Top Posts Tagged with #lifecyclecosts

New canned motor pumps for demanding applications

The new hermetically sealed canned motor pumps of the EtaSeco type series © KSB SE & Co. KGaA With its EtaSeco type series KSB is presenting a new generation of hermetically sealed canned motor pumps that unite – acc. to a company’s information: “the highest reliability with a long service life. The pump sets have been specially developed for exacting applications in which a fail-safe, low-noise and completely leak-free operation is crucial. Examples are cooling circuits in transport engineering, environmental and industrial applications as well as data centres. Another application is the cooling of power modules for modern wind power plants and rail vehicles. The pumps are characterised by their completely encapsulated design. Doing away with the need for a shaft seal lowers the risk of unscheduled downtime significantly”. Their service life of more than 30 years and their extremely long service intervals markedly reduce the pumps’ life cycle costs. High-quality robust materials provide long-term operating reliability, even in demanding environments. Depending on the design, corrosion-resistant materials such as stainless steel or nodular cast iron with cathodic electrocoating are used. The pumps feature corrosion protection up to category C5 in accordance with EN ISO 12944. Compact in design, the new EtaSeco pump sets are easy to install in both horizontal and vertical positions, which makes them ideal for confined spaces. Eight available motor sizes, different power supplies and three connection types offer maximum flexibility for a wide range of system requirements. This is added to by a multitude of connection options such as a terminal box, bulkhead housing or pre-configured cables that allow for a fast integration. A total of 24 hydraulic system sizes covers a broad performance range. Mating dimensions to EN 733 and flange designs to DIN, SAE or ASME enable seamless integration in existing systems. The combination of an efficient hydraulic system, KSB’s proven motor development and wear-resistant heavy-duty bearings made of SSiC or carbon make for a reliable and economical operation. The pumps are suitable for operation on a frequency inverter, which allows them to be precisely adjusted to variable system requirements. Depending on the design, flow rates reach up to 150 cubic metres per hour at 50 Hz and up to 195 cubic metres per hour at 60 Hz. Heads of up to 100 metres at 50 Hz or 140 metres at 60 Hz underline the high performance of this type series. The pumps are designed for nominal pressures of up to PN 16 and operate in a fluid temperature range of –50 to +120 degrees Celsius. They are suitable for ambient temperatures of between –50 and +85 degrees Celsius. EtaSeco pumps are designed for smooth, low-vibration operation, thus contributing to low-effort and stable system operation. The range of materials available for sealing elements, for example EPDM for water/glycol mixtures and FKM for oil applications extend the pumps’ compatibility with numerous fluids. www.ksb.com

#cannedmotorpump #hermetically #KSB #lifecyclecosts

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Keeping the water where you want it in tunnel construction

Technical paper by Pablo Garcia As well as rock and soil, major tunneling projects involve the movement of large volumes of another important element: water. The selection, operation and maintenance of pumps and related equipment can therefore have a significant impact on costs and schedule compliance. Tunneling technology has developed rapidly over the past few decades delivering shorter travel times and safer journeys through mountainous areas or below more congested areas. Tunnels have the potential to improve transport links, supporting infrastructure and thereby the wider economy. However, where there are tunnels, there is water and its management is a key consideration in any major tunnel construction project. Engineering teams may have to extract significant volumes of water from the construction site in order to stabilize the ground or prevent flooding of the work area.

Dewatering in Swedish tunnel project. Tunnel boring machines and drilling equipment require a reliable supply of cooling water, which must be recovered, extracted and treated after use. In addition, personnel working on site need access to safe, clean water for drinking and sanitation. Each of these applications may involve multiple stages of water management. Water removed from a work site might first be transferred to settling tanks underground, for example, to reduce its solids content before it is pumped to the surface. Once there, it may undergo further treatment stages, either on or off-site to bring it to a condition suitable for safe discharge back into the environment.

Dewatering installation with Sulzer XJ drainage pump. Pumps for all purposes Together, these water management tasks mean tunneling projects require numerous pumps. It is not uncommon for a large project to operate several hundred pumps across the worksite for the duration of construction, ranging from small submersible units to very large components for large volume dewatering applications. In tunneling, pumps are critical items for maintaining suitable working conditions and hitting production targets. If a pump fails, or underperforms, tunneling operations may have to stop, leading to costs and schedule over-runs. Therefore, the selection and specification of pumps and associated equipment requires significant attention and specialist input. Ideally, conversations with equipment providers should begin early in the project. During the design phase, a pump supplier will not just be able to make recommendations about the most appropriate type, number and size of pumps for a given application; they may also be able to suggest novel solutions that lead to significant cost savings and performance improvements over the lifecycle of a project. Selection criteria Pump selection is based on a number of parameters. The most fundamental of these are the required flow rate and head. Deeper construction sites inevitably require larger, more sophisticated pumps. A third key factor in construction applications is the quantity of solids in the water. Heavily contaminated water can damage or block a pump of unsuitable design, and manufacturers have developed their ranges to handle particular levels of contamination. Drainage pumps are designed for water with a low solids content while slurry pumps can tolerate mud mixtures with up to 70 % solids. The performance requirements for pumps in tunneling applications are varied. While slurry pumps can operate to heads of up to 95 meters, the high-pressure pump designs required for deeper applications are prone to rapid wear if used with heavily contaminated water. This can create the requirement for additional settlement, or other water treatment processes, underground prior to extraction. In long-term, large-scale dewatering applications, the energy consumed by pumps can comprise a significant part of their total lifecycle costs. High-efficiency pump designs, which may have a higher initial cost due their materials and construction, can often deliver significant savings. The pump supplier should be able to provide comprehensive through-life cost calculations to support their recommendations.

Service and support When selecting a pump supplier for a major project, engineering and procurement teams should consider additional factors beyond the basic technical specifications of the equipment. The supplier should have a broad portfolio of products to meet all the project’s needs. Sourcing from fewer vendors simplifies procurement and vendor management activities, as well as the handling of operational issues like the provision of spare parts and technical support. Vendors should have the scale and local presence to fully support the project. While every engineering teams aims to minimize uncertainty before work starts, underground operations are never entirely predictable. If the pumping requirements change significantly during the course of a project, it is important that additional or upgraded equipment is readily available. Finally, the supplier should have the resources, capabilities and expertise to support its products in a demanding construction environment. The ability to quickly resolve an issue on a pump operating hundreds of meters underground in a remote location can avoid significant delays for a project. Companies with experience in major projects have developed specialized support capabilities, for example providing containerized service facilities that allow tools, equipment and an appropriate inventory of spare parts to be held on site for 24/7 availability. For a cost-effective and reliable dewatering project, it is important to assess the ability of providers to deliver a comprehensive range of products with all the necessary technical support and maintenance inventory. This will reduce project complexity and ensure that every pump is correctly matched to its application for the duration of the construction project. www.sulzer.com Read the full article

#construction #Deltap #drainage #lifecyclecosts #lifecycle #service #slurry #submersible #Sulzer #tunneling