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Pretreatment Solutions Blog

For over 9 years, Nalco Pretreatment Solutions has been presenting a unique perspective on the water industry, systems and technologies, from very technical applications information, to general business topics. Our overarching themes include Safety, Saving Energy, Saving Time, Saving Water, and how our Services, Systems and Replacement Parts achieve these goals. On a routine basis, we add information on our services, systems and replacement parts and show how they are important to your company.

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Discontinued DOW FILMTEC™ RO and Nanofiltration Products >

While working on adding Dow Filmtec membranes to the Nalco eCommerce site, I came across this interesting list of discontinued FILMTEC™  RO and NF products on the Dow Filmtec website.  Before you consider substituting an older Reverse Osmosis or Nanofiltration membrane for a new version, contact us to run a projection on your system to determine if you will continue


Rebranded, Redesigned and Responsive Website >

Recently, we completed a redesign of our website and rebranded it as Nalco Pretreatment Solutions part of Nalco | An Ecolab Company.  This project was particularly interesting because Nalco wanted Res-Kem to retain the first page Google ranking for over 20 keyword search terms that Res-Kem dominates in the industrial water treatment market. Using best practices, we have been successful. Also,


RO Membrane Cleaning-Offsite >

If you have an RO system, periodically you will need to clean your membranes. We can provide off-site membrane cleaning services that are designed to improve the performance and extend the useful life of your RO elements. Using our proprietary off-site membrane cleaning stations, strict protocol, automation, and specialty cleaning products, we can handle your


Teaching People What They Need >

My normal focus in this blog is water treatment.  I am going to take a tangent today because my favorite blogger, Seth Godin, had a very interesting post last week titled “Give the people what they want” and the next line was “…isn’t nearly as powerful as teaching people what they need.” His posts are always thought provoking


Selecting the Perfect Filter Cartridge >

Being a distributor of water treatment supplies, we are asked to provide filter cartridges. Most of the time, these requests will consist of: “Hey, I need a 5 micron 20″ long cartridge.” Sounds simple enough; however, there’s more to a filter cartridge than the just those two particular pieces of information. Below is an overview


Finally Available! – Stainless Steel Resin Traps >

After many requests, Res-Kem now has stainless steel resin traps available!  So, in addition to our standard PVC and CPVC resin traps, we now offer them in 304SS and 316SS. 304 Stainless Steel Traps Each Rated for 210 gpm Flow The end connections have Van Stone Flanges for maximum installation flexibility.  All stainless steel units


1.4 MILES of Wire Saved Through Innovative PLC Architecture >

… and over 800 electrical and 40 instrument air connections! The field wiring for our customer became very complex because they wanted verification that each of the twenty actuated valves is in the correct position.  Also, the system is pre-programmed to allow up to four additional greensand filter units through a HMI touchscreen. If the


10 Questions to Answer Before You Specify Water Treatment Equipment >

Many times per day, we are asked to provide a quote for a specific water treatment technology like RO, demineralization, water softening, filtration, etc.  At Res-Kem,  we like to take a step back and help you determine what equipment will cost effectively handle your water treatment issue.  Since there are so many choices and combinations


Condensate Polisher Shipped to New Jersey University >

Last week, Res-Kem shipped a condensate polisher to a New Jersey university.  This condensate polisher will be installed as part of a new onsite power production facility at the university operated by an independent energy development company.  They will produce power for the university under a DBOM (Design, Build, Operate, Maintain) agreement. Excess power produced


Condensate Polishing System Shipped to University in Rhode Island >

A condensate polisher was shipped last week to a university in Rhode island to treat their steam condensate to save energy, reduce water usage and reduce water treatment chemical usage. Res-Kem Dual Tank Condensate Polishers Designed to Treat a Maximum of 300 gpm   What is the Res-Kem water treatment application? Sodium cycle condensate polishing


Ultrapure Water System Starting Up at Nanotechnology Center in Philadelphia >

Res-Kem supplied, to a new nanotechnology center in Philadelphia, an ultrapure water system. The start up will commence this Monday. The system is designed to produce water with three different qualities to supply: 10 gpm to process cooling equipment 40 gpm to laboratory benches and humidification equipment 75 to 125 gpm to recirculation loop feeding process tools Ultrapure Water System


