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Posted by Fluid Gas Handling Team on 11 Dec 2018
Medical-care settings are often stressful, making it hard to rest or sleep—both of which are important for healing and recovery. And, as the portability of medical technology continues to rapidly evolve, an increasing number of medical devices and instruments can be utilized in the patient’s home—for example, point-of-care diagnostics, dialysis, and portable oxygen concentrators.
For the best possible experience, medical equipment should be as non-intrusive as possible.
A frequent complaint by patients and other end users is the disruptive noise that medical equipment can generate. Compression therapy equipment, for example, which is used to prevent clotting in a patient’s legs and feet during hospital stays and surgery, utilizes pumps that cycle on and off over long stretches of time. This can interfere with rest and sleep. The volume of the pump may also be too loud, creating a disruptive environment. Therefore, it is essential to minimize the operational sounds of medical devices to optimize the end-user experience.
For comprehensive information on the impact of noise generating equipment on patients and sound mitigation solutions, download the full white paper, "Advancements in Noise Reduction Techniques for Medical Equipment Manufacturers".
In pump engineering, there are two main sources of sound generation:
Common components in medical equipment that often generate noise are:
Diaphragm pumps tend to be the most substantial source of noise. Their motors rotate a crank that moves a connecting rod up and down, flexing the diaphragm. This action builds pressure or vacuum and generates flow. As the pump operates, it emits vibration across the body of the device.
Solenoid valve and fan noise accompany sound generated by diaphragm pumps during operation. This is caused by the normal actuation of solenoid valves and rotation of the fans as they oscillate the air to keep the equipment cool.
Since pumps often cycle, their noise levels can be intermittent. This breaks the normal sound conditions in a room, making it difficult to sleep or relax.
OEMs often report that noise generated by their equipment is the number-one end-user complaint. However, only a few component manufacturers make sound reduction a top priority in their product enhancement activities. Although mufflers can sometimes be added to equipment, this increases the overall dimensions of the device and can cause an increase in back pressure.
Noise reduction is a key component of Parker’s new product-development projects, especially sound mitigation techniques for diaphragm pumps. We recently tested several methods of sound reduction, including:
Results are shown below:
Oversizing the pump and running it slower
Adding a muffler
Plastic mounting plates
Adding a pump enclosure
For structure-born noise, plastic mounting plates that incorporate elastomeric feet reduced the vibration transmission from the pump to the medical device, resulting in a 3-dB noise reduction for an average Parker diaphragm pump. Adding a customized pump enclosure achieved up to 9 dB in sound reduction.
Pneumatic noise was reduced by oversizing the pump and adding a muffler. Oversizing the pneumatic performance of the diaphragm pump and running it at a slower speed reduced the number of pulsatile flow peaks and, in certain applications, achieved a 3-dB sound reduction. Installing an expansion chamber resulted in a 4-dB sound reduction.
A 6 to 9dB noise reduction can be achieved by combining some of these techniques. These are relatively simple and inexpensive solutions that can be easily built into medical devices and diagnostic equipment, creating a much more desirable environment for the end user.
Enhancing user comfort through medical technology advancements represents the core value proposition for OEMs. Incorporating effective noise reduction solutions into medical device design is essential for a positive patient experience and long-term use of the equipment.
To find out more about sound reduction techniques for medical equipment and what Parker Hannifin has to offer for accessories and application engineering solutions, please contact Parker Precision Fluidics at email@example.com.
This blog was contributed by Richard Whipple, marketing communications manager, Parker Precision Fluidics
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Projects related to the construction or buildings life cycle are increasingly complex and fast. The number of trades involved in the life of an industrial building is always larger and more specific. BIM, as a shared project management process represents an effective and innovative response.
What is BIM?
BIM comes from the English Building Information Modelling. The term building here is generic but also includes infrastructure.
BIM is primarily working methods and a 3D parametric digital model that contains intelligent and structured data.
It guarantees the sharing of reliable information throughout the life of a building, from its design to its demolition. The digital model is a digital representation of the physical and functional characteristics of this building.
BIM is a collaborative e-platform on a construction project, bringing together all the trades of this project, according to a common language.
BIM: A new service offered by Transair
The construction projects involve a strong collaboration between the different actors of a project, to better control each phase of the life cycle of a building.
As the leading manufacturer of modular industrial fluid networks; Transair® has identified the interest of integrating the BIM platform increasing used in the building sector.
"With BIM, the way construction professionals work is hanging, with multiple gains for the entire industry," said Nicolas Maupillé, project manager and DSO Manager at Transair®.
