EOGB MBDLE 412 B01 S20 Gas Valve 1¼ 240V 19990166

The MBDLE 412 B01 S20 is a multifunctional gas valve supplied under the EOGB brand and produced within the EOGB – Dungs range. It is fitted as a safety and control component on boiler gas trains, combining gas shut-off and regulation with an integral pressure switch. The valve body is 1¼ inch and the assembly is rated for a 240V supply.

• The burner fails to light despite a call for heat and a confirmed gas supply at the inlet.
• The boiler locks out repeatedly, or locks out shortly after ignition.
• No gas is detected downstream of the valve when the boiler is running.
• The pressure switch does not prove, or the boiler will not run with the switch circuit made.
• The valve body or its seals show signs of gas leakage, or the valve fails to shut off fully when de-energised.

• Confirm the valve size required is 1¼ inch, as the port size is fixed and cannot be adapted on site.
• Check the appliance requires a 240V supply to the valve, not a low-voltage control circuit.
• Confirm whether an integral pressure switch is required for the boiler model being worked on.
• Verify the part number 19990166 against the marking on the existing valve before ordering.