Second Condensate Polishing System Shipping to a North Carolina University >

Res-Kem is shipping the second of two condensate polishing systems to a leading private university in North Carolina next week.  This is the second of two systems sold to this same university in the past year and a half.  This system treats 400 gpm of dirty condensate. Res-Kem’s Dual 54 inch Sodium Cycle Cycle Condensate Polishers To improve


Chloramine Removal With Catalytic Carbon >

Is your carbon under attack? Have you chosen the correct carbon for chloramine removal? What carbon makes the most effective final barrier against chloramines?   Why use chloramination?  Let’s face it everyone, they’re not making any more fresh water on this planet. Our fresh water is under continuous attack from man made substances and biological


DI System Shipping to Washington Chemical Plant >

Shipping today is a two bed (cation ion exchange tank followed by an anion ion exchange tank) demineralizer for a chemical plant in Washington State. This unit is a DI60072 and will be used in parallel with several other older systems currently installed at the same plant to increase treated water capacity. 150 gpm Demineralizer


Downloadable Catalog of Water Treatment Equipment Updated >

For 2012, we updated our downloadable industrial water treatment catalog.  (Given the number of equipment choices we provide, the catalog file is very large, so please be patient during the download.) Res-Kem’s Industrial Water Treatment Equipment Catalog for 2012 In addition to the updated XL, CL and ML Series RO system bulletins, we have updated the two


Q&A on Condensate Polishers with Res-Kem’s Kevin Preising >

While dirty condensate clean-up can be an energy buster in most processing plants, one cost effective solution is to polish contaminated condensate for re-use. Condensate polishers use a simple ion exchange technology that is easy to operate, easy to maintain and economical to use – less make-up water is required which leads to lower chemical


New Two Bed Demineralizer Technical Bulletins >

Res-Kem has a complete 2-Bed demineralizer product line designed for industrial water production.  The standard tank sizes range from 18″ to 96″.    Two-Bed Demineralizer withPVC Tank Coating and PVC Face Piping These two-bed deionizers are designed for fully or semi-automatic production of water with a conductivity of less than 10 micro-ohms and feature:   Flow rates


Condensate Polishing & Maintaining Quality Boiler Water >

Maintaining proper boiler water quality can be both costly and complicated when faced with navigating ASME boiler water guidelines. One cost effective solution is sodium cycle condensate polishing. Simple to operate and maintain, condensate polishers have been proven to realize real savings relative to chemical and energy consumption and provide the ability to control corrosion transport


Condensate Polisher Ready for Shipment to Chemical Plant in Louisiana >

Res-Kem will be shipping a condensate polisher to a chemical plant in Louisiana in a two days.  This system will be used to treat condensate to save water treatment chemical costs, identify process equipment leaks and will likely improve product quality of the chemicals they produce. What is the problem? The chemical plant uses steam


Water Softener Shipped to Food Flavorings Company in New Jersey >

Res-Kem recently shipped an industrial water softener to a food flavorings plant in southern New Jersey.  The water treated by the water softener is used to make steam to sterilize the raw plant material prior to extraction and extract the flavoring.   The softener will be a replacement to an existing tank which has failed after 40 years


Validatable Water System for New Jersey Pharmaceutical Company Shipped >

We were recently asked to provide a DI water system for a central NJ Pharmaceutical company. They required a small amount of water for a batching operation, 50 – 60 gallons per batch 3 to 5 batches per day. Their requirements were that the water would have to meet USP specifications and that the system


Reduce Your Backwash Flow or Lament “Why is my ion exchange resin in the drain?” >

It is that time of year.  You must reduce your backwash flow in the Fall or you will find your ion exchange resin in the drain or waste treatment plant. Why do I need to reduce my backwash flow rate? If the backwash rate for an ion exchange system is set when the water is warm, the flow


3D CAD Drawings for Condensate Polishers for University in Massachusetts >

In order to speed installation of the condensate polishers we recently shipped to Massachusetts, Res-Kem was asked to provide 3D CAD files for the condensate polishers.  Here are some screenshots of these drawings. Why use 3D CAD? Given the complexity of the installation, tight dimensions and tight timeline, the 3D drawing helps the mechanical contractors understand


