Round Diaphragm Explosion Vent

The Round Diaphragm Explosion Vent(also known as a circular rupture disc or explosion relief panel)is a critical passive safety device designed for industrial equipment handling combustible dust,gas,or mist.It provides instantaneous,controlled pressure relief during an internal deflagration,protecting vessels,ducts,and personnel from catastrophic damage.

Core Functions

Explosion Pressure Relief:Engineered to burst at a precise,low preset pressure(typically 0.1–0.5 barg/1–7 psig),it opens within milliseconds to release explosive pressure,flames,and hot gases safely outdoors.

Hermetic Sealing:Under normal operating conditions,the diaphragm forms a tight seal,preventing leakage of dust,gas,or process materials,even under vacuum or pressure cycling.

Fragmentation-Free Design:Constructed to rupture cleanly without sharp fragments,eliminating secondary hazards and ensuring safe venting.

Vacuum Resistance:Available with integrated vacuum supports to withstand negative pressure,suitable for pneumatic conveying and dust collection systems.

Construction&Materials

Multi-Layer Composite Structure:Typically consists of three layers:a calibrated metal burst layer(stainless steel 316L/304),a PTFE/FEP sealing membrane,and a protective metal backing.

Domed or Flat Profile:Domed designs offer superior vacuum resistance;flat types suit low-pressure,large-diameter applications.

Integrated Flange&Gasket:Comes with a pre-installed stainless steel flange and EPDM/silicone gasket for easy,leak-tight mounting.

Customization:Available in diameters from 150mm(6")to 1200mm(48");burst pressure,material,and coatings can be tailored to specific process conditions.

Working Principle

During normal operation,the diaphragm remains sealed,maintaining system integrity.When an explosion occurs,internal pressure rises rapidly.Once it reaches the calibrated burst pressure,the diaphragm ruptures along pre-scored or weakened lines,creating a full opening.This instantaneously releases overpressure and flame,preventing equipment rupture and minimizing damage.

Key Advantages

Fast Response:Bursts in<20ms for immediate pressure relief.

High Precision:Burst pressure tolerance as tight as±0.034 barg(±0.5 psig).

Durable&Reliable:Withstands temperature fluctuations(-40°C to+250°C)and pressure cycling.

Easy Installation&Maintenance:Bolt-on design requires minimal downtime;no power or maintenance needed.

Global Compliance:Certified to ATEX,NFPA 68,and EN 14797 for explosive atmospheres.

Application

Widely used in dust collectors,silos,cyclones,dryers,mixers,and pneumatic conveying systems across industries:

Food&Beverage:Flour,sugar,starch processing

Pharmaceutical:Powder handling

Chemical:Combustible dust/gas processes

Woodworking:Sawdust collection

Power Plants:Coal dust systems