Tuesday, January 12, 2010

Deionizer/Demineralizer System with Packaged Design Introduced

Res-Kem recently introduced packaged DI Water Systems for Commercial and Light Industrial applications. The OHM-TECH Series two-bed deionizers for commercial and light industrial applications are designed for semi-automatic production of water with a conductivity of less than 10 micro-ohms and feature:

  • Flow rates from 1 - 40 gpm
  • Ion exchange Capacities from 9,000 - 90,000 grains.
  • Strong acid cation and type 1 strong base anion resins.
  • Microprocessor based control system with conductivity monitor and flow sensor for regeneration initiation.
  • Corrosion resistant fiberglass electrical enclosures which reduces maintenance costs.
  • Resin vessels are polyethylene-lined fiberglass.
  • ASME code vessels.
  • Factory assembly and skid mounting for quick installation and minimum startup cost.
  • Schedule 80 PVC piping package using a multi-function hydraulically operated composite valve.
  • Metering valves for accurate and safe control of regeneration water and chemical introduction.
  • Internal distributors are corrosion resistant, designed for optimum efficiency.

These following facilities are examples of ideal applications for Res-Kem's demineralizer and deionizer (DI) equipment:

  • Food and Beverage Processing Plants
  • Power plants
  • Chemical plants
  • Pharmaceutical Plants
  • High pressure boiler feedwater
  • Manufacturing Plants
  • Laboratories
  • Autoclaves
  • Steam Generators
  • Electronic Products
  • Medical Device Production
  • Alloy Metal Fabrication
  • Aerospace
  • Humidification Systems
  • Metal Treating
  • Plating
  • Printed Circuit Boards

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Wednesday, September 16, 2009

Residential Water Treatment Training Program at Res-Kem

It was a very eventful time here at Res-Kem the past few days in training. I learned about various resins and how certain chemicals react together depending upon their positive or negative charge. I also learned how complex carbon is and how different it can vary in quality. I have a better understanding on how water treatment units are sold through independent dealers and through franchises. I learned about the physical attributes of water treatment units. Learning about mechanical and electronical interfaces on valves gave me sufficient insight on the technological advancement in the Residential sector. Understanding how the quality of water in Residential can effect people's lives is very interesting.
Pentair Fleck 7000XTR valve for Residential and Light Commercial Applications
One of the most interesting things I observed this week was the processes Res-Kem employees must maintain in order to help move this company forward in the water treatment industry, while serving the general public.

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Thursday, May 28, 2009

Industrial Water Softener Maintenance

Res-Kem Corp. and our sister company General Water Services offer preventative maintenance contracts for customers here in the Mid-Atlantic region. I thought it might be helpful to go over our Preventative Maintenance procedures for a commercial or industrial water softener for those of you who maintain your own water softening equipment.

Dual tank industrial water softener using multiport valves assembled by Res-kem Corp. of Aston, PA.
For an industrial water softener we suggest our customers have bi-annual visits by our technicians. It's a very simple inspection that can prevent unscheduled downtime and the associated problems. How often our customer tests the water hardness is largely determined by how critical the application is and the availability of staff. We strongly suggest testing the water hardness on a daily basis if possible.

Res-Kem service technicians do a mechanical inspection that includes the following:
Inlet and Outlet Water Hardness - When we specify a commercial or industrial water softener we are given a water analysis, the average, high and low flow rates, hours of operation, and desired end-point. It's important to note changes against the design specification. If all things are equal, seeing hard water at the outlet points to a mechanical problem with the water softener (or no salt in the brine tank). If something else has changed - flow rate is lower or higher than specified or the inlet water hardness has increased - our technician will review the data with our engineering department and discuss the problem in greater depth with the customer.

Inlet and Outlet Pressures - Pressure testing is done when the water softener is running at the design specification. If there is a high differential the water softener might be running at too high a rate. If the water softener is running at a typical flow rate, (10 – 15 gpm/ft2) and there is a high differential pressure, the resin bed could be plugging up and preventing the water from flowing through the softener correctly. The differential pressure across a softener resin bed should generally run less than 15 psig. Of course there are many factors, which can result in higher differential pressures, i.e. depth of the resin bed, design of the internal distribution, age of resin, etc.

Inlet Chlorine (in absence of carbon filter or bi-sulfite feed) - Chlorine will break down cation ion exchange resin. Exposure to significant amounts of free chlorine, "hypochlorite" ions, or other strong oxidizing agents over long periods of time will eventually break down the crosslinking. Over time the cation resin turns to mush and will plug up the bed or eventually be flushed out so there remains much less resin than required.

Check salt level in brine tank, add if necessary

Make Note of Leaks - Our technicians are trained to look carefully for that small drip. We'll fix it if possible while we're there, otherwise we will make an appointment to come back to service the problem. You should have gaskets in on hand for both the manway and handhole openings.

