Kromschroder Gas solenoid valve VAG2-/40R/NWAE 88001210

The Kromschroder VAG2-/40R/NWAE (SKU 88001210) is a gas solenoid valve with a nominal diameter of 40 mm and Rp 1½" internal thread. It operates with a supply voltage of 230 V AC and features a single solenoid, fast-acting design with opening time of 0.5 sec and closing time of 1 sec. The valve is normally closed, uses servo technology for precise air/gas ratio control (1:1), and has a control turndown ratio of 10:1. It is certified to EN 88 and EN 161, with protection class IP65, and is suitable for natural gas, LPG, biogas, and air.

Parts of this type are selected by brand and series, connection size (typically Rp ½" 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 incorporates a filter and pressure regulator. The valve sits between the gas filter and the burner, and its wiring must be checked against the burner control terminals. Verify that the replacement matches the existing connection size and coil voltage, and that its function is compatible with the burner control logic.

Typical failures include coil burnout, a leaking seat, drifting outlet pressure, or a seized servo regulator. A leaking seat can be detected by a pressure drop test after the valve closes, while coil burnout is usually confirmed by measuring resistance or by visual inspection of the coil winding. When such failures occur, the equipment may fail to ignite, shut down unexpectedly, or exhibit unstable combustion.