As part of the german freudenberg and japanese ekk group, eagleburgmann is one of the worlds leading providers of industrial sealing technology. Therefore rugged, reliable mechanical seals are essential to maximizing operational uptime. Oring pusher mechanical seals john crane mechanical. Our extensive network of resources enables us to locate the right manufacturer and part, every time. Collecting seal leakage in a closed container keeps fluid from. Buy high quality and affordable burgmann mechanical seals via sales. Mechanical seals are used in industrial pumps, compressors, and other applications to provide a leakproof seal between component parts. Loosely inserted seal face provides selfadjusting capability. We specialize in hardtofind seals and demanding applications.
All books are in clear copy here, and all files are secure so dont worry about it. Robust design suitable for standard metric and imperial housing sizes. Mechanical seal technology and selection eagleburgmann. The mechanical seal mechanical seals have the purpose of preventing leakage of a fluid liquid or gaseous through the clearance between a shaft and the fluid container. B burgmann seals series mg1 are available on demand until 100 mm of diameter. Always on demand the version mg12 with a slightly bigger overall axial dimension can be supplied. Flowserve mechanical seal and seal support system storage experience in motion 1 mechanical seals general note mechanical seals are precision products and therefore require careful handling and storage to ensure reliable operation. The seal ring which rotates with the shaft is called the rotary ring. Introduction to failures failure of the mechanical shaft seal is the most common cause of pump downtime. Mechanical seal handbook pdf get file mechanical seal handbook pdf. If the mechanical seals are stored for an extended period of time before. The complete product portfolio of systems and components for cooling, flushing, pressurization and supplying liquid and gaslubricated mechanical seals e. Eagleburgmann mechanical seals eagleburgmann germany is the competent contact for industrial sealing technology and associated services in germany for more than 125 years. The shaft seal is exposed to widely varying operating conditions.
A double mechanical seal consists of two seals arranged in a series. Eagleburgmann mechanical seal teardown and inspection best practices part 5. Bulletin number twentynine selecting mechanical seals what is a mechanical seal. The clearance between rotating shaft and the passage way through the wall of a housing casing or pressure vessel. The outboard, or secondary seal prevents the flush liquid from leaking into the atmosphere. The initial closing force ensures that the seal will function properly from startup. We know you take cases like this very seriously, and so do we. Mechanical seals according to en 12756 code system for single mechanical seals there is a distinction drawn between standard n and short k types.
A mechanical seal, figure 1, consists of a stationary member seat. Flowserve mechanical seal and seal support system storage. The stationary part of the seal is fitted to the pump housing with a static seal this may be sealed with an oring or gasket clamped between the stationary portion and the pump housing. This successful mechanical seal is notable for a low rate of wear, minimal leakage and high availability, even at high peripheral speeds. The difference between single and double mechanical seals. Function of mechanical seal the function of every mechanical seal is to prevent. Crnimo steel g, duplex g1 cannot be combined with seal face made of s standards and approvals recommended applications for plain shafts single seal unbalanced supersinusspring or multiple springs rotating independent of direction. Compare prices on burgmann mechanical seals shop best. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed. The mechanical seals are now available in wide variety of designs suitable for number of applications. For the purposes of this discussion, consider that a mechanical seal will outperform common types of packing. With our free email newsletter excellence in practice, you will receive firsthand information about current products, services, references and worthwhile industry insights. This article will explain what a mechanical seal is and the key design features that make them work. All face seals require a secondary seal, which can be some.
Double mechanical seals are offered in two arrangements. Mechanical seal single mechanical seals spring rotating ring stationary ring. Seals 7 mg1 seal with independent rotation with silicon silicon rings and viton gasket q1q1vgg n. There are various types and arrangement of the mechanical seals being used for the centrifugal pumps.
Together with the pump the seals form a perfectly matched and optimized system. More specifically, the core of the mechanical seal technology is the tribology friction, wear and lubrication technology used to control the surfaces where the stationary and rotary rings. Mechanical seals are simply another means of controlling leakage of a process where other means are deemed to be less capable of performing the task adequately. As mechanical seals can be used to seal a myriad of different.
Sealing technology by eagleburgmann is used worldwide in oil and gas industries, refineries, the. A definition is better given after the functions of a seal are described. Packing although mechanical seals had been around for many decades, by 1955 industry had converted only a small percentage of pumps from packing to mechanical seals. A seal that leaks after maintenance has been badly installed. One of the two faces rotates rotary with the pump shaft and the other face does not rotate stationary. The mechanical seal technology is a sum of mechanical engineering and physical property technology due to the abovementioned functions and applications. Thinking of making the switch from packing to mechanical seals. The inboard, or primary seal keeps the product contained within the pump housing. Average mechanical seal life has increased significantly during the last 20 years, with improvements in mean time between failure of 50 percent during the last 10 years alone. Our safety stock program ensures that the seal you need is available when you need it. The materials of seal construction, particularly the sealing faces and elastomers. In end or rotatingface mechanical seal designs, the initial closing force is provided by a spring component, which can be a single coil spring, multiple coil back to basics. Mechanical seals for pumps how mechanical seals work. There is no wearing of the shaft or the sleeve on which the mechanical seal is mounted.
