Your Cart

Shopping Cart Items: 0   Sub-Total : US$0.00    View Cart    Checkout
Shopping Cart Items: 0   Sub-Total : US$0.00
Welcome, Guest ( Login )
Celebrating 34 years providing high quality products and advice.
Our Local Time Is 9:41:43 AM.
Call us at 818-786-0600. We are here to help!
Millipore and Barnstead Laboratory Water Filtration Need a New Laboratory Water System?
We have many to choose from. We can save you thousands on
Complete Systems and replacement filters for most brands.
Laboratory Water Systems Laboratory Process Filters Laboratory Equipment Water Treatment
APS TechNotes See all articles

Reverse Osmosis Systems Flow Rate Changes With Temperature

TEMPERATURE CORRECTIONS
(Data Normalization for a Reverse Osmosis Membrane Element)


The Basics : As water gets colder is gets thicker and the flow rate out of a membrane is lower. As water gets warmer it gets thinner and the flow rate coming out of a membrane increases. All flow rates stated on reverse osmosis systems and membranes are assuming a water temperature of 77F. As the water temerature changes so will the flow rate.

For every degree F you lower the temperature you lose about 3% of product flow. For every degree F you raise temperature you gain about 3% product flow rate.  

There are two key factors affect the performance of a Reverse Osmosis membrane and should always be considered when evaluating the system.  The temperature of the feedwater and the net driving pressure across the element both indicate whether the system or the membrane is in optimum operating condition or needs replacement.  Use the information below to calculate the affects of these two factors.

Temperature Correction Factor (TCF)

Temperature has an inverse affect on product flow through the membrane; a high temperature increases product flow, a low temperature decreases product flow. All Reverse Osmosis membranes and systems are rated at 25ºC (77ºF).  To find the membrane permeate rate at another temperature, follow these steps:

Find the temperature correction factor (TCF).

Divide the rated permeate flow by the TCF. The result is the permeate flow at the desired temperature.

TEMPERATURE CORRECTION FACTORS (TCF)


Temp/Thin Film/Celulose


Temp/Thin Film/Celulose
Open To The Public

Why Use APS??

Independent Reps Wanted

Need Live Help?

Contact Us
818-786-0600

Short Lead times.
Lab Water Deionizer




P12XL4
APS Polaris XL 4 Lab Water System

Retail Price : US$6,499.00
Todays Price : US$4,650.00



P2D2-M
APS Polaris D2 Water System with Quality Meter

Retail Price : US$2,966.00
Todays Price : US$2,570.25



P2D3-M
APS Polaris D3 Water System with Quality Meter

Retail Price : US$3,496.94
Todays Price : US$2,830.20



P2D1-M
APS Polaris D1 Water System with Quality Meter

Retail Price : US$2,118.94
Todays Price : US$1,761.72
PreviousNext
APS Polaris XL 4 Lab Water System
APS Polaris XL 4 Lab Water System


TAKING PRE-ORDERS
Short lead Time. 


This high capacity four housing lab water system is designed to provide up to 3 l.p.m. of ultrapure water exceeding ASTM and CAP Type I, II or III specifications.

See all Polaris Systems Here

PROUDLY MADE IN THE USA


US$4,650.00 Details
APS Polaris D2 Water System with Quality Meter
APS Polaris D2 Water System with Quality Meter

This dual housing water system is designed to provide 1 g.p.m. of ultrapure water exceeding ASTM and CAP Type II specifications.  

Comparable to Barnstead D4521

Operating Manual

See all Polaris Systems Here


PROUDLY MADE IN THE USA

Dimensions :  18" W X 28" H X 6" D

US$2,570.25 Details
APS Polaris D3 Water System with Quality Meter
APS Polaris D3 Water System with Quality Meter

This high capacity triple housing is designed to provide 1 g.p.m. of ultrapure water exceeding ASTM and CAP Type II specifications.  

Operating Manual

See all Polaris Systems Here


PROUDLY MADE IN THE USA

Dimensions : 23" W X 28" H X 6" D

US$2,830.20 Details
APS Polaris D1 Water System with Quality Meter
APS Polaris D1 Water System with Quality Meter

This compact single housing is designed to provide 1 g.p.m. of ultrapure water exceeding ASTM and CAP Type II specifications.  

Comparable to Barnstead D4511

See all Polaris Systems Here


PROUDLY MADE IN THE USA

Dimensions : 12" W X 28" H X 6" D

Operating Manual

US$1,761.72 Details
PreviousNext

Best
Lab Water System




50132374
Barnstead MicroPure UV-ST

Retail Price : US$7,060.00
Todays Price : US$6,283.40
PreviousNext
Barnstead MicroPure UV-ST
Barnstead MicroPure UV-ST

Barnstead MicroPure Laboratory Water Purification System - Provides Type I Ultrapure Water.

Systems come with the filters.

Replacement filters

This is the replacement for the popular EasyPure UV RF systems.

