Kromschroeder 74924620 VGBF65..05; GIK65/B diaframma di compensazione

Kromschroder 74924620 compensation diaphragm (Diaphragm) — an original elastic element made of Perbunan (NBR), designed to replace a worn part in VGBF 65..05 gas pressure regulators and GIK 65 /B ratio regulators. The diaphragm is the "heart" of the regulator, converting pressure differential into mechanical force to maintain stable outlet pressure. Technical specifications Parameter Value Part numbers 74924620, 624.478.001 Manufacturer Kromschroder / Honeywell (Germany) Part type Compensation diaphragm (Diaphragm / Compensation membrane) Compatibility VGBF 65..05 (gas pressure regulator), GIK 65 /B (ratio regulator) Material Perbunan (NBR) — oil and fuel resistant rubber, resistant to gas exposure Purpose Compensation of inlet pressure fluctuations, stabilization of outlet pressure Application Natural gas, liquefied gas (propane-butane), biogas (with limitations), air Service requirements Replacement once per year (standard conditions) or twice per year (for biogas) ✅ Key advantages Restoration of regulation accuracy: A new diaphragm eliminates outlet pressure instability and restores the regulator's rated accuracy, preventing pressure fluctuations at the burner that could lead to flame failure or incomplete combustion. Prevention of gas leaks: The diaphragm is a key element of the working chamber tightness. Its replacement eliminates gas leakage through the vent line or housing, which is critical for safe operation of boiler equipment. Compensation of pressure fluctuations: The design of the compensation diaphragm (paired with a built-in impulse line) allows the regulator to quickly respond to changes in inlet pressure and flow, providing stable outlet pressure over a wide load range.