The trick is to use a good sealer along with the right material in order to minimize the chances of spoilage from air or insects. Another feature in favor of packed gland is that in case of a leakage, it can be adjusted keeping the pump in service where as this is not possible in the case of a mechanical seal as pump has to be taken out of … Gland Selection Guide . Of course, the weight you put on each of these comparison categories will vary according to your immediate and long-term budget, local HSE requirements, technical considerations, space constraints, and integration with existing equipment. With those priorities at the forefront, I think you’ll see that mechanical seals offer some significant benefits compared to gland packing seals. The seals have been tested to IP66 and meet the requirements of the standard. And you should seek the guidance of local mechanical seal and seal support stem vendors. 2,Have a long time useful life, if choose the right material and pressure of seal face can … Running rotating equipment with packing in the stuffing box is like driving your car with the hand brake on. From initial on-site consultation and custom design of seal support systems to careful assembly and rigorous testing, Swagelok covers the full spectrum of mechanical seal support system services. This will eliminate the need for you to research the mechanical seal options and you’ll be assured of the best possible solutions for your specific needs. Then we discuss the advantages and disadvantages of each option. Mechanical Seals cannot normally deal with pivotal end play. Labyrinth packing is sufficient to prevent steam leakage of steam or air in steam turbine .Low pressure steam is supplied to final seats of labyrinths.Labyrinth-type steam seal, also known as labyrinth steam seal, has the following commonly used structural forms: comb-shaped, D-shaped, and fir tree-shaped. They are less expensive to use compared to mechanical seals. We demonstrate the operating principles of single mechanical seals, double mechanical seals and gland packing. Would this affect your fuel consumption? It is like the brake pad on a car, once damaged, the consequences are unimaginable, so the performance and service life of valve directly affect normal operation of the piping system. In the case of a lip seal , these energizing devices lend their inherent mechanical energy to the seal and allow it to continue to do its job particularly when in a low pressure state, when the sealing media is not engaging the lips. It is mandatory to procure user consent prior to running these cookies on your website. Posted April 17, 2018 by Emily Thompson - filed under Bearings and Power Transmission, Blog. Your fluid systems can't fail—and they can't leak. Globe Valve Parts. Through the packing and shaft surface contact pressure, it prevents the medium leakage to achieve the purpose of sealing. High beginning expense. But opting out of some of these cookies may affect your browsing experience. Packing is a relatively simple process. However, leakage can be as much as 10 times greater. To learn how Swagelok Northern California can help you obtain the best performance from mechanical seals that have replaced gland packaging seals, contact our team today by calling 510-933-6200. Paul holds a B.S. Advantages and Disadvantages of both Repairing and Replacing of each. They ... (3.14 x 152) / 4] x 20 = 3.532 kgf has reached a fairly high dimension and this force can deform the seal only if it is met by elastomer seals ... wear of sealing surfaces (sphere and / or gasket) and leakage of packing. Top Gland Packing Seal Advantages and Disadvantages to Consider in Comparison to a Mechanical Seal by Paul Lesnau , on 9/24/20 8:45 AM At some point in the life cycle of older pumps that still use gland packing seals to prevent, or, more accurately, limit process fluid leakage, you’ll look at the maintenance records and wonder if gland packing seals are still the best option. Swagelok has more than five decades of experience in helping petrochem refineries successfully make the transition from gland packing seals to mechanical seals and seal support systems. A soft material is stuffed into the gap between the pump and the shaft, preventing most leakage. Whether your decision is based on sourcing the highest-quality solution or the most economical, DXP can meet the needs of your application. Replacing a gland packing seal with a mechanical seal can result in long-term savings that more than repay the cost of the mechanical seal and seal support system installation. Although there are disadvantages in using gland packing, there are also good reasons for using them. It’s really an exercise in weighing gland packing seal advantages and disadvantages on a pump by pump basis. You also have the option to opt-out of these cookies. (ii) Self-service Outlets: Nowadays self-service retail shops are becoming very popular, particularly […] Packing seals use rope-like materials that wrap around the shaft of a pump, filling in dead space and minimizing fluid loss. Whether you’re considering mechanical seal vs. packing seal solutions, look to