Kromschroeder 74924641 diaphragm for VGBF/VAR 80 /B

Safety diaphragm (Compensating / Safety Diaphragm) Kromschroder 74924641 for regulators VGBF 80..40 /B, VAR 80 /B and GIK 80 /B is an original spare part designed to replace the worn elastic element in gas pressure and ratio regulators. This diaphragm is a "safety" one and performs the function of compensating inlet pressure fluctuations. It senses changes in pressure at the regulator inlet and counteracts them, ensuring stable output pressure regardless of line fluctuations. Without its normal operation, when inlet pressure rises, the valve would lift higher, disrupting settings. Installing a new membrane eliminates combustion instability caused by "fatigue" or damage to the elastomer. Technical specifications: Parameter Value Part numbers 74924641, 624.478.013 Manufacturer Kromschroder / Honeywell (Germany) Part type Safety / Compensating diaphragm Compatibility VGBF 80..40 /B (gas pressure regulator DN80, up to 4 bar); VAR 80 /B; GIK 80 /B Material Perbunan (NBR) — oil and gasoline resistant rubber, resistant to natural and liquefied gas Application Natural gas, liquefied gas (propane-butane), biogas Warranty 1 year Application area and signs of wear: This membrane is used in gas pressure regulators VGBF 80..40 /B (size DN80, output pressure up to 4 bar), differential pressure regulators VAR 80 /B, and gas-air ratio regulators GIK 80 /B. These regulators are installed on gas lines before the burner in industrial boiler houses, furnaces and heat generators to stabilize pressure or proportionally control flow. Signs of malfunction or wear of the membrane: Unstable output pressure: Floating or pulsating pressure