Integral internal recirculation is from pump discharge. The seal ring which rotates with the shaft is called the rotary ring. Remark the configurations listed for each individual piping plan are to be understood as recommendations including possible utilizations which may also be applied. Selecting a seal flush piping plan for your single mechanical. In this arrangement the drain is located at the bottom of the outer seal gland and is routed to a reservoir.
Mechanical seal products and services catalog flowserve. John crane api plans poster free download as pdf file. Most common plans and sealing systems plan 53b plan 53c plan 52 used where the pumped product is harmful hazardous and or buffer fluid may not contaminate the product. Typically, a small tube connected to either the suction or the discharge of the pump will help circulate the liquid. Do not exces sively compress the seal before or during installation. 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. Causes of seal failure piping plans sealinggg water usage safeunit flowmeters.
John crane is the acknowledged leader in the design and manufactureof engineered seal. The total length of connection piping between the mechanical seal and the auxiliary system should not exceed 5m 16. External reservoir at pressure below seal chamber pressure providing buffer liquid forced circulation. The most popular piping plans are shown below for your reference. These are standardized flushing piping arrangements that are widely used in the industry.
Seal accessories can be defined as any piece of hardware which is required to support the mechanical seal or the seal piping plan. This comprehensive international standard for mechanical seal and system use has many important changes. Mechanical seal piping planspocket guide 4th edition note. Mechanical seal piping plans john crane books mechanical seal piping plans john crane eventually, you will extremely discover a supplementary experience and success by spending more cash. Selecting a seal flush piping plan for your single. Take particular care to avoid damage to lapped sealing faces and flexible sealing rings. Plan 54 pressurized external barrier fluid system supplying clean liquid for an arrangement 3 pressurized dual seal. In order to maximise reliability and minimise safety risks, it is strongly recommended that used seals are returned to john crane for rebuilding to asnew specification essential for noncontacting gas seals. However, piping plans are so important that having a dedicated menu seems more appropriate. The complete cross reference for mechanical face seal replacement how to use this catalogue locate the manufacturer of the equipment. Mechanical seals are usually endface seals or rotatingface seals, but in some designs they can be circumferential or even a hybrid of liptype seals. What are the best practices for ensuring the reliability of api piping plan 53b.
Mechanical seal basics and seal selection process training. Plan 53 is the most commonly used auxiliary system for the operation of dual pressurized mechanical seals. Customer specific variants of these plans are possible. And, if you are new to mechanical seals and are considering making the switch from packing to the mechanical seal, read more about it on our blog, understanding the basics of. Please contact aesseal systems division for further details. This reference book provides a concise summary of the most essential piping plans. This controls the fluids temperature and lubricating properties. Api 682 has historically defined design characteristics of accessories and, over time, these have increased in scope to cover more accessories. Describes all sealing plans in most simplified manner. Piping plans help keep mechanical seals running cool and clean, promote safe handling of dangerous fluids, and extend the operational availability of rotating equipment. Mechanical seal piping plans single seals dual seals. For over 80 years john crane has been redefining the limit of seal support technology. Possible plan 99 engineered piping plan not defined by other existing plans. See john crane technical report trp1114eng for additional information.
These include such items as an orifice, seal cooler, or seal barrier fluid reservoir. All books are in clear copy here, and all files are secure so dont worry about it. Mechanical seal piping plans webinar session 3 siewert. Ky type 21, john crane type 21, elastomer bellow shaft seals. John crane mechanical seals and seatsmating rings are precision prod ucts and must be handled appropriately. Mechanical seal piping plans single seals plans 01, 02, 03, 11, 14, 21, 23. Api has established standardized piping plans for seals that provide industry guidelines for various seal arrangements, fluids and control. Read online download mechanical seal piping plans john crane pdf book pdf free download link book now.
See john crane technical report trp1114eng for additional. Standard flush plans for mechanical seal plan 01 see figure 1. Since the rotating seal will create heat from friction, this heat will need to be removed from the seal chamber or else the seal will overheat and fail. The api plans elaborated in this section are as defined by api 682 3rd edition api 610 10th edition. John crane is an american company, now a subsidiary of smiths group and provider of engineered products and services including mechanical seals, couplings, seal support systems, filtration systems and artificial lift. John crane api plans poster heat exchanger pump scribd. Causes of seal failure piping plans sealinggg water usage. Seal arrangementspart three gordon buck and ralph gabriel, john crane. Download download mechanical seal piping plans john crane pdf book pdf free download link or read online here in pdf. The best way to ensure that your mechanical seal is performs at its best, is to select the seal properly and have the appropriate flush plan to support it.
These are standardized flushing piping arrangements that are widely used in the. Join us at the harleydavidson museum in milwaukee for a day packed with educational sessions, live demonstrations, and a end of day speaker you just cant miss. Alternatively ask for john crane service personnel to visit site. Since seal piping plans were developed, maintained and revised by the api, it would seem appropriate to include piping plans under the api 682 menu. Plan 32 injection of clean fluid into the seal chamber from an external source. John crane type 21, ky type 21, elastomer bellow shaft seals. Mechanical seal piping plans flowserve corporation. These reservoirbased seal support systems are designed for both api plan 52. This reference book provides a concise summary of the most essential piping plans used successfully in todays process plants. Just like you may want a clean desk and a comfy chair, mechanical seals appreciate good working environments too. A mechanical seal must always be serviced after removal from the machine.
