In these heavyduty applications, the packing is often required to support the ram as well as maintaining a highpressure seal. It is essential to select the highest quality fibre packing that will last. For understanding the gland sealing system first we have to understand why it is required so there are two main reason. Effectiveness the material appears to be extremely effective, espe. In this article, we will see the difference between the mechanical seal and gland packing mechanical seals vs gland packing. Rod pressure and oil wiper packing rings hoerbiger is a leading supplier of rings and packing for reciprocating compressors. The gland sealing steam system provides lowpressure steam to the turbine gland in the final sets of labyrinth packing. Todays packings come in a wide variety of choices, with something for nearly every. Selection and replacement of packing what is in this lesson.
Aesseal packing displays an exceptional level of resilience and conformity of volume. Gland packing gland packing for all types of mechanical. Flanged gland seals consist of an outer housing, multiple rings of packing and a follower. Then, the gland on the back of the stuffing box is tightened to compress the packing between the shaft and stuffing box wall. Sealing systems for pumpssealing systems for pumps part ii presented by. Although mechanical seals had been around for many decades and now it. Table of contents download guide pdf plate seal waste pack seal split gland seal flanged gland seal several types of shaft seals are available to prevent contamination of bulk materials being conveyed or. For the sealing of installations and equipment in the chemical, pharmaceutical, food processing, oil. Packing for centrifugal pumps packing in a pump is intended primarily to restrict leakage around the shaft.
This system combines highcapability bearing structures with either. Seal gland stuffing box oudo yu g rotating face stationary face. Pumpnseal australia is an australian owned and operated company established in 2000. This formulation creates a unique, longlasting packing that expands easily under gland load which keeps. Mechanical sealmixer application data sheet customer contact info. The surface finish of both the stuffing box and the shaftstem are vitally important to achieving a tight seal. Labyrinth packing an overview sciencedirect topics. Stuffing box design and installation of compression packings. Graphite packing such as our 0686, 0687 and 0688 can be run virtually leak. Gland packing offering you a complete choice of products which include rex ri 9 ptfe fiber packing, rex ri 450 gfo gores ptfe graphite packing, rex ri 99 ptfe graphite gland packing, rex ri 27 pure aramid fiber. Therefore, a company using mechanical seals and jcb seal kit can definitely achieve the environment target and reduce the cost of effluent disposal. Vulcan seals offer an extensive range of 20 gland packing types with a vast variety of materials and constructions to suit a wide range of industry applications. Gland packing is often used instead of a mechanical seal as packing is cost effective, easy to install and can be used in various types of products.
Compression of the packing by the gland follower does not create uneven. Upon completion of this lesson, you should know andor be able to do the following. Characteristics braided packing of natural cotton yarn with tallow and red. Pump technology changes communities how to avoid compression. On difficult applications the will groove and wear shafts and sleeves. A specialist supplier of process pumps, pumping systems and sealing. Shelby scottshelby scott western region john crane incjohn crane, inc. The ptfe yarns are further vacuum impregnated with ptfe dispersion to enable the packing to handle steam. As a subsidiary of associated pump engineers uk ltd, muchina. Its still a very popular method of sealing pumps because of its low upfront cost, easy installation, and readily available. Gland packing costs are low in comparison to downtime costs that plants may incur from factors such as machinery wear and gland. In these heavyduty applications, the packing is often. Integral gland wrench standard on all clampseal globe and gate valves, the integral gland.
It is intended to fill the annular space between the box and shaft so the packing may come as. Support is particularly necessary when the ram is horizontal. Oring loaded ucups are designed as lip seals and seal. If you tighten compression packing to achieve zero leakage, you will burn the packing and cause immediate failure. Pure ptfe teflon packing with oil lubricant asbestos hand gloves asbestos cloth ptfe teflon graphite packing asbestos apron asbestos tape hollow core gland packing asbestos boiler suit asbestos lagging rope soft 100% gfo packing asbestos shoes asbestos ptfe packing. Here is a comparison between gland packing and mechanical seals, and how you can decide which one is right for you. Vulcan vt9d is solely manufactured from pure ptfe in the form of fine multifilament yarns.
Gland packing designed to minimise maintenance costs. Typical seal and gland dimensions are shown below for both rod and piston applications. Characteristics braided packing of natural cotton yarn with tallow. Garlock compression packing products will contribute to. Gland packing and gasket solutions chesterton hubspot. How does the steam turbine gland sealing system work. Packing seal packing seal,graphite packing sealfood grade sealptfe packing seal teadit gasket sheet, gland packing. As of the date of this publication, the author was unable to determine the composition of the pastelike material. Their high quality design and construction requires less pressure on the gland to form the seal, which leads to less wear on the equipment, less maintenance and most importantly, increased packing life span.
Through advancements in materials, design and technology, garlock is now able to seal the. Lips of seal should point toward the long bearing side of the gland. It serves as a seal between the gland and the head. Rex is a manufacturer and exporter of world class sealing, packing and insulation products including jointing sheets, fabric expansion joints, gland packing, hightemperature fire sleeve, ropes. General packing installation instructions industry packing. As turbine exhaust is connected to a condenser which is operated below atm pressure so there are chances of air ingres or va. Gland packing acts as a protective sleeve over a cable or for piping in applications where pressure or other factors pose as a threat. A compression packing seal is established by installing the.
Rugged, easy to use and breakin, the 1730sc is designed for use in general service applications such as agitators, blenders, mixers, or any other applications that. Although gland or packing seals have been the default sealing method of choice for many years, mechanical seals provide many operational benefits and should also be considered. Once compressed, the packing expands, exerting a radial force to. The original oring may be left in place, unless it is known to be leaking fluid flow. Compression packing products were once used to seal visible leakage in valves and control leakage in pumps. To avoid tearing or nicking, the use of oring lubrication is recommended while installing the oring into the dovetail gland. Gland packing costs are low in comparison to downtime costs that plants may incur from factors such as machinery wear and gland maintenance.