Ultra Filtration – The Membrane Problem Solver >

There are very few innovations in the water treatment market these days. Sure the electronic controls have gotten more intuitive and compact, that is about it. Ion exchange hasn’t really made quantum leaps into this either. So before I depress my fellow colleagues and influence young people to seek another career path, there is one exciting


Ion Exchange Resin Testing & Analysis Services >

Test your ion exchange resin to monitor and maintain your water treatment systems such as softeners, dealkalizers, condensate polishers, deionizers or demineralizer systems. You should have the resin analyzed on a yearly basis to check the quality and performance of the resin. Samples can be taken from the resin bed and sent to Res-Kem to


Fleck Valved Multiple Tanks -“What’s Your System Number?” >

The Problem: Many water treatment end users can wind up inheriting an orphaned treatment system. Usually it was part of a package supplied by a car wash or a boiler treatment company. The situation becomes more confusing when there are multiple tanks with elaborate wiring and piping that resembles knotted intestines. Also, the owners manual


Trailer & Skid Mounted Mobile Water Treatment Systems Available >

Res-Kem, in association with our parent company, Nalco, now offers many different mobile water treatment system options. Whether you need supplemental water for short-term shortages, temporary water while waiting for a new system to be delivered, or improved water quality due to a change in feedwater, we can provide the mobile options to meet your


Common Cation Ion Exchange Resin Foulants >

We are often asked to help with an ion exchange system that no longer has the same run length as when it was new. Typically, this is the result of either reversible or non-reversible fouling of the cation and/or anion ion exchange resin. These are some of the common foulants: Iron: Clear Water Iron (ferrous


AquaMatic Valves-Normally Open or Normally Closed…That is the Question >

One of the most confusing concepts of Aquamatic Valves is trying to determine from the customer if the valve is normally open or normally closed. What seems to confuse most customers when asked this question is how the valve functions on their system. For example, Res-Kem Water Softeners, for the most part, use a Normally


Activated Carbon-“That Old Black Magic” >

Activated carbon is an amazing product. Its ability to purify and remove contaminants seems limitless. However, few people know what activated carbon really is or how it’s manufactured. One of my goto articles on the subject, written by Calgon Carbon, is “Activated Carbon. What is it, How Does it Work“. What is activated carbon made


Condensate Polisher Shipped to a Virginia University >

This past month, we have built and sent another condensate polisher to a major university in Virginia. This stainless steel system with carbon steel piping is designed to treat 175 gpm and designed to operate at 100 psig and 200 F. The system has dual ASME-code 36 inch diameter tanks. The piping is Schedule 80


Corroding Condensate Polishers >

I have written several posts about Res-Kem’s reasons for manufacturing our condensate polishers in stainless steel. Here are two lessons why this is important. What happened? Within the past two weeks, we have been contacted by two different facilities managers who purchased sodium cycle condensate polishers from companies other than Res-Kem. The tanks on their


200gpm Condensate Polisher for Major Chemical Company >

Res-Kem will be shipping a 200 gpm condensate polisher for a large chemical company later this week. Using our standard all stainless steel condensate polisher design, the system was customized to meet the customer’s specific requirements. The tanks are ASME code tanks with a design pressure of 125 psig. All piping is welded stainless steel


Condensate Polisher ROI Presentation >

Reuse It – Don’t Lose It! The Economics of Condensate Polishing was presented at the GlobalSpec Industrial Processing virtual tradeshow on August 25, 2010. It is a rather long presentation so we posted in two pieces on YouTube. Abstract of Presentation: In today’s environment of economic pressure and high energy costs, engineers are constantly asked


Presentation on Condensate Polisher ROI >

As I alerted in a previous post, Kevin Preising of Res-Kem gave a webcast entitled “Reuse It or Lose It – The Economics of Condensate Polishing”. This excellent webcast was given at the GlobalSpec Industrial Processing virtual trade show on August 25 showing how a condensate polisher can pay for itself in 9.6 months! You


Economics of Condensate Polishing >

On August 25, 2010, Res-Kem’s Kevin Preising will make a presentation entitled “Reuse It – Don’t Lose It! The Economics of Condensate Polishing” as part of the Industrial Processing on line tradeshow presented by GlobalSpec. Abstract of Presentation: In today’s environment of economic pressure and high energy costs, engineers are constantly asked to do more


