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An ammonia solenoid valve is an important automatic switch in industrial refrigeration systems. It uses electricity to safely start or stop the flow of ammonia, helping the system run efficiently and safely.      How does an Ammonia solenoid valve work?      The valve has a few main parts: the valve body, a wire coil, a metal plunger, and a spring.   Power ON: When the coil gets electricity, it becomes a magnet. This magnetic force pulls the plunger up, opening the valve and allowing ammonia to flow.   Power OFF: When the electricity is turned off, the magnetic force disappears. The spring then pushes the plunger back down, closing the valve and stopping the ammonia.   By turning the power on and off, the valve controls the flow automatically, often working with temperature or pressure controllers.        How to Choose an Ammonia solenoid valve?    When buying a solenoid valve for an ammonia system, remember these points:   Must be for Ammonia: The valve must be marked for use with ammonia (R717). The materials (like the body and seals) must resist ammonia corrosion.   Size & Connection: Choose the right valve size (like DN25, DN50) to match your pipe. Also, check the connection type (flanged or threaded).   Pressure Rating: The valve's maximum pressure must be higher than your system's working pressure.   Voltage: Make sure the coil voltage (e.g., AC220V, DC24V) matches your control panel's power supply.   Protection Level: For wet or dusty areas, choose a valve with a good protection rating (like IP65).   Type: Most are "Normally Closed" (opens when powered, closes when off).      How to install and Check:    Proper installation is key for safety and performance.   Installation Steps: Check the Nameplate: Before installing, confirm the valve is for ammonia and that the pressure and voltage ratings are correct. Clean the Pipes: Make sure the pipes are clean with no dirt or metal scraps. A filter before the valve is a good idea. Follow the Arrow: The valve body has a flow direction arrow. Install it in the correct direction. Mount Properly: Install it on a horizontal pipe. For flanged valves, tighten the bolts evenly. The coil should be facing upwards. Good Location: Place the valve where it's easy to access, with minimal vibration, and protected from water and high heat.   After Installation Checks:   Check for Leaks: After pressurizing the system, use soapy water or a leak detector to check all connection points for any ammonia bubbles. Test the Action: Turn the power on and off. You should hear a clear "click" sound, confirming the valve opens and closes properly. Monitor: During the first hours of operation, check if the valve gets unusually hot, vibrates, or makes strange noises.     The ammonia solenoid valve is a small but crucial part. Choosing the right one, installing it correctly, and checking it regularly are the best ways to prevent problems and ensure a long service life.  

Steam Iron Solenoid Valve   As the core actuator of the fluid control system, the steam solenoid valve plays a key role in steam distribution, thermal balance and process temperature control. It accurately adjusts the steam flow through electrical signals and is widely used in central air conditioning, industrial heat treatment, energy management and process production. High-quality steam solenoid valves must meet the three core requirements of high temperature tolerance, sealing reliability and response accuracy to adapt to the special physical properties of the steam medium. In this article, we mainly introduce the two solenoid valves 7000 and 9934.      Technology and Features      High temperature tolerance： Using VITON diaphragm seal (resistant to 150℃) Lightweight structure: Small size and light weight, suitable for miniaturized equipment (such as portable steam irons) Low maintenance cost: Self-compensating sealing technology reduces maintenance frequency and reduces downtime losses                Specification and Ordering Code    Model 7000 Port Size 1/4 '' Orifice Size 2mm, 3mm Working Medium Steam, Hot Water Operation Direct Acting Function 2Way Normally Closed Working Pressure 0 to 10 bar Body Material Brass Seal Material FKM Temperature -30~150℃ Voltage 12VDC, 24VDC, 24VAC, 110VAC, 220VAC     Model 9934 Port Size 1/4 '' Orifice Size 2mm, 3mm Working Medium Steam, Hot Water Operation Direct Acting Function 2Way Normally Closed Working Pressure 0 to 10 bar Body Material Brass Seal Material FKM Temperature -20~160℃ Voltage 12VDC, 24VDC, 24VAC, 110VAC, 220VAC        Application:    Widely used in high-temperature steam systems such as steam irons, industrial ironing equipment, dryers, etc., to achieve automatic temperature control and energy-saving operation       The steam iron solenoid valve is an electrical component that opens when current is applied to it. If the valve in your steam iron is playing up become faulty, look no further DOTEC are here to help. With this replacement fitted to your steam iron, you'll be back in action in no time.    

