Ravenheat Orifice Ring 77mm 0001DIA09005/0

The Ravenheat orifice ring, supplied as a 77mm air restriction ring, is a gas-path component used in Ravenheat Little STAR, Silver STAR and White STAR boiler ranges. It is fitted to regulate the air and gas mixture reaching the burner, and is listed by the manufacturer under part number 0001DIA09005/0. The orifice diameter forms part of the combustion set-up, so the correct size must be matched to the appliance and its fuel type.

• Combustion readings outside the appliance's stated CO2 or CO figures
• Unstable or lifting burner flame, or a flame that will not hold correctly across the burner
• Repeated lockout or flame-failure faults after servicing the burner assembly
• Visible damage, distortion or corrosion to the ring where it seats in the burner or air path
• The ring has been removed or lost during previous work and the appliance cannot be set up correctly

• Confirm the appliance model and, where applicable, whether it is the LPG or natural gas variant
• Check the existing restrictor or orifice ring is the 77mm size before ordering
• Cross-check the manufacturer part number 0001DIA09005/0 against the appliance's documentation
• On gas appliances, work must be carried out by a competent Gas Safe registered engineer