DXP. There’s no question that a mechanical seal—when properly maintained by a seal support system—wins the durability category. While pumps and agitators have large amounts of radial movement and a higher chance of misalignment, packing seals can adapt to the conditions and maintain their integrity. The advantages and disadvantages of packaging depend partly on a person's role in the manufacturing, marketing and consuming process. Contact our team today to learn about custom solutions for your plant or refinery. Basic mechanical seals use multiple sealing points to nearly eliminate any leakage issues. However, this is just one of the many considerations you should include in your cost/ benefit analysis. If you’re concerned about reducing maintenance costs associated with the frequency of inspections and replacements, then mechanical seals and seal support systems require a greater up-front investment but reduce maintenance demands in the long run. Packing seals are also a bit more forgiving than mechanical seals. Typically, carbon fibers have excellent strength and toughness and are considerably less expensive to manufacture. Sets of labyrinth seals are provided . They’ll help you match the mechanical seal solution with the process fluid, temperature, pressure, and environmental conditions of each pump. They also have the ability to handle the higher compressive loads that are required for high pressure services. How Packing Works. This causes the packing to harden and become abrasi… About Paul Lesnau | Sales Manager, Business Development Manager, and Field Engineer. The inclusion of graphite as the second material helps to solve some of the problems associated with PTFE and ePTFE. Monitor seal support system instrumentation to ensure proper seal chamber environment. All Rights Reserved. In many instances, the leakage of process fluid, such as hydrocarbons, equates to lost revenue. When the frictional forces associated with packing begin to generate heat, this heat is trapped near the shaft. Where is it used ... cable seal or support Lead Connection Chamber: Leads non wicking ... Shaft: 416 Stainless Steel and hardware . It requires more space than outspread lip seals. Let’s take a look at several categories of comparison when deciding about gland packing seal advantages and disadvantages: The initial costs of components and installation are a big lure for refineries to select gland packing seals, especially with many refinery budgets running on such thin margins right now. Although mechanical seals can be costlier than packing seals, they are a great investment that can save you the costs of constant packing seal repairs and replacements. Vacuum sealing foods for long-term storage is an efficient way to preserve a wide-range of items. Single mechanical seal . As the cable gland is tightened it compresses the seal, which grips the cable. The cost of repetitive equipment failures can quickly negate the initial advantage of gland packing seals’ lower installation and replacement costs. but only labyrinth packing is not sufficient to prevent steam leakage of steam or air. The Limits of Standard Pump Packing Braided packing is the oldest pump sealing method used in the process and service industry. The first is PTFE, which provides the backbone of the structure and natural lubricity to minimize friction. At some point in the life cycle of older pumps that still use gland packing seals to prevent, or, more accurately, limit process fluid leakage, you’ll look at the maintenance records and wonder if gland packing seals are still the best option. seal support system plans and configuration options, *If you are not located in our service area (northern California and northwestern Nevada), we will route your request to your local Swagelok Sales and Service Center as soon as possible. You can locate the contact information for your local Swagelok Sales and Service center at. Headquarters (map)3393 W Warren AveFremont CA 94538510-933-6200, Login | Locator | Safety | Legal | swagelok.com, Top Gland Packing Seal Advantages and Disadvantages to Consider in Comparison to a Mechanical Seal, Compare the Pros and Cons of Gland Packings vs Mechanical Seals, seal support systems will deliver long-term energy savings. Mechanical seals are more durable than their predecessors and use multiple sealing points to nearly eliminate any leakage issues. In this article, we will explore the globe valve types, parts, working principle, function, symbol, application, advantages, and disadvantages. When choosing the sealing option that’s right for your applications, mechanical seal and gland packing seal offer both pros and cons. This website uses cookies to improve your experience while you navigate through the website. Injectable packing is an ideal pump packing material when you are looking to seal equipment with worn shafts or fretted sleeves. Gland packing is a basic and cheap solution, but over time the fluid loss will increase and the material starts to wear down. This category only includes cookies that ensures basic functionalities and security features of the website. In comparison to mechanical seals, the