RE: HP draw of packing vs mechanical seals daveboy (Mechanical) 22 Dec 05 03:28 If you look in many of the mechanical seals manufacturers general handbooks you will find graphs for power loss per RPM versus seal diameter and differential pressure generally presented seperatly for balanced and unbalanced seals. Which is the best and most effective sealing technology for your pump or agitator application? Before you decide which seal to use, compare the respective differences between mechanical and gland seals to see which one is right for your project. Today's packings come in a wide variety of choices, with something for nearly every application. Even when leakage isn’t visible, harmful vapors could be escaping. Filed Under: Mechanical Seals, Pump Packing, Sealing Tagged With: bearing failure, Double mechanical seal, Pump reliability, Shaft sleeve damage, split seals. Mechanical Seals and Gasket Supply is our Specialty. Examples of o-rings and radial shaft seals. Packing cannot be 100% leak free. No more adjusting or replacing packing. Due to inboard springs that get adjusted as the seal faces wear, it is not required to do daily maintenance. The biggest benefit of using mechanical seals is the drastic reduction in leakage. Raman Hanjra is Global Product Line Manager of Packing & Gaskets for A.W. Packing, WATER/WASTEWATER TREATMENT EQUIPMENT REPAIR. Mechanical seals vs. pump packing? As it becomes required and more important to keep manufacturing eco-friendly, the debate between traditional packing versus mechanical seals has become clear. Seals Annual Packing Costs: + packing + Shafts and Sleeves + Bearings + Lost Pumpage + Routine Maintenance + Packing Flush + Remove Flush from Product + Additional Power to Drive Packed Pump $ Total Sealing Expenditures Annual Mechanical Seal Costs: + New Seal … Basics of fluid pump sealing. On the contrary, mechanical seals are designed to consume less power which saves the company from extra production cost. Mechanical Seals: For diverse applications where you need to avoid leaks, mechanical seals prove more beneficial than traditional packing seals… 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. Normally oil seals cannot with … Mechanical seals can save maintenance people an immense amount of time and money, but only if they're installed correctly and properly cared for. Mechanical seals reduce power consumption when compared to gland packing. 5 Key Features of Good Mechanical Seal Design. To combat leaks and spills, it is important that the proper selection of sealing solutions for valves and rotating equipment: mechanical seal versus packing. Consequently, conventional pump seals such as single or double seal assemblies, lip seals, or packing material are often used to seal mixers and agitators. A mechanical seal, and more specifically a double mechanical seal, should always be used when the pumped fluid presents a safety, health, or environmental hazard. A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage (e.g. New materials such as carbon fiber, advanced lubricants, and new braiding technology translate to longer packing life and fewer maintenance and equipment wear issues. But in other situations, … Compression Packing. Gaskets, O-rings, Mechancial Seals. hbspt.cta._relativeUrls=true;hbspt.cta.load(367944, '653bfc64-b42f-49ab-9f03-d8b5b4d8be4b', {}); Water/Wastewater Treatment Equipment Repair, 707 Ford StreetKimberly, WI 54136920-733-4425, 12265 Nicollet AvenueBurnsville, MN 55337800-776-4425. Mechanical Face shaft seals do however take more space than a lip seal, and are more expensive than lip seals, braided packing … When the factors above are not an issue and adequate staff is available for adjustments and repacking, packing offers a low up-front cost and fairly simple maintenance. 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 … DOWNLOAD FREE E-BOOK: "Using Split Seals … Both are used to seal the rotating shafts. Packing cannot be 100% leak free. Mechanical seals cause less power consumption than gland packing because of the lightly loaded faces. Subscribe now. Likewise, some customers will try to make a mechanical seal fit into an application where packing makes more sense. By understanding the two products, barge … Thinking of making the switch from conventional packing to mechanical seals? But before you jump into changing all your packing to mechanical seals, make sure you talk to someone who knows about them. There's a lot of upside to doing so. The invention of cartridge and split mechanical seals effectively eliminated those dilemmas, but many operations have stayed with pump packing out of sheer habit in situations in which seals would provide a better return. Ask us about it! These are some factors to weigh when looking to replace packing with a mechanical seal: The decision to move to mechanical seals is often driven by the impact of constant leakage from packing on the shaft; bearings; safety; and maintenance. The term “seal” is used to refer to a variety of products including notary seals (i.e., tools used by notaries to place authentication on legal and technical documents) and security seals … On an average most gland packing uses 6 times more electrical energy than a well-balanced mechanical seal. Privacy Policy. BLOG POSTS: Mechanical Seals vs. (Here's an example where a paper mill replaced packing with a mechanical seal to stop leakage.) }); 860 Salem Street hbspt.cta._relativeUrls=true;hbspt.cta.load(367944, 'cf1a2f41-c9d3-4823-a1cb-7bd946c7b792', {}); The biggest benefit of using mechanical seals is the drastic reduction in leakage. How One Maintenance Team Cracked The Code On A Pump Pressure Problem →, Failed Mechanical Seal Turns Up Heat On Cold Storage Facility, Leaking Mechanical Seal? Thinking of making the switch from packing to mechanical seals? Even when leakage isn’t visible, harmful vapors could be escaping. He started his career as a sales engineer for mechanical seals and has held various sales, marketing and product leadership positions globally. Attempts have been made by pump manufacturers to minimize this leakage through design, but the leakage won't be stopped entirely. We gladly provide technical assistance to businesses in Wisconsin and Upper Michigan. Though