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Potable Water Case Study for Choosing the Right Connectors - image of waves - Parker Hannifin Fluid Systems Connectors Division Potable water systems, whether in water filtration, beverage dispensing, life science, bottling or semiconductor are much more than the sum of their individual parts. A thorough analysis of the environment in which the system will be operating -- in addition to the selection of system materials, connectors, tubing and accessories – is needed to ensure trouble-free, long-term system performance.

The following is a case study of an existing potable water system in a dental office that broke down due to poor planning and component selection and the steps taken to rectify the problems.

 

 

Dental Office Potable Water Case Study for Choosing the Right Connectors

 

Download our whitepaper with two case studies on potable water systems and choosing the right connectors, tubing and accessories. 

 

          The dental office

Potable Water Case Study for Choosing the Right Connecors - dentist office installation - Parker Hannifin The service director of a water treatment company received a frantic call from a dental office receptionist explaining that the potable water throughout the office had an unpleasant taste and was releasing a foul odor. The central Reverse Osmosis (RO) system was producing unusable water at the office’s water cooler in the patient lounge, the spigot in the employee break room and in the dental operatories where dental treatments are performed. Further, it was noted that there was a pungent odor emanating from the sink every time the tap water was turned on in the break room, while all the tubing supplying the service locations was turning green.

  Diagnostic survey and audit

A diagnostic survey of the entire water system, plus a site audit of the existing installation and plumbing service to the building, revealed many issues, including:

  • The static water pressure to the building measured 112 psi with no pressure regulator on the incoming service main.
  • A leaky self-tapping valve was in use for the under-sink RO unit installed in a way that was a plumbing code violation.
  • The RO drain saddle was mounted downstream of the trap - another code violation.
  • Cleaning chemicals and a box of dishwashing compound under the sink were causing corrosion and oxidation to the plumbing.
  • Purveyance tubing from the RO system was secured to the wall with small clips and the horizontal runs were drooping. The tubing was routed above the drop ceiling in several locations causing the tubing to be exposed to light and radiant heat from the lighting fixtures and nearby HVAC ductwork.

Following acceptance of a comprehensive proposal to restore high-quality drinking water to the dental office, the water treatment company’s corrective actions included:

  • Removal of the condemned existing residential RO and related purveyance tubing
  • Repairing the plumbing and sanitary piping under the break room sink
  • Cleaning, sanitizing, performance testing and recommissioning of the patient lounge water cooler
  • Installation of a code-approved pressure regulator at the main water line set to 60 psi with pressure gauge
  • Installation of a light-commercial RO system with a cellulose tri-acetate (CTA) membrane and six-gallon accumulator in the utility closet
  • Installation of 0.375-inch ID CPVC rigid piping using mounting and installation best practices
  • Installation of service valves at each service outlet for isolation, removal and replacement of chlorine
  • Addition of taste and odor (CTO) POU filters
  • Installation of non-translucent, FDA-approved flexible antimicrobial polyethylene tubing connections at each service valve, POU CTO filter and connections off the water cooler, remote RO spigot on break room sink and dental operatories with compatible thermoplastic fittings
  • Performance of pressure-test and purge purveyance piping, valves and tubing of air and fill with supplemented chlorinated RO water for disinfection; flush cooler, remote RO spigot and dental operatories
  • Attached CTO POU filters and purge of air
  • Connection of final filtered water to cooler, remote RO spigot and dental operatories
  • Testing of product water for chlorine removal
  Follow-up

Subsequent to the plumbing inspector’s sign off, the service director took the customer on an inspection tour to appraise the taste and quality of the water and confirm her satisfaction. The customer approved the new installation and accepted a recommended service schedule for the new potable water system.

 

Dental Office Potable Water Case Study for Choosing the right Connectors. - Download White Paper - Parker Hannifin

Download our White Paper covering two case studies on potable water systems. Learn the importance of project planning, component selection, and understanding environmental conditions in potable water systems.

 

Visit Parker’s water solutions website for all available system solutions for public, life sciences.

 

Gary Battenburg, Technical Support and Systems Design Specialist with the Fluid System Connectors Division of Parker Hannifin Corporation Author, Gary Battenberg is a technical support and systems design specialist with the Fluid System Connectors Division of Parker Hannifin. He has 35 years of experience in the fields of domestic, commercial, industrial, high-purity and sterile water treatment processes. Battenberg has worked in the areas of sales, service, design, and manufacturing of water treatment systems and processes utilizing filtration, ion exchange, UV sterilization, reverse osmosis and ozone technologies. 


 

Traci Simmons, Marketing Services Specialist at Fluid System Connectors Division, Parker Hannifin.Submitted by Traci Simmons, marketing services specialist at Fluid System Connectors Division, Parker Hannifin.

 

 

 

 

Related articles on this topic:

Choosing the Right Connector, Tubing and Accessories for Your Application - Part 1

Desalination System Provides Ultra-Pure Water for Offshore Oil and Gas Rigs

 

Dental Office Potable Water Case Study - Choosing the Right Connectors

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Making Ash Analysis Simpler in the Field - White Paper, Parker Hannifin, Instrumentation Products Division Europe, Coal conveyor Traditional coal ash sampling and analysis using a laboratory facility can take a few hours if there is an on site lab or days if the samples are sent away for analysis. Using the Parker Bretby Gammatech portable Ash Probe, the results are available in a few minutes by probing the coal pile with no special training required by the operator. All the data is collected during the shift and can be downloaded onto a memory stick or direct USB cable to a PC in CSV format for analysis and reporting. The unit comes with the Parker Bretby Gammatech utility software for ease of download. This white paper describes the journey the Parker team made in producing the new AshGraffix controller for the Ash Probe.