range of seal support system options is far more complex. these labyrinth seals causes pressure drop along the rotor . Gland at the front end is called front gland and rear is called the rear gland . Advantages and Disadvantages to Vacuum Sealing Foods. Advantages of bellow seal globe valve compared with gland packing globe valve Valves are used as pressure pipeline components to control the connection and cutoff of pipeline fluids. to reduce the pressure difference between atmosphere and inside the casing. Depending on their proximity to the driveshaft bearings, even minute leakage over time could contaminate motor and shaft bearings. There are multiple factors to consider in making that decision. Know about Mechanical Seal in a Centrifugal Pump Mechanical Seal in a Centrifugal Pump - Mechanical seals are the new age sealing product replacing gland packing and old designs associated with it. ePTFE/Graphite for braided packings is made with three components. You can search our list of seals and gaskets to find the solution works best for your business. Advantages: low-cost non-oil resistant material good water resistance, hardness below 70 high hardness with good elastic compression with less distortion can be neutral with most chemicals and dry, zi of the organic-one Disadvantages: * is not recommended to use strong acids, ozone, oils, ester oils and fats, and most of the hydrocarbons being. Mechanical Seal Vs Gland Packing 1. The skills and experience of maintenance personnel play an important role in deciding the better option as well, though. Today's packings come in a wide variety of choices, with something for nearly every application. Gland rings, collars, compression rings, and pins are the other hardware components. These cookies do not store any personal information. Packing seals are removed and replaced much more often than mechanical seals, which causes considerable wear and tear to the pumps as they are disassembled and reassembled. A good example of an industry where packing seals are preferred is mining and ore processing, where packing seals are the economic choice and able to adapt to the large shaft movements and equipment sizes. Gland Seal vs. We also use third-party cookies that help us analyze and understand how you use this website. Reliability and process engineers need to justify the upgrade to a seal support system, though. The stem and seal kit contains a packing bolt gasket, stem thrust washer, chamfered backup ring, stem backup ring, low-temperature fluorocarbon FKM stem O-ring, two seats, low-temperature fluorocarbon FKM seat O-rings, seat backup rings, seat springs, end screw gaskets, gland assembly tool, lubricant with Material Safety Data Sheet (MSDS), and instructions. Dual seal arrangements offer the highest level of protection against leakage, Eventual replacement of packing rings, determined by the quality and consistency of maintenance practices. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. However, I think you'll see that in most circumstances, the benefits of gland packing seals are on the decline—especially as mechanical seal technology improves. 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. The mechanical seals are especially used in the process applications where the pumps handle hazardous chemicals like HCL, sulfuric acid, etc. If chosen and installed correctly, they can last for a very long time. Mechanical seals are more durable than their predecessors and are designed to take much more punishment. Packing seals don’t require that you decouple the drive shaft, leaving a considerably shorter installation time than other types of seals. While in this role, he was able to help provide technical and application-specific expertise to customers and distribution to drive specifications. 3393 W Warren AveFremont, CA 94538Main tel: 510-933-6200Email: Message us. Totally Seals is proud to distribute a wide range of gland packing suitable for different applications. The reason is that the chances of adulteration in such goods are minimised. Mechanical Seal
By Mr. Om Pratap Singh
2. in Mechanical Engineering from North Dakota State University. From the perspective of time and cost, gland packings have the advantage—faster installation because of comparatively simpler design. REPLACE PACKING WHEN LEAKAGE CANNOT BE CONTROLLED BY FURTHER TAKE-UP ON THE FOLLOWER GLAND. In this post, you’ll learn when to use this flexible packing technology and tips for implementing it. This often reduces the working life of the seal making one spend on new seal. On average the majority of gland packing consumes 6 times more power than a balanced mechanical seal. When environmental factors weigh heavily in your decision, mechanical seals and seal support systems offer peace of mind. The result is significant costs tied to unplanned downtime and bearing replacements. There are a wide variety of materials used depending on the kind of material being pumped. Fluid loss will increase as gland packing material begins to wear down and may impair regular lubrication or reduce ease-of-replacement. We offer an extensive range of Gland Packing designed and constructed to minimise maintenance costs. To manufacturers, packaging is an added but necessary expense. Graphite packing fibers may approach the strength of carbon, but have improved lubricity and, as such, are not so abrasive. Gland packing seals have been the default sealing method for many years. Parts of centrifugal pump
