Kromschroder Gas pressure regulator VGBF25R10-1 86046210

The Kromschroder VGBF25R10-1 gas pressure regulator (SKU 86046210) maintains a constant outlet pressure within a range of 5–350 mbar, compensating for inlet pressure fluctuations via a diaphragm. It features a zero shut-off function that automatically closes the gas flow when consumption stops. The regulator is designed for inlet pressures up to 1000 mbar, with a Rp 1" internal thread connection and a nominal diameter of 25 mm. It operates within an ambient temperature range of -15 to +60 °C, and its diaphragm is made of perbunan, while the body is aluminum alloy. The unit includes a safety diaphragm that eliminates the need for a vent line, and it must be installed vertically. It is suitable for gases that do not condense, including natural gas, town gas, LPG, biogas (with H2S content up to 0.1%), and air, and is commonly used in metallurgy, ceramic, and glass industries.

When selecting a replacement gas pressure regulator of this type, verify the connection size and thread type (e.g., Rp 1") to match the existing piping. Confirm the inlet pressure rating and the adjustable outlet pressure range are compatible with the system's requirements. The regulator must be installed vertically, with the spring housing at least 2 cm from any wall. Ensure the impulse connection is properly linked if present, and that the gas does not condense during operation.

Common failure modes for this type of regulator include a torn diaphragm or a blocked impulse line, which can cause outlet pressure drift. A worn internal spring or adjusting mechanism may also lead to inconsistent pressure. If the regulator fails to shut off when gas flow stops, the zero shut-off function may be compromised. Check the diaphragm and impulse line for damage or blockage, and verify the spring mechanism operates smoothly.