How to replace your solenoid valve?
Mar 04, 2011 · In this article we will take a look at another standard component of commercial refrigeration systems: the solenoid valve. In almost every dry-expansion refrigeration system above a certain capacity, solenoid valves are used mainly in the liquid line. This is why we discuss this topic in some detail in this Fitters Notes article. Construction
What is a refrigerant solenoid valve?
Jan 11, 2020 · A solenoid valve is an electromechanical valve frequently used to control the flow of liquid or gas. Solenoid valves are found in many applications and are commonly used in refrigeration and air conditioning systems. Their function is …
Does a solenoid valve leak refrigerant?
Castel solenoid valve is a type of diaphragm solenoid valve, as an automatic control part in the refrigeration system, it uses to control the pass or stop of refrigerants. It is popular in refrigeration compressor condensing units, central air conditioning, bus air conditioning, and other freezing or cold storage system.
What is the function of the solenoid valve?
Solenoid valves play an important role within refrigeration and air conditioning systems, controlling the flow of refrigerants. Though their base function – turning the refrigerant flow on and off – is quite simple, this function is key to ensuring system performance. Understanding how solenoid valves work increases the likelihood that contractors
Why is a solenoid valve used in a compressor?
The solenoid valve is used in the refrigeration system to prevent the refrigerating fluid from the high-voltage part from entering the evaporator when the compressor stops. And it also avoids an excessively high low-pressure when the compressor is started next time so as to prevent compressor liquid hammer.
What material should be used for solenoid valves?
2. Selection of the solenoid valve body materials - brass, stainles steel or plastic, should take the pipeline medium nature into consideration. The solenoid valve which is applicable to the medium in the pipeline shall be chosen, and its working voltage should be in line with the power voltage.
Can a solenoid valve be applied to a water pipeline?
The solenoid valve at different working positions should adopt different types. For example, the solenoid valve applied to the refrigerating pipeline should not be applied to water pipelines, for the water will result in scale formation and leave solid impurities. Consequently, the balance hole on the solenoid valve membrane can be easily blocked.
Can a solenoid valve be fully sealed?
5. Since the air suction pipe of the solenoid valve applied to the refrigerating unit can easily form dews, the solenoid valve with the anti-dampness coil and fully sealed can be adopted. If the ambient temperature is lower than 40℃, the heat-insulating solenoid valve can be adopted.
How do refrigeration solenoid valves work?
All the refrigeration solenoid valve has to be installed correctly according to the flow direction (there will be an arrow to point the direction on the valve), then it will work smoothly .
What is a solenoid valve coil?
The solenoid valve coil is the indispensable accessory for the refrigeration solenoid valve. Only with the coil, the solenoid valve can work normally. And the coil only can be charged with electricity when installing on the valve, or it will be damaged.
How to install a valve coil on a refrigeration valve?
When you install the valve coil to the refrigeration solenoid valve, you need to install an o-ring between the valve body and coil, align the coil hole with the connecting steel, press the valve coil until you heard the closing sound, which means you install the coil on the right place.
What is an unloading solenoid valve?
The unloading solenoid valve is a type of solenoid valve that can be loaded by itself according to the heat load reducing situation , that will save energy for compressor and it has a longer working life. It is widely used for freezing, refrigeration, and air conditioning equipment.
What is an EVR3 valve?
EVR3 is the direct-acting type solenoid valve. When the stainless steel core part moves up because of the magnetic force from the solenoid valve coil, the refrigeration solenoid valve opens directly, which means the solenoid valve is able to work under the zero pressure difference.
How does a solenoid valve work?
Direct-Operating-normally-open solenoid valves work just the opposite way. In this when the solenoid is not activated spring pushes the plunger upward. That results in the flow of liquid. Whereas when the solenoid is energized, it pushes the plunger in the downward direction. That results in the closing of the valve.
What are solenoid valves used for?
Applications of Solenoid Valves 1 Automatic Washing machines and water filters utilize solenoid valves to control the flow of water. 2 Smart irrigation system utilizes solenoid valves to control the flow of water. 3 Solenoid valves are used in automated machines where two different liquids have to be mixed. 4 They are used in refrigeration and cooling systems to control the flow and direction of refrigerant flow. 5 Control the Flow of heated water for space heating.
What is the purpose of solenoid valves in washing machines?
Automatic Washing machines and water filters utilize solenoid valves to control the flow of water.
What is a closed solenoid valve?
Normally Closed Solenoid Valve. Normally closed valves are designed in such a way that the flow of liquid or gases is restricted when valves are not energized. In other words, when the solenoid is energized, the plunger opens the path of the flow of liquid. Normally closed valves have applications where most of the time flow of fluid is closed.
What is an open valve?
Normally open valves are designed in such a way that the flow of liquid or gases occurs when valves are not energized. In other words, when the solenoid is energized. Plunger blocks the path of the flow of liquid. Normally open valves have applications where most of the time flow of fluid is open.
What is direct operating valve?
Direct operating valves can be a normally closed or normally open type of solenoid valves. They are used for relatively small flow rate applications with no minimum pressure difference requirements. In other words, they can operate without any pressure difference as well.
What is a solenoid?
A solenoid consists of an electric coil and a movable ferromagnetic plunger. When an electric current passes through the coil, a magnetic field is created. This generated magnetic field exerts force and moves the plunger. When the electrical circuit is closed. Spring pushes the plunger to its initial position.