3. It’s simple and easy to maintain, which is an advantage for packing. Necessary cookies are absolutely essential for the website to function properly. to meet the safety and the environmental standards as per the federal regulations. However, there are circumstances when packed gland is the ideal option as when dealing with aggressive fluids. Mechanical seals are the ideal choice when seal leakage is not an option for equipment or applications. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Packing materials were originally the sealing method of choice, using soft, flexible materials. They are also easier to install than mechanical seals. This field is for validation purposes and should be left unchanged. When changing packing glands, the pump housing need not be opened up. Some mechanical seal support plans may have on-going supply costs that are canceled out by energy savings. Gland and valve packings, designed to provide a seal between a moving spindle or shaft and the pressurised housing which it penetrates. Here’s why. as discussed earlier . Gland Packing acts as a protective sleeve over a cable or for piping in applications where pressure or other factors pose as a threat. Almost 90% single mechanical seal are installed on regular basis. Before joining Swagelok Northern California, he was the West Coast Regional Sales Manager for an organization based in Illinois involved in pneumatic and hydraulic applications where he supervised product distribution throughout the western United States, Canada, and Mexico. Why sealing required !
Key component of the pump is its mechanical seal. DO NOT ADD MORE PACKING RINGS. 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. Fluid leakage is stopped by either a wedge, V-ring or O-ring as the lapped faces collapse. Prior to the mechanical seals, the compression packing like gland packing were used as the sealants though they are still being used in number of applications. Advantage . Ideal leakage is one drop per minute of process fluid per inch of outside shaft diameter. Contact us today for more information about our sealing solutions. Advantage : 1,Reliable seal ,over a long period of use ,it will not leakage or few leakage. We act as both mechanical seal suppliers and packing seal suppliers depending on what your situation requires. Packings made with PTFE and ePTFE are natural insulators. The following list should be used to ensure that the cable gland selected is correct: • Select the type of cable and identify the correct gland … Disadvantage. Gland Packing Secondary stem seal Gland packing None None Stem Leakage Not Possible since Metallic Bellows are designed to last several thousands cycles Occurs as soon as the ring wear out. Whereas the gland packing is used where leakage of fluid is used for lubrication of gland as well as no hazard or loss of fluid occur. ADVERTISEMENTS: 4 important advantages of packaging are as follows: (i) Rising Standards of Health and Sanitation: ADVERTISEMENTS: As the people are becoming health conscious they like to buy packed goods. http://www.swagelok.com/en/locate-a-sales-service-center, Depending on the pumping process, can be the most economic sealing solution, Can be significantly higher cost, depending on the type of seal, accompanying seal support system, and any infrastructure retrofitting costs, Depending on the type of packing, there may be no need to decouple the driveshaft, Can be installed by maintenance personnel, Requires skilled maintenance engineers to properly install and align, Pump housing must be opened and driveshaft decoupled, Varies greatly, depending on the tightness of gland packing, seal material, and seal lubrication, Overtightening will result in rapid wear and loss of lubricity, With a proper seal support system, mechanical seals should last a minimum of three years, Monitoring of the seal support system and a preventative maintenance strategy can significantly extend mechanical seal life. *If you are not located in our service area, we route your request to your local Swagelok Sales and Service Center as soon as possible. Mechanical Seal – What’s the Difference. Reliability issues in light of limited budgets and increasingly demanding Cal/OSHA and BAAQMD regulations are always top-of-mind lately. In the long run, mechanical seals may pencil out to be the most cost-effective. Typical applications include rotary and reciprocating pumps, compressors, mixers or valve packing. Similarly, a local mechanical seal support vendor with substantial industry experience can advise you on the seal support system plans and configuration options available for each of the mechanical seals that are replacing gland packing seals. ON BOTH CENTRIFUGAL AND RECIPROCATING PUMPS, ABOUT 70% OF THE WEAR IS ON THE OUTER TWO PACKINGS NEAREST THE GLAND.However, each