De Dietrich S101507 gas block VK4115V E1054 4

This is a De Dietrich gas block, catalogue article 336.331.008 and manufacturer code S101507, listed under Gas valves in the catalogue. The product name includes the reference VK4115V E1054 4, which identifies the specific variant within the series. Gas valves of this type perform two essential functions in a burner or boiler: they shut off the gas supply when the burner is not firing and meter the flow during operation. The valve opens only after the burner control receives a heat demand and the gas pressure switch confirms that the supply pressure is within safe limits. In a premix burner, a pneumatic link between the gas valve and the fan ensures that the gas flow follows the air flow proportionally, maintaining the correct mixture across the firing range. When selecting a replacement gas valve for a burner, the key parameters are the connection size – typically Rp ½" to 2" threaded or flanged – and the coil voltage, which can be 230 V AC or 24 V AC/DC. The valve may be a single solenoid, a double solenoid (two safety shut-off paths), or a multiblock that integrates a filter and a pressure regulator. Some valves offer slow-opening or servo-regulated characteristics to control the gas ramp-up during ignition. The coil is often replaceable separately, so a valve body that is otherwise serviceable can sometimes be repaired rather than replaced. Common failure modes include a burned-out coil, a leaking valve seat, drifting outlet pressure, or a seized servo regulator. Before ordering, verify that the connection size, coil voltage, and functional features match the existing installation.