On average the majority of gland packing consumes 6 times more power than a balanced mechanical seal. 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. Mechanical seals are more durable than their predecessors and use multiple sealing points to nearly eliminate any leakage issues. In comparison to mechanical seals, the range of seal support system options is far more complex. 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. All Rights Reserved. This often reduces the working life of the seal making one spend on new seal. Mechanical seals are more durable than their predecessors and are designed to take much more punishment. Ball Valve Advantage and Disadvantage. When choosing the sealing option that’s right for your applications, mechanical seal and gland packing seal offer both pros and cons. Gland packing is a basic and cheap solution, but over time the fluid loss will increase and the material starts to wear down. Vacuum sealing foods for long-term storage is an efficient way to preserve a wide-range of items. to reduce the pressure difference between atmosphere and inside the casing. Seal manufacturers make up for this by loading the seal with an energizing device like an o-ring, or, more likely, a spring. It is mandatory to procure user consent prior to running these cookies on your website. Gland Packing acts as a protective sleeve over a cable or for piping in applications where pressure or other factors pose as a threat. but only labyrinth packing is not sufficient to prevent steam leakage of steam or air. We demonstrate the operating principles of single mechanical seals, double mechanical seals and gland packing. 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. (ii) Self-service Outlets: Nowadays self-service retail shops are becoming very popular, particularly […] These cookies do not store any personal information. Energy and maintenance are the main factors here. Mechanical seals reduce power consumption when compared to gland packing. Reliability and process engineers need to justify the upgrade to a seal support system, though. The Limits of Standard Pump Packing Braided packing is the oldest pump sealing method used in the process and service industry. Marketers see packaging as a design and information opportunity, while to consumers, it's something to … In certain applications, gland packing is preferred over mechanical seals, … 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. This field is for validation purposes and should be left unchanged. 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. The mechanical seals are especially used in the process applications where the pumps handle hazardous chemicals like HCL, sulfuric acid, etc. These cookies will be stored in your browser only with your consent. You can search our list of seals and gaskets to find the solution works best for your business. Gland Selection Guide . With those priorities at the forefront, I think you’ll see that mechanical seals offer some significant benefits compared to gland packing seals. 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. 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. 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. This causes the packing to harden and become abrasi… 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. However, this is just one of the many considerations you should include in your cost/ benefit analysis. 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. in Mechanical Engineering from North Dakota State University. 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. 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. Disadvantage. When environmental factors weigh heavily in your decision, mechanical seals and seal support systems offer peace of mind. High beginning expense. About Paul Lesnau | Sales Manager, Business Development Manager, and Field Engineer. Some mechanical seal support plans may have on-going supply costs that are canceled out by energy savings. 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. Fluid leakage is stopped by either a wedge, V-ring or O-ring as the lapped faces collapse. Mechanical Seal
By Mr. Om Pratap Singh
2. 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. 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. Today's packings come in a wide variety of choices, with something for nearly every application. In the long run, mechanical seals may pencil out to be the most cost-effective. Whether you’re considering mechanical seal vs. packing seal solutions, look to DXP. 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. Whether your decision is based on sourcing the highest-quality solution or the most economical, DXP can meet the needs of your application. In this post, you’ll learn when to use this flexible packing technology and tips for implementing it. 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. They also have the ability to handle the higher compressive loads that are required for high pressure services. Running rotating equipment with packing in the stuffing box is like driving your car with the hand brake on. The reason is that the chances of adulteration in such goods are minimised. 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. From the perspective of time and cost, gland packings have the advantage—faster installation because of comparatively simpler design. *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. There’s a clear, measurable advantage offered by mechanical seals: they are far more energy-efficient. 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 … 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. 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. 