Honeywell VK4105M5108 gas valve

The Resideo VK4105M5108U valve plays a key role in the burner control and ignition system, providing safe ignition, flame control and gas flow control for both the pilot and main burner. This component includes the VK4105M 5108U gas regulator itself and a specialized ignition regulator that connects to it. This valve is also installed on boilers BAXI ECO 1.240 Fi, 1.240 i, ECO 180.1 I – BAXI – (AT), 240 FI, 240 i, 280 Fi, 280 i, ECO Four 1.14, 1.14 F, 1.24, 1.24 F, 24, 24 F, ECO-3 1.140 Fi, 1.240 Fi, 240 Fi, 240 i, 280 Fi, ECO-3 COMPACT 1.140 Fi, 1.140 i, 1.240 Fi, 1.240 i, 240 Fi, 240 i, ECO-4s 1.24 F , 10 F, 18 F, 24, 24 F, ECO3 1.240Fi, ED 21 EI, ENERGY 1.240 FI, 1.240 I, 24 CE BROTJE, 24 CTE, 24 E, 24 TE, 240 FI, 240 i, 280 FI, 280 i, EASY 24 CE, 24 CTE, TOP 24, 24 CE, 24 E, 24 TE, 28 CTE, TOP+ 24 CE, FALKE 24 MASTER: 5665220.

The Honeywell VK4105 M 5108U gas valve has a standard housing and has a variety of functional settings, including:

• Pressure regulation using a servo drive.
• Regulation via the throttle valve.
• Smooth ignition using SOFTLITE technology.
• Regulation of the ratio of gas and air in a ratio of 1:1.
• Electric two-level regulator.
• Smooth regulation with amplification for various control methods.

The VK4105M5108B gas solenoid valve is equipped with two electrical devices: one for controlling the main valve and the other for controlling its position. This gas solenoid valve can work with three types of gases: heating, natural and liquefied.

General technical specifications

• Inlet and outlet are suitable for flanged connection
• Screen: On the input side
• Pressure valve: Top for measuring inlet and outlet pressure
• 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: -15 … 60°C
• Maximum inlet pressure: 60 mbar
• Management functions
• Maximum operating pressure: 60 mbar
• Leakage requirements: According to EN126
• Capacity (by air): 3.4 m3/h with a pressure drop of 3 mbar

Standard working conditions

• The nominal pressure of the inlet gas is 25 millibars, with dry air and a temperature of 20 °C.
• The ambient pressure is 1013 millibars.
• The ambient temperature is maintained at 20°C.
• The output pressure is recorded using a sensor connected to a pipe with a diameter of 1/2 inch, 10 times the diameter, through a short hose with a length equal to 5 pipe diameters.
• The Honeywell VK4105M 5108B gas valve operates at rated voltage and is installed in an upright position.
• The aperture has a size of 2.8 millimeters.
• Information on gas consumption is provided in cubic meters per hour.

Main Features

The VK4105 M 5108B gas valve combines all the safety and burner control functions in one reliable system. The inlet and outlet of the valve have a diameter of 18.6 millimeters and can be connected via flanges. There are different models of this valve with different closing force, such as B+J, B + C, B+ B.

A built-in fine-mesh filter is installed at the inlet of the Resideo VK4105M5108 gas regulator, which is not intended for cleaning, but an additional output filter can be added if necessary. In addition, there are holes on the bottom of the valve for mounting to the installation.

There are options for gas valves with a side outlet for both the main and pilot burners, but such a side outlet can only be used with a flange burner manifold. A 4 mm diameter connection is also available for the pilot gas, and pressure measuring fittings can be installed using silicone tubes with a diameter of 4 or 6 mm.

There are a variety of electrical connection options, including connecting to the ignition regulator via a connector or using a plug-in rectifier unit for standard DBI ignition systems. In addition, it is possible to select the operating mode at a voltage of 24V for joint use with other ignition regulators, with the exception of regulators of the S4565/S4585 series.

The principle of operation

As for the principle of operation, VK4105M5108 gas regulators use a positive feedback system, which means that the main valve automatically closes when there is no power supply or gas pressure is exceeded

The system includes a pressure servo controller and a pressure relief valve that work together. When the power supply is supplied, the gas passes through the servo controller and opens the main valve. The system then maintains a constant pressure by regulating the operation of the main valve, which ensures a stable outlet pressure, even with changes in the inlet pressure.