Kromschroeder 74924640 VGBF/VAR 65 /B diaphragm

Safety diaphragm (Compensating / Safety Diaphragm) Kromschroder VGBF/VAR 65 /B, 74924640 is an original spare part designed to restore tightness and accuracy of gas pressure and differential pressure regulators. This diaphragm is a "safety" (compensating) one. 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 wear or damage to the elastomer. Technical specifications: Parameter Value Part numbers 74924640, 624.478.015 Manufacturer Kromschroder / Honeywell (Germany) Part type Safety / Compensating diaphragm Compatibility VGBF 65 /B (gas pressure regulator DN65); VAR 65 /B (differential pressure regulator) Material Perbunan (NBR) — oil and gasoline resistant rubber, resistant to natural and liquefied gas Application Natural gas, liquefied gas (propane-butane) Warranty 1 year (when purchased from official dealers) Application area and signs of wear: This membrane is used in gas pressure regulators VGBF 65 /B and differential pressure regulators VAR 65 /B. These regulators are installed on gas lines before the burner in industrial boiler houses, furnaces and heat generators to stabilize pressure. VGBF — high pressure regulators with the ability to adjust output pressure in various ranges. VAR — differential pressure regulators that maintain a constant pressure difference before and after the valve and relieve short-term pressure surges in gas systems.