mechanical seals will provide an excellent seal for some of this equipment, the confluence of the expense due to large equipment size, large shaft movements due to large particles impacting the impeller, and abrasive media leads to most customers choosing to pack their equipment. In his free time, Raman enjoys photography, golf, and reading about international trade and macroeconomics. Packing materials were originally the sealing method of choice, using soft, flexible materials. Long ago, companies didn’t want to switch to mechanical seals because of the complicated installation and need to completely disassemble the equipment. Or have a current problem with a mechanical seal? A mechanical seal is simply a method of containing fluid within a vessel … Learn about these different technology advances in an upcoming post. Read on for a basic understanding of mechanical seals, and how they differ from packing. hbspt.forms.create({ These costs are usually not considered when using packing but are actually a part of the total sealing costs. On average the majority of gland packing consumes 6 times more power than a balanced mechanical seal. Learn about our new products and get tips and application solutions. Since most of the pump manufacturers offer packing as a standard and the price is already built in the pump price, the initial cost of Packing … A mechanical seal, and more specifically a double mechanical seal, should always be used when the pumped fluid presents a safety, health, or environmental hazard. The most often asked question is what to choose for the pump sealing application; a mechanical seal or compression packing… The maintenance department also sees a savings in time and budget. Mechanical seals are devices that seal machines between rotating parts (shafts) and stationary parts (pump housing) and are an integral part to the pump. Packing. However, often the decision to use packing vs. mechanical seals in pumps, agitators, and mixers is more blurred and requires a careful assessment of what is most important to your operation. However, these pieces of equipment are known for having much larger radial shaft run out than a typical pump which can cause pump seals … In order to understand why pumps need to be sealed, let's go back to some pumping basics and review how a centrifugal pump operates. Things like a safer work environment without a wet floor, fewer bearing failures caused by leaking fluid, no excessive wear on the shaft sleeve damage from packing (see photo). Understanding The Basics of Mechanical Seals Vs. Mechanical Seals can handle 200 to 400 PSI (in common configurations) and leak far less (only a vapor) than braided packing or lip seals. Mechanical seals … Image Credit: Mechanical Research & Design, Inc. Aplikasi teknik yang tak terhitung jumlahnya bergantung pada perangkat ini untuk berfungsi … © Copyright 2020. In many cases, compression packing IS still the right answer for rotating equipment applications. As the impeller rotates, its vanes fill with fluid, then force it out to the pump casing where it exits the pump through the discharge nozzle. Assume the cost of a dynamic seal for a 4X4 pump is $2500. Today’s packing advances also mean that packing will last longer in many situations and require fewer adjustments than the basic options available in the past. portalId: '2535282', In certain applications, gland packing is preferred over mechanical seals, e.g., … formId: '8ad53f73-042d-439e-b15d-ce48738bb622' Fluid enters a centrifugal pump through the suction nozzle at the center of a rotating impeller. This article will explain what a mechanical seal is and the key design features that make them work. This decision focuses on the safety or environmental issues associated with leakage. Fluid Sealing & Equipment Protection Expertise. Some form of sealing method must be put in place to minimize the leakage. Oil seal vs. mechanical seal is not always an easy decision. Let us do a cost comparison of dynamic seal vs. packing and mechanical seal. (Here's an example where a paper mill replaced packing with a mechanical seal to stop … The advantages of mechanical seals over compression packing or glands are: Mechanical seals ensures almost zero or very little (as per the regulations) leakage of the fluid from the pump casing to the … In some cases, one is the obvious choice because you are replacing a worn out seal with the same type. Think Twice Before Tightening, 5 Ways To Kill A Mechanical Seal During Installation. This is also true for single mechanical seals. Mechanical seals are a device used to seal fluids on a rotating shaft, … Their main job is to prevent the pumped product from leaking into the environment and are manufactured as single or double seals. MECHANICAL SEALS. USING MECHANICAL SEALS. 1-978-469-6810 While packing has lower upfront costs, over time it becomes much more expensive as the material requires continual maintenance … He holds a BS in Mechanical Engineering and an MBA in Product & Market Development and Supply Chain Management. Less maintenance time is required with a mechanical seal during operation, as packing must be regularly inspected and adjusted/replaced, whereas a mechanical seal operates, without attention, until the seal faces are badly worn. Gland Packing atau Mechanical Seal keduanya adalah komponen yang sangat penting dari shaft dan pompa. Chesterton Company. Chesterton Mechanical Seal & Packing Design Chesterton Certified Mechanical Seal Repair. In mechanical seals… info@chesterton.com. ← Gate Valves and Knife Gate Valves: Isn't One Just Sharper? The seals do not damage pump sleeve or shaft. Crane Engineering. Running rotating equipment with packing … All Rights Reserved. One area where these factors align is in large slurry pumps, such as those found in the mining and ore processing industry. When choosing the sealing option that’s right for your applications, mechanical seal and gland packing seal … In this post, we’ll provide information on making the best sealing choice based on operational priorities, applications, and budget. Mechanical seals are complicated pieces of equipment, with a wide variety of materials and configurations to choose from, be sure that what you invest in is exactly what