The pressure relief vent for gas fire suppression systems is a critical safety component designed to automatically relieve excessive overpressure generated within a protected enclosure during agent discharge, thereby ensuring the safety of the enclosure structure, boundary elements, and personnel.
During the discharge of clean agents such as HFC-227ea, IG-series inert gases, and carbon dioxide (CO₂), the enclosure pressure rises sharply within a very short time. The pressure relief vent releases excess pressure in a rapid and controlled manner, effectively preventing structural damage to walls, doors, windows, ceilings, and other enclosure components.
Such pressure relief provisions are explicitly required by international standards, including NFPA fire protection codes, and are an essential part of gas suppression system design.
1. Effective Shielding Against Electromagnetic and Radiation Interference
By adopting a radiation-shielded structural design and dedicated shielding materials, the device effectively attenuates electromagnetic waves, radio-frequency (RF) signals, and external radiation, minimizing interference with equipment inside the protected enclosure. It is suitable for applications involving highly sensitive electronic environments.
2. Maintaining Shielding Integrity While Ensuring Pressure Relief
When overpressure is generated during the discharge of a gaseous fire suppression system, the device provides rapid and reliable pressure relief. Under normal operating conditions, it maintains the radiation-shielding and electromagnetic shielding integrity of the protected enclosure, preventing the formation of permanent leakage paths.
3. Rapid Response for Structural Protection
The vent opens immediately when the enclosure pressure reaches the preset activation value, promptly relieving overpressure and protecting the integrity of the protected enclosure.
4. Accurate Pressure Relief, Stable and Reliable
The relief pressure rating can be selected in accordance with system design requirements, ensuring sufficient pressure relief without adversely affecting the required extinguishing agent concentration.
5. Compatible with Multiple Gas Suppression Systems
Suitable for use with HFC-227ea, IG inert gas systems, and CO₂ fire suppression systems.
6. Suitable for High-Security and High-Confidentiality Facilities
The device is particularly suitable for medical imaging rooms such as X-ray, CT, DSA, MRI, and ultrasound (B-mode) rooms, as well as defense-related and confidential facilities, control centers, and other applications requiring both radiation shielding and structural safety.
7. Compliance with International Standards
Designed to meet international requirements for enclosure pressure relief in gas fire suppression systems, making it suitable for overseas and international projects.
Under normal conditions, the pressure relief vent remains closed, maintaining enclosure integrity.
When the gas fire suppression system is activated, a large volume of extinguishing agent is discharged into the protected enclosure within a short period, causing a rapid rise in internal pressure.
Once the enclosure pressure reaches the preset opening pressure of the relief vent, the vent opens automatically.
Excess gas is discharged through the vent, restoring the enclosure pressure to a safe level.
After discharge and pressure normalization, the vent automatically resets or remains in a safe condition, depending on its design.
Model | XZ0.12/1.1-PAVLN | XZ0.25/1.1-PAVLN |
Effective Vent Area | 0.12 m2 | 0.25 m2 |
Actuation Pressure | 1100 Pa（Factory-Set Value） | |
Actuation Accuracy | ±100 Pa | |
Material | Cold-rolled steel with electrostatic powder-coated finish， Radiation - Shielding Lead Plate Cladding | |
Radiation-Shielding | Performance Lead Equivalence > 3.50 mmPb | |
Fire Resistance Rating | 0.50 h | |
Required Opening Size（L×H）(mm) | 480×270 | 690×400 |
Typical Applications
Medical imaging rooms (X-ray, CT, DSA, MRI, ultrasound)
Defense-related and classified facilities requiring radiation shielding
Control centers and technical rooms with radiation-shielding requirements
If you are seeking a gaseous fire suppression system pressure relief device that offers the following features:
Combined pressure relief functionality with radiation shielding and electromagnetic interference (EMI) protection
Rapid and controlled pressure relief to protect both enclosure structure and shielding integrity
Suitable for highly sensitive electronic equipment and high-security applications
Reliable mechanical design with no external power supply required
Compliance with international standards, suitable for overseas projects
Please contact our fire protection solutions team. We provide:
Pressure relief calculation and enclosure venting design support
Product selection, technical consultation, and standards compliance documentation
Project quotation, delivery, and technical services
Installation guidance, commissioning support, and user training
We are committed to delivering safe, reliable, and internationally compliant ancillary solutions for gaseous fire suppression systems worldwide.
Streamlined Steps to Obtain Your Custom Fire Protection Solution
Liaoyepo Road, Ningxiang High-tech Zone, Changsha City,Hunan Province, China
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