Professional Cryogenic Valve Manufacturer
●Various sizes and shapes allow them to function under different pressure ranges.
●Both manually and automatically operated.
●Superior quality.
●They are designed to transport and store cryogenic gases safely and efficiently.
●Designed to be used in freezing temperatures.
●Durable wear resistance.
●Fatigue-related failures of parts are delayed.
●Enhances the life and performance of components.
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BCST your Expert Cryogenic Valve Manufacturer
BCST cryogenic valves are designed to be used in freezing applications. They are used primarily by companies that deal with Liquefied Natural Gas (LNG) or Compressed Natural Gas (CNG). Cryogenic valves transport and store gases such as cryogenics safely and efficiently.
Cryogenic valves differentiate from other standard valves in the modern market. They can be fully functional in temperatures as low as -320 degrees Fahrenheit (-196 degrees Celcius) and at pressure ratings as high as 750 psi. BCST Cryogenic valves are available in various shapes and sizes to be able to function under different pressure ranges. Commonly used cryogenic valves are ball valves, butterfly valves, solenoid valves, and relief valves. Users can operate the cryogenic valves manually or automatically (needed in large systems).
BCST your One-Stop Cryogenic Valve Solution
BCST is a globally recognized China-based cryogenic valves supplier and manufacturer. You can visit our website at www.bcstgroup.com to understand more about our products.
BCST your BEST Cryogenic Valves Solution Supplier
BCST is a professional manufacturer with 22 years of experience in the production and exporting of cryogenic valves. BCST is a registered global brand that specializes in inflow fluid control and measurement solutions. Each cryogenic valve is tested and collaborated by our automatic production line providing a complete test certificate to ensure the quality of the product.
We provide a one-stop solution to the dimension and control of inflow. BCST has cooperated with transnational brands like Rotork, Siemens, ABB, and China National Petroleum Corporation. Our products are exported to over 100 countries worldwide.
BCST has enough raw materials in stock and professional technical staff that can quickly realize your unique requirements. In addition, BCST has over 20 years of product history and ten years of export experience. BCST gives you the best result for cryogenic valves.
If you have any questions, please send us an inquiry.
BCST Cryogenic Valve Quality Control
- Technical software caculation
- Technical team meeting
- CAD drawing confirmation
Assembly
- Installation
- Calibration
- Chemical Analysis
- Mechanical Propery
- dimension Checks
- Visual Checks
- Non-destruction Examination
Hydrostatic Test
- Shell test
- Sealing test
- Leakage test
- Air test
- Function test
- CNC machining
- Visual checks
- Dimensional checks
- Liquid penetration test
Outlook Treatment
- Surface Polish
- Painting
- Visual inspection
- Thickness checks
- Visual checks
- Liquid penetration
- Test
- Hardness test
- Lapping
- Dimensional checks
Packing
- Marking
- Exported wooden box
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BCST Cryogenic Valve Application
Cryogenic Valve -FAQ
What are the design requirements and standards for selecting the materials for the cryogenic valve?
Depending on the conditions, the following are the design requirements for the cryogenic valve.
Requirements for designing the cryogenic valve:
The working of the cryogenic valve is for a more extended period along with the cryogenic medium in low temperature. You cannot make the cryogenic valve the source of heat in the cryogenic system because the flowing heat can decrease the efficiency of the cryogenic valve. There are so many fluids flowing inside the cryogenic valve at similar timings, and it starts evaporating quickly. It causes an unusual increase in the pressure of the cryogenic valve that can be dangerous. The cryogenic medium doesn’t impact the handwheel and sealing progress on the packing of the cryogenic valve. All the parts of the cryogenic valve are in contact directly with the medium. There is no possibility of lubricating them, so it is important to accept such a structure to avoid damage.
Materials for the body of cryogenic valve:
You need to think about metal for the body of the cryogenic valve. Aluminium is the right choice during the selection of body materials of the cryogenic valve. It doesn’t become fragile at low temperatures. But, the resistance is low. That’s why Aluminum is not suitable for all types of applications. You can only use it for a cryogenic valve with a small diameter whose pressure is low. The materials of the cryogenic valve need assurance, particularly regarding the effect of the strength. To stop any breakage in the cryogenic valve, all the components of the cryogenic valve must have the ability to work under conditions of low temperature. Nickel can perform well under the temperature of -192 degrees Celsius. An alloy of Aluminum and Bronze is also appropriate for working temperatures less than -273 degrees Celsius and delivers good performance in these circumstances.