On difficult applications the leakage ratio between seals and. Difference between mechanical seal and gland packing. Gland packing and static sealing principles identify and describe packing materials and constructions define a compression packing and basic terminology define packing sets, packing gland, stu. Sealing systems for pumpssealing systems for pumps part i. This assists the labyrinth packing in sealing the turbine to prevent the entrance of air from reducing or destroying the vacuum in the associated condenser. As turbine exhaust is connected to a condenser which is operated. Garlock packing is designed to give the user the greatest. It is intended to fill the annular space between the box and shaft so the packing may come as close as practical to the shaft or shaft sleeve without actually contacting it, and thus restrict the leakage. They should be tightened until you can feel the packing resisting slightly. Todays packings come in a wide variety of choices, with something for nearly every application. Aug 04, 2010 john mckelvie and wayne plata from griswold pump company show how to install a packing gland on a griswold 811 ansi centrifugal pump.
A procedure for determining the correct packing size and quantity. Then, the gland on the back of the stuffing box is tightened to compress. Pressure seal backseat the pressure seal backseat provides maximum. Gland packing offering you a complete choice of products which include rex ri 9 ptfe fiber packing, rex ri 450 gfo gores ptfe graphite packing, rex ri 99 ptfe graphite gland packing, rex ri 27 pure aramid fiber packing, carbonaceous aramid fiber packing and synthetic ptfe fiber packing. To provide you with confidence in servicing your customers, the most common sizes and styles of our gland packing are stock guaranteed and available for same day despatch. Gland packing rex ri 9 ptfe fiber packing manufacturer from. A guide to gland packing, selection of gland packing. Three dimensions are necessary to completely define a seal gland. Our patented split seal technology addresses the inherent limitations found in conventional cartridge split seal designs by minimizing installation complications and excessive leakage. Chestertons wide range of gasket products means that we can address flange sealing needs from water to critical hightemperature, highpressure process.
Take up gradually on the gland as the packing seats, until leakage is reduced to a tolerable level, preferably 810 drops per minute, per inch of shaft diameter. The chesterton 442c cartridge split seal combines superior seal performance with the ease of installation of a cartridge seal. Ptfe gland packing, non asbestos industrial packing, asbestos. Our patented split seal technology addresses the inherent limitations. In our opinion, this outstanding range of products and services make aesseal the best choice whatever your seal or packing requirements may be. Although mechanical seals had been around for many decades and now it replaced gland packing in many application. Pumpnseal pumps mechanical seals gland packing training. Therefore, it is of the utmost importance to select the highest quality modern fibre packing in an interbraided construction and optimized profile to provide the most resilient, longlasting packing sealing solution. Mechanical seals vs gland packing mechanical engineering site. On an average most gland packing uses 6 times more electrical energy than a wellbalanced mechanical seal. The neck of the gland follower should be inside the. This oring is a static seal and does not normally require replacement. Aesseal offers a selected range of gland packing that have been specifically designed and manufactured to reduce plant operational and maintenance costs.
When the last ring is installed, replace gland follower and tighten bolts or nuts. John mckelvie and wayne plata from griswold pump company show how to install a packing gland on a griswold 811 ansi centrifugal pump. Integral gland wrench standard on all clampseal globe and gate valves, the integral gland wrench igw provides immediate gland packing adjustment capability. Mechanical seals is not a seal but rather a restricting device. Glands previously purchased may have conax engraved on a cap hex surface in lieu of the hex notch. The neck of the gland follower should be inside the stuffing box a minimum of 18. Dec 29, 2015 for understanding the gland sealing system first we have to understand why it is required so there are two main reason.
The follower is used to compress the packing and create a seal between the shaft and housing. The garlock compression packing facility is committed to supplying the highest quality engineered products to industry throughout the world. A guide to gland packing discusses the different uses of gland packings in the engine room, how to measure, cut, remove and insert the gland packing,their properties, selection, the need of lantern rings, the cautions and the precautions in the use of gland packing in engine room of a merchant ship. Through advancements in materials, design and technology, garlock is now able to seal the most difficult fugitive emissions and eliminate pump leakage entirely. Packing materials were originally the sealing method of choice, using soft, flexible materials. Rex is a manufacturer and exporter of world class sealing, packing and insulation products including jointing sheets, fabric expansion joints, gland packing, hightemperature fire sleeve, ropes, bellows, jackets and high temp resistant textiles. A guide to gland packing discusses the different uses of gland packings in the engine room, how to measure, cut, remove and insert the gland packing,their properties, selection, the need of lantern rings.
This assists the labyrinth packing in sealing the turbine to prevent the entrance of air. Gland packing is often used instead of a mechanical seal as packing is. Gland packings dimerpack 1120 applications packing is used for supply and pumping water, autoclaves. Excessive leakage during the first hour of operation will result in a better packing job over a longer period of time. Their high quality design and construction requires less pressure on the gland to form the seal, which leads to. Apr 17, 2018 although gland or packing seals have been the default sealing method of choice for many years, mechanical seals provide many operational benefits and should also be considered. Our gland packings are square braided on the most advanced. Requires leakage or it will burn will seal with invisible leakage. The rate of leakage is higher for gland packing than mechanical seals. Gland packing extensive range eastern seals uk ltd. Garlock packing is designed to give the user the greatest return on initial investment in terms of leakage control, service life, and dependable, costeffective product. To complement this range aesseal also manufactures an extensive range of high quality gland packing.
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