Kromschroder Pressure regulator VAD125R/NW-100A 88000265

The Kromschroder VAD125R/NW-100A (SKU 88000265) is a servo pressure regulator with a built-in solenoid valve, designed for gas burners, industrial boilers, and furnaces. It has a nominal diameter of 25 mm with Rp 1" internal thread, a maximum inlet pressure of 500 mbar, and operates on 230 V AC. The unit features two Class A valves, meets EN 88 and EN 161 standards, and includes a blue LED position indicator. It is certified to EC, FM, CSA, and UL, with IP65 protection and an M20 cable gland. Opening time is 0.5 seconds, closing time is 1 second, and it has pressure test points for adjustment.

When selecting a replacement pressure regulator of this type, match the connection size (threaded or flanged), pressure range, and flow capacity to the burner's requirements. Verify the inlet pressure rating and ensure the electrical supply (voltage and AC/DC type) matches the system. Check the valve classification and safety standards for compliance with local codes. Installation typically involves connecting the gas line, wiring the solenoid, and adjusting the outlet pressure to the specified setpoint.

Common failures include a torn diaphragm causing outlet pressure drift, a blocked vent line preventing proper regulation, or a seized servo mechanism. Symptoms may include unstable burner flame, inability to reach set pressure, or failure to shut off gas flow. Check the diaphragm, vent line, and servo operation if these issues occur.