Diaphragm type and bevel type explosion doors are two common pressure relief safety devices for flue gas, pulverized coal and industrial pipeline systems. Both serve to release sudden explosion pressure and protect pipes and equipment, yet they differ greatly in structural design, working principle, performance characteristics and applicable working conditions.
In terms of structure, diaphragm explosion doors adopt thin rupture membrane as the pressure bearing and bursting part, with flat sealed structure and compact overall layout. Bevel explosion doors are designed with inclined door plate structure, mostly equipped with gravity counterweight or hinge assembly, featuring three-dimensional turnover opening form and thicker door body structure.
Their working principles are totally different. The diaphragm type works based on material bearing limit. When internal explosion pressure exceeds the preset threshold, the membrane breaks instantly to discharge pressure rapidly. It belongs to one-time pressure relief component and cannot recover after action. The bevel type relies on gravity balance. Once pressure surges beyond standard value, the inclined door plate is pushed open to release pressure. After pressure drops back to normal level, the door will automatically reset and seal, supporting repeated use.
They also show distinct performance advantages. Diaphragm explosion door responds extremely fast with high pressure relief precision, suitable for severe instantaneous explosion impact. It has good airtightness and can effectively prevent gas leakage in daily operation. Bevel explosion door boasts strong impact resistance and durable structure, capable of enduring frequent pressure fluctuation. Its reset function cuts replacement cost and simplifies routine maintenance.
Applicable scenarios vary obviously. Diaphragm type is widely used in closed pulverized coal pipelines, high-pressure flue pipes and dust collector vessels with strict explosion protection demands. Bevel type fits boiler flue, air duct and conventional smoke exhaust pipelines that face frequent pressure changes and require reusable safety protection.
In practical selection, users choose according to actual pressure level, explosion risk frequency and later maintenance demands. Both types effectively avoid pipeline rupture and equipment damage, securing safe operation of thermal power, chemical and industrial furnace systems.
