Tag Archives: potable water

Using Tekleen Filters for Seawater Filtration on Cruise Ships

1. Using Filtered Water for Ballast Water Exchange

Filtered sea water from a ship’s ballast can be released back into the sea, eliminating the potential of unloading non-native and often invasive plants and animals where they don’t belong. Many cruise lines are using on-board filtration to clean their bilge water during the ballast water exchange. By using Tekleen self-cleaning automatic filters, ballast water can be cleaned of debris and solids, thereby preventing animals, vegetation, and floating debris from exiting. Debris can then be collected and disposed of properly.

2. Pre-Filtering for Potable Water Processing from Sea Water, and Keeping Pipes Clean for Maintenance Minimization

When used for other purposes to filter water on board, an automatic self-cleaning Tekleen filter can support cooling systems, can pre-filter water for further cleaning and desalination, and can support the operational reliability of piping, spray heads and any devices that water flows through, by keeping them clean of deposits. Tekleen filters can be used to filter outgoing washwater from laundry, galleys, mess halls, swimming pools and spas, and bathing. It can be used as a pre-filter down to 2 microns, protecting R/O and microfiltration systems that might be used on board for potable water production from sea water.

Using a Tekleen filter increases the potential use of filteredtekleen filter wastewater as re-used water or make-up water throughout a processing operation.

Without a proper filtration system, the debris in source water can cause fouling of pipes and heat exchanging surfaces, which lowers the thermal efficiency of the system. Fouling also increases the friction losses and induces erosion, corrosion, and energy waste by increasing the demand for a higher flow rate. Other problems include the plugging of spray nozzles, blinding of sensors, analyzers, as well as the wearing down of pump gland seals, scrubbers, misters, membranes, and ion exchanger columns. These issues can cause unscheduled shutdowns for maintenance and cleaning and the loss of many man-hours. Filtration is one of the simplest and most convenient ways of solving these problems.

By using Tekleen self-cleaning filters, the solid debris can be captured, removed from the water flow, and disposed of properly before the filtered water reaches its destination. TEKLEEN® self-cleaning water filters provide the ultimate solution where dirty water is a problem. The filters operate on line pressure alone. The self-cleaning process is triggered by a pressure differential that occurs when water is too highly saturated with solids, and is accomplished in seconds without interrupting the main flow.

The filters are compact in size and designed to meet a variety of industrial applications.

The use of Tekleen self-cleaning filtration is also a great benefit to other uses of sea water, sea-based platforms used in extraction and processing, and water reinjection in general. For a description of these benefits, please see the Tekleen application sheet on platforms, oil production and reinjection wells in the OIL PRODUCTION section of our website.


For more information, visit Tekleen’s article via their website or chat with an experienced Gallagher Fluid Seals Engineer.

Resources: 

  1. http://www.tercenter.org/pages/bilgewater.cfm
  2. https://oceanconservancy.org/blog/2017/03/02/3-easyways-to-stop-invasive-species/
  3. http://www.stapgef.org/sites/default/files/stap/wp-content/uploads/2015/06/Durr.pdf
  4. MARPOL regulations- https://www.researchgate.net/
    publication/277708775_Complying_with_MARPOL_7378

Water Regulations and NSF 61 Compliant Elastomers

Replacing Aging Water Infrastructure With NSF Compliant Materials

There are over 155,000 public water systems in the United States and more than 286 million Americans who rely on community water systems daily.  Since most of the infrastructure was built between the early 1900’s and 1960 using outdated technology/products and capabilities, nearly everything is approaching the natural end of it’s lifespan.

Some estimates put the repairs and replacement of thePicture of NSF Compliant Gaskets infrastructure between $250B and $500B over the next 20-30 years. Several applications will need to be updated or fully replaced for the safety of consumers and quality of delivery, including:

  • Joining and sealing materials
  • Mechanical devices
  • Pipes or related products
  • Process media
  • Plumbing devices
  • Non-metallic potable water materials
  • Hydrants
  • and Public drinking water distribution (tanks and reservoirs, maters, individual components)

Joining and Sealing Materials

When these systems were being constructed and assembled decades ago, there were limited regulations and requirements that needed to be met. Gaskets, at least the traditional ones, were often made in two different ways: (1) Red Rubber (ASTM D1330 Grade 1 &2) with compressed non-asbestos or (2) cloth-inserted rubber with compressed asbestos.

However, today’s acceptable gasket requirements for the potable water industry differ greatly from those in the past. Gaskets have strict guidelines to abide by and must be:

  • Chemically resistant
  • NSF compliant
  • Food grade compliant
  • Electrically isolating

Because of the need for health and safety, the National Sanitation Foundation (NSF) was created in order to establish minimum requirements for the control of potential adverse human health effects from products that contact drinking water. In addition to gaskets, the NSF covers a variety of products and parts relevant to the water industry, including: pipes, hoses, fittings, cements, coatings, gaskets, adhesives, lubricants, media, water meters, valves, filters, faucets, fountains, and more.

So you might ask – why does the NSF require different materials and regulations for gaskets compared to years ago?

First things first – leaks are a major issue with the aging infrastructure. Improperly placed gaskets & seals or faulty products can cause leaks. This in turn could pose health risks to people drinking potable water or using products processed with potable water.

Additionally, the treatment process and chemicals utilized are Picture of NSF 61 Compliant Sealsdifferent from previous “standard” products. For example, research and testing over many years has concluded that traditional gaskets, which were used many years ago, could pose a safety threat to those drinking water processed with specific materials. This led to updated regulations for NSF 61’s drinking water system components.

Lastly, engineered sealing solutions are more important than ever. There’s a wide variety of custom engineered water systems throughout the U.S. – climate, geographic terrain, and the needs of the community are all reasons for why water infrastructure is so unique. Because of this, custom gaskets, seals, and other products are needed to supplement those systems.

Luckily there are many companies dedicated to providing the highest quality NSF 61 products. These trusted brands have proven materials to count-on when replacing or repairing water infrastructure:

Garlock’s NSF 61 Family of products

Parker’s NSF compliant products

Freudenberg’s new generation of NSF products

For more information on how Gallagher Fluid Seals’s engineers can help you with a custom solution, call us at 800.822.4063