valve seat to the loss of the valve parts. According to the conditions, some measures should be taken during sealing and design. The high temperature will influence the physical material, hardness, plasticity, elastic modulus, etc.
High-Temperature Valve Types
High-temperature valves include ball valves, gate valves, stop valves, ball valves, & butterfly valves. Globe valves, ball valves, gate valves, and butterfly valves are often used. Let’s take a look at the types of extreme temperature values.
Ball Valves for High-Temperature Applications
For stop valve applications, the Ball valves are cost-effective with high temperatures. The high temperature for ball valves should 400°F. The seats are the most vulnerable piece of the ball valve. Metal-seated ball valves are specified at temperatures greater than 750°F.
Small parts within the valve assembly must be capable of resisting high stresses. The valve stem and ball valve are subject to the high torque needed to actuate the valve. So the stem should make from a corrosion-resistant material that supports high-yield strength. High-Temperature valves are the best choice for the industries and most demanding applications.
Butterfly Valve for High Temperature
A butterfly valve is a high-temperature valve that can regulate or isolate flow. The closing system is the disc, which sits in the center of the valve body. Unlike a ball valve, the disc of the butterfly valve is present in the flow, which will produce a pressure drop.
A high-temperature valve works by rotating the closed disc 90° will open the valve and vice versa. They can also extend to throttle flow. This can be done, but the throttling flow is more precise when used with an actuator. High-temperature butterfly valves provide a lightweight and maintenance-free solution to high-pressure applications.
Bellows Seal Valves as High Temperature
The bellow valve also uses in a high-temperature environment. On all kinds of bellow seal valves, the threads on the stem should be cleaned with grease, if possible. It is suggested that preventive keeping should be carried out after some months. The keeping has great importance when the valve is used for high-temperature applications.
What Factors Should Be When Choosing High-Temperature Valve In A Chlorine Environment?
There are many uses of chlorine in different systems or sciences. It kills dangerous bacteria in drinking water and makes it safe. Chlorine is used to make textiles, paper, insecticides, medicines, and solvents.
Do you know which model offers the highest safety, durability, and reliability level? There are many models and brands of chlorine valves today in the market. The number of brands or models can make your buying decision challenging. But in this guide, here are some tips to help you select suitable chlorine valves. So you can get the correct value out of your investment.
Construction and Material of A Chlorine Valve
The body of the valve identifies the quality of your chlorine valves. For good quality, you will need to select a body made from forgings, WCB Grade castings and seals, and TFE.
Chlorine is often toxic and reactive and can cause harm to the respiratory organs. Chlorine also has a high growth rate, so the quality of the media. When working with chlorine, you should select the right media to avoid any safety issues.
As such, you should want to choose valves constructed highest quality materials to offer the best safety. Most industry experts suggest that ball valves avoid the effects of chlorine.
Design of a Chlorine Valve
The main thing while selecting a valve is the design. The design affects the efficiency and performance of your chlorine valves. The best design uses the best packing rings and allows you to manage the backflow of chlorine. Also, you should consider a compact design with enough body cavities or seals. These characteristics enhance the functionality and efficiency value of your chlorine valves.
The main reason is that high-temperature control is an issue and becomes difficult to cut off. The main image of this problem is the cut-off problems caused by high-temperature expansion. High-temperature valve has good performance, weld ability, and sound absorption impact. The more uses high-temperature butterfly, ball, and high-temperature gate valves. So, check the temperature of your system before considering the valve.
Choice of Sealing Method
It is tough to cut under high-temperature situations. Many conventional high-performance sealing methods are not helpful such as elastic metal materials. The soft sealing method of a special composite graphite seat can be used within 500℃ temperature. When a modified temperature is under 500℃ or higher, the high-temperature control valve can adopt the metal-to-metal hard seal method.
Manufacturing Facility & Technology
Chlorine valves are often made from a tremendous constructing material that offers quality. You will want to select chlorine valves that will provide higher-quality products.
Modern controls, such as infrared thermal imaging and helium leak checking, are essential. Because they help check for the safety and quality of your chlorine values. You will want to choose chlorine valves that create a controlled, clean environment.
Extra Tips for Choosing a Chlorine Valve
The other factors you need to care about are the pressure ratings of the chlorine valves. Always ask to talk about the dimensions of valves that fulfill your requirements.
By following the above factors, you will find the best quality valves.
Can The Bellow Glove Valve Be Used In A Chlorine Environment?
The bellows globe valve lowers the stress variation caused by flow changes. Improved streamlined distribution and reduced noise. The bellows globe valve is suitable for volatile, explosive, toxic fluid. This also uses in high-temperature heat transfer oil, liquid ammonia, and other media.
What are the main problems usually involved in high-temperature control valves?
There are several issues occur due to the failure of the high-temperature valve. The heating increase causes the seat guide and the rotary disc rotation. At raised temperatures, the slime of material causes the property of a material to reduce.
How do you choose the body’s material and trim from thermal strength considerations?
- The impact of temperature on the material’s mechanical strength must be above 450°C.
- For example, in a boiler system and the high-temperature state of a hot bypass system. Thus, materials must be used that are more resistant to high temperatures.
- For events above 538 °C, the body is usually made of chrome-molybdenum alloy steel.
- For the highest temperature stainless steel use, the carbon material must control.
- For higher temperatures, it tells us to use non-metallic heat-resistant materials. High-temperature alloys for engine combustion chambers, used for 1000 °C.
From the view of thermal expansion and contraction, how to prevent leakage?
Combined seat seal welding can use to prevent leakage. When the temperature becomes high, the seat causes leakage. The sealing surface is connected to the valve body and can erode the thread, causing a risk of the seat falling. In the event of such a failure, the valve seat should weld to prevent loosening and to fall off.
In all above, we have described how to select a valve for high temperature. You should keep in mind some factors before buying a valve. Many valves, like ball and gate valves, are used for high temperatures. We hope you understand this guide; contact us if you have any questions.