Mechanical seal types there are a number of mechanical seal types, each providing advantages for specific applications. Gpa seals are very forgiving because of their simple design. A technical seminar on types of mechanical seals presented by n. We also provide a huge range of equipment specific mechanical seal replacements for all major global pump manufacturers. We offer blank stock, various impregnations and have the capability to machine intricate seals with polished faces. Water, oil, and chemical mediums with weak corrosion. Mechanical seals first in a series by ann attenasio. Mechanical seals are used in industrial pumps, compressors, and other applications where a spinning shaft protruding into a wetted process is likely to have continuous, rigorous duty. These seals are generally used in sewage applications and waste water pumps. Table 3 approximate pv limit values for generic mechanical seals for several material com binations and fluid types. These seals are also suitable for industrial pumps. John crane type 1 replacement seal mechanical seals. All of our seals, from the blending of raw materials to the finished product, are made inhouse by our.
This seal design was amount the first single spring seals and proceeded the slightly less expensive type 21 seals. This is generally correct, but there are applications for which mechanical seals represent too much technology, and services for which they are not suitable see the. Mechanical seal ea111for refrigeratrion compressors. Contactless slot and labyrinth seals are extensively used in hydraulic equipment and oil and fuel systems in addition to contact seals made of elastic materials rubber, leather and the like. 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. Type 2 elastomer bellows seals john crane mechanical seals. We have a comprehensive range of seal assemblies and designs, backed by inventory.
For double mechanical seals backtoback en specifies the short type only. Miyou is kettle using mechanical seal manufacturer in china. Klozure mechanical seals for pumps, agitators mixers and other rotating shaft applications are available in both lip and face seal designs in four primary styles and a wide range of sizes. Bbc pump and equipment company supplies superior pumps, equipment and systems. Mechanical seals are typically used in applications for superior sealings. Jun 10, 2017 ningbo grandbroad mechanical seals mfg. The rotating and stationary components are unitized with the stamped sleeve, providing ease of installation. Mechanical shaft seal types and sealing systems grundfos. 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. Our reactor using mechanical seal adopt appropriate rotating and stationery rings materials as well as clean lubricating media, which can reduce the load factor of the end face and prevent heat distortion of the product, thus avoiding abrasion of the end. The lessons in this course train participants to work effectively with mechanical seals. Mechanical seals are widely considered superior to the other forms of shaft seals employed in centrifugal pumps, particularly packed stuffing boxes and breakdowntype seals. Type 1 elastomer bellows seals john crane mechanical seals.
There are many types of mechanical seal, ranging from simple single spring designs to considerably more complex cartridge seal types. Feb 26, 2001 mechanical seals are important in many industries such as process, automotive and aerospace. Mechanical seals and more sealing technology by eagleburgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. The oring was developed in the 1930s but not used in mechanical seals until after world war ii.
As mechanical seals can be used to seal a myriad of different. Must be finished in the same manner as the rotary face. Our seals are totally interchangeable with all other manufacturers equivalent seals. 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. Shaft seals can take many different forms, but all serve the common purpose of keeping the liquid in the pump. At utex, we refer to this type as rs1 the assembly shown in the pump is configured with a. Seal types include type 1, 2, 6, 6a, 21, 21a and 2106g series, all with a range of shaft diameters from 12 to 3 34 inches.
As a company the majority of our business is in mechanical seals. In the packingdriven system used to drive the rotating ring, the seal is clamped to the shaft by the tightening force of the packing. Alton way, unit i centennial, colorado 80112 303 7582728. Some common types of pump seals michael smith engineers. Consequently, this mechanical seal can be operated without maintenance for a long period of time and are extremely effective, efficient, reliable and economical. Uk seals supply all common industry standard mechanical seal types and dimensional standards.
A mechanical seal is a shaft sealing device, which forms a running and dynamic seal between the rotating and stationary parts of a rotary equipment, developed to overcome the disadvantages of the traditional compression gland packing. Spring retainer positions and centers the spring, aiding the concentricity between the spring and. Carbongraphite was not widely used as a seal face material until after world war ii. A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage e. With our free email newsletter excellence in practice, you will receive firsthand information about current products, services, references and worthwhile industry insights. Soft packing was used as secondary sealing elements. Mechanical seals allow a minuscule almost drop by drop leakage past the seal face to lubricate it to slow seal wear. Rua javaes, 441443 bom retiro, sao paulo brazil cep 01010. This includes the supply of new mechanical seals for all applications, repairs for all makes of mechanical seals and technical advice. Probably the most widely recognized and also most common mechanical seal used in general service, low pressure applications.