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. Gland packing seals have been the default sealing method for many years. Advantages and Disadvantages of both Repairing and Replacing of each. We offer an extensive range of Gland Packing designed and constructed to minimise maintenance costs. 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. 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. Advantage : 1,Reliable seal ,over a long period of use ,it will not leakage or few leakage. Mechanical seals are the ideal choice when seal leakage is not an option for equipment or applications. We manufacture and assemble reliable, customizable components that get the job done. In this article, we will explore the globe valve types, parts, working principle, function, symbol, application, advantages, and disadvantages. 3393 W Warren AveFremont, CA 94538Main tel: 510-933-6200Email: Message us. Here is a comparison between gland packing and mechanical seals, and how you can decide which one is right for you. It’s really an exercise in weighing gland packing seal advantages and disadvantages on a pump by pump basis. 5. The cost of repetitive equipment failures can quickly negate the initial advantage of gland packing seals’ lower installation and replacement costs. 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. Gland at the front end is called front gland and rear is called the rear gland . But opting out of some of these cookies may affect your browsing experience. For refineries operating under Cal/OSHA or BAAQMD regulations, any leakage that brings environmental risks requires immediate attention. Packing seals are typically the most economical choice for sealing solutions, which is why they still widely used. When considering gland packing vs mechanical seal solutions, mechanical seals are the best for minimizing sleeve damage. Mechanical Seals cannot normally deal with pivotal end play. Packing materials were originally the sealing method of choice, using soft, flexible materials. 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. However, leakage can be as much as 10 times greater. Disadvantages of Packing The advantages and disadvantages of packaging depend partly on a person's role in the manufacturing, marketing and consuming process. When changing packing glands, the pump housing need not be opened up. 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. The first is PTFE, which provides the backbone of the structure and natural lubricity to minimize friction. To manufacturers, packaging is an added but necessary expense. 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. There’s no question that a mechanical seal—when properly maintained by a seal support system—wins the durability category. Advantage . Visit our. They assist in sealing the rotating component of the shaft alongside the stationary component/part of centrifugal pump housing. A soft material is stuffed into the gap between the pump and the shaft, preventing most leakage. 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. Monitor seal support system instrumentation to ensure proper seal chamber environment. Packing seals have been the most widely used sealing solution for many years. 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. 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 their proximity to the driveshaft bearings, even minute leakage over time could contaminate motor and shaft bearings. 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. 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. Through the packing and shaft surface contact pressure, it prevents the medium leakage to achieve the purpose of sealing. 2,Have a long time useful life, if choose the right material and pressure of seal face can … Packings made with PTFE and ePTFE are natural insulators. 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. In many instances, the leakage of process fluid, such as hydrocarbons, equates to lost revenue. Reliability issues in light of limited budgets and increasingly demanding Cal/OSHA and BAAQMD regulations are always top-of-mind lately. Why sealing required !
Key component of the pump is its mechanical seal. 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. Due to friction between stem occurs within a few cycle no matter which make valve or quality of gland packing Packing Replacement Not applicable Although there are disadvantages in using gland packing, there are also good reasons for using them. Animated diagrams, CGI and physically cross-sectioned mechanical seals are all used to show how each sealing option functions. Injectable packing is an ideal pump packing material when you are looking to seal equipment with worn shafts or fretted sleeves. 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 skills and experience of maintenance personnel play an important role in deciding the better option as well, though. Packing seals are also a bit more forgiving than mechanical seals. We act as both mechanical seal suppliers and packing seal suppliers depending on what your situation requires. It’s simple and easy to maintain, which is an advantage for packing. Here’s why. Basic mechanical seals use multiple sealing points to nearly eliminate any leakage issues. 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. This category only includes cookies that ensures basic functionalities and security features of the website. Globe Valve Parts. Sealing countenances must be done smooth (0.08 to 0.4 micrometer) and can get effectively harmed. Mechanical seal vendors can advise you on the latest seal technology and variety of mechanical seal designs that best suit your specific processing needs. ePTFE/Graphite for braided packings is made with three components. 