Watermaker

Katadyn Survivor 35 – manual watermaker

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No sailor wants to be caught in a situation where he or she is completely devoid of fresh drinking water, so a Watermaker is a survival must for all ocean boat emergency kits.

Katadyn originally made the Survivor line of desalinators because the U.S. Navy wanted hand-operated, reverse-osmosis watermaker for their 35-person life-rafts.

Katadyn Survivor 35 is the most widely-used emergency desalinator. Produces up to 4.5 litres per hour, it is widely used by US and international military forces, voyagers, sea kayakers, and other adventurers.

deslinationdiagram

To remove dissolved salts from seawater with reverse osmosis, part of the salt water is filtered through a semipermeable membrane. Only 10% of the water passes through the membrane. The remaining 90% flow past the membrane and at the same time cleans the membrane (self-cleaning effect). The small size of the “membrane pores“ ensures extremely pure drinking water, but extremely high pressures must be generated – normally 55 bar.