Other factors for consideration:
You also need to consider the minimum working temperature of the cryogenic valve. It is essential for the materials of the moving parts must keep working under low temperatures, particularly the strength and stability of microstructures. Without any lubrication of the oil, the cryogenic valve needs to be resistant to corrosion. The cryogenic valve’s performance in terms of welding needs to be considered.
What are the factors to consider while using the cryogenic valve?
Pressure:
The accumulation of cryogenic valve is essential while using it on a daily basis. The pressure arises from the formation of heat by the surroundings and consequently forms the vapour. Here is the requirement of unique consideration in designing the cryogenic valve to permit the building up of the pressure.
Temperature:
The variations in the temperature at a high level have an impact on the labour force and application. Every part of the cryogenic valve starts expanding and relaxing at a different speed. It happens because of the variations in the composition of the materials. It depends on how much cryogenic valve is exposed to the environment. It is the main reason for insulating the pipes and cryogenic valve.
Functionality:
You might face challenges while using the cryogenic valve if the temperature is zero degrees Celsius. The connection of the cryogenic valve is with the pipeline along with the liquid gas towards the environment. It results in a temperature difference of approximately 300 degrees Celsius between the surroundings and the pipeline.
Sealing:
It is suitable to use the plastics to seal the stem and bring it into an area where there is an average temperature. It shows that the sealant of the stem must not be near to the fluid. The bonnet is similar to the pipe. If there is a rise in the fluid, then the pipe warms up from the surrounding temperature. Whenever the fluid is near the sealant, here is the ambient temperature. The bonnet stops the handle from freezing and avoids any actuation.
Efficiency:
The temperature difference is from the generation of the heat flowing from the hot area to the cold one. It is the incorrect functionality of the cryogenic valve and causes a reduction in efficiency. There is a specific concern if the ice starts to form in the hot area. Metallic sealing is essential to deliver high-performance from the stem and keep working in opposite directions.
What are the features of a cryogenic valve?
- The weight of the cryogenic valve needs to be light, so the cryogenic valve is easy to cool down from the ambient temperature to the cryogenic surroundings.
- The conductivity of lightweight cryogenic valves is low, which is helpful in the reduction of heat production compared to heavy constructions.
- The configurations of weld and flange connections are available in the pipe connections of the cryogenic environment. As a recommendation, it is better to use the welding valves.
- Always assemble the cryogenic valve in a clean and tidy room and need to be free from any lubricant. You can use lubricants in a cold environment. Whenever you purchase the cryogenic valve, document all the cleaning procedures, collect for the verification and keep following all the steps while assembling the cryogenic valve.
Why there are long stems in the cryogenic valve?
Mostly, the cryogenic valve design is for liquid natural gas, oxygen, methane, and ammonia applications. The bonnets extend in the cryogenic valve, so the cryogenic valve’s sealing stem is far from the source of cold temperature. The stem is helpful for two reasons:
- The sealing stem of the cryogenic valve has a high temperature
- There is an additional space to facilitate the insulation between the handwheel and pipeline of the cryogenic valve.
Where can you use the cryogenic valve?
Following are the areas of using a cryogenic valve, or you can say applications of a cryogenic valve:
- Liquefication of the plants for LNG
- Facilities of storage in aerospace
- Terminals of LNG
- Plants of petrochemical and chemical
- Systems of transporting LNG
- Research laboratories
- Industries of food and beverages
- Plants for producing the steel
- Plants for separating the air
- Cryogenic carbon dioxide for storage in the tank and car
Tank for storing the helium
How do you overcome the hurdles while using the high-pressure cryogenic valve?
There are several high-level challenges during the involvement of manufacturing, designing, and testing the cryogenic valve in specific cryogenic circumstances. Below are a detailed description regarding all the complexities and how to resolve them while using the cryogenic valve.
Designing of the cryogenic valve in such a way to handle pressure at an extreme level and cryogenic temperature:
The sealing level under high-pressure conditions needs a high-pressure cryogenic valve. For this condition, the efficiency of the cryogenic valve is significant, and the tightness of the sealing under both high and low pressure. The high-pressure cryogenic valve depends on the floating ball technology to bring reliability. There is also an integration of the spring loading on the seat to compensate for the pressure changes at extreme levels. It also has the capability of completely sealing under these conditions. Make sure that the cryogenic valve works at an optimum level, complete sealing, and fix the value of the torque whose temperature range is from 30 degrees Celsius to -196 degrees Celsius. You might face these issues while transporting the bulk LNG so use the small size cryogenic valve for delivering highly-efficient solutions. It helps in excelling wherever is the requirement of solutions with low-torque in the natural gas industry.