Softener Service at Power Plant in New Jersey >

After reviewing our blog posts over the past 4+ years, I realized we have not talked much about our site service team. Our normal service area is in New Jersey, Eastern Pennsylvania, Delaware, and Maryland. On a case-by-case basis we have gone substantially further. Situation: At a power plant in coastal New Jersey, a triple


Triple Greensand Plus Filter for Iron and Manganese Removal >

A triple Greensand Plus filter for iron and manganese removal was assembled and shipped today. This skid-mounted system will be installed to treat the water for a small community water system in the Poconos operated by a large private water utility company. The system operates in a parallel arrangement with three skid mounted, Greensand Plus


Dealkalizer Performance Calculations >

We recently had questions about a perceived problem with a dealkalizer. This customer believed the capacity of the dealkalizer was lower than originally specified and was unhappy with its performance. The customer was regenerating this new system more often than they regenerated the older system. We reviewed the system design and operation and found the


Pentair Fleck Electronic Timers >

Fleck has been moving quickly with upgrades to their electronic timers, which has created confusion over which is the latest one and which valves accept which timers. Is it ET, SE, XT, NT, NXT? By the time you read this there may be a more recent upgrade to the family of Fleck electronic timers. So,


Aquamatic Valve & Control Lines Discontinued >

In addition to the announcement of the A200 series impulse control stager being discontinued, the letter from Pentair has other Aquamatic discontinuations. The following Aquamatic Valve & Control Lines will be discontinued after March 13, 2009. Also, certain Aquamatic Valve & Control options will be discontinued after March 13, 2009. Orders can be placed until


A200 Stager Control from Aquamatic Discontinued >

Soon after we completed changes to our website, discussed in our previous blog post, a discontinuation notice was Res-Kem just received in the mail from Aquamatic about the A200 Stager Control. After March 13, 2009 the controller, also called an A200 Impluse Stager Control, will no longer be available. The reason given was “despite their


Aquamatic Stager Controls Information for GE/Osmonics >

Res-Kem has a significant amount of information on Aquamatic Stager Controls on this website. We wanted to make the information more easily accessible for our customers and others who use Aquamatic stager controls in their water treatment equipment. Res-Kem uses Aquamatic Stager Controls for many of the systems we manufacture. Stager controls are used to


Triple Softener System for Steam Heat Peaking Plant Sized for 750 gpm Flow >

Here is another example of number of the industrial, commercial, residential, and/or residential water treatment systems being designed, assembled, shipped and installed by Res-Kem engineers, pipefitters, and/or contractors within in the past few months. A Boston steam heating company needed to replace their aging Permutit triple softening system. These units, with Permutit multiport valves, had


How to Measure pH Accurately in Steam Condensate >

Keeping within ASME guidelines for total iron in boiler feedwater below 0.1 ppm and total copper below 0.05 ppm copper requires attention to the maintenance of steam traps, knowledge of the metallurgy of the steam/condensing equipment in the steam distribution system and in particular the pH of return condensate. When measuring pH in condensate, it


Uniform Particle Size Ion Exchange Resins >

We received notice today that Purolite Ion Exchange Company will no longer be selling the anion resins, A-300 and A-400. These resins will be replaced by Purofine PFA-300 and PFA-400. The Purofine line of resins is uniform particle size (UPS). Dow did this a number of years ago when they introduced the Marathon grade of


Setting Brine Tank Refill Time on Fleck Softener Valve >

The Pentair® Fleck® multi-port softener valve controllers, electronic versions SE, XT, XTR and SXT and non-electronic versions, are very flexible allowing for customization of the regeneration cycle of the water softener. This flexibility requires that you know a little bit about the system and a simple calculation -“Brine Refill Time”. Although a simple calculation, “Brine


Type II Anion vs Type I Anion: Ion Exchange Resin Analysis Yields Regeneration Savings >

Res-Kem is a supplier of ion exchange resins from several vendors including Purolite. Res-Kem is often asked to diagnose a potential ion exchange resin problem. Depending upon the resin type, cation, anion, or mixed bed, cost and length in service, it may make sense to sample the resin and test for parameters that can identify


Activated Carbon: Mesh Size >

We are often questioned about the differences between 1240 (12 by 40) mesh activated carbon and 830 (8 by 30) mesh activated carbon. The 1240 mesh activated carbon is smaller than the 830 activated carbon. The screens or the mesh sizes are different. The 12 mesh screen has 12 openings per square inch 12 across