Refrigeration equipment core components   In refrigeration systems, solenoid valves, as key fluid control components, undertake important functions such as refrigerant on-off control, flow direction regulation and safety protection. Among them, Danfoss type and Castel type, as leading brands in the field of refrigeration valves worldwide, their products play a vital role in industrial refrigeration, commercial cold chain and special temperature control environments.      Danfoss Type Refrigeration Solenoid Valve    1. Technical features Direct acting (such as EVR 2/3): After power is turned on, the armature directly pulls the valve pad to open, supports zero pressure difference start (0 bar), and relies on inlet pressure and spring force to close. Servo type (such as EVR 6/22/25): The diaphragm or piston action is controlled by the pilot valve, and a minimum working pressure difference (0.05~0.2 bar) is required, which is suitable for high-pressure scenarios. The maximum working pressure is 45.2 bar (welding/bell mouth connection), and the flange connection is 32 bar. The medium temperature range is -40~105°C, and the defrosting condition can temporarily withstand 130°C. Suitable for perfluorinated refrigerants (such as R410A, R407C) and natural refrigerants (R290, R744, R1234ze, etc.), including flammable refrigerants. Supports bell mouth (≤5/8 inch), welding (≤2 1/8 inch) and flange connection. The welding model is equipped with an extended pipe, which does not require disassembly welding. Split structure, valve body and coil can be replaced separately, reducing maintenance costs. The coil is compatible with AC/DC power supply (preferably AC220V/DC24V), power consumption is 10~12W, and MOPD (maximum operating pressure difference) is up to 38 bar.   2. Select the type based on system parameters Low pressure difference scenario (＜0.04 MPa): select direct-acting type (EVR 2/3). High pressure difference/large flow scenario (≥0.04 MPa): select servo type (EVR 6/22), and the minimum pressure difference must be guaranteed. Normally closed type (NC): suitable for short-term opening scenarios; Normally open type (NO): used for long-term power-on systems.                Castel Type Refrigeration Solenoid Valve    Core structure and working mode Normal closed design: automatically closes when power is off to ensure zero leakage of the medium, suitable for safety-first scenarios (such as refrigerant control). Pilot valve drive mechanism: control the opening and closing of the main valve through the pilot valve, reduce energy consumption (coil power is only 8W), and support high pressure difference conditions (up to 31 bar). Wide temperature range compatibility: the valve body has a temperature range of -40℃ ~ +110℃, and can withstand 130℃ for a short time (such as hot gas defrosting conditions). The coil is made of insulating moisture-proof material, with a protection level of IP54 (dustproof and splashproof). Standard HM2/HM3 coil: voltage AC 220-230V/50-60Hz. No pressure difference starting capability: it can still open normally when the medium pressure difference is close to 0, solving the problem of low-pressure starting of the system. Hot plug of coil: replacing the coil does not require shutting down the system or draining the refrigerant, reducing downtime losses. Modular structure: The valve body and coil are designed separately, which supports separate replacement and reduces spare parts costs.   The HM2/HM3 series is an ideal choice for refrigeration and industrial flow control due to its advantages of no pressure differential start-up, wide temperature range compatibility and modular maintenance.   Key points to pay attention to when selecting:   Media and pressure: For high pressure differential, choose pilot valve type (such as HM3), and for low pressure/no pressure differential, choose direct acting type (such as HM2). Environmental adaptability: For high humidity, choose IP65 (HM3), and for room temperature, choose IP54 (HM2). Economical efficiency: Split design is preferred for frequent maintenance scenarios to reduce long-term costs        Expansion Valve    Technical features Throttling and pressure reduction: throttling high-pressure liquid refrigerant to low-temperature and low-pressure wet steam to create conditions for evaporation and heat absorption. Flow self-regulation: sensing the superheat at the evaporator outlet through the temperature sensing package, dynamically adjusting the opening, and matching the load change (the superheat range is usually 5~8℃). Balancing method Internal balance: compact structure, suitable for systems with small evaporator pressure drop (such as small air conditioners). External balance: sensing the evaporator outlet pressure through the balance pipe to solve the problem of insufficient liquid supply caused by large pressure drop (such as long pipeline cold storage).      Refrigeration Pressure Regulator    Technical features: Precise and stable pressure regulation: The core adopts a balanced bellows design, which significantly reduces the impact of inlet pressure fluctuations on the set pressure and ensures that the outlet pressure is highly stable and reliable. Wide adjustment range: The models cover a wide range of pressure settings and application requirements, suitable for multiple functions such as evaporation pressure regulation (EPR), condensing pressure regulation (CPR), suction pressure regulation (SPR) and hot gas defrost pressure control. Compact and efficient design: The structure is compact and light, and it is easy to install in refrigeration systems with limited space. Quick response: The design ensures sensitive response to system pressure changes and maintains system pressure stability.   Main applications:   Maintaining stable temperature in cold storage/display cabinets: Preventing evaporation pressure (temperature) from being too low due to load reduction or ambient temperature drop, avoiding temperature fluctuations and food frostbite, and reducing compressor start and stop.       Refrigeration components are the core of the system, and their selection directly determines energy efficiency and reliability. We can recommend suitable products for you based on your needs.      

