Kromschroeder GFK40R40-6 (81939200) gas filter

The Kromschroeder GFK40R40-6 (81939200) is a gas filter, a component installed in the gas supply line upstream of the burner control train. The part carries manufacturer codes 81939200 and 624.880.029. The catalogue lists it in the Gas filters category. Parts of this type remove solid particles and pipe debris from the gas stream before it reaches the gas valve, pressure regulator, and burner nozzles. A clogged or missing filter can cause erratic valve operation, pressure drop, or failure of downstream components. Such filters are typically selected by connection size, filter fineness (mesh rating), and working pressure range. The housing is usually aluminium or steel, and the filter element is replaceable often without removing the body from the pipe. When replacing a filter of this class, verify that the connection size matches the existing line and that the filter is suitable for the gas type (natural gas, LPG, or biogas). Note the flow direction marked on the housing. The filter element should be inspected and changed at scheduled intervals or when a noticeable pressure drop occurs across the filter. Some filters include a differential pressure gauge port for monitoring. Ensure the gasket or O-ring sealing the cover is intact and compatible with the gas composition.