Always listening to the market, Transair® sees BIM as a performance accelerator in project management of its users and partners. Transair® has partnered with a specialist, BIM & Co. for the modeling, integration and publication of its global offering of modular networks for industrial fluids (BSP ISO and NPT ANSI).
BIM simplifies the design process in general, in particular by optimally integrating Transair® networks.
It, therefore, allows users and integrators of the Transair® system:
- To foster better collaboration between the various stakeholders of the same project
- To have accurate visualizations at all stages
- To reduce the risk of errors throughout the project
Transair® launches its library of BIM-enabled objects
All BIM & CO tools dedicated to Transair® make it easy to structure and distribute product data as BIM Ready objects to all users of the platform. The objects are thus adapted to all stages of the process, from design to construction, operation and maintenance.
To be BIM compatible, all the product families of the Transair® system are available in REVIT format, in LOD (Level Of Detail) 200 and 400. All the specific features of the Transair® product range are automated in a 100% template. dedicated.
To benefit from this new service, it is enough:
- To register on the BIM & CO platform,
- To access the Transair space
- Then download the template and the objects necessary for the construction of the desired network free of charge.
"Transair® wishes to integrate fully into the spirit of BIM by providing the various players with a quality service, which will allow them to understand the design. of their networks in an intuitive way and thus to stay focused on their projects, so it was important for us to propose to the design offices, objects, whose data are properly structured and informed"
Guillaume Tétard, business unit manager, Transair.®
For further information on Parker's BIM solutions contact us.
Article contributed by Nicolas Maupillé, DSO manager Transair® and Laurent Orcibal, ebusiness manager, Low Pressure Connector Europe, Parker Hannifin Corporation.
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Quick couplings allow fluid lines to be quickly and easily connected and disconnected without the need for tools. Non-spill or dry break couplings are a specific type of connector designed to eliminate spillage during a connection and disconnection.
What sets non-spill apart from traditional couplings? The flush face valve is the difference maker as this feature minimizes discharge and trapped air, while ensuring repeated dripless connections and disconnections. Non-spill or dry break quick disconnects are key to maintaining a clean environment, protecting system fluids from contamination caused by air or debris, and most importantly, keeping workers safe.
Did you know 98 million gallons of fluid from hydraulic equipment is improperly deposited into topsoil, groundwater, rivers and lakes annually? That’s according to the National Oceanic and Atmospheric Administration (NOAA). The statistics are staggering when you come to the realization that one liter of oil can pollute up to one million liters of water.
Fluid leaks and spills have the potential to cause significant environmental issues. If contamination were to occur, organizations would be responsible for damage to ecosystems and wildlife, resulting in high cleanup costs and federal penalties. All industries from agricultural food production to manufacturing and service operations are affected by environmental protection regulations.
Even what looks like a small leakage can sometimes leave lasting effects on our precious planet. Non-spill quick disconnects keep fluids contained and its environmental impact to a minimum. The flush face valve quickly shuts off flow when fluid lines are disconnected and is engineered to eliminate spillage and fluid loss.
Hydraulic equipment relies on fluid system integrity to effectively transmit power for instant, accurate response and reliable performance. Contamination and the loss of performance transpire when debris and air work their way into the hydraulic fluid. It’s common for this to occur when dirt accumulates on the exposed surface of a traditional poppet valve tip when disconnected. Then, when the quick coupling is reconnected, air and contamination are pushed into the system fluid as the poppet valves open. The air and contamination can cause a loss of horsepower, temperate performance abnormalities and a variety of detrimental effects.
The flush face valves of non-spill quick couplings do not provide surfaces or areas for dirt to accumulate and collect. In environments where dirt is present, the smooth flat surface of the coupling end can be easily and quickly wiped clean. Additionally, non-spill valves keep air inclusion to a minimum because the flat-faced surface does not trap pockets of air as fluid lines are reconnected.
There are many safety and ergonomic risks associated with hydraulic system leakage. Exposure to dangerous chemicals and confined spaces significantly enhance the chances of injury during maintenance operations. Slips, trips and falls account for a third of all personal injuries and is a top cause of workers’ compensation claims.
The most common reason why? Wet or oil surfaces as a result of incremental leakage. Spills and leaks can happen at any point and pose a wide range of health hazards to workers such as sensitization and irritation as well as physical risks.
Parker offers a variety of non-spill couplers to fit versatile fluid applications. The FEM Series and 71 Series are both ideal for use in applications where air inclusion and fluid loss must be minimal. When chemical compatibility is also needed, Parker’s FS Series is a good option.