Pulse Valve Accessories Maintenance and Selection Guide   In modern industrial dust removal systems, the pulse valve is known as the "heart" of the dust removal system. Every precise beat of the pulse valve determines the operating efficiency of the entire dust removal equipment. The efficient operation of this core component depends on the coordinated work of its key accessories - coils, armature and diaphragm kits.   These seemingly tiny components are actually the cornerstones for maintaining the long-term stable operation of the pulse valve. Their quality and maintenance status are directly related to the service life and operating cost of the dust removal system.      Solenoid Coil: The ''nervous system'' of pulse valves    As the control center of the pulse valve, the electromagnetic coil drives the opening and closing of the valve by receiving electrical signals. The high-quality coil adopts a fully sealed structure, reaches the IP65 protection level, and is effectively dustproof and waterproof. The coil supports multiple voltage configurations (DC24V/AC220V/AC110V) to meet the needs of different industrial scenarios.                Armature Assembly Pneumatic Precision Directors    These stainless steel assemblies govern airflow dynamics with micron-level tolerances:   Materials: 430FR stainless steel armatures, 300-series springs/push rods Flow Control: Precision orifices (Ø0.5-1.2mm) regulating pilot flow velocity Performance: <0.03s response time, direct correlation to valve sealing efficiency        Diaphragm Kits:    Converting pneumatic pressure into mechanical motion, diaphragms require material-specific engineering:   Material Temp Range Chemical Resistance Cycle Life Applications NBR (Nitrile) -10°C to 80°C Moderate 800k cycles General industrial FKM (Fluoroelastomer) -20°C to 200°C Excellent 1.5M+ cycles High-temp/corrosive   *Note: Dual-layer designs (elastomer + fabric reinforcement) enable >1 million cycles at 0.3-0.6 MPa.*        Maintenance & Replacement Protocol:    Failure Indicators Diaphragms: Reduced blowing force, pressure fluctuations, visible cracking (Replace: 12 months standard / 6-8 months high-cycle) Pilot Assemblies: >0.1s closure delay, air leakage, abnormal acoustics Coils: >15% resistance deviation, >40°C temperature rise, insulation degradation Critical Installations Diaphragm alignment: <0.3mm radial deviation Bolt torque: 3-5 N·m (cross-pattern sequence) Pilot cleaning: Isopropyl alcohol flush of Ø0.8mm orifice   Table: Fault Diagnosis Matrix   Symptom Faulty Component Root Cause Corrective Action Coil energized, no actuation Coil Insulation breakdown Replace coil; verify voltage stability Post-blow leakage Diaphragm Material fatigue/crack Install new kit; check air purity Delayed closure Armature Orifice blockage Ultrasonic clean assembly          Technical Specifications Guidelines:    Environmental Compliance Standard: -10°C to 55°C (NBR) Cryogenic: -25°C (LT-grade elastomers) Elevated Temp: >80°C (FKM + Class H coils) Media: Oil-free air (<1 ppm contamination); stainless pilots for corrosive service   Electrical Specifications: Voltage tolerance: ±15% of rating Power consumption: DC24V ≤0.8A; AC220V ≤0.06A Durability: 1M+ cycle rating; diaphragm fatigue strength >10 MPa        Operational Impact Analysis:    High-quality coils ensure precise control, precision guide heads ensure stable airflow, and high-performance diaphragm kits directly determine the dust removal efficiency. Statistics show that the use of professional accessories and maintenance solutions can reduce the comprehensive failure rate of pulse valves by more than 60%, and extend the average service life of diaphragms to 1.5 million injections.   Our comprehensive solutions cover standard to specialized valves.   4-Hour Technical Response | Custom Maintenance Planning      

2W Series Water Solenoid Valve   2W series water solenoid valve is the core component in the field of industrial automation fluid control. It adopts direct-acting diaphragm structure design and can be started under zero pressure difference conditions. It is widely used in on-off control of media such as water, air, oil, and gas. Its unique engineering design and high adaptability make it an ideal solution for water supply systems, industrial cooling devices and fluid automation management.      Technology and Features      Direct-acting diaphragm opening and closing system: no need to rely on medium pressure, the diaphragm is directly pulled up to open after power is turned on, supporting zero-pressure starting, and expanding the application scenarios of low-pressure pipelines. Valve diaphragm seal: using NBR (nitrile rubber), VITON (fluororubber), EPDM (ethylene propylene diene monomer rubber) and other materials to enhance the sealing reliability, and the service life can reach more than 1 million times. Plastic-sealed Solenoid coil protection: dustproof and waterproof, suitable for harsh environments such as humidity and dust, wide voltage adaptability (±10% fluctuation), supporting standard industrial voltages such as AC220V/DC24V. Wide temperature range operation: basic type (NBR diaphragm) is suitable for -5~80℃, high temperature type (VITON diaphragm) can be expanded to -5~150℃, meeting the needs of high-temperature media such as hot water and steam. Multi-material valve body options: standard brass valve body, optional stainless steel precision casting, corrosion resistance is suitable for seawater, chemical fluids and other scenarios.                  Specification and Ordering Code    The following table lists the flow and interface specifications of typical models.   Model No. Port Size Orifice Size CV Value Min. Pressure Max. Pressure Function Body Material Seal Material 2W160-10 G3/8'' 16mm 4.8 0 bar 10 bar Normally Closed; Normally Open Brass; Stainless Steel NBR; VITON; EPDM 2W250-25 G1'' 25mm 12 2W350-35 G1-1/4'' 35mm 24 2W500-50 G2'' 50mm 48 CV value: Indicates the flow capacity of the valve. For example, CV=48 (2W500-50) means that 48 US gallons of water can flow through the valve per minute at a pressure difference of 1 psi.     More Options for you:   Port Size: 1/8'', 1/4'', 3/8'', 1/2'', 3/4'', 1'', 1-1/4'', 1-1/2'', 2''; Orifice Size (mm): 2.5, 4.0, 16 ,20, 25, 35, 40, 50; Function: Normally Closed, Normally Open; Body Material: Brass, Stainless; Seal Material: NBR, VITON, EPDM; Coil Type: Round Coil, IP65 Square Coil, IP67 Waterproof Coil, Ex-proof Coil; Coil Voltages: 24V AC, 48V AC, 115V AC, 220V-230V AC, 240V AC, 380V-400V AC, 12V DC, 24V DC.        Application:    Water treatment and irrigation: Anti-pollution design is suitable for water sources from rivers, lakes, and farmland sprinkler irrigation and water plant filtration systems. Industrial systems: Cooling cycle control, lubricating oil circuit disconnection, and gas pipeline safety cutoff. Food and medicine field: Optional silicone diaphragm (food grade certification) to meet the requirements of drinking water and sterile fluid control      Installation and maintenance specifications:    Installation direction: Any angle installation is supported, but the horizontal pipe is recommended to face the coil upward to avoid impurities accumulation affecting the seal. Medium pretreatment: When the fluid contains solid particles, a filter ≥80 μm needs to be installed at the front end. Maintenance points: Regularly check the elasticity of the diaphragm (lifespan is about 3 to 5 years). It is recommended to use a stainless steel valve body in a highly corrosive environment.    

Solenoid valves and their importance in refrigeration systems   Solenoid valves play an important role in refrigeration and air conditioning systems, controlling the flow of refrigerant. While their basic function—opening and closing the flow of refrigerant—is simple, this function is critical to ensuring system performance.      How does a refrigeration solenoid valve work?      In large refrigeration units, multi-cylinder compressors are connected to solenoid valves and are activated using the compressor's discharge pressure. The solenoid valve's job is to deliver refrigerant to all necessary parts of the refrigeration cycle, including from the compressor to the condenser. When refrigeration is not required, the solenoid valve closes, directing the refrigerant to the suction valve instead of the condenser.        How to size a refrigeration solenoid valve?    Sizing a solenoid valve for a refrigeration application requires some preparation to ensure the best results. First, it is important to understand whether you need a direct-acting or servo-assisted solenoid valve. If your solenoid valve contains neither a piston nor a diaphragm, it is most likely a direct-acting solenoid valve. In this case, you can choose a solenoid valve with a smaller connection diameter, ranging from 6 mm to 10 mm.   In large refrigeration systems, servo-assisted solenoid valves are the first choice. Like direct-acting solenoid valves, they do not require any minimum pressure drop to operate. However, the actual pressure must not fall below the minimum pressure drop at all partial load conditions to ensure that the servo valve works effectively. Adequate maximum operating pressure and maximum operating pressure differential also ensure reliable operation and longer service life.     Options for you:   Connection Type: SAE (Flare), ODF (Solder), Flange; Port Size: 1/4'', 3/8'', 1/2'', 5/8'', 3/4'' , 7/8'', 1-1/8'', 1-3/8'', 1-5/8'', 2-1/8''; Operation: Direct Acting, Diaphragm Pilot Operated, Piston Pilot Operated; Coil Voltages: 24V AC, 48V AC, 115V AC, 220V-230V AC, 240V AC, 380V-400V AC, 12V DC, 24V DC.     Normally Closed or Open Solenoids   The most common type of solenoid is the normally closed type. When the coil is energized, the valve is open. When it is de-energized, the valve is closed. For a normally open solenoid, when the coil is energized, the valve is closed; when the coil is de-energized, the valve is open.      More Refrigeration Valves:    We also produce many other refrigeration system accessories:   Four-way Reversing Valve Expansion Valve Ball Valve Pressure Regulating Valve Check Valve Sight Glass Refrigeration Coil Refrigeration Armature ... ...

The diaphragm is a key component of these valves and is usually made of a flexible material such as plastic or rubber.   When deciding which diaphragm type to use, the following factors need to be considered: * Chemical nature of the media * Temperature of the media * Pressure to be used   Here we introduce several common diaphragm materials and the characteristics of each material.     Nitrile Rubber (NBR / Buna-N)   Nitrile rubber is often referred to as NBR or Buna-N. NBR is probably the most common solenoid valve sealing material and many people consider it to be the standard material for neutral fluids. NBR is also the standard material for O-rings. NBR can withstand operating temperatures from -10°C to about 80°C continuously and higher temperatures intermittently. NBR can resist aging caused by heat very well. NBR has poor sunlight resistance, but very good wear and tear resistance. NBR seals are suitable for most media, such as water, air, fuel, oil, gas.     EPDM Rubber   EPDM stands for Ethylene Propylene Diene Monomer Rubber. EPDM solenoid valve seals are ideal for hot water and steam because EPDM has excellent heat resistance. The operating temperature of EPDM is approximately -10 °C to +140 °C. EPDM is not suitable for most oils and fuels and is most commonly used for cold water, Freon, air, steam, hot water.     Viton (FKM)   Viton (FKM) is known for its excellent heat resistance and is suitable for oils, combustible gases, fuels, solvents. The operating temperature range is -10°C to + 150 °C. FKM seals are most commonly used for hot water, acids, alkalis, oils, hydrocarbons, salt solutions.     PTFE - Polytetrafluoroethylene   PTFE is polytetrafluoroethylene. PTFE is resistant to almost all fluids. PTFE is non-elastic, which limits its use in certain applications. PTFE is particularly suitable for media with very high temperatures (usually up to 230°C).     Table 1: Selection criteria for diaphragms   Material Temperature Flexibility Media Nitrile Rubber -10 to +80℃ High water, air, fuel, oil, gas EPDM -10 to 140℃ High cold water, Freon, air, steam, hot water Viton (FKM) -10 to 150℃ Moderate hot water, acids, alkalis, oils, hydrocarbons, salt solutions PTFE -180 to 150℃ Low due to Stiffness Strong acids, alkalis, solvents, high sealing force applications     To enhance the life of the diaphragm, a layer of engineered fabric material is utilized as part of the diaphragm construction. This fabric allows for great design flexibility.   Fabrics are made of polyester, nylon and silk and are commonly used in most applications, such as those exposed to high temperatures, or where extreme strength is required. Advantages of fabric reinforced diaphragms: * No leaks      * No lubrication required      * No separation force * No friction   * Wide pressure range          * High strength * Low cost      * Simple design                     * Versatility     DOTEC is not responsible for the above information and is for reference only.

What is a solenoid armature?    A solenoid armature is the movable metal piece, often called a plunger, located inside a solenoid coil that is drawn into the coil when an electric current is passed through the coil, essentially acting as the moving part that converts electrical energy into mechanical motion within the solenoid device; it's the part that physically moves due to the magnetic field generated by the coil. The armature assembly is a pressure-tight internal part of a solenoid valve.      Key points about a solenoid armature:     Function:   The function of a solenoid armature is to convert electrical energy into mechanical motion. The armature is a movable part of a solenoid's core that moves back and forth to open and close valves or switches. When current flows through the solenoid coil, it creates a magnetic field that pulls the armature towards the center of the coil, allowing for linear movement.     How it works:   An electrical current passes through a wire wrapped around a core. The current creates a magnetic field around the core. The magnetic field moves the armature, which is attached to the core. The armature's back-and-forth motion opens or closes valves or switches. When the current stops, a spring returns the armature to its original position.     Material:   Armature: Typically made from ferromagnetic material like iron, steel or brass, as it needs to be easily magnetized by the coil.  Core: The core is made of stacked metal plates to reduce energy loss. Spring: The spring maintains the armature's reset position.     Application:   Solenoid armatures are used in various applications like solenoid valves, where they control the flow of fluid by opening or closing the valve when energized.   Application in valve: General valve Pulse valve Refrigeration valve Automotive valve Hydraulic valve ... ...  

The diaphragm is a very important accessory in the pulse valve, and it mainly plays a sealing role in the pulse valve. The pulse diaphragm valve needs to control, block or isolate dust and other substances through a flexible diaphragm. Diaphragm opening: When the trapped air is released, a significant pressure difference will be generated on the diaphragm. This pressure difference forces the diaphragm to move suddenly, opening the valve and allowing air to pass through for cleaning.   Different environments are suitable for diaphragms of different materials. The materials of the diaphragms are classified as follows:   1, NBR 2, HNBR 3, low-temperature NBR 4, VITON 5, EPDM 6, PTFE .....     The sealing disc also has different materials. Nylon and PTFE are hard seals. Black rubber, VITON and other materials are soft seals. Among them, hard seals are more recommended than soft seals.     Double diaphragm valves have more advantages in operation than single diaphragm valves.   When the solenoid valve coil is energized, the iron core in the sleeve is magnetized and overcomes the force of the spring to move upward, discharging the air trapped on the valve diaphragm to the outside. At the same time, the compressed air below the diaphragm cannot rise above the diaphragm in a short time and restore the pressure balance. Due to this pressure imbalance, the diaphragm moves upward and the valve reaches the open position. For double diaphragm solenoid valves, this happens twice. The small diaphragm air on the top is emptied first. In this case, the small diaphragm exhausts air to the large diaphragm. In this way, the pressure difference is generated faster and the impact is doubly severe.     DOTEC produces a variety of pulse valve diaphragms: 1, GOYEN Type Pulse Valve Diaphragm 2, ASCO Type Pulse Valve Diaphragm   3, SBFEC Type Pulse Valve Diaphragm 4, TURBO Type Pulse Valve Diaphragm 5, MECAIR Type Pulse Valve Diaphragm 6, JOIL Type Pulse Valve Diaphragm 7, Norgren Buschjost Type Pulse Valve Diaphragm 8, AUTEL Type Pulse Valve Diaphragm 9, TAEHA Type Pulse Valve Diaphragm 10, Other Pulse Valve Diaphragm  

The Basics of Solenoid Coil TechnologyThis article takes an in depth look at solenoid coils:    What is a solenoid coil?    A solenoid coil is a common electrical component that uses a wire tightly wound around a core usually made of metal to create an electromagnetic field. When current passes through the coil, the resulting electromagnetic field moves the iron armature, allowing or blocking fluid from passing through the solenoid. Solenoids are commonly used in a variety of applications, such as controlling fluid flow in hydraulic and pneumatic systems. Solenoid Coil Structure    Coil: Copper wire tightly wound around a fixed core. Spring: A stainless steel spring that returns the armature to its normal position when the coil is de-energized. Static iron core: A ferromagnetic cylinder Movable iron core: The part of the fixed core that moves when the coil is energized, also known as the solenoid plunger. Can: Thermoplastic housing for general environments.      How does a solenoid coil work?    When current flows through the coil, a magnetic field is generated. The strength of the magnetic field is proportional to the current, the number of windings, and the magnetic permeability of the ferromagnetic material of the fixed core. The core acts as a magnetic circuit for the magnetic field. In other words, the core acts as a closed path that confines the magnetic field.   The magnetic field creates a force on the armature that pulls the armature upward, but extending the side of the armature close to the fixed core with a push rod causes the magnetic field to push the armature downward. The armature remains in that position as long as the magnetic field is present. When the magnetic field dissipates, the spring returns the armature to its original position.   Finally, the shading ring provides a low impedance path for the high voltage spike that is generated when the magnetic field dissipates. This reduces the magnitude and duration of the voltage spike, thereby protecting the circuit.  DC / AC Solenoid Coils: There are advantages and disadvantages to using either DC or AC solenoids. When the magnetic force overcomes the spring force and the armature is fully raised, the current flowing through the coil can be reduced to save energy.   DC Solenoid Coil: The DC current flowing through the solenoid creates enough magnetic force to overcome the spring force and lift the armature into the coil. When the coil is de-energized, the spring pushes the armature back into place. DC is slower to respond because DC provides a steady, unchanging current that takes longer to build up and reduce the magnetic field.   AC Solenoid Coil: AC coils are more complicated because AC switches polarity. Twice per cycle, the current is zero, making the magnetic force zero. As the spring force constantly pushes the armature down, the armature vibrates and creates a buzzing sound and puts stress on the components. To combat this, a copper shading ring around the armature stores some of the magnetic energy, reducing vibration. AC changes direction quickly, allowing it to adjust the magnetic field more quickly and efficiently, making AC coils more energy efficient.    Solenoid Coil Applications    There are many types of solenoid coils. Solenoid coils perform a variety of tasks in the field of fluid control and regulation in hydraulic systems. One of the main applications of solenoid coil is in solenoid valves. These valves precisely control the flow of hydraulic fluids by activating or deactivating the solenoid coil.   Examples of typical types of applications for solenoids include:   Locking applications: A magnetic field attracts a plunger inside a solenoid, causing it to move and lock the mechanism in place. When the current is turned off, a spring pushes the plunger back, releasing the lock. Solenoids can be used in a variety of locking applications, including automatic door locking systems, vending machines, access barriers, and many other security devices. Automotive applications: Solenoids are used in a variety of vehicle applications, including shifting gears, starting engines, operating fuel injection systems, locking doors, and actuating valves. Medical applications: Used in medical applications to control fluid flow, regulate valves in medical gas systems, operate pumps and dispensers, and control the movement of medical equipment. Industrial applications: Used in industrial applications to control valves, operate pneumatic and hydraulic systems, control equipment movement, and in automation, robotics, and manufacturing processes. Home Applications: Used in home hydraulic systems including showers, sprinklers, dishwashers, washing machines and other high pressure washers.   For many years, solenoid coils have been an integral part of the feedback system in modern hydraulic systems and Dust Collector Pulse Valve Systems.  

There are many parts of a valve, mainly including the solenoid coil, solenoid armature, valve diaphragm, etc. Each of these parts plays a very important role in the valve, and the reasonable coordination between them makes the valve operate normally.   Solenoid Coil: The solenoid coil is indispensable in the solenoid valve. It generates a magnetic field when it is energized. By generating a magnetic field, they control the movement of the valve armature, thereby regulating the fluid flow in various systems.   Solenoid Armature: The magnetic field generated by the solenoid coil acts on the armature and plunger, causing the valve armature to move under the action of the return spring, thereby controlling the flow of the medium in the valve.   Seals are made of a variety of materials, and the choice of sealing material is different depending on different working media, pressure and temperature factors. Common sealing materials include: NBR, VITON, PTFE, EPDM, PEEK, Ruby, Silicon, HNBR, etc.   Valve Diaphragm: The diaphragm is made of highly flexible polymer materials, and a flexible diaphragm is used to block, control or isolate the flow of fluid.   However, the material and design of the diaphragm limit the maximum operating temperature and pressure of the valve. Common diaphragm material include: NBR, VITON, TPFE, EPDM, etc.   In addition, the mechanical properties of the diaphragm will degrade over time and need to be replaced regularly.

Pneumatic Solenoid Valve, also known as directional control valve, direct or stop the flow of media to equipment. They are usually used in hydraulic or pneumatic systems and are used in conjunction with cylinders, filters, and air pipe joints.   Pneumatic solenoid valve usually adopts a sliding column design, which has good sealing and sensitive response. By sliding the sliding column back and forth in the cylinder, different ports can be connected or closed to achieve reversing control.   Pneumatic solenoid valves can be either normally closed or normally open. According to the number of ports and states, they can be divided into 2/2-way, 3/2-way, 5/2-way, and 5/3-way valves. For example, a 5/2-way valve has 5 ports and two states (open/closed). According to the number of solenoid coil, they can also be divided into single-head and double-head.     Options:  1. Port Size: M5x0.8, 1/8'', 1/4'', 3/8'', 1/2'' 2. Position and Way No: 5/3 Way, 5/2 Way, 4/2 Way, 3/2 Way, 2/2 Way 3. Voltage: 12VDC, 24VDC, 24VAC, 110VAC, 220VAC, etc  

The pulse valve is an integral pilot-operated or remote pilot-operated diaphragm solenoid valve that can open and close quickly. This solenoid valve is widely used in various dust collector systems to remove particles accumulated on the filter surface, which can improve filtration efficiency and extend the service life of the filter, and plays a vital role in maintaining clean air and operating efficiency. Typically, these valves consist of a valve body, a diaphragm, and a solenoid coil, which together control the flow and pressure of the air. Different Connection Types: 1. Threaded Pulse Valves 2. Dresser Nut Pulse Valves 3. Flanged Pulse Valves 4. Manifold Mount Pulse Valves 5. Straight Through Pulse Valves 6. Full Immersion Pulse Valves 7. Compression Fitting Pulse Valves 8. Right Angle Pulse Valves 9. Fixed Nut Pulse ValvesMost Popular Series: 1. GOYEN Type Pulse Valve 2. ASCO Type Pulse Valve 3. SBFEC Type Pulse Valve A dust collector is a system used to remove particulate solid pollutants or recover valuable solids or powders from waste, using back-pulse jet filter cleaning technology. It mainly includes bag filters, cartridge filters, envelope filters, ceramic filters and sintered metal fiber filters. This system is widely used in cement, ceramics, paint, detergent, glass, steel and other industries, mainly used to shake off dust accumulated in jet filters (bag dust collectors) or prevent materials from solidifying.

A solenoid valve is an electrically controlled valve used to control the flow of fluids such as water, gas or oil. It is a valve that uses an electric current to open or close the valve mechanism, so it can be controlled remotely and automatically. A solenoid valve consists of a coil, a plunger, and a valve seat.The coil is an electrical component that creates a magnetic field when current passes through it.The plunger is a movable part inside the coil that moves up and down based on the magnetic field created by the solenoid coil, opening or closing the orifice through which the medium flows.The valve seat is the opening through which the plunger passes. At rest, the valve can be normally open or normally closed. In the power-off state, the normally closed valve is closed and the normally open valve is open.The normally closed solenoid valve is very suitable for applications that require the valve to be closed for a long time, and the normally open solenoid valve is very suitable for applications that require the valve to be open for a long time, which is more energy-efficient. Normally Closed & Normally Open Solenoid valves are available in different designs, construction materials, and circuit functions for use in a variety of applications. They are commonly used in water treatment systems, irrigation systems, automotive, food processing, and many other industrial applications. Options: 1. Port Size: 1/8'' to 3'', etc2. Connection: Thread, Flange, Push-In, etc3. Body Material: Brass, Stainless Steel, Aluminum Alloy, UPVC, CPVC, PTFE, PA, PP, POM, etc4. Seal Material: NBR, EPDM, FKM, FFKM, PTFE, PEEK, Silicone, etc5. Working Medium: Water, Air, Steam, Gas, Liquid, Chemical, Refrigerant, etc6. Function: 2 way, 3 way or Multi ways; normally closed or normally open, etc7. Voltage: 12VDC, 24VDC, 24VAC, 110VAC, 220VAC, other voltages can be customzied 8. Body Material: Brass Solenoid Valve, Stainless Steel Solenoid Valve, Plastic Solenoid Valve, etc

Ningbo DOTEC Automation Co., Ltd. specializes in manufacturing and designing solenoid valve, solenoid coil and solenoid armature, providing high-quality automated fluid control solutions for customers around the world. Our services cover Europe, North America, the Middle East, Southeast Asia and other regions, involving pneumatic automation equipment, refrigeration, dust collectors, food and beverage dispensers, agricultural irrigation, printing and dyeing, home appliances, automobiles, textiles and other industries. We focus on customer needs and provide customized solutions. Before production, we discuss technical points with customers in depth to reduce errors and save costs. Our production process is strict, using high-precision CNC machine tools and machining centers to control product dimensions and improve production efficiency. We have fast delivery, low MOQ, and each product will be strictly tested and inspected before shipment to ensure that the product is defect-free. We are committed to providing customers with the best service, fast response, and making fluid control applications wider and smarter. We aim to make it easy for customers to purchase products, receive them quickly, and provide our best efforts to meet customer needs.