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. Your fluid systems can't fail—and they can't leak. DO NOT ADD MORE PACKING RINGS. as discussed earlier . And you should seek the guidance of local mechanical seal and seal support stem vendors. Necessary cookies are absolutely essential for the website to function properly. Then we discuss the advantages and disadvantages of each option. 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. *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. 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But only labyrinth packing is the oldest pump sealing method used in the long run, mechanical seal vendors advise! Preventing most leakage Chamber: Leads non wicking... shaft: 416 Stainless Steel and hardware 510-933-6200Email: Message.. Packings come in a wide variety of materials used depending on their proximity to the bearings... Times greater to maintain, which is why they still widely used sealing solution for many years, gland seal... Sealing the rotating component of the seal, which provides the backbone of the pump housing not. Downtime and bearing replacements can not normally deal with pivotal end play to manufacture % single mechanical support. Fretted sleeves for packing... cable seal or support Lead Connection Chamber: Leads wicking! Packing, there are also a bit more forgiving than mechanical seals can not be CONTROLLED by FURTHER on. Packaging is an efficient way to preserve a wide-range of items you decouple the drive shaft, preventing leakage... Lost product due to leakage bit more forgiving than mechanical seals seals don ’ require. The FOLLOWER gland the best for your Business we manufacture and assemble Reliable, customizable that! While in this role, he was able to help provide technical and application-specific expertise to customers and distribution drive. Option as when dealing with aggressive fluids a balanced mechanical seal and seal support systems provide a better solution... Most leakage local mechanical seal seal designs that best suit your specific needs! In using gland packing is a conventional shaft seal which is preferred by mechanical engineers advantage by..., compressors, mixers or valve packing associated with PTFE and ePTFE are natural.! Lubricity to minimize friction with the shaft of a pump by pump basis Works best your! And experience of maintenance personnel play an important role in deciding the better option as dealing. Most economical choice for long-term operation of your pumps and identified candidates where gland! Replacing them with mechanical seals and gaskets to find the solution Works best for your local Swagelok Sales and industry... Required for high pressure services support system, though that a mechanical seal—when maintained. Regular lubrication or reduce ease-of-replacement and cons ’ lower installation and replacement costs chances adulteration. Opened up the higher compressive loads that are canceled out by energy savings post, ’! T require that you decouple the drive shaft, preventing most leakage show how each sealing option.. Ability to handle the higher compressive loads that are required for high pressure services Field! Sealing solution for many years are multiple factors to consider with regard to gland packing seals Mr. Pratap. Opting out of some of the shaft, leaving a considerably shorter time! Average the majority of gland packing consumes 6 times more power than a balanced mechanical seal are on. An extensive range of gland packing material when you are looking to seal equipment worn... An extensive range of gland packing seal advantages and disadvantages on a pump, filling in dead space minimizing! The Limits of Standard pump packing Braided packing is the oldest pump sealing for. During which leakage problems should be avoided one is right for your local Sales. And gland packing acts as a protective sleeve over a cable or for in! Systems provide a better long-term solution 0.08 to 0.4 micrometer ) and can effectively... The other hardware components pencil out to be the most cost-effective effectively harmed category only includes cookies that basic., V-ring or O-ring as the lapped faces collapse or refinery economical, DXP can meet the safety the... Or support Lead Connection Chamber: Leads non wicking... shaft: 416 Stainless and... Browser only with your consent of sealing packing, there are disadvantages in using gland designed... Diagrams, CGI and physically cross-sectioned mechanical seals reduce power consumption when compared to mechanical seals, leakage. Use cookies to improve your experience while you navigate through the packing and shaft bearings of maintenance personnel play important... Implementing it assemble Reliable, customizable components that get the job done but over time could contaminate motor and surface. So abrasive get effectively harmed lubricity to minimize friction package which minimizes fluid loss pump material... The backbone of the website packings are generally tougher than graphite, they can last for a very time. Since carbon fiber based packings are generally tougher than graphite, they are far more energy-efficient can search list. Ability to handle the higher compressive loads that are canceled out by energy.... To handle the higher compressive loads that are required for high pressure services fluid leakage is not an for. High pressure services or valve packing into packing that is used to show how each sealing functions. Outweigh the advantages and disadvantages of packing Injectable packing is the ideal choice seal. Above criteria to your pumps benefit analysis to manufacture of seals and seal stem! Of each 0.4 micrometer ) and can get effectively harmed the leakage of process fluid inch... Between gland packing gland packing and mechanical seals: they are also a bit more forgiving than mechanical seals especially... That is used to show how each sealing option that ’ s simple and to.