Api piping plans help to ensure good conditions for mechanical seal operation as well as improving safety and pump reliability. Common types of dual seals are addressed in another article. Providing unrivaled expertise, innovation and reliability, john crane lemco is the solution. John crane lemco is your complete source for mechanical seal supportsystems. Plan 75 is intended for use when the leakage will be mostly in a liquid form. A few simple principles can guide you to the best seal flush plan for your installed mechanical seal, allowing the seal to operate in an environment that generates optimal seal life yet minimizes costs from water usage and product dilution. Mechanical seal piping plans john crane ebooks mechanical seal piping plans john crane eventually, you will totally discover a other experience and achievement by spending more cash. Sealing systems for pumpssealing systems for pumps. Common types of pumps mechanical seal piping plans single.
As seal technology has advanced, the standard has expanded to incorporate new seal designs, materials, seal selection guidance, and piping plans. Mechanical seal piping plan booklet john crane collateral. Nov 06, 2012 mechanical seals piping plans api 628 1. This is an internal recirculation from the pump discharge into the seal. Mechanical seal piping plans piping key orifice block valve. Disassemble john crane seal on alfa laval agitator duration. Api has established standardized piping plans for seals that provide industry. As you work with your local seal supplier, remember that a mechanical seal recommendation is not complete without a seal support plan, such as a seal flush piping plan. The mechanical seal division of the fsa is one of six with a speci. For nonoptimum conditions, piping plans provide a means of adjusting the seal environment. Jul 08, 2014 a few simple principles can guide you to the best seal flush plan for your installed mechanical seal, allowing the seal to operate in an environment that generates optimal seal life yet minimizes costs from water usage and product dilution. These instructions and other seal information can be found at.
The seal flush plan is as equally critical and perhaps more so to help establish a reliable operating mechanical seal. Api 682 arrangement 2 configurations considerations for. Today, well identify 4 flush piping plans for single mechanical seals and how they work. Mechanical seal piping plans single seals plans 01, 02, 11, 14, 21, 23, 31, 32, 41 dual seals plans 52, 53 a, 53 b, 53 c. Used for applications where products have high pressure and are. A flush plan is a strategic equipment arrangement that circulates fluid to. Most common types of pump seal piping plans for single seals are discussed in following paragraphs. Deadended seal chamber with recirculation from seal chamber no flush.
If the seal is set up with a distributed or extended flush, the effectiveness of the system will be improved. Mechanical seal piping plans john crane 11 pdf drive search and download pdf files for free. Apr 24, 2011 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. Different types of pumps mechanical seal piping plans are detailed in api 682 or iso 21049 standards. The seal is designed exclusively for sealing rotating shafts. Search in john crane catalogs and technical brochures on directindustry and find the information you need in 1 click. Download mechanical seal piping plans john crane pdf pdf. John crane type 6 sealol type a pac seal type 16 john crane type 6a sealol type b pac seal type 68 john crane.
To check out mechanical seal flushing arrangements and piping plans, i have consistently found this to be the most useful. Mechanical seal piping plans john crane loyola academy. The 4th edition of api 682 provides specifications for piping plans such as the one shown here, plan 53c. John crane is an american company, now a subsidiary of smiths group and provider of engineered products and services including mechanical seals, couplings, seal. We make the world safer, healthier and more efficient. In the interest of continuous development, john crane companies reserve the right to alter designs and specifications without prior notice. Houston, tx, usa brian kalfrin is a regional engineer with john crane in pasadena texas with over 14 years of experience with mechanical seals and related systems.
John crane is an american company, now a subsidiary of smiths group and provider of engineered products and services including mechanical seals, couplings, hydrodynamic bearings, seal support systems, filtration systems and artificial lift. Scribd is the worlds largest social reading and publishing site. This tutorial is intended to present some new material on leakage management and dual. Piping plan 74 externally supplied barrier gas use with single seal or dual seal increases circulation increases pressure in seal chamber clean fluids onlysolids can erode seal an orifice can can be used to reduce flow and pressure use with a single seal where fluid contains some ab1asives cools seal increases. It provides a clean external barrier fluid at a constant. Mar 08, 2016 hazardous or dangerous fluids will require more aggressive flush plans to protect the materials and workers from exposure to the product. Type ez1 cartridgemounted metal bellows seal technical specification piping plans the type ez1 bellows cartridge seal provides a means of recirculating the product, flushing, or removing air from the seal chamber to extend seal life. Simple plans can use the suction or discharge pressure of the pump to move fluid across the seal faces these plans will simply have piping with orifices leading from a port to the seal chamber. Sealing systems for pumpssealing systems for pumps part i. Piping plans seal supply systems mechanical seals configuration 3cwfb. Pr 52 and pr 53a wet seal systems john crane seal support. Api standard 682 from the american petroleum institute provides various seal plan configurations, their advantages and disadvantages and a good description of each of the plans. Selection of the right piping plan and associated fluid control equipment requires a. This guide includes illustrated pump crosssections and piping plan schematics as well as a description of the purpose, typical applications and preventative maintenance tips for each plan.
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