Kromschroder Gas pressure regulator VGBF15R40-1 86044010

The Kromschroder VGBF15R40-1 gas pressure regulator (SKU 86044010) is a spring-loaded reducer with a nominal diameter of 15 mm and Rp 1/2" internal thread. It handles a maximum inlet pressure of 4000 mbar and an outlet pressure range of 5–350 mbar, with a standard setting of 10–30 mbar and a factory setting of 20 mbar. The regulator features inlet pressure compensation, a compensation diaphragm, a built-in safety diaphragm (no vent line required), and zero shut-off. It operates in ambient temperatures from -20 to 60 °C, weighs 900 g, and is certified to EN 88, EN 334, and CE. Suitable for natural gas, LPG, and air, it is manufactured in Germany.

When selecting a replacement gas pressure regulator of this type, confirm the connection size and thread type (e.g., Rp 1/2") match the existing pipe. Verify the maximum inlet pressure and the required outlet pressure range (adjustable within the regulator's limits). Check the ambient temperature range and ensure the regulator is compatible with the gas type. Installation typically involves mounting between the main shut-off valve and the burner train, with no external impulse line needed if the regulator has a built-in safety diaphragm.

Common failure modes for this kind of regulator include diaphragm stiffening over time, leading to drifting outlet pressure or instability at low fire. Symptoms may include fluctuating burner output, difficulty maintaining set pressure, or incomplete combustion. Check the regulator's outlet pressure against the set point and inspect the diaphragm for damage or loss of flexibility. Ensure the vent (if present) is unobstructed and directed to a safe area.