Noise Levels

The TORPEDO PUMP was originally designed for clients requesting LOW NOISE LEVELSin R.O. FEED PUMPS. The Hewlett Packard Company (in California) was operating their R.O. Systems in their facility's basement, below the production floors. The noise from the old pumps were causing problems with the workers on the production floors. We built our first TORPEDO PUMPS to solve this problem for H-P, but since then we have gone on to become the "standard" for low-noise level pumps in the microelectronics/semiconductor business, as well as the co-generation; pharmaceutical; and beverage industries.

The reason that the TORPEDO PUMP is so quiet is that the pump end and motor are runningUNDERWATER. High-frequency sound cannot be transmitted through water ... this is why submarines have to surface at night to send radio transmissions back to their bases. Only low frequency sound transmits through water.

We have never been able to accurately determine the ACTUAL sound level of the TORPEDO PUMP(s). "Surrounding (background) noise" on a typical R.O. System is so loud (concentrate throttling valves; flow meters; other pumps with air-cooled motors; etc.) that we cannot get a good reading to register on a noise meter (measured in dbA). We know that the TORPEDO PUMP is so quiet, you have to check the pressure gauges to see if it is actually running. Our best guess is approx. 70 dbA (about the same sound level as an IBM Selectric typewriter). NOISE just never has been an issue with the TORPEDO PUMP ... in fact, it is the main reason why the TORPEDO PUMP is specified in more high-tech applications than any other R.O. Feed Pump in the industry.


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Last Updated March 29, 2009 by Pumps Unlimited 19 Affonso Drive, Carson City, Nevada 89706  (775) 246-0800, FAX (775) 246-0847