Unlike osmosis, which is the natural tendency of pure water to flow through a membrane into impure water. Reverse osmosis is achieved by applying very high pressure to seawater to counteract the osmotic flow. Thus, seawater is forced through a semi-permeable membrane, which removes all the dissolved solids and produces fresh, potable water on the other side. This method rejects at least 98% of salts, contaminates, and pollutants from seawater.
Salt or brackish water first enters into the watermaker via a through-hull fitting and is filtered through the Sea Strainer. This feed water is then boosted to 30 psi by the Booster Pump and filtered through 25 and 5 micron Pre-filters. Oil, if present, is then separated and removed by the Oil/Water Separator. These filters remove sediments and suspended solids from the feed water prior to entering the High Pressure Pump. A Low Pressure Switch shuts down the watermaker in the event of low flow conditions, preventing cavitation in the High Pressure Pump.
The High Pressure Pump supplies the required force to drive the feed water through the semi-permeable Reverse Osmosis (R.O.) Membrane. The Back Pressure Regulator automatically controls the necessary pressure level in the Membrane Vessel Assembly. An automatic high pressure safety shutdown switch protects the watermaker if pressure exceeds recommended levels.
The fresh water produced flows out of the R.O. Membrane where it is up to 99.2% free of salts, minerals, and other ions. It then passes into the Product Flow Meter where the amount of potable water produced per hour is registered. Next, the Salinity Probe registers the salt content of the product water. If the water is good quality, it passes through the Charcoal Filter, which purifies the water of unpleasant odors and taste. Finally, the last filtration process is completed by an optional Ultraviolet Sterilizer where 99.8% of all micro-organisms, including viruses and bacteria are destroyed.
An on board Reverse Osmosis Desalinator (watermaker) is economical and saves the boat owner money in many respects.
Boat wash downs with demineralized water leaves no spots, requiring no laborious drying time and protects rigging and hull. It saves thousands of dollars in rigging and hundreds of hours in labor.
No more buying water, no more trip diversions to buy water, and no more bacterial and virus attacks.
Water weighs 8.3 pounds per gallon. Storing minimal amounts of water and being able to make more as needed each day reduces the weight and draft of the boat, which saves fuel and allows more space for storage or fuel tanks to take longer voyages.
With a Reverse Osmosis Desalinator (watermaker) on board, you will use fresh water for more things and will not have to conserve while enjoying your voyage much more with safety.
You will have peace of mind, all the while saving time and money.
2. What capacity watermaker is right for my boat? Why do I need so much water?
The typical reverse osmosis desalinator is generally operated for part of the day, perhaps 4 to 6 hours. In that 4 to 6 hours, the water used must be made by the R.O. System. Determine what the pure water can be used for and the daily amount required for: Washing Machine; Drinking; Showers; Ice; Boat Wash down (softened water and leaves no spots); Dish Washer. Divide the total gallon usage by the amount of hours the watermaker will be used. The resulting number is the Gallon Per Hour rating of the required watermaker. ie: 150 gallons used per day divided by 5 hours operation would require a 30 gallon per hour system, or a 720 gallon per day system.
Marine watermakers range from 7 to 263 gallons per hour of operation (170 to 6,300 gallons per day). Commercial watermakers range up to 50,000 gallons per day.
Yes, the Seafari Series is the work horse conventional desalinator designed for frequent use in the typical Pleasure Craft from 40 to 100 ft. The Seafari Escape Series recovers energy and is designed for the smaller boat under 40 feet and the boats without an A.C. Generator. The Horizon Coral Sea Series are commercial rated for Mega Yachts and commercial boats.
Yes. Brackish water will not harm the Reverse Osmosis Membrane Element or System. The Seafari Escape will automatically adjust its pressure to operate in Brackish Water feed sources and produce the correct amount of product water. The Seafari’s pressure can be manually adjusted to allow normal operation in Brackish Water feed sources. The resulting product water will be of very high quality.
HRO systems offers a variety of watermakers for every budget. A HRO watermaker saves money and time in boat maintenance and rigging replacements if the water is used to clean the boat. Our watermakers are competitively priced; ask your local dealer for a quote including installation.
10. What are the power consumption, amperage draw and power and voltage requirements?
The Seafari Escape is an Energy Recovery Reverse Osmosis Desalinator that draws about one ampere per gallon of water produced. The Seafari Escape is ideal for the smaller boat with no on-board AC generator.
Each Series varies and are as efficient as possible. Refer to our brochure for specifications.
The Soft Motor Starter option reduces A.C. starting load by 50% allowing for lower kw generators.
Watermakers are available in any voltage configuration and power limitation.
Generator Size (AC Systems) and Battery Bank (DC Systems) requirements vary depending on Model. Refer to brochure for specifications.
13. Can I operate the system in a marina or harbor?
Yes. A conventional Reverse Osmosis Desalinator, such as the Seafari, can be operated in Marina or Harbor waters when equipped with an Oil Water Separator, which removes oil from the feed water; and with an Ultra Violet Sterilizer, which sterilizes the product water.
15. How does Reverse Osmosis work? How does the Energy Transfer Device work?
The R.O. Membrane rejects salt and allows the potable water to pass through. Refer to question #2: What is Reverse Osmosis?
The Energy Transfer Device (ETD) in the Seafari Escape Series recovers energy from the pressurized brine water and transfers that energy to the pressure chamber within the ETD. For details, refer to the Horizon Reverse Osmosis brochure.
No. Horizon Reverse Osmosis’ R.O. Membrane Elements are manufactured exclusively by Dow Chemical (Filmtec) to more demanding requirements and higher specifications.
Our membranes are Industrial Grade with High Flux (more water per square feet of membrane) and High Rejection (for higher product water quality).
Our membranes produce more water in a shorter package for ease and greater versatility in installation.