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U.S. wfp USER

  • Posts: 313
Low Pressure Vs. High Pressure RO Membranes
« on: February 13, 2007, 08:14:57 pm »
I have noticed that you can purchase membranes that are designed for low pressure.

How do these perform vs. high pressure membranes?

They are quite a bit more expensive so Im wondering if you get a better product over the high pressure when not using a booster.

Thanks.
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Shawn Gavin
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JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #1 on: February 14, 2007, 12:51:40 am »
the low pressure membranes are more suited to home users as they will produce more at sub 100psi pressures than a high pressure membrane.

the high pressure membranes are more suited to high tds applications where a booster pump is used, typically around 300psi
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #2 on: February 14, 2007, 04:34:21 am »
what booster pump will achieve 300psi?
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Shawn Gavin
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JM123

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Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #3 on: February 14, 2007, 06:06:30 pm »
you'll need a 4inch horizontal Myers MPB

7/10/20GPM 115/230VAC

outlet pressure 315psi.
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #4 on: February 14, 2007, 08:10:29 pm »
Where can I purchase this Myer pump?

Is the clarke pump that has been mentioned here not up to the task?

Thanks.
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Shawn Gavin
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JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #5 on: February 14, 2007, 11:27:11 pm »
the clarke pump is fine for the low pressure membranes, the myers is the job for the high pressure membranes.

I would honestly recommend the low pressure membranes with the clarke pump - you can run 2 membranes off one clarke pump - with around 400ltrs/hr production at 98/99% rejection at only 50% recovery.
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #6 on: February 14, 2007, 11:30:37 pm »
I have already ordered a 4040 Highpressure membrane.

Where can I get that Myer pump?
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Shawn Gavin
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JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #7 on: February 14, 2007, 11:37:11 pm »
hold on I'll get you the webpage now
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Ballymena N.I

JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #8 on: February 14, 2007, 11:45:40 pm »
http://www.femyers.com/products/sse/sse_mpb.html

not sure if you can buy them off the site above, we get them from a local supplier
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #9 on: February 14, 2007, 11:49:24 pm »
thank you
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Shawn Gavin
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JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #10 on: February 14, 2007, 11:52:13 pm »
that'll be a fiver thanks.
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #11 on: February 14, 2007, 11:55:14 pm »
its in the mail.

there is a pump over here that is like that but the psi is only about 200, not 300
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Shawn Gavin
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JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #12 on: February 15, 2007, 12:01:26 am »
200psi is fine, just make sure it has a high enough flow and is rated for CONTINUOUS USE
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #13 on: February 15, 2007, 12:04:50 am »
All I have ordered so far are the membrane, housing, sediment, carbon filters and there housings.

Will be piecing this thing together slowly as spring arrives.

Couldnt pass up the price I got on the 4040 though.
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Shawn Gavin
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JM123

  • Posts: 2095
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #14 on: February 15, 2007, 12:13:28 am »
how much?
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #15 on: February 15, 2007, 12:21:07 am »
4040 with a stainless steel housing for $350.00 US dollars
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Shawn Gavin
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JM123

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Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #16 on: February 15, 2007, 12:26:19 am »
no way! where you get that from??
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #17 on: February 15, 2007, 12:26:48 am »
whats your email address?
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Shawn Gavin
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JM123

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Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #18 on: February 15, 2007, 12:31:42 am »
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Ballymena N.I

U.S. wfp USER

  • Posts: 313
Re: Low Pressure Vs. High Pressure RO Membranes
« Reply #19 on: February 15, 2007, 12:35:46 am »
mail sent
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Shawn Gavin
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