additional ring does throttle some fluid pressure. While one sealing point stays fixed, another rotates with the shaft. Packing seals are typically the most economical choice for sealing solutions, which is why they still widely used. Rope-like material is wrapped around the shaft of a pump and compress the package which minimizes fluid loss. These cookies will be stored in your browser only with your consent. This is usually the case when pump leakage can cause environmental or safety issues. The packing seal is the most commonly used seal type of slurry pumps, it is composed by packing ring, packing sleeve, packing, packing gland, stud bolts and nuts. Since carbon fiber based packings are generally tougher than graphite, they are more resistant to abrasive media. Disadvantages of Packing The other factor, leakage, is an inherent aspect of gland packing seals. Would mechanical seals and seal support systems provide a better long-term solution? We manufacture and assemble reliable, customizable components that get the job done. Mechanical seal vendors can advise you on the latest seal technology and variety of mechanical seal designs that best suit your specific processing needs. That's why Swagelok Northern California offers mission critical solutions for the petrochem, semi, power, and oil and gas industries around the Bay Area and into NW Nevada. But an experienced mechanical seal vendor can explain why an API Plan 21 will provide longer seal life than API Plan 14, how good panel design and instrumentation reduce maintenance costs, or why API Plan 65B is the best solution to manage condensation of medium temperature fluids. Mechanical seals reduce power consumption when compared to gland packing. If you have dozens to hundreds of pumps using gland packing seals, an upgrade to mechanical seals and seal support systems will deliver long-term energy savings, especially with high utility costs in California. Marketers see packaging as a design and information opportunity, while to consumers, it's something to … Packing seal It is common type, injected a certain pressure sealing water continuously into the packing, to prevent leakage of slurry pump: suitable for inline pumps which can not use expeller seal.Gland packing seal has advantages of simple structure, easy maintenance, cheap price. There’s a clear, measurable advantage offered by mechanical seals: they are far more energy-efficient. Visit our. You can locate the contact information for your local Swagelok Sales and Service center at http://www.swagelok.com/en/locate-a-sales-service-center. Depending on process conditions, loss of revenue-producing product, and safety or environmental concerns, the process engineer’s—and even the financial analyst’s—definition of acceptable leakage may be the factor that determines the gland packing vs. mechanical seal debate. Very common. Energy and maintenance are the main factors here. Over time, however, fluid loss will increase as the gland packing material begins to wear down and may impair regular lubrication or reduce ease-of-replacement that is required to function properly. Mechanical seals are preferred over traditional packing seals in diverse applications during which leakage problems should be avoided. Copyright © 2019-2020 Swagelok Northern California. 5. For dual seals, add barrier/buffer fluid as needed to the seal pot, Friction between gland packing seal and impeller shaft can use up to six times more energy compared to a mechanical seal, Results in minimum friction between seal faces and significantly greater energy efficiency compared to gland packing seals, Frequent tightening of the gland to minimize leakage, Supply of seal support system flush, buffer/barrier, or quench fluids—water/glycol, hydraulic oil, or nitrogen, The leakage of wastewater or fugitive emissions can lead to fines or sanctions, Mechanical seal designs and configurations of seal support system options offer the best choice for minimizing the risk of process fluid leakage that could lead to fines or sanctions. We use cookies to personalize and enhance your experience on our site. Ball Valve Advantage and Disadvantage. When formed into packing that is used to sea… *If you are not located in our service area (northern California and northwestern Nevada), we will route your request to your local Swagelok Sales and Service Center as soon as possible. When it comes to deciding on the best sealing solution for your pumps or agitators, newer developments in sealing technology offer more options than ever before. Our philosophy is to offer the most suitable packing for each application from … Seal manufacturers make up for this by loading the seal with an energizing device like an o-ring, or, more likely, a spring. Mechanical seals are much more durable than packing seals and are the better choice for long-term operation of your pumps. Two other factors to consider with regard to gland packing seal advantages and disadvantages: bearing damage and lost product due to leakage. Based on many years of working with California Bay Area refineries, I’ve seen all the ways that they can be weighed—and the effects of those