Make Adjustments to the Control Valve - You should have received an operating manual with the water softener which includes information about the system settings.

  • If outlet water is out of hardness specification adjustments may be necessary.

  • Verify water softener timer is set to correct time and day.

  • Recalculate how often the water softener should be regenerating based on hardness and gallons and adjust control as necessary.

  • Optional Annual Maintenance

    Valve Maintenance - There are many different types of controls and valves used on a commercial industrial water softener. In general you will need the following parts on hand to perform this service:

  • Aquamatic Valve Nest Systems - Diaphragm & Seal Kits, Internal Parts Kits, Seat Tools and Shaft Tools.
    Valve nest using Aquamatic valves for a industrial water softener

  • Fleck Top Mounted Control Systems - Upper and Lower Seal & Spacer Kits, Top Piston Kit, Lower Piston Kit.

  • Autotrol Top Mounted Control Systems - Internal parts kits. Specific kits depend on valve type.

  • Ion Exchange Resin Test - Although softener resin will last significantly longer than deionizer resin, in the presence of chlorine or other oxidants it will break down. If your water is highly chlorinated or has other contaminants such as iron, you should test the resin within 18 to 24 months of start up and every year thereafter. Otherwise, test the resin after the third year and then every year thereafter. By doing so you will know when to budget softener resin replacement as it is often a major expense.

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    Monday, May 04, 2009

    Resin Traps-Insurance for Industrial Water Systems

    Recently, Res-Kem published a white paper entitled "Inexpensive Insurance for Water Treatment Systems-Resin Traps" by Ron Madden. In this white paper, three examples demonstrate how resin traps act as inexpensive insurance for costly problems that can develop when ion exchange resin reaches downstream process areas, process equipment, or the product. Depending upon the plant or process, the payback can be nearly instantaneous!

    Resin Trap installed in containerized deionized water treatment vesssels to protect downstream process in a Philadelphia region refinery
    A simple resin trap, long favored by experienced operators of water treatment
    equipment, is an inexpensive form of insurance being used more frequently in water treatment systems. Should an internal lateral break or otherwise fail, resin traps eliminate the possibility of ion exchange resin or other filtration media leaving water treatment equipment where it belongs, and prevent it from traveling downstream where it does not belong. Install a resin trap. Like insurance, do not wait until catastrophe strikes to see the value.

    The three examples are from:
  • An automotive plant where the resin trap was installed AFTER a plant shutdown
  • A poultry plant where the resin trap was installed AFTER a plant shutdown and quarantine of millions of pounds of processed chicken
  • A refinery installed BEFORE a problem occur ed
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    Wednesday, March 18, 2009

    General Water Services Website Finished

    The General Water Services website, www.generalwaterservices.com, is completely new and vastly improved. Information on deionized water system deliveries can be found there.
    General Water Services is the leading provider of deionized water service in the Mid-Atlantic region
    About General Water Services:
    Located in suburban Philadelphia, General Water Services offers portable service DI water systems. General Water Services regenerates and delivers large and small deionized (DI) water systems. The flow rate through an individual bank of tanks ranges from 1 to 150 gpm and depending upon your flow requirement, single or multiple banks are used.
    Typical deionized water systems provided by General Water Services
    General Water supplies portable service DI water systems for high purity and ultra high purity water applications for virtually any process industry including, but not limited to, chemical, power, beverage, food, electronics, pharmaceutical, medical, medical device, hospitals, laboratory, glass manufacturing, and assembly industries where deionized water is critical to production available for long-term contractual service and also for short term or emergency needs.

    Standard Deionized Water Service Area
    General Water Services' standard service area runs north to south from New York City to Washington DC and east to west from coastal New Jersey to Harrisburg, PA
    For Further Information:
    Visit the General Water Services website
    General Water Services brochure.
    General Water Services product bulletin.

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    Tuesday, September 25, 2007

    Ion Exchange System - Two Bed Deionizer (DI) System - Shipped

    This two bed ion exchange DI system was shipped from Res-Kem this past week.

    Res-Kem Skid-Mounted Two Bed DI System for Process Water Treatment

    The DI system consists of two identical skid-mounted ion exchange units each with a cation vessel followed by an anion vessel. The DI system was designed to treat a continuous flow rate of 90 gpm of multi-media filtered water for process water and boiler feedwater requirements. The ion exchange units incorporate air actuated GE Aquamatic valves. For simplicity and to improve reliability, all flow, conductivity, and chemical concentration parameters are monitored by a single Thornton 770 MAX Multiparameter controller.

    These two bed ion exchange DI systems will be incorporated into the customer's plant automation. Given the level of automation, the customer's critical requirement was to have the ability to verify position of the Aquamatic valves remotely. Plant operators needed confirmation that when they sent a signal for a valve to actuate this actually occurred. Unfortunately, Aquamatic valves do not have the option of remote feedback. Working with a valve integrator, we were able to meet this requirement.