Steel Transformer Security Doors

SilentDoor Rw® Sentinel Ultra

High level security door


Model Reference: SD-STRU

The SilentDoor Rw® Sentinel TR Ultra is an advanced doorset specifically designed for transformer rooms, providing an exceptional combination of high-level security, impressive fire resistance, superior acoustic insulation, and energy efficiency. This state-of-the-art doorset is available in both single-leaf and double-leaf configurations, making it incredibly versatile and suitable for a variety of applications, whether for interior or exterior use. Its thoughtful design ensures comprehensive protection for critical infrastructure, safeguarding essential equipment and contributing to the overall safety and functionality of the environment in which it is installed. Additionally, the SilentDoor Rw® Sentinel TR Ultra not only meets high standards for performance but also incorporates aesthetic considerations, making it an ideal choice for modern facilities.


Key Features of SilentDoor Rw® Sentinel TR Ultra;


  • Security Ratings (RC3 to RC6): The SilentDoor Rw® Sentinel TR Ultra offers a range of security classifications from RC3 to RC6, allowing you to select the appropriate level of protection based on the specific security needs of your transformer room. RC6-rated models provide the highest level of defense against sophisticated forced entry attempts, ensuring the integrity of the room and its equipment.
  • Fire Resistance (EI₂ 60 to EI₂ 120 Minutes): With fire resistance ratings ranging from 60 to 120 minutes, this doorset is designed to contain fire and smoke, providing critical protection for the transformer room and adjacent areas. This feature is vital in safeguarding the facility and ensuring compliance with fire safety regulations.
  • Acoustic Performance: The SilentDoor Rw® Sentinel TR Ultra delivers exceptional acoustic insulation, making it ideal for environments where noise control is important. Available acoustic ratings include:
  • 44 dB (Rw) and 52 dB (Rw): Effective noise reduction for environments with significant sound management requirements.
  • 43 dB (Rw) and 51 dB (Rw): Suitable for transformer rooms adjacent to noise-sensitive areas, providing a quieter environment.
  • Energy Efficiency: The doorset is engineered to optimize energy efficiency, with thermal performance options designed to minimise energy loss:
  • <1.4 W/m²K: Ensures robust thermal insulation, supporting efficient energy management within the transformer room.
  • <1.3 W/m²K: Offers superior thermal performance, ideal for facilities where maintaining stable internal temperatures is critical for equipment operation.


Suitable applications (recommendations are as follows)


SilentDoor Rw® Sentinel TR Ultra

  • Utility Infrastructure: Ideal for securing transformer rooms in power plants, substations, and other utility facilities where high-level security, fire resistance, and noise control are essential.
  • Commercial and Industrial Facilities: Suitable for use in large commercial buildings, factories, and industrial sites where transformer rooms require enhanced protection against fire, noise, and unauthorized access.
  • Public Buildings: Perfect for transformer rooms in hospitals, universities, and government buildings, ensuring compliance with stringent safety and security standards.


Learn more on how much 5dB makes a difference, when choosing a SilentDoor RW® HERE

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