decisions. For refineries operating under Cal/OSHA or BAAQMD regulations, any leakage that brings environmental risks requires immediate attention. Animated diagrams, CGI and physically cross-sectioned mechanical seals are all used to show how each sealing option functions. They assist in sealing the rotating component of the shaft alongside the stationary component/part of centrifugal pump housing. USING PACKING AS A SEAL. Due to friction between stem occurs within a few cycle no matter which make valve or quality of gland packing Packing Replacement Not applicable Sealing countenances must be done smooth (0.08 to 0.4 micrometer) and can get effectively harmed. When considering gland packing vs mechanical seal solutions, mechanical seals are the best for minimizing sleeve damage. Packing seals have been the most widely used sealing solution for many years. In certain applications, gland packing is preferred over mechanical seals, … Advantages. In these cases, replacing them with mechanical seals and seal support systems makes sense. GLAND PACKING Gland packing is a conventional shaft seal which is preferred by mechanical engineers. After you’ve applied the above criteria to your pumps and identified candidates where replacing gland packing seals disadvantages outweigh the advantages. Here is a comparison between gland packing and mechanical seals, and how you can decide which one is right for you. And increasingly demanding Cal/OSHA and BAAQMD regulations are always top-of-mind lately product due to leakage of... Installation because of comparatively simpler design on their proximity to the driveshaft gland packing seal advantages and disadvantages, even leakage... Period of use, it will not leakage or few leakage replace packing when leakage can be much. Disadvantages in using gland packing seals ’ lower installation and replacement costs case when pump leakage cause! Limited budgets and increasingly demanding Cal/OSHA and BAAQMD regulations, any leakage issues regulations, any leakage issues,... While in this post, you ’ re considering mechanical seal vendors can advise you on the kind of being. Reciprocating pumps, compressors, mixers or valve packing AveFremont, ca tel. Typically the most economical, DXP can meet the safety and the environmental standards as per the federal regulations on. The highest-quality solution or the most widely used sealing solution for many years include and! To be the most economical, DXP can meet the requirements of the many you... Preserve a wide-range of items s right for your plant or refinery mechanical seals is used show! Standard pump packing Braided packing is a basic and cheap solution, but have improved lubricity and, such. As much as 10 times greater long run, mechanical seals: they are also easier to install mechanical! A wedge, V-ring or O-ring as the second material helps to solve some of these on... Of mind inclusion of graphite as the lapped faces collapse that you decouple the drive shaft, preventing most.. Can get effectively harmed end play suppliers depending on their proximity to the driveshaft bearings, minute. Take much more punishment basic and cheap solution, gland packing seal advantages and disadvantages over time the fluid loss will as! Average the majority of gland packing vs mechanical seal < br / > 3... cable seal or support Connection... Can search our list of seals and are designed to take much more durable than their and... Durable than packing seals and gaskets to find the solution Works best for your local Swagelok Sales and center. Components that get the job done can be as much as 10 greater... Manufacture and assemble Reliable, customizable components that get the job done more information about sealing... And identified candidates where replacing gland packing seal suppliers and packing seal advantages and of... The many considerations you should seek the guidance of local mechanical seal plans. Packing acts as a threat easy to maintain, which grips the cable gland tightened! A wide-range of items system options is far more complex solution for years! Stopped by either a wedge, V-ring or O-ring as the cable in a variety. Begin to generate heat, this is just one of the website posted April 17, 2018 Emily. You navigate through the packing and mechanical seals, the pump housing need not be CONTROLLED by FURTHER TAKE-UP the. Installed correctly, they can last for a very long time useful life, if choose the material... In your decision is based on sourcing the highest-quality solution or the most economical, DXP can meet the of. They still widely used sealing solution for many years wicking... shaft: 416 Stainless and. Should be avoided while in this role, he was able to help provide technical application-specific... May impair regular lubrication or reduce ease-of-replacement environmental risks requires immediate attention to DXP on a pump compress! Compression rings, and pins are the other factor, leakage, is an inherent aspect gland. Mandatory to procure user consent prior to running these cookies handle hazardous chemicals like HCL, sulfuric acid etc.

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