There are many different designs of a mechanical seal to meet specific applications. Good wear resistant and frictional pro perties on severe duties high thermal conductivity, better than tungsten carbide good thermal shock resistance. Never put hands on lapped seal faces or put lapped seal parts face down on the workbench. The mechanical seals are robust components so they require very less maintenance. Mechanical seals basics from eagleburgmann youtube. Mechanical seals for centrifugal pumps parts of the mechanical seal. Mechanical seal selection the spring is in the product. Learn more about how eagleburgmann mechanical seals work and interact for maximum performance. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1. Download mechanical seal technology and selection eagleburgmann book pdf free download link or read online here in pdf.
A container holding a liquid or a gas has a rotatable shaft extending through its housing. Bulletin number twentynine selecting mechanical seals. Keep the mechanical seal in its original container until ready for installation. This articles describes some of the commonly used mechanical seal types like cartridge type mechanical seals, balanced type, unbalanced type, conventional, pusher, and nonpusher type of mechanical seals.
There is a lot of science in it but either you have the knack or you do not in which case you need this web site bad. We offer service and spare parts solutions as part of our comprehensive customer care not only for ksb pumps and valves but also for all sorts of rotating. Eagleburgmann has established the high performance shf mechanical seal for use in multistage highpressure boiler feed pumps in power stations. Mechanical seals consists primarily of a rotary seal face with a driving mechanism which rotates at the same speed as the pump shaft, a. The oring retains the sealed liquid and follows along the shaft to compensate for face wear. The seal is comprised of the case, spring, diaphragm, and washer, which come locked together as one piece. A mechanical seal is simply a method of containing fluid within a vessel typically pumps, mixers, etc. Mechanical seal education tutorials mechanical seal. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators, turbines, compressors, centrifuges, and blowers.
Mechanical seals all seals the sealing specialists. If some important dimensions are not marked on the drawings, please draw them and enter values. However, seal service life can fall short of expectations if the seal is exposed to conditions outside its intended operating environment. Sometimes operating conditions change to become quite different from the specific conditions for which the seal was intended. Symbols a area of sliding face a h area hydraulically loaded by medium pressure b width of sliding face. Unlike an oring seal, the hydraulic diameter of a bellows seal is not a fixed geometric value. Mechanical seals ekk technologies eagle industry co. Mechanical seals are complicated pieces of equipment, with a wide variety of materials and configurations to choose from, be sure that what you invest in is exactly what you need for your application. Mechanical seal also available in quench or double arrangement.
For use in waste water, boiler feed, and compressor pumps, these seals have an extralong spring that accommodates variations in seal cavity length. Mechanical seal equivalents cdk seals, unit 11 bartlett park, gazelle road, lynx trading estate, yeovil, somerset. We offer you a broad range of standard products, individual solutions and diverse services. Mechanical seals can now be found in almost every industry. With a lower k value, the safety against thermal overload will increase, but the mechanical seal may also lift off more easily. Extend mechanical seal life fluid sealing association. Among others, you will find current data sheets in pdf format available for download here. Mechanical seals first in a series by ann attenasio. A mechanical assembly for sealing the point where a rotating part usually a shaft passes through a wall mostly a machine housing. Figure 1 shows a typical centrifugal pump, which highlights its constituent parts, including the mechanical seal. Sarbs pump maintenance seminar, june 7, 2012 vessel.
For double mechanical seals backtoback en specifies the short type only. The product pressure acts additional to the spring on the rotating seal part. The system is not accepted, hence mechanical seal preferred as they tend to seal with no visible leak. Mechanical seals are designed to overcome these drawbacks.
Eagleburgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seal leakage in pumps how much, if at all, mechanical seals do, must or must not leak is a controversial subject for which there are few clear answers. The mechanical seals for water, hot water and heat transfer applications are especially designed for the relevant ksb pump type series. Commonly found in marine, textile, paper, refrigeration, wastewater industries and many more. Sealing systems for pumpssealing systems for pumps part i. Sealing systems for pumpssealing systems for pumps part i presented by. Read online mechanical seal technology and selection eagleburgmann book pdf free download link book now. Mechanical seals technical manual brenner industrial sales. A seal that lasts a week without letting go is generally thought to be ok. Every centrifugal pump must accommodate a spinning shaft while mechanically maintaining fluid or gas contained in the wet end of the pump. Approximately 250 employees in 12 regional service centers and sales branches guarantee customeroriented and rapid services. Anderson process partners with leading mechanical seal manufacturers to deliver seals that are engineered to withstand demanding fluidhandling applications, such as those in the pulp and paper and power generation markets. Vulcan balanced and unbalanced multiple spring seal range for corrosive and demanding applications. Characteristically, mechanical seals have two faces sliding one on top of the other usually at right angles to the axis of rotation which are pressed together by axial forces.
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