FILMTECTM BW30LE-440 and BW30LE-4040 RO Elements to be Discontinued >

The Dow Chemical Company recently sent a discontinuation notice for the FILMTEC BW30LE-440 and BW30LE-4040 which have been an industry standard for many years. Dow will not take orders for the current LE elements after May 30, but will honor any orders on the books even if shipment is not until the end of the


Condensate Polisher Vessel Materials of Construction >

We often receive the following question about the materials of construction of condensate polisher vessels. Question: We’re considering a condensate polisher in our boiler plant. Should the vessel be constructed of carbon steel or stainless steel? Answer: Over 75% of the condensate polishers that Res-Kem builds utilize stainless steel pressure vessels. If you use a


Aquamatic Valve Selection and Pricing >

A common inquiry we receive at Res-Kem is a customer looking for a price and delivery on an Aquamatic Valve. We, in turn, ask the customer the following: What kind of Aquamatic valve is used on the equipment? Is the valve normally open, or is it normally closed? Does it have a limit stop or


Water Testing Services Offered >

Before purchasing any water treatment equipment, the first piece of information a person should obtain is a water analysis. The challenge is you want a quick, independent test at an affordable price. While we can not vouch for it at this point, an employee may have found a reliable third party testing service for Pennsylvania


Solo and Solomatic Valves from Aquamatic >

Over many years most water treatment equipment manufacturers utilized various types of multiport valves for their water conditioning equipment, including water softeners, dealkalizers and filters. One of these valves were known as Solo(R) Valves and Solomatic(R) Valves manufactured by Aquamatic(R) Inc., now a part of GE Water. These Solo and Solomatic valves, once a staple


Condensate Polisher with All Stainless Steel Construction >

Last week, Res-Kem shipped a condensate polisher designed to treat an 80 gpm flow rate with a 390,000 grain capacity. The condensate polisher had an all stainless steel construction including an ASME code stainless steel pressure vessel, stainless steel internals, stainless steel Aquamatic valves and face piping. Not shown is the brine tank used to


Ion Exchange Resin Equivalency Chart >

There are many different ion exchange resin manufacturers including Purolite, Dow, Sybron/Bayer, Thermax, Rohm and Haas and ResinTech. We are often asked to provide a resin that is the closest equivalent to the ion exchange resin they have or need to purchase. This is a Resin Equivalency list we use internally of the most common ion exchange


Boiler Feed Water Flow Rate Requirements Chart >

Question: We received a request for proposal today for “a water treatment system to treat the water going into my dual 194 HP steam boilers”. Start of an Answer: The first thing we need to do is estimate the amount of water that will be used. The question is how? After you work in any


Problems with a Bruner(R) Softener Multi-Port Valve >

Here are some common problems we see with very old Bruner(R), Bruner-matic(R), and Culligan(R) Hi-Flo (TM) multi-port valves. A recent request for help prompted this posting. Problem: I have an old Bruner softener with a large cast iron multi-port valve. Here are some of the issues: Periodically my brine tank overflows My runs seem to


How Does a Softener Valve Nest Work? >

The “valvenest” for a water softener is made of a minimum of six valves. The easiest way to understand how the water and brine flows through the valvenest is to see this picture. The top flange attaches to the upper side port of the softener tank. This in turn connects to the top distributor. The


My backwash flow rate is too high for my well and well pump >

A common design issue for sand filters, multi-media filters, greensand filters, arsenic removal units, etc. is the large difference between the backwash flow rate and the flow rate during normal operation. Depending upon the media used, the backwash flow rate can be 2X to 10X the service rate. Due to restrictions in the piping coming


What is an Empty Bed Contact Time (EBCT)? >

Question: We receive many questions on calculating the Empty Bed Contact Time as follows: “How do I calculate the “Empty Bed Contact Time” for sizing my carbon bed?” Our Answer: Calculating the Empty Bed Contact Time, EBCT, is fairly easy to do once you know that the EBCT has the units of time, and usually



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Nalco Pretreatment Solutions (PTS) is a leading manufacturer and supplier of services, systems and supplies for industrial and commercial water pretreatment systems for treating process water, product water, boiler pretreatment, and drinking water.
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