Parker’s FEM Series is compliant with the highest design and performance specifications set forth by ISO 16028. The standard defines a common dimensional and performance profile that ensures global compatibility and interchangeable connectability with other manufacturer’s quick couplings built to the same standard. Parker’s FEC Series nipples also provide the ability to connect under trapped residual system pressure. FEM Series quick couplings are constructed from steel material and are commonly used to connect hydraulic lines to tools used in construction and utility work. In addition, they are widely used on skid loaders and other similar machinery.
The 71 Series, an original Snap-tite design non-spill coupling, is rated for working pressures up to 10,000 psi. With material options featuring steel, 316 stainless and high pressure stainless steel, Parker’s 71 Series non-spill quick couplings are utilized in industrial applications as well as topside offshore oil drilling and construction.
FS Series non-spill quick couplings provide excellent chemical compatibility. The all stainless steel construction and Fluorocarbon seals make them ideal for closed system transfer of chemicals or corrosive media. Other applications include food processing and chemical dispensing.
The FEM Series | 71 Series | FS Series couplings are available for purchase on Parker.com. Simply add products to your cart for shipment within two days for in-stock items.
Article contributed by Anthony Mistretta, product sales manager, Quick Coupling Division, Parker Hannifin Corporation.
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Plentiful in North America and relatively inexpensive, natural gas produces 30 percent fewer greenhouse gas emissions than gasoline or diesel, making it an ideal alternative fuel for a diverse range of applications. Heavy-duty vehicles, such as refuse trucks, Class 7-8 trucks and buses are the largest users of this fuel source. Given this growing change, the need for reliable leak-free connections is even more important which is why Parker developed a CNG version of its Seal-Lok O-ring Face Seal (ORFS) fittings.
Known for proven leak-free connections, Seal-Lok ORFS fittings have many benefits for these CNG applications. The ORFS design provides unlimited reusability, resistance to vibration, zero clearance for easy assembly and replacement, as well as resistance to overtorque which has been known to be an issue for other fittings designs. Though ORFS fittings have traditionally been used in industrial hydraulic applications due to the elastomeric seals, the creation of a special CNG O-ring has now made this reliable connection a viable option in alternative fuel applications.
Since the available amount of energy per liter of natural gas is low compared to the traditional fuels, it is compressed to a pressure of at least 200 bar (2900 PSI). Therefore, special attention must be paid to the safety aspects related to CNG Cylinders on-board Natural Gas Vehicles (NGVs). One potential hazard seen in garbage truck operation is a load fire. Load fires are the most common type of truck fire in the refuse/recycling industry.
As you know, refuse vehicles travel in populated residential areas every day. It is critical to ensure the safety of not only the drivers, but anyone in the proximity of a NGV. The trucks are engineered to be extremely safe; however, load fires can heat the CNG storage tanks, raise pressure and introduce the risk of a rupture occurring. To reduce the risk of a rupture in the event of a fire, the CNG cylinders must be equipped with a Pressure Relief Device (PRD). The effectiveness of this specified fire protection system must be validated in a bonfire test.
Bonfire test requirements for Cylinders and PRDs are defined in Regulation 110, ANSI/CSA NGV 2, and CSA B51 Part 2, however, there are no specific bonfire test requirements for the fittings and seals connecting CNG tanks to the system. Given the growing use of Seal-Lok O-ring Face Seal CNG fittings in these connections, Parker felt it important to develop bonfire testing to validate they would perform if exposed to fire.
The criteria for passing were defined using the most rigorous requirements placed on CNG tanks in ANSI/CSA NGV 2 and CSA B51: samples pressurized to 3,600 psig and exposed to a minimum of 590 °C for 20 minutes. To qualify as passing the bonfire test, all seals must have maintained pressure for at least 20 minutes after being heated. This bonfire test was performed by the outside testing facility of Southwest Research Institute’s (SwRI) Fire Technology Department.
Seal-Lok for CNG passed the bonfire test. Passing the bonfire test confirms that Seal-Lok for CNG meets the industry safety requirements for CNG components used in natural gas vehicles. Seal-Lok ORFS CNG fittings are the first and only fittings in the industry to be Bonfire Tested. In addition to passing the bonfire testing, these fittings are also tested and certified by TUV according to the following standards: ECE R110, ANSI NGV 3.1-2014/CSA 12.3-2014 for stainless steel and zinc nickel fittings, and ISO 15500.
To learn more about the Seal-Lok for CNG Bonfire Testing, download the test summary.
Find out more about this product line and see the available configurations on the Seal-Lok for CNG product series page. If you have any questions about this article, please post them and we will respond. To talk to Parker regarding the benefits of Seal-Lok for CNG for your application, please call 614-279-7070.
Written by John Holzheimer, applications engineer, Parker Tube Fittings Division
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