Honeywell VK4100D1025 gas valve

The Honeywell VK4100D1025U gas 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 the main burner. This component includes the VK4100C1026 gas valve itself and a specialized ignition regulator that connects to it.

The Resideo VK4100D 1025B combined gas valve has a standard body and has a variety of functional settings, including:

– Pressure regulation using a servo.

– 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 VK4100 D 1025U 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 suitable for flange connection
• Screen: At inlet side
• Pressure tap: On top for inlet and outlet pressure
• Gas connection: Intel: 3/4″ external   Outlet: 3/4″ external
• Compression fitting: 4  mm
• Backpressure: 1 st valve: 50 mbar; 2 nd valve: 0 мбар
• Ambient temperature: -15 … 60°C
• Max inlet pressure: 60 mbar

Management functions

• Max operating pressure: 60 mbar
• Pilot flow: 0,1 m³/h (min) air at 9 mbar pressure drop
• Leakage requirements: Acc.EN126
• Capacity (air): 3,1 m³/h at pressure drop of 3 mbar
• Softlite pressure: 5 mbar (-3,5/+0 after 1,5 sec.) adjustable

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 VK4100 D 1025B compact gas unit 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 VK4100D1025 gas control unit 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 VK4100D 1025U gas control block, 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 burner, 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, VK4100 D 1025U 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.