Download white paper as pdf.

During the latter part of 2012, we were advised by our supplier that the micro processor used in the Ash Probe system was being made obsolete; this gave us two choices:

1. Incorporate the new processor and modify the software for the existing display unit.
2. Develop a new design display unit based on our customers feedback using the latest processor.

Old display unit - new software code 

Making Ash Analysis Simpler in the Field - White Paper, Parker Hannifin, Instrumentation Products Division Europe, AshGraffix display unitFig 1. Old QWERTY keyboard display unit with LCD display in English only.

To support sales of the Ash Probe while we developed the completely new unit, we chose to write the new software code for the existing display unit as the old processors were getting harder to obtain; this was essential so we did not leave customers waiting for the upgraded version of the display unit and gave us the opportunity to upgrade older units coming back for repair.

Our customers gave us some important clues as to what features they would find useful in a new unit:

  • A smaller, lighter more ergonomic unit for daily use in the stockpile areas and trains
  • Increased number of calibrations that can be stored
  • Multi language support
  • Must be IP65 rated
  • Colour touch screen
  • Improved download capability from RS232 and Hyperterminal utility
  • Easy to navigate through menu options
  • Customised settings through password protection levels
New software and new display unit

During 2014 we set out to design the new product and software called AshGraffix with the customer needs in mind. The project time frame was 12 months from concept so we would be able to demonstrate the first unit at mining shows in 2015. The design for hardware, electronics and software was all done in house by the Parker team. Support from our local suppliers was critical as we went through several iterations of the printed circuit board design as this was the first time we had used surface mount components and touch screens. Finding low power components was key to the end result as the unit needed to work a full shift in some very harsh conditions from the heat and humidity of India and Vietnam to the low temperatures and dry conditions in Mongolia and Siberia.

Component list

Neil Jenkinson, our mechanical Engineer, selected an aluminium extrusion for the outer case that was rugged and could hold the printed circuit board and touchscreen. He found a superb membrane protector product that would sit on top of the touchscreen preventing scratching and potential failure if sharp items hit the screen by accident or in duality use, e.g a pen tip to tap the screen. The industrial cable connectors were retained as they had given good service over 20 years and readily available for after market sales. Different types of of battery packs were tested for durability and full function duration with industry standard Metal Halide rechargeable cells coupled with an intelligent charger selected as the best all round option for the AshGraffix.

As Human Machine Interfaces (HMI) have become more prevalent in the industrial world and availability for colour touchscreens has increased, we had a good choice of suppliers knocking on our door to show us their ranges. In the end a choice was made and the quality has remained high during the last two years of sales.

Circuit board Making Ash Analysis Simpler in the Field - White Paper, Parker Hannifin, Instrumentation Products Division Europe, New AshGraffix circuit board

The multi-layered printed circuit board was the most difficult item to develop as we wanted all the electronic components and connections to the outside world on a single board only slightly larger than the touchscreen. This task did not phase Chris Knight, our electronics engineer, who put in many hours working on the pcb design software to get the SMT components and tracks right on the multi layered design before it went out to prototype manufacture. The end result was a triumph for the design team.

Fig 2. New AshGraffix multi-layered single printed circuit board with new processor and using many surface mount components (SMT).

Coding

The next task that faced Kevin Corcoran, our intrepid software engineer, was to incorporate all our ideas into code. After many discussions and updates during 2014 (usually accompanied with tea and some form of cake - this was before the Great British Bake Off was aired to the nation, as we found this was the best way to inspire creativity), we designed the home screen, menus and navigation through the system with the question to the operator:

What do you want to do today?

The concept was to give the operator access to commence ash sampling with two taps from power up screen and standard icons used for configuration and saving files to the unit itself or to USB output.

Making Ash Analysis Simpler in the Field - White Paper, Parker Hannifin, Instrumentation Products Division Europe, Bretby Gammatech Ash ProbeWith additional processing power, came new features:
  • Ability to store up to 100 calibrations (from 9 in the old system)
  • Graphically represent the days ash analysis on screen
  • Multi language support which is so important for our overseas customers
  • USB connection for transferring data
  • Supports transfer of data across multiple versions (Windows XP/7/8/8.1 compatible).

Fig 3. Ash Probe and AshGraffix complete system.

During the first half of 2015 we were happy with the final design; software bugs had been eliminated and some test users had put the unit through its paces; only then did we go to the mining shows and offer the unit to the market.

In conclusion, the key take aways for updating the display unit were:
  • Do it for the right reasons, not just because technology allows it
  • Listen to the customer and put the key features into the product
  • Be open to new ideas and allow staff to be creative
  • Make something as a team you can be proud of and can sell!

 

 

Making Ash Analysis Simpler in the Field - White Paper, Parker Hannifin, Instrumentation Products Division Europe, Gary Wain, Product Manager, Bretby GammatechGary Wain is Product Manager, Parker Hannifin Manufacturing Ltd, Bretby Gammatech, Instrumentation Products Division, Europe

 

 

 

 

 

 

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Ash Probe and AshGraffix Installation Guide and Product Overview

Making Ash Analysis Simpler in the Field | White Paper

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