The highlow pressure seal hlps from freudenberg sealing technologies is a fieldproven, specialtydesigned high pressure radial shaft seal. Spring retainer positions and centers the spring, aiding the concentricity between. Mechanical shaft seal by tamar company that replace mechanical seal and specializes in development mechnical sealing systems is the patent solution for you. Mechanical seals were originally designed to lend a greater sealing capability than could be achieved using common packing. One part of the seal, either to static or rotary portion, is always resiliently mounted and spring loaded to accommodate any small shaft deflections, shaft movement due to bearing tolerances and outof. Pump mechanical seal centrifugal, horizontal cn seal m series user manual this copy of the manual is a translation of the italian version and both manuals must be always furnished together model.
Since our subject is dealing with pumps, lets first explore a basic. No rubbing friction between shaft and seal parts replace packing with a mechanical seal and avoid expensive shaft or sleeve replacements. Our mechanical seals promise long life, reduce maintenance, and provide automatic selfadjustment. Mechanical seals for mixers and specialty equipment. Mechanical seal installation location in pump a mechanical seal is installed on the impeller rotating shaft. Mechanical face seal replacement how to use this catalogue locate the manufacturer of the equipment. This prevents the liquid from leaking through the clearance between the pump body and the shaft.
Mechanical seals technical manual brenner industrial sales. Mechanical seals move the point of the seal away from the shaft to specially designed sealing faces that gradually wear down. One face is fixed to the equipment casing or vessel, while the other is fixed to the shaft. We will manufacture and design seals to suit any customer requirements. As previously stated, a pump with a throughshaft is not leakproof.
Mechanical seal working animation types of mechanical seal duration. 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. Mechanical shaft seal types and sealing systems grundfos. Introduction to failures failure of the mechanical shaft seal is the most common cause of pump downtime. Since our subject is dealing with pumps, lets first explore a basic understanding of the need to. B s haft size a type k, r, and t shaft size a seal o. As mechanical seals can be used to seal a myriad of different products on an equally vast array of equipment, we will be primarily focusing on the use of mechanical seals on rotating shaft pumps. Position 1 codes position 1 of the mechanical shaft seal variant code shows the grundfos type designation. It reduces leakage between the pump and the surroundings to an absolute minimum. This video was made using our mechanical seal basics training software which covers a large range of seal types like pusher seals, nonpusher seals, cartridge seals, split seals, double seals.
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. Pump mechanical seal centrifugal, horizontal cn sealm series user manual this copy of the manual is a translation of the italian version and both manuals must be always furnished together model. The seal between the rotating member and shaft or shaft sleeve 4. Mechanical seals the shaft seals used in rotating machinery such as pumps, hydraulic turbines. Type 21 elastomer bellows seals john crane mechanical. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets a stationary seal may also be referred to as packing. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pumpmixersealchamber housing. Because mechanical shaft seal failures are the number one cause of pump downtime, we decided to dedicate this column to mechanical seal basics. A mechanical seal, figure 1, consists of a stationary member seat. A mechanical seal is simply a method of containing fluid within a vessel typically pumps, mixers, etc. Years ago, most pump shafts were sealed using rings of soft packing, compressed by a packing gland, but this type of shaft seal required a fair amount of leakage just to lubricate the packing and keep.
A mechanical seal having a movable ring and a stationary ring with recesses provided in the opposed faces of said rings. The variant code of mechanical shaft seals is stamped on the pump nameplate. The asp type 1 mechanical seal single spring seal dimensionally conforms to astm f151194 and for most applications is a direct drop in replacement for an original equipment seal. 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. Must be finished in the same manner as the rotary face. Wherever a rotating shaft moves fluid, mechanical seals play a key role in sealing process fluids in, keeping contaminants out, or both.
The manufacturer listings are alphabetical, refer to pages 7. Mechanical seals for rotating shaft applications move the point of the seal away from the shaft to specially designed sealing faces that gradually wear down. Gogoal mechanical seal type1 shaft size 1 38 inches replace john crane type11 38 inches for industrial pump and water pump 4. The standard also describes the shaft seal designation and material codes to be used. Flexible seals means longer service life compared to packing, mechanical seals are more flexible, and are able to compensate for shaft deflection, axial and radial end play, vibration and seal face wear.
Radial shaft seals freudenberg sealing technologies. The hlps is a severe duty pressure seal and has a unique design with several features that greatly improve its overall performance. We offer a wide selection of head types and mating ring designs and stock thousands of seals in differing materials of construction. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators, turbines, compressors, centrifuges, and blowers. Mechanical sealmixer application data sheet customer contact info. Popular mechanical seal mating rings come in ceramic white and sintered nickeliron gray. When sealing a centrifugal pump, the challenge is to allow a rotating shaft to enter the wet area of the pump. Loosen and remove the rotating assembly of mechanical seals 433. In plan 11, product is routed from the pump discharge to the seal chamber to provide cooling for the seal and to vent air or. The type 21 is ideal for use in centrifugal, rotary and turbine pumps, compressors, chillers and other rotary shaft equipment.
Tamar mechanical shaft seal can easily replace mechanical seal. Stationary face the mating ring against which the seal face runs. All face seals require a secondary seal, which can be some. Sep 17, 2014 because mechanical shaft seal failures are the number one cause of pump downtime, we decided to dedicate this column to mechanical seal basics. Unlike an oring seal, the hydraulic diameter of a bellows seal is not a fixed geometric value. This facilitates the exchange of shaft seal information between shaft seal suppliers and users. With a lower k value, the safety against thermal overload will increase, but the mechanical seal may also lift off more easily.