Seals are an important aspect of machine design where pressurized fluids must be contained within an area of a mechanical design engineering handbook. John crane type 21 replacement seal mechanical seals. Mechanical seal presentation 1 linkedin slideshare. The mechanical seals course consists of four lessons designed for persons with a basic understanding of the operation and maintenance of pumps, agitators, and rotating equipment. Essential elements of a mechanical seal mechanical seal components essential requirements for proper operation of a mechanical seal the fluid in the pump and seal area. The type 2 mechanical seal is available in single, double and balanced arrangements. Mechanical seals a type mechanical seals manufacturer from. Mechanical seals with over fifteen years experience, dichtomatik is providing seals from a leading manufacturer of mechanical seals for many different industries. 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. This article looks at classes of seals, materials selection, surface finish and design. Mechanical seal engineering pty ltd is an australian owned business with over 50 years experience in the industry. Preset double cartridge design easy installation also available in single face.
Seal type the mechanical seal shown in the pump photograph is a type 1 mechanical seal. Mechanical seals in the 1930s often used a face combination of hardened steel versus leaded bronze. Mechanical seal technology and selection eagleburgmann. Historical development of a mechanical seal what is mechanical seal reason for using mechanical seal advantages of using cartridge seal. Techmachine design 16481d1509 gudlavalleru engineering college sheshadri rao knowledge village, gudlavalleru, pin. Reactor using mechanical seal, dry milling type mechanical. 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. We have been selling new seals as well as offering mechanical seal repair services now for 28 years. We supply mechanical seal and seal material, mechanical seal including mechanical pump seal, industrial pump seal, auto cooling pump seal, shaft seal, seal ring, carbide seal, etc. Mechanical seals move the point of the seal away from the shaft to specially designed sealing faces that gradually wear down. Our mission is to provide customer oriented service through the proper application of quality pump equipment.
Marys carbon custom manufactures a variety of seals grades to suit any application. Loosely inserted seal face provides selfadjusting capability. Mechanical seal handbook pdf get file mechanical seal handbook pdf. Single spring mechanical seals mechanical shaft seals. With its proven track record of exceptional performance, the type 1 elastomer bellows seal is widely recognized as the industrys workhorse. Threaded type, where the sleeve is threaded on one end.
Symbols a area of sliding face a h area hydraulically loaded by medium pressure b width of sliding face. To install a seal, the pump would have to be taken offline and disassembled. We are dedicated to providing the best mechanical seal services in australia. For the purposes of this discussion, consider that a mechanical seal will outperform common types of packing. Fits equipment with confined space requirements and limited seal chamber depths in pumps, mixers, blenders, agitators, compressors and other rotary. Instead the torque is driven along the rubber bellow which fits on the shaft. There are various types and arrangement of the mechanical seals being used for the centrifugal pumps.
The chapter describes mechanical shaft seals used in grundfos pumps as examples. Gpa seal catalog 3 material selection figure 1 the gpa was the first mechanical seal specifically designed to handle highly abrasive slurries. The functions, operation, and repair of common mechanical seals are demonstrated. Fabricated using high grade material and fitted with qualitative components, our industrial mechanical pump seals are used in diverse industrial and domestic arenas. The reactor using mechanical seal are ideal for the sealing of stirring shaft. This allnew cr seals handbook from sf combines or best ideas and insihs from he ast and he resen we hoe i beomes yor. Mechanical seals move the point of the seal away from the shaft to specially designed sealing faces. The initial closing force ensures that the seal will function properly from startup. Mechanical seals explained the basics mechanical seals are leakage control devices, which are found on rotating equipment such as pumps and mixers to prevent the leakage of liquids and gases from escaping into the environment. Seals have more flexibility than packing and are able to compensate for shaft deflection, axial and radial end play, as well as vibration and wear of the sealing faces. Key products include ps ii lip seal, syntron rp shaft seal, pk component seal, and the gmp series of single and double cartridge seals. An outsidemounted spring results in a compact working height that enables it to fit very short stuffing boxes. Suitable for a wide range of service conditions ranging from water and steam to chemicals and corrosive materials, the type 1 mechanical seal is ideal for use in pumps, mixers, blenders, agitators, air. Pdf analysis of mechanical seals for highspeed centrifugal.
Analysis of mechanical seals for highspeed centrifugal gas compressors article pdf available in research journal of applied sciences, engineering and technology 415. Mechanical seals according to en 12756 code system for single mechanical seals there is a distinction drawn between standard n and short k types. Popular mechanical seal mating rings come in ceramic white and sintered nickeliron gray. H and l types are typically singlespring seals, while the m types are multispring units. Mechanical seals are important in many industries such as process, automotive and aerospace. Figure 1 shows a typical centrifugal pump, which highlights its constituent parts, including the mechanical seal. We know you take cases like this very seriously, and so do we. Mechanical seal archives bbc pump and equipment company, inc. Feb 06, 2018 a mechanical seal is a device that helps join systems or mechanisms together by preventing leakage e.
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