Danfoss Gas valve EV220A 042U4082

The Danfoss EV220A gas valve, SKU 042U4082, is a solenoid-operated valve designed for automatic shut-off and regulation of flow in heating systems, water supply, and industrial automation. It is suitable for use with liquids, air, and neutral gases, and is commonly applied in burner systems to control gas supply. The valve features a robust design and corrosion resistance, ensuring stable operation under intensive use. It is compatible with original Danfoss components for straightforward installation and maintenance.

When selecting a replacement gas valve of this type, verify that the connection size (typically Rp 1/2" to 2" or flanged) matches the existing piping, and that the coil voltage (commonly 230 V or 24 V AC/DC) is compatible with the burner control. The valve's function—such as single or double solenoid, slow opening, or servo regulation—must align with the burner's operational sequence. Before ordering, measure the physical dimensions and confirm the pressure rating to ensure proper fit and performance.

Common failure modes for gas valves of this kind include coil burnout, leaking seats, drifting outlet pressure, and seized servo regulators. Symptoms may include the burner failing to ignite, inconsistent flame, or gas supply not shutting off properly. Check the coil for continuity, inspect the valve seat for debris or wear, and verify outlet pressure against specifications. The coil is often replaceable without changing the valve body, simplifying service.