mechanical seal assembly factory

Our NUTECH cartridge mechanical seals are designed to fit all ANSI pumps for ease of installation and are pressure tested at our Texas manufacturing facility prior to shipping. We can custom design any cartridge style seal to fit your most demanding applications. We use premium grade materials of construction throughout. All seals are made in the USA.

The scope of our mechanical seal product range far exceeds any other seal manufacturer. From small elastomer bellows seals used in millions of domestic water pumps to double mechanical seals that ensure maximum sealing safety and large, highly customized dry-running gas seals for mission critical high speed turbo compressors, John Crane has the right product for any application.

Our world-class rotating equipment technologies, paired with an unmatched breadth of applied engineering expertise, meet virtually all international standards including API 682 and help plants reduce maintenance costs, slash down time and improve reliability. When it comes to keeping your rotational equipment running 24/7, John Crane’s comprehensive range of mechanical seals and systems has you covered.

A range of seals for mission-critical applications, designed to solve the application-specific challenges of each industry. From API 682 compliance for the oil and gas industries, using gas seal technology on our innovative pump gas seals to eliminate fugitive emissions, dealing with slurry in the mining and minerals processing industries, to the difficulties associated with maintenance on large pumps and rotating equipment — we have a solution.

Dry-running, non-contacting gas seals have been the industry standard since the early 1980s for turbomachinery. John Crane gas seals, separation seals and support, monitoring, control and conditioning systems — the heart of any reliable sealing solution — are constantly evolving to meet the needs of customers. The product portfolio is supported by unrivaled global service capability providing repair, retrofit, gas seal storage and reliability expertise, delivering total solutions throughout the product lifecycle.

In industries like chemical, pharmaceutical, pulp and paper, and food and beverage, safeguarding and compliance with industry standards, avoiding contamination and efficiency are always top priorities. Our range of vessel and agitator seals optimize equipment performance, maintain product purity and conform to industry regulations, no matter where you are.

Our range of mechanical seals, packing and bearing isolators combines advanced, thoroughly proven technologies with extensive industry expertise to create a range of products characterized by innovative design concepts and outstanding manufacturing quality. Tried, tested and effective solutions for virtually any application that deliver robust performance, reduced installation times and lower maintenance costs.

Create the optimum operating environment that will ensure outstanding seal performance and reliability. Our comprehensive range of engineered pressure reservoirs, gas seal control panels, heat exchangers and abrasive separators can be combined to produce the perfect seal support system for any application.

Designed to overcome rigorous challenges, our comprehensive suite of seal face technologies combat limited seal face lubrication that adversely affects reliability, cost and durability. Our engineers designed these face treatments to extend rotating equipment life through advanced micro machined patterns and features improving seal face lubrication that optimizes equipment performance. We deliver the right face technology for the right application.

Our Mechanical Seals are used in a wide range of pumps and rotating equipment worldwide to prevent liquids and gases escaping into the environment. We manufacture mechanical seal types to suit all industries and our investment in modular design means that we provide the best on-time delivery performance in the industry.

The AESSEAL® range of seals, seal support systems and bearing protectors are all designed to improve pump reliability and reduce maintenance costs. Our business is built around giving our customers such exceptional service that they need never consider alternative sources of supply.

AESSEAL® operates from 235 locations in 104 countries, including 9 manufacturing and 44 repair locations, and has more than 300 customer service representatives who visit industrial plants every day. Find Out More..

Manufacturing of Mechanical Seals involves high precision light engineering activity. Close tolerances have to be maintained on most dimensions and lapped surface finishes to a flatness measured in millionths of an inch are absolutely necessary for effective sealing. Most of the machinery are general purpose, such as lathes, drilling machine, milling machines, grinding machines, etc. In addition, lapping machines are

Due to varied operating conditions, mechanical seals have to be carefully selected for every application. Important parameters that influence selection and performance of mechanical seals are : Fluid properties, operating temperatures, pressures, shaft sizes and speeds, space availability for installation and the type of equipment on which the mechanical seals are mounted.

Through a detailed study of these parameters, and on the basis of engineering standards developed through extensive research and experience, appropriate seals are selected and detailed component drawing are made. These drawing

Carbon graphite materials are purchase in billet form with various O.D. and I.D. configurations. These materials are impregnated to seal the pores and increase chemical and wear resistance. Machining is performed on dedicated and modified engine lathes. Carbon graphite machining includes turning, boring and grooving operations, utilising carbide and diamond tools. Milling, drilling and tapping operations are performed on conventional manual type milling and drilling machines Carbon seal faces are finished, lapped and polished on standard lapping and polishing machine.

These operations are performed on all seal faces using conventional lapping and polishing machines and equipment with abrasive slurry, 30 micron and 6 micron diamond.

The welding operation is performed to connect the metal terminals to the metal bellow capsules made of 350 Stainless Steel and other type of materials. This welding operation is completed by the use of specialized welding equipment, and for the metal bellow type seals only. Other welding operation involves the welding of two piece gland ring made of 316 Stainless Steel or other type materials to obtain a steam heated gland

All the components are manually assembled to check proper fitment. The final product is an assembly of various component parts, each of which is an intricate and an important part of the final unit.

Because of the technical degree of the product, the assembly and the checking procedure requires basic product knowledge, proper assembly, packaging and shipping procedures.

There are no by-products that result from the manufacturing process. The manufacture of mechanical seals is a light precision engineering industry ; no effluent or hazardous chemicals are involved in the manufacturing

For four decades, Flexaseal has been committed to designing and manufacturing sealing products and accessories of the highest quality for a wide range of industries and applications.

We provide flexible, customized sealing solutions manufactured with speed, precision, and an innovative, forward-thinking attitude. Family-owned and American-made, our vertically integrated manufacturing facilities allow us to control the destiny of your sealing solution from design to delivery.

We service industries and customers in over 30 countries worldwide. Our wide range of reliable mechanical seals are utilized for various types of rotating equipment, including pumps, compressors, mixers, steam turbines, and other specialty equipment.

If your sealing challenge requires a custom solution, our teams of experienced engineers are ready to create a reliable, cost-effective seal customized to fit your unique mechanical sealing environment. Our custom sealing solutions have a wide range of industrial applications, including refinery and API, pulp and paper, wastewater, pharmaceutical, mining, marine, power, chemical processing, and other general industries.

We manufacture custom-engineered mechanical seals, edge welded metal bellows, and the world’s first two-piece split cartridge mechanical seal. Our proprietary two-piece split cartridge mechