Honeywell VK4105N2021 gas valve

SKU: VK4105N2021U, 534.331.105

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The Honeywell VK4105N2021U gas solenoid valve is a critical component of the burner control and ignition system, providing a reliable and safe ignition process, effective flame control and precise gas flow control for both the pilot and main burner. It is important to emphasize that this system includes not only the Honeywell VK4105N 2021U valve itself, but also a special ignition regulator that integrates with it to ensure consistent and reliable operation.

The Resideo VK4105 N 2021U gas regulator is a highly adaptive device with a classic body and a variety of customizable options, providing accurate and reliable gas flow control in various applications. Here are the main characteristics and options of this valve:

  1. Support pressure regulation through the use of servo: This function allows you to fine-tune the gas pressure according to the requirements of a particular process.
  2. Throttling valve control: In addition to the servo, an alternative throttling valve control option is provided. This method gives an additional level of control over the gas flow and can be optimized for various tasks.
  3. SOFTLITE system for soft ignition: The innovative SOFTLITE system ensures smooth and safe ignition, which is especially important in processes requiring delicate handling of gas.
  4. Gas-air ratio control in a ratio of 1:1: The ability to fine-tune the gas-air ratio ensures optimal mixing, which contributes to efficient combustion.
  5. Two-level electric regulator: This element allows you to control the gas valve at two different levels, which is ideal for control in various modes and conditions.
  6. Stepless regulation with amplification: The stepless regulation with amplification function provides flexibility in setting up the valve, which allows it to be adapted to the specific needs of your system and control methods.

The Resideo VK4105N2005U gas solenoid valve is a reliable and high-performance device with a variety of configuration options, making it an ideal choice for a variety of applications where precise and reliable control of the burner and gas flow is required.

The Resideo VK4105N2021B gas regulator is a reliable and high-performance device with a wide range of options that allow you to fine-tune it to the specific requirements of your production or heating system.

The VK4105N 2021B gas valve is a device equipped with two electrical components, one of which is responsible for precise control of the main valve, and the second for reliable control of its position. This ensures a high degree of accuracy and reliability in the operation of the burner, which is critically important for the safe and efficient operation of the heating and combustion system.

One of the outstanding advantages of this gas valve is its versatility. It is designed to work with various types of gases, including heating gas, natural gas and liquefied gas. This makes it an ideal choice for a variety of applications where reliable and efficient burner control is required. Honeywell VK4105 N 2021B is a reliable partner in ensuring the safety and efficiency of heating and combustion systems, and also demonstrates high versatility in working with different types of gas.

Technical specifications

  • Input and output are compatible with flanged connection.
  • The screen is located on the input side.
  • The pressure valve for measuring the inlet and outlet pressure is located on top.
  • Gas connection: Inlet – diameter 18.6 mm, outlet – side outlet diameter 18.6 mm.
  • Back pressure: 1st valve – 50 mbar, 2nd valve – 0 mbar.
  • Ambient temperature range: -15 … 60°C.
  • Maximum inlet pressure: 60 mbar.

Management functions

  • Maximum operating pressure: 45 mbar.
  • Compliance with leakage requirements according to EN126.
  • Performance (by air): 3.4 mph with a pressure drop of 3 mbar.
  • Softlite pressure: 3 mbar (-2/+0 after 1.5 sec.) and can be adjusted.

These characteristics and functions allow the gas valve to effectively regulate the gas flow and ensure reliable and safe control of the heating or combustion system.

Standard working conditions

The VK4105 N 2021B gas valve has the following characteristics:

  • The nominal pressure of the inlet gas is 25 millibars under the condition of dry air with a temperature of 20°C.
  • The output pressure is monitored using a sensor that is connected to a 1/2-inch diameter pipe. The length of this pipe is equal to 10 times the diameter of the pipe, and the signal is transmitted through a short hose, the length of which is 5 pipe diameters. This ensures accurate measurement and control of the output pressure.
  • The device operates at an ambient temperature of 20°C.
  • The gas valve is equipped with a 2.8 mm diameter diaphragm, which plays an important role in regulating the flow of gas, ensuring precise control of it.
  • Information about gas consumption is displayed in cubic meters per hour, which ensures accurate measurement of gas consumption and control of its flow.
  • The device operates at an ambient pressure of 1013 millibars, which corresponds to standard atmospheric pressure.
  • The VK4105N2021 gas valve operates at rated voltage and must be installed in an upright position to ensure reliable and efficient operation.

General provisions

The Honeywell VK4105N 2021 gas valve has a number of key characteristics and capabilities, making it an important component of the burner control and ignition system:

  1. Inlet and outlet diameter: The inlet and outlet of the valve have a diameter of 18.6 millimeters, which facilitates their connection through the flanges and ensures a reliable connection.
  2. Closing force level: The gas valve is available in different models with different closing force levels, such as B+J, B+C, B +B, which allows you to choose the appropriate option depending on specific requirements and applications.
  3. Built-in fine-mesh filter: At the input of the VK4105 N 2021 controller there is a built-in fine-mesh filter designed to protect the system. If necessary, an additional output filter can be added to improve gas filtration.
  4. Mounting holes: To facilitate the installation of the valve, holes are provided at the bottom of the device for mounting to the installation, ensuring reliable and stable placement.
  5. Side gas outlet: There are variants of gas valves with side gas outlet, designed for both the main and pilot burner. It is important to note that such a side outlet can only be used with a flanged burner manifold.
  6. Connection for pilot gas: At the outlet of the Honeywell VK4105N2021U gas solenoid valve there is a special connection for pilot gas with a diameter of 4 mm, which ensures reliable power to the pilot burner.
  7. Different types of electrical connections: The user has the option of choosing different types of electrical connections, including connecting to the ignition regulator using a connector or using a plug-in rectifier unit for a standard DBI ignition system. It is also possible to choose options for operation at a voltage of 24V for joint use with other ignition regulators, excluding regulators of the S4565/S4585 series.

The Honeywell VK4105N 2021U gas valve combines a variety of functionality, making it a reliable and flexible component to ensure the safety and efficiency of heating and combustion systems.

The principle of operation

The principle of operation of VK4105 N 2021U gas valves is based on a positive feedback system that provides reliable and automatic control of the gas flow. Here’s how it works:

  • Initial state (without power supply): In the absence of power supply or other emergency situations, the main valve is in the closed position and the gas flow is blocked.
  • Power supply: When the power supply is supplied, the system is activated. The gas begins to flow into the pressure servo controller.
  • Opening of the main valve: The pressure regulator operates on the basis of positive feedback. It controls and regulates the gas pressure by transmitting the appropriate commands to the main valve. Under the influence of the servo controller, the main valve begins to open, allowing gas to pass through it.
  • Maintaining a stable pressure: The system continuously monitors the gas pressure and regulates the operation of the main valve so that the pressure remains at the set level. Even with input pressure changes, the system adjusts the operation of the main valve to ensure a stable output pressure.
  • Safety: If an emergency overpressure or power failure occurs, the system responds immediately. The pressure relief valve is activated, providing a quick and safe reduction of gas pressure. This is an important safety provision to prevent possible emergencies.

Thus, VK4105N2021U gas regulators provide stable and reliable gas pressure in the system, as well as emergency shutdown in case of emergency situations to ensure the safety of the operation.