Made in Japan
Manufacturer: NOHMI BOSAI
Model: PNQ/ZMQ Series

Features of PNQ/ZMQ Series

Decreases impact on HDDs caused by the gas discharge noise
Reduces discharge noise while maintaining the fire suppression performance
Easily replace existing nozzles

Noise may affect HDDs

At a convention held by the Architectural Institute of Japan on September 11, 2010, an article entitled “Study on the effects of sound environment to precision instruments”. According to this article, noise of 110 dB or larger may cause potential damage to HDDs.

Effects caused by the gas discharge noise of a fire suppression system

The article mentioned in the paragraph on the left suggests that noise such as the gas discharge noise of a fire suppression system may have a negative impact on HDDs. Furthermore, there are risks including business downtime caused by the decreased speed of HDDs, as well as loss of data.

Development of a noise reduction nozzle

To provide HDDs with protection from the sound environment, Nohmi has developed a noise reduction nozzle that reduces gas discharge noise using our exclusive technology.

Sound Pressure level

Sound pressure curve during fire supression gas discharge

*1 The nozzle flow rate indicated above is an example. Products with different flow rates are also available.
*2 Results (maximum value) measured in front of the discharge point, 1 m away at a 45° angle.

Specification