Freezing
Freezing
As one of the common use cases in the industrial field, refrigeration is often combined with multiple processes. Excellent refrigeration-related components can provide confidence in maintaining working actions in extremely low temperature environments.
Reliability and durability are critical in industrial environments. Industrial frozen products need to undergo strict quality control and testing to ensure that they can operate under harsh conditions for a long time without being affected.
Whether facing a high-load production line or extreme temperature changes, it can run stably to ensure production efficiency and quality.
A. Limitations of solenoid valves for refrigeration:
In many refrigeration systems that require solenoid valves, pipe damage often occurs, especially in systems with relatively long pipelines. These damages typically occur at the bend between the solenoid valve and the expansion valve, often during the system's startup.
To understand this issue, let's start with the principle, as shown in diagram (a). The main purpose of the pump-down process is to collect refrigerant on the high-pressure side during shutdown, preventing liquid refrigerant accumulation in the evaporator when the system equalizes pressure. When the compressor suddenly starts, the influx of liquid refrigerant causes hydraulic compression, leading to damage.
During the pump-down process, the solenoid valve closes, and the compressor continues to run, collecting refrigerant from the low-pressure side to the high-pressure side. The system shuts down only after refrigerant collection is completed.
At this point, the solenoid valve and compressor act as obstacles, keeping the refrigerant on the high-pressure side, creating a vacuum state in the liquid line. When the system starts running, and the solenoid valve opens, liquid refrigerant rushes into the previously vacuumed liquid line. However, the expansion valve has a limited opening, resulting in a sudden blockage, generating significant impact force.
Therefore, after the solenoid valve opens, the liquid line bears substantial force, especially at the bends. These impact vibrations can cause damage to the weakest point of the pipe, such as welded bends, leading to refrigerant leaks.
The solution is to shorten the distance between the expansion valve and the solenoid valve. The optimal distance between the expansion valve and the solenoid valve should be within approximately 20 centimeters. This will reduce the acceleration path of the liquid refrigerant and subsequently lessen the impact force.
schematic a
schematic b
B. How to choose your suitable pipeline products:
You can select based on the following key factors:
1. Functional Requirements: First, clarify the functionalities your industrial refrigeration product needs, such as temperature range, cooling speed, energy efficiency, etc. Determining the functional requirements can help narrow down your choices.
2. Quality and Reliability: Ensure that the chosen industrial refrigeration product has good quality and reliability. Inquire about the reputation of the product's manufacturer and supplier, and understand their manufacturing processes and quality control measures. Additionally, you can check reviews and opinions from other customers to ascertain the product's reliability and durability.
3. Safety and Compliance: Ensure that the chosen industrial refrigeration product meets relevant safety standards and regulatory requirements. For example, you can check if the product has obtained international certifications such as CE mark, UL certification, etc., to ensure its safety and compliance.
4. After-sales Service and Technical Support: Understand the after-sales service and technical support provided by the product supplier. Ensure that you can receive timely and professional support when you need maintenance, servicing, or technical assistance.
C. The pipeline products we provide:
Solenoid valve for refrigeration
Ammonia Tube Fittings
Solenoid valve for refrigeration
Welded refrigeration solenoid valve
For low-temperature valves and pipeline components, our main offerings are Parker products, supplemented by the G.S.R series.
The Parker and G.S.R refrigeration series are highly mature and reliable products, and they have been selected by many customers for long-term use in various industries. In addition to the advantage of product stability, we have established a strong trust relationship through our cooperation with these excellent manufacturers, enabling us to promptly and effectively respond to customer needs.
D. If the product you need is not listed above:
The types of products we provide focus on industrial solenoid valves and related applications around them.
If you do not see any products that can deal with your actual situation in the above pictures and articles, you can contact us to ask if there are related products.