Testing of the cryogenic valve in the stimulating conditions
One more challenge is to test the cryogenic valve as it has to be under controlling and stimulating conditions. For receiving high-quality solutions, laboratories perform all the testing strictly but can also exceed the standard. It is better to follow suitable cryogenic standards for testing the cryogenic valve. Submerge the whole cryogenic valve in the liquid nitrogen and stabilize the temperature to -196 degrees Celsius. To check any leakage in the cryogenic valve or its casing, the flowmeter helps test the internal lining of the sealing that needs to be within the range of the maximum levels mentioned in the standard.
Additionally, the testing of the working torque is at the minimum temperature to receive assurance regarding the design fulfilment and actuator’s compatibility whenever in use. Performance of the inline testing is from the liquid nitrogen and examining the impact on the torque and sealing of cryogenic valve whenever the materials start contracting. You need to do testing frequently on different types of cryogenic valves to improve the sealing and stability in the torques. It is the better approach to follow all the standards and safety precautions to increase the lifespan of the cryogenic valve.
How to select the suitable cryogenic valve for your application?
The use of the cryogenic valve in the industrial sector increases day by day, like natural gas or petroleum. You can say that the materials working under a low temperature can be explosive or flammable. It is better to follow some particular requirements for the safe use of the cryogenic valve. To consider this factor, the cryogenic valve has a long stem that helps reduce the heat transferring from outside and coming inside the device. One more element that you need to assess is the design of the bonnet with a long neck. Its relation is with the thermal conductivity of the particular material and area for the heat dissipation. You can calculate the heat dissipation coefficient on the surface by using the experimental methodology. Considering the materials, the manufacturers of the cryogenic valve always consider the body of the cryogenic valve can resist according to the changes in the temperature. It also includes the possibility of moving, expanding, contracting generation, and doesn’t deform. The most suitable material is ferritic stainless steel when the temperature is more than 100 degrees Celsius and uses austenitic stainless steel when the temperature is low. On the other side, you can use the alloys of copper or Aluminum while using the cryogenic valve of small diameter and low pressure.
How to make the right choice for the sealing of cryogenic valve?
Here are the details regarding the seal’s selection, the cryogenic valve’s performance, and its design criteria. Many common mistakes arise in the seal, creating the cost of money, operating time, and market share. There is also a discussion about hybrid technology to increase the life of the cryogenic valve.
The important components:
The primary area for consideration while designing the seals of the cryogenic valve is geometry. Mostly, there is a thin sealing as the recommendation on the outer diameter of the seal to increase the flexibility. You can fix the ring for locking and decrease the impact of shrinking to pull it away from the seal. The materials for the seal of the cryogenic valve are the foundation and very important for all the processes. Polytetrafluoroethylene and a variety of polymers, including polyimide, are the suggestions for the jackets of the seal. They are suitable because of compatibility with the chemicals produces friction at a low level and is resistant to extrusion. It also provides proper sealing that is effective in a more extensive range of temperatures. The main component of an effective seal of the cryogenic valve is a spring-energizer for exerting the force constantly. Its purpose is to prevent the plastic ring from shrinking. A similar force is tightening the plastic ring even when the temperature is low, or there is any irregularity in the cryogenic valve. The metallic sealing is not a good selection for the seal as it isn’t as beneficial as polymers. It can cause wearing and result in compression. All the metal seals don’t behave properly whenever there are changes in the environment. There is no effectiveness in the friction from metal-to-metal sealings.
The hybrid solution:
Recently, the emerging component in the sealing of cryogenic valves is a hybrid-energizer seal. This particular technology facilitates the benefits of physical properties. It also resolves the issues that might arise in cryogenic circumstances. During the development process, the hybrid energizer exerts the force on the seal to tighten and handle the distributive load without causing any damage to the lip of the seal. It is easy to maintain the seal under low pressure and high-temperature conditions. The testing of the hybrid energizer shows improvement in the solutions regarding the sealing.
How is the working cryogenic valve?
Naturally, the cryogenic valve is in the closed area to keep the cryogenic gasses or other media safe and secure. Primarily, the designing of the cryogenic valve to manage the high pressure that pushes the cryogenic valve in the opening position. It permits the gas or any other medium to smoothly flow through the cryogenic valve. The opening of the flow keeps continuing until and unless there is a reduction in the pressure. It is the point where there is a swing, and sealing starts with the metal. Also, shut-off with bubble-tight to stop any leakages. The cryogenic valve is extremely sensitive, and leakage from any area can cause damage while transforming the gases with standard temperatures into the cryogen.