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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.
Download our whitepaper with two case studies on potable water systems and choosing the right connectors, tubing and accessories.
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.
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:
Following acceptance of a comprehensive proposal to restore high-quality drinking water to the dental office, the water treatment company’s corrective actions included:
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.
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.
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.
Submitted by Traci Simmons, marketing services specialist at Fluid System Connectors Division, Parker Hannifin.
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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.
Fig 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:
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.
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.
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).
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.
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.
Gary Wain is Product Manager, Parker Hannifin Manufacturing Ltd, Bretby Gammatech, Instrumentation Products Division, Europe
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Innovations in the design of primary isolation valves and manifolds for mounting pressure instrumentation can deliver enormous pressure control advantages to both instrument and piping engineers, ranging from significantly enhanced measurement accuracy, to simpler installation and reduced maintenance. Parker Hannifin has created a comprehensive range of instrument manifold mounting solutions for the main types of pressure instrumentation, employing close-coupling techniques which eliminate impulse lines and tube fittings to improve overall instrument performance and reliability.
There is no formal definition for close-coupling, but it has come to mean any instrument mounting system that enables a user to connect an instrument directly on to the process line, and primary flow control isolation valve. The overriding objective of this is to optimise the accuracy of measurement, by eliminating the long runs of tubing, tube fittings and bends and joints between process pipe and instrument that can cause pressure drops, and gauge/ impulse line errors.
Transmitter ‘hook-ups’ are often configured individually for each application, and can be large, heavy and difficult to install. By replacing such arrangements with purpose-designed close-coupled manifold/mounting solutions, users are able to optimise accuracy and reap a whole range of additional benefits such as...
‘Hook-ups’ for pressure transmitters often involve the custom configuration of complex arrangements of tubing, with multiple connections and valves. Measurement errors can be introduced as a result of long length impulse lines. These errors are frequently compounded by the use of different tube, fitting and valve components whose diameters may vary throughout an instrument installation.
Inaccuracies can distort the pressure impulse signal, causing errors of up to 15% (on flow measurements).
This traditional solution uses two sets of valve assemblies to create the double block and bleed valves, which are connected with impulse lines and connectors to the instrument manifold. It involves numerous discrete components, with all the associated costs and assembly time, and introduces bends that cause attenuation and turbulence that can affect measurement accuracy. If not carefully specified, other measurement accuracy problems can arise from differences in bore diameters of the various components, and unequal lengths of tubing.
View the Parker Close-Coupled Instrument Mounting System here.
Jim Breeze is Product Manager, Instrumentation Connections and Process Valves, Parker Hannifin, Instrumentation Products Division, Europe.
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Selecting a low-pressure hose often means the choice between rubber or thermoplastic. Both offer distinct advantages however, choosing a hybrid hose can maximize all the benefits in one unit.
Low pressure hoses are used on a wide variety of machines and industrial equipment to supply different types of fluids (e.g. air, water, oil, vacuum, etc.). Hoses are typically featured in different colors to help users identify individual fluid media inside equipment more easily. Other important factors in selection include fast and easy installation of these hoses.
Push-on/push lok hoses are very easy to assemble. Just push in the nipple into the hose and the connection is ready.
Rubber low-pressure hoses
Rubber hoses require a low nipple insertion force, enabling the user to perform the hose assemblies on-site on the machines, saving time and cost.
This type of hose is also highly flexible. The rubber compound makes the hose very ductile, decreasing the necessary force to bend it. This feature is very important in applications such as handling robots, where the hose flexibility is stressed at the maximum.
Finally, rubber hoses can support high temperatures. The strong grip between the hose inner layer and the hose nipple contour is guaranteed for environmental temperatures ranging from -40°C to 100°C.
Thermoplastic low-pressure hoses
Thermoplastic hoses require a higher nipple insertion force and are less flexible when compared to rubber hoses but they provide a high level of ozone resistance. This enables the long-term use of these hoses under harsh, outdoor environmental conditions (e.g. telehandlers, forklift trucks) as well as inside applications in high ozone areas.
The polyurethane material that is used also permits the offering of brightly colored hoses with a smooth surface.
Hybrid low-pressure hoses
Hybrid hoses, that combine a synthetic rubber inner-tube layer and a polyurethane cover layer, have been engineered to include all the advantages of the two materials in one unit. Their nipple insertion force and flexibility are equal to rubber hoses while their ozone resistance is equal to thermoplastic hoses, but it is on the abrasion and torsion resistance side that the hybrid hoses have no rivals.
The extreme resistance of these hoses to wear and tear makes them the ideal choice for use in very tough applications, such as energy chain systems within machine tool or injection molding machines and handling robots.
Exceptional torsion resistance, with more than one million test cycles on a pressure/torsion test bench, ensures a long-life time when used in multiple movement applications (e.g. welding robots within car production).
These hybrid hoses are also resistant to extremes of temperature, offer a smooth surface and are manufactured in a range of bright colors.
Advantages like these have proven the Parker Hybrid Push-lok Hose 837-PU to be a preferred solution in a wide range of markets. Global leading car manufacturers are among the users that have specified this hose type for use in their car production lines.
To discover more about Parker’s Push-Lok 837PU hybrid and other low pressure hoses visit our website, or contact us to discuss your application needs.
This blog was contributed to by Stephan Völler, Product Support Manager and Conny Stöhr, Marketing Services Manager, Hose Products Division Europe.
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When combined, they ask the following question: How can we improve our customer experience whilst increasing capacity on the network and at the same time reducing both our carbon footprint and the cost of running the railway?
There are obviously many things that can affect component weight. Size, shape and material are all key, but production method can also be vital in producing the optimum form.
Just consider the ability of additive manufacturing to produce components without traditional problems, such as shape and form restraints, or material waste produced by machining. The resulting components can be complex forms that maximise material thickness; this gives us engineered solutions that are both mechanically sound yet of lighter weight, and all in a shape or form to fit and integrate into the interfaces.
Reducing equipment weight alone may not affect the space envelope required; however, some gains can usually be made. It is worth weighing up the cost of aiming for using less space against the cost of developing the equipment to fit.
Learn more about Parker solutions for rail at this transportation website, or contact our dedicated transportation team to discuss your particular rail application performance, cost, weight and space requirements.
Article contributed by Dave Walker, market development manager for Rail, Motion Systems Group, Parker Hannifin Corporation.
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