Kromschroeder 74924621 VGBF 80.. 05 / 10 GIK 80 /B diafragma

Compensating membrane (diaphragm) Kromschroder 74924621 for VGBF 80..05/10 and GIK 80 /B is an original spare part designed to restore regulation accuracy and tightness of gas pressure and ratio regulators. This diaphragm is a "compensating" one. It senses changes in inlet pressure and counteracts them, ensuring stable outlet 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 elastomer fatigue or damage. Technical specifications: Parameter Value; Part numbers 74924621, 624.478.011; Manufacturer Kromschroder / Honeywell (Germany); Part type Compensating diaphragm; Compatibility VGBF 80..05/10 (gas pressure regulator DN80, up to 1 bar); GIK 80 /B (ratio regulator); Material Perbunan (NBR) — oil and gas resistant rubber, resistant to natural and liquefied gas; Application Natural gas, liquefied gas (propane-butane). Application and signs of wear: This membrane is used in VGBF 80..05/10 pressure regulators (with outlet pressure up to 1 bar) and GIK 80 /B gas-air ratio regulators. Both types of regulators are installed on gas lines before the burner in industrial boiler houses, furnaces, and heat generators. Signs of malfunction or wear: Unstable outlet pressure: pressure floating or pulsating after the regulator despite spring adjustments. Gas/air ratio drift: inability to set normal combustion (O2/CO2 content fluctuates), characteristic of GIK. External gas leaks: gas escaping through the vent line (breather valve) or regulator housing.