Mar 04, 2014 mechanical seal working animation types of mechanical seal duration. The type 16 incorporates the same crimped head design and hextorque drive as our. A secondary elastomer bellows seals the primary ring to the shaft. These mechanical seals are applied in a wide range of industries, including petroleum refining, chemical, paper milling, steelmaking, water supply. Water, oil, and chemical mediums with weak corrosion. Multispring seal double, double cartridge seal, reservoirs and wave spring seal protected spring. Mechanical seal applications mechanical seals the shaft seals used in rotating machinery such as pumps, hydraulic turbines, agitators and centrifuges play an important role in maintaining the safety and economic efficiency of machinery. Our innovative, awardwinning mechanical seals for pumps, agitators, mixers, and other rotating equipment simplify installation, improve reliability, and extend the performance of fluid handling. Mechanical shaft seals seal pumps designed for oem or mechancial seal conversions from braided pump packing. Mechanical seal basics a mechanical seal is a device that houses two highly polished components known as faces. To install a seal, the pump would have to be taken offline and disassembled.
A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage e. The shaft seal is exposed to widely varying operating conditions. One face is fixed to the equipment casing or vessel, while the other is fixed to the shaft and so. As previously stated, a pump with a through shaft is not leakproof. Shaft seals combined materials stationary ring ceramicsictc rotary ring carbonsictc secondary seal nbrepdmviton spring and punched parts steel working conditions mediums. Before the advent of mechanical seals, pump users relied primarily on rope or braided style packing to achieve a seal around the shaft. Nippon pillar has provided various types of mechanical seals with secure high gastightness since 1951 when the company first developed a mechanical seal to prevent the leakage of hazardous fluids. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pumpmixer sealchamber housing. The seal ring which rotates with the shaft is called the rotary ring. Use the dimensional cross reference by shaft size guide pgs.
Mechanical seals are one of the most effective ways of sealing rotating shafts, consisting of two lapped faces arranged perpendicular to the axis of the rotating shaft. These mechanical seals are applied in a wide range of industries, including petroleum refining, chemical, paper milling, steelmaking, water supply and sewerage, food processing and ship building. The speed of the shaft and the materials of construction of the mechanical seal are of even greater importance than a flushedlubricated seal. This document is intended to clarify what to expect on mechanical seals found in colfax products. Owing to this arrangement, the resistance to the flow through a clearance between the rings varies depending on the manner in which the recesses in the rings register one with another when the rings rotate relative to each other, the seal operates under.
American seal and packing delivers a full range of seals split, metal bellows, cartridge, single spring, configurations and component materials seals fluid moved by any equipment. Mechanical shaft seal tamar tech mechanical sealling. American seal and packing delivers a full range of seals split, metal bellows, cartridge, single spring, configurations and component materials. Automatic adjustment compensates for abnormal shaft end play, runout, primary ring wear and equipment tolerances. Skf industrial shaft seals and accessories are divided into three main groups. This gives rise to the alternative name radial face seal, pump seals or packings. Single and double lip radial shaft seals rated for pressures up to 90 psi. Our generalpurpose type 21 mechanical seal has become the industry standard for oem designers. Mechanical seals ekk technologies eagle industry co.
Chesterton company for expertise in mechanical seals in design, selection, installation, field service. One of the two faces rotates rotary with the pump shaft and the other face does not rotate stationary. As a comprehensive manufacturer of pumps, torishima has never lost sight of the importance of. It is in the last position of the type designation and consists of four letters. The chapter describes mechanical shaft seals used in grundfos pumps as examples of the variety of shaft seal solutions for different. Single spring mechanical seals mechanical shaft seals. Mechanical seal operates in gas phase at top of mixer vessel providing unique corrosion and heat transfer characteristics forces on long shafts create shaft runout at the seal weight of the shaft and impeller must be supported by bearings in the gear box hydraulic upthrust of the shaft must be contained. Mechanical seal installation location on shaft mechanical seals are mostly comprised of two rings. European standard en 12756 defines the principal dimensions for the installation of single and multiple mechanical shaft seals into pump housings. 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. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pumpmixer seal chamber housing. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1.
This article will explain what a mechanical seal is and the key design features that make them work. Mechanical shaft seals pty ltd was established in 1989 and produce a wide range of seals to the international iso9001 quality system. Mechanical seals are leakage control devices, which are found on. Plan 11 is the default seal flush plan for all single seals. Mechanical seal basics and seal selection process training. A mechanical seal is a method of containing fluid within a vessel typi cally pumps where a rotating shaft passes through a stationary hou sing or occasionally. Mechanical seals have the purpose of preventing leakage of a fluid. Silicon carbide due to the low friction generated between these two faces. Mechanical seals standard oem mechanical seals uk seals. A seal piping plan is designed to improve the environment around the mechanical seal and therefore increase the performance and reliability of the seal. An oring or cup seal seals the mating ring in the housing. The mechanical seal itself is the interface between the static and rotary portions of the seal. Mechanical shaft seal by tamar can fit any equipment such as.
Other metal parts except seal cover and shaft sleeve. Viscous and sticky products creamy products, ointments, cosmetics, gels, etc determining the mechanical seal design and the appropriate materials for each application is essential in order to cut costs. Remove the stationary mating ring of mechanical seal 433. Differ ent seal types within these groups are described the skf. Mechanical seal technology and selection eagleburgmann. The mechanical shaft seal is essentially a throttle arranged around the shaft. Mechanical shaft seal tamar tech mechanical sealling solutions.
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