Kromschroder Gas filter GFK25R10-6 81937190

Kromschroder Gas filter GFK25R10-6 (SKU 81937190) is a gas filter with a nominal diameter of DN 25 mm and Rp internal thread connections. It is designed for purifying combustible gases and air in gas-consuming systems, with a maximum operating pressure of 1 bar. The filter includes pressure test points at both the inlet and outlet. When the filter element is clean, the pressure drop should not exceed 10 mbar; replacement is required when the pressure drop reaches 20 mbar.

Parts of this type are selected by matching the connection size (DN) and thread standard (e.g., Rp internal thread) to the existing pipework. The filtration grade and flow capacity must suit the burner's rated power. Installation requires correct flow direction (usually marked on the housing) and accessible pressure-tap ports for differential pressure measurement. The element may be cleanable or replaceable depending on the design.

Items of this kind fail when contaminants accumulate, causing the pressure drop to rise. If the pressure drop reaches the replacement threshold (e.g., 20 mbar), impurities may pass through, leading to blocked gas valve seats, damaged servo regulators, or impaired pressure sensing. Symptoms include low gas pressure at the burner, failed flame establishment, erratic modulation, or burner lockout triggered by the gas pressure switch.