Halstead Quattro Gas Valve 500561
The Gas Valve Is the device that regulates and supplies gas to the burner, it is controlled by the printed circuit board pcb on the boiler. Most gas valves are a modulation type which ensures only the correct amount of gas is passed into the burner chamber ensuring the boiler is has effiecient as possible. A typical domestic boiler gas valve modulates between 2mbar – 12mbar gas pressure.
Halstead Quattro Gold
Halstead Wickes 2000