Honeywell VR4601MB2005 gas valve

SKU: VR4601MB2005U, 534.322.293

Price on request

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Honeywell VR4601MB2005U gas valves are used for reliable gas flow control in domestic heating systems, water heaters and boilers. They perform standard functions and have the possibility of additional equipment, such as pressure regulators, throttle valves, devices for smooth ignition, two-level regulation and gas flow control. Gas solenoid valves Resideo VR4601MB 2005U Compact Automatic can have different power options, including mains or low-voltage, as well as different throughput.

These gas regulators are equipped with two electrical actuators: one for opening a safety valve of class A or B according to EN 161 and the other for opening the main valve of class B, C or J according to EN 161. They are suitable for working with various types of gases, including MFD Group A (G110), MFD group B (G 120), natural gas H (G 20), natural gas L (G25) and liquefied gas LP (G30).

General characteristics

• Inlet and outlet are suitable for flanged connection

• Screen on the input side

• Pressure valve on the inlet and outlet sides

• Gas connection inlet: diameter 23 mm, outlet: diameter 23 mm

• Compression fitting –

• Back pressure of the 1st valve: 50 mbar; 2nd valve: –

• Ambient temperature 0…60°C

• Maximum inlet pressure 60 mbar

• CE compliance yes


• Coil with top connection

• With adjustable control flow

• With a plug for the control socket

Management functions

• Maximum operating pressure 30 mbar

• Control flow rate 90 1/h ± 3 at an inlet pressure of 9 mbar

• Leakage requirements according to EN 126

• Capacity (by air) 4.2 m3/h with a pressure drop of 3 mbar

• Softlite Pressure –

Standard conditions

• Rated voltage

• Vertical position, i.e. the position when the actuators are on top

• Nominal pressure of 25 mbar, dry air at a temperature of 20 °C

• Registration of the output pressure using a sensor connected to a half-inch pipe, the length of which is 10 times the diameter, by means of a short hose with a length equal to 5 diameters

• Tokruzh. environment = 20 °C

• 2.8mm output aperture

General provisions

General characteristics include the possibility of use with gas heating systems that support DSI, HSI or IP ignition for the main burner.

The main burner is controlled by two-position electrical actuators.

The VR4601 MB 2005U gas solenoid valve includes an internal fine-mesh filter on the input side and can be equipped with an output mesh filter on request. Various models with different closing strength are available: B+ B, B+ J, B+C, A+ J and A+C.

To control and adjust the pressure of the burner, there are pressure measuring fittings with an outer diameter of 9 mm on the input and output sides. The regulator can be installed within an angle of 90° in any direction from the vertical position of the two-position electric actuator.

At the base of the VR4601MB2005B gas valve, two threaded mounting holes are provided for mounting on the heating system. The two-position actuator of the tracking type of the main valve is equipped with an electrical connector according to DIN standard and can be connected to AMP connectors.

The principle of operation

The principle of operation of the VR4601MB 2005B regulator is the automatic control of the gas outlet pressure. It is equipped with a built-in positive feedback system, which ensures reliable closure of the main valve in the event of a power failure or gas supply. This system ensures a stable outlet pressure regardless of changes in the inlet pressure. When disconnecting small volumes of gas from the regulator, the outlet pressure is adjusted to compensate for the pressure difference. If pressure regulation is not required, the regulator spring can be locked, and the full pressure of the “servo gas” will determine the position of the main valve to control the output pressure.