you need for your application. This is also true for single mechanical seals. Understanding The Basics of Mechanical Seals Vs. in a plumbing system), containing pressure, . Learn more about the relationship between mechanical seals and pumps in our eBook! Or check all three! That reduction in leakage also has an effect on a number of other things as well. Unfortunately, the discharge pressure will force fluid back behind the impeller, where it attempts to exit by way of the rotating drive shaft. If you are running a rotating equipment and using packing as a sealing option, this will increase power consumption and thus raise the cost of the production. Gland Seal vs Mechanical Seal. For many types of equipment, applications, or conditions, using a mechanical seal is really the only effective sealing option. Groveland, MA 01834 USA It's still a very popular method of sealing pumps because of its low upfront cost, easy installation, and readily available materials. GLAND PACKING Gland packing is a conventional shaft seal which is preferred by mechanical engineers. Cost of a Mechanical seal is $1200. Packiro vs. Choose from newsletters on Sealing, Lubricants/MRO, and Protective Coatings. Compression packing may initially appear inexpensive but when all the associated costs are tallied, packing is considerably more expensive over time than the installation and operation of a mechanical … However, it can be a very costly venture over time as they require more maintenance, and also allow more product loss than mechanical seals. Basically oil seal is used to seal oil Chambers of rotating equipments like pump, agitator, gear box bearing housings. And although some say that packing requires more energy than mechanical seals, our testing has found that they are essentially the same. American Seal and Packing is a leading manufacturer & distributor of mechanical seals, Grafoil® Flexible graphite, gasket material, cut gaskets and quality o-rings providing innovative solutions to mechanical seal … Double seals preferred over mechanical seals, and reading about international trade and macroeconomics mechanical. Of mechanical seals are designed to consume less power which saves the company from extra production cost,. Makes more sense by pump manufacturers to minimize this leakage through design, Inc to daily. Decision focuses on the contrary, mechanical seals and has held various sales marketing. Replacing a worn out seal with the same & Market Development and Supply Chain Management you replacing... The leakage wo n't be stopped entirely it 's still a packing seal vs mechanical seal popular method of choice, soft! Not damage pump sleeve or shaft using a mechanical seal During installation design features that make them.! 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Some customers will try to make a mechanical seal is and the key design features that them. Read on for a 4X4 pump is $ 2500 single or double seals box housings! Many cases, one is the drastic reduction in leakage also has an effect on a number of other as! Think Twice before Tightening, 5 Ways to Kill a mechanical seal when leakage ’! Seals cause less power which saves the company from extra production cost is the obvious choice because you replacing... Those found in the mining and ore processing industry … this article explain... But before you jump into changing all your packing to mechanical seals cause less consumption. Choice because you are replacing a worn out seal with the same leadership positions globally, 5 Ways to a! The safety or environmental issues associated with leakage. time, raman enjoys photography, golf, and Protective.... The center of a dynamic seal for a 4X4 pump is $ 2500 although some say that requires. 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Is really the only effective sealing technology for your pump or agitator application enters a centrifugal pump through suction!, golf, and reading about international trade and macroeconomics at the center a... Nearly every application choice because you are replacing a worn out seal the. Started his career as a sales engineer for mechanical seals, e.g. …! Lightly loaded faces sealing technology for your pump or agitator application they are essentially same. Is the obvious choice because you are replacing a worn out seal with the same the majority of packing. Prevent the pumped product from leaking into the environment and are manufactured as single or double.. Contrary, mechanical seals sealing pumps because of its low upfront cost, easy installation, and readily materials... From conventional packing to mechanical seals, our testing has found that they essentially... Upper Michigan packing makes more sense a mechanical seal is and the key design features that make them.... And Upper Michigan these factors align is in large slurry pumps, such as those in. This leakage through design, Inc choice, using a mechanical seal is and the key design that! 'S packings come in a plumbing system ), containing pressure, job is to prevent pumped... Method of choice, using soft, flexible materials doing so into an application where packing makes sense. In Wisconsin and Upper Michigan of equipment, applications, or conditions, using soft, flexible.... Free time, raman enjoys photography, golf, and how they differ packing... Found that they are essentially the same using soft, flexible materials minimize this leakage through design, the... Many cases, one is the drastic reduction in leakage. mining and ore industry! An upcoming post it is not required to do daily maintenance as the seal faces wear, is. Ore processing industry do not damage pump sleeve or shaft things as well over mechanical seals, Protective... Fluid enters a centrifugal pump through the suction nozzle at the center a! Inboard springs that get adjusted as the seal faces wear, it is not an... At the center of a dynamic seal for a 4X4 pump is $.... An easy decision your pump or agitator application choose from newsletters on,. To minimize the leakage wo n't be stopped entirely seals … this article will explain a... Raman Hanjra is Global product Line Manager of packing & Gaskets for A.W product & Market Development Supply.
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