Just one additional note. I completely agree will Bill's description and will add the following. On my Amel SM 2000 SN 335, 160 l/hr Dessalator water maker, the high pressure valve on the control board will occasionally seep a little salt water. Left unattended, this seep, yields salt crystals below the knob. This valve has a small packing or "gland" that surrounds the valve shaft along with a "packing nut" to adjust the pressure of the packing around the valve shaft. This can be adjusted (assuming your system is the same) by removing the valve knob (unscrew the knob retaining screw and simply pull the knob off the shaft), then clean all the salt up by irrigating the area using fresh water. Next SLIGHTLY, VERY SLIGHTLY, torque the packing nut. It will require, in my experience less than 15 degrees of rotation. Replace everything and operate the system. If the seep continues, repeat the process incrementally until the seep ceases. This doesn't mitigate the possibility that you need a new valve, but it is cheap and easy and should be the first step.
Gary S. Silver
Amel SM 2000 Hull # 335
On the hard in Antigua
, <kanalmamman@...> wrote:
Thanks Bill and Ian!
Will follow your advice
Skickat från min iPad
Hi Ann- Sophie,
We have had both problems on Pen Azen. A new tap can be bought from the Desalator agent in the UK --I will send on his details. We use this tap to check on the quality of water and after a while the washer on the tap perishes and it drips. We haven't found a way to replace the washer.
The drip from the pressure knob is indeed salt and it will corrode the knob. If you detach the knob ( undo the small nut in its centre and it pulls off ) you will find a nut behind it. If you gently tighten that nut it presses on a rubber washer that acts as a seal and the seal will work once more.
Are you about to cross the pond ?
Ian and Judy, Pen Azen, SM 302, Ragusa, Sicily
Date: Fri, 15 Nov 2013 02:09:48 +0000
Subject: Re: [Amel] RE: Desalinator D50 from 1998
I am fairly certain that the salt under the knob is from a slight leak from the pressure regulator, when the system is off...from the looks of accumulation of salt, I believe it is leaking one drop at a time. I do not think it is leaking when you are making water. The fact that you have a small leak here is not important, but you should look at this valve from the back side to see if the valve is OK. On my 160l in #387 you can see the watermaker control unit from the back by removing a piece of plywood in the cockpit lazarette, then the back cover of the Dessalator control unit. It might be easier to remove yours from the front...I am not sure.
If the pressure regulator (the valve that the pressure control knob is on) is leaking on the back side while making water, you need to replace it soon. If not, the small leak that you have on the front, under the knob, is not significant and could probably continue without a problem for years.
I hope this helps you.
BeBe, SM2k, #387
Currently Fethiye, Turkey