Kromschroeder 74924628 VGBF80..40 /B Membran

Compensating diaphragm Kromschroder 74924628 for regulator VGBF 80..40 /B is an original spare part designed to restore the tightness and accuracy of the gas pressure regulator. This diaphragm is a "compensating" one — it senses changes in inlet pressure and counteracts them, ensuring stable outlet pressure regardless of line fluctuations. Installing a new membrane eliminates combustion instability caused by elastomer fatigue or damage. Technical specifications: Parameter Value; Part numbers 74924628, 624.478.010; Manufacturer Kromschroder / Honeywell (Germany); Part type Compensating diaphragm; Compatibility VGBF 80..40 /B (gas pressure regulator DN80, outlet pressure range up to 4 bar); Material Perbunan (NBR) — oil and gas resistant rubber, resistant to natural and liquefied gas; Weight 0.024 kg; Application Natural gas, liquefied gas (propane-butane). Application and signs of wear: This membrane is used in VGBF 80..40 /B gas pressure regulators (with outlet pressure range up to 4 bar). These regulators are installed on gas trains (ramps) 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. External gas leaks: gas escaping through the vent line (breather valve) or regulator housing. Sticking of the regulating mechanism: valve stem moves jerkily or jams. Pressure mismatch: regulator cannot raise pressure to set value (droop) or pressure is constantly above setpoint. ✅ Key advantages: Original.