De Dietrich 7693998 gas valve 28 kW

Gas valves of this type shut off and meter the gas supply to the burner. They open on command from the burner control and only when the gas pressure switch confirms safe pressure; in premix burners a pneumatic gas/air link ties the valve to the fan. Selection is based on brand and series, connection size (typically Rp 1/2″ to 2″ or flanged), coil voltage (230 V or 24 V AC/DC), and function – single or double solenoid, slow opening, servo-regulated, or a multiblock that also includes a filter and pressure regulator. Common failures include coil burnout, leaking valve seat, drifting outlet pressure, and a seized servo regulator. The coil is often replaceable separately from the valve body, which can simplify a repair. This article is the 28 kW De Dietrich gas valve, catalogue article 336.331.006, also referenced as manufacturer codes 7693998 and 336.331.006. It belongs to the gas valves category. When replacing a unit of this type, ensure that the new valve matches the required connection size, coil voltage, and function. The 28 kW rating indicates the thermal input it is designed to handle. If the valve body is sound and the coil has failed, a separate replacement coil may be available for this model.