Operating Manual

US$6,283.40 Details
PreviousNext

Top Sellers




MB1801
High Purity Mixed Bed Deionizer

Retail Price : US$221.00
Todays Price : US$149.80



GSX28
O-RING 4.190IDX.139 EPR 50

Retail Price : US$17.45
Todays Price : US$14.97



D0809
CARTRIDGE ULTRAPURE SPG

Retail Price : US$214.00
Todays Price : US$190.46



Res Care-G
Pro Res Care Cleaner Chemical Case of 4

Retail Price : US$152.85
Todays Price : US$113.22



CF10D1
Activated Carbon Filter

Retail Price : US$25.65
Todays Price : US$19.04



SB1801
High Capacity Dual Bed Cartridge Filter

Retail Price : US$205.00
Todays Price : US$143.50



D50237
Barnstead Easy Cool Filter - Upflow

Retail Price : US$97.80
Todays Price : US$90.95



HC19H1-D
IWT 3C0600002 Style High Capacity Filter - Cartridge Universal II

Retail Price : US$135.06
Todays Price : US$106.25
PreviousNext
High Purity Mixed Bed Deionizer
High Purity Mixed Bed Deionizer

Removes ionic contamination from water.

Comparable to Barnstead D0809 and D5027 Ultra Pure Mixed Bed Filter. vp-17-4010

US$149.80 Details
O-RING 4.190IDX.139 EPR 50
O-RING 4.190IDX.139 EPR 50

Factory Original - Use with E-pure, B-Pure and Nanopure Quad systems and housings only. 1/pk AKA GSX-28



US$14.97 Details
CARTRIDGE ULTRAPURE SPG
CARTRIDGE ULTRAPURE SPG

Barnstead Brand Filter
Comparable to APS Ultra Brand MB1801 filter cartridge, D0808 and vp-17-4010

US$190.46 Details
Pro Res Care Cleaner Chemical Case of 4
Pro Res Care Cleaner Chemical Case of 4

Case - 4 ea 1 gallon bottles. Same as Res-Up
Chemical Feeders
Pro-Res-Care is the pro version Res-Up.
This item can not be shipped by air freight.

US$113.22 Details
Activated Carbon Filter
Activated Carbon Filter

Code F, 2.5 inch X 10 inch. Coconut shell carbon block with 10 micron outer wrap. Special Prep 1, for Chlorine removal with low extractable applications - 1/pk
Filter Housing

US$19.04 Details
High Capacity Dual Bed Cartridge Filter
High Capacity Dual Bed Cartridge Filter

Reduces dissolved inorganic contamination.

Comparable to Barnstead D0803 and Harvey AY1273X4 High Capacity Filters.

US$143.50 Details
Barnstead Easy Cool Filter - Upflow
Barnstead Easy Cool Filter - Upflow

Easy Cool Deionizer Filter - Comparable to APS ULTRA Brand EF06U1

US$90.95 Details
IWT 3C0600002 Style High Capacity Filter - Cartridge Universal II
IWT 3C0600002 Style High Capacity Filter - Cartridge Universal II

This High Capacity Mixed Bed Deionization Filter is used for the reduction of dissolved minerals. with Color Indicator - Comparable to IWT and US FILTER 3C0600002 and HC200 or HC-200

US$106.25 Details
PreviousNext

Most Popular
Fume Hoods




100400000
4' Protector Premier Laboratory Hood

Retail Price : US$10,555.00
Todays Price : US$9,499.50



100400020
4' Protector Premier Laboratory Hood

Retail Price : US$10,555.00
Todays Price : US$9,499.50



100400021
4' Protector Premier Laboratory Hood

Retail Price : US$11,660.00
Todays Price : US$10,494.00



100400060
4' Protector Premier Laboratory Hood

Retail Price : US$13,630.00
Todays Price : US$12,267.00
PreviousNext
4' Protector Premier Laboratory Hood
4' Protector Premier Laboratory Hood

Labconco Brand Product

US$9,499.50 Details
4' Protector Premier Laboratory Hood
4' Protector Premier Laboratory Hood

Labconco Brand Product 

US$9,499.50 Details
4' Protector Premier Laboratory Hood
4' Protector Premier Laboratory Hood

Labconco Brand Product - with 2 service fixtures

US$10,494.00 Details
4' Protector Premier Laboratory Hood
4' Protector Premier Laboratory Hood

Labconco Brand Product - with built-in exhaust blower

US$12,267.00 Details
PreviousNext

Glassware Washers




4595600
Upper Spindle Rack

Retail Price : US$3,385.00
Todays Price : US$3,046.50
PreviousNext
Upper Spindle Rack
Upper Spindle Rack

LabConco Brand Product

US$3,046.50 Details
PreviousNext

Best New Product
Lab Water Reverse Osmosis System

Lab/Commercial
Reverse Osmosis System
Great for Lab Water Pretreatment
or Great Drinking Water
Images are representative of the products. Images may or may not be of the actual product. If it is important e-mail us for an actual image if available.

* Flat Rate UPS shipping when able to ship via UPS and is in the USA excluding Hawaii and Alaska.
Larger Items may not be able to ship via UPS, in that case freight charges will be quoted seperately.
International shipping will be quoted after the order is placed. You will have the opportunity to cancel before we finalize your order.

Terms and conditions
Credit Application
Privacy Policy
Google Apps
List All Products