Kromschroder Bypass valve VBY8RW6L-RBD 74337978

The Kromschroder VBY8RW6L-RBD is a compact solenoid bypass valve with a DN 8 size, designed for automatic shut-off and adjustable gas supply in bypass or pilot lines. It operates at 230 V AC and features an Rp internal thread, with a protection class of IP54/IP65. The valve is suitable for use with Kromschroder VAS and VCS series valves, and operates within a temperature range of -20 to +60 °C. It complies with strict European safety standards.

Parts of this type are selected by matching the valve size, thread type, coil voltage, and function (on/off or servo-regulated). Before ordering, verify the connection size (typically Rp or flanged), the coil voltage (230 V or 24 V AC/DC), and the direction of gas flow. Ensure the new part matches the existing valve body thread and the burner control output voltage.

Common failure modes for such valves include coil burnout due to sustained overvoltage or high ambient temperature, leaking seat from debris, and sticking of the internal plunger caused by corrosion in the gas supply. When these occur, the burner may fail to light, exhibit unstable flame, or shut down unexpectedly. Check the coil resistance, inspect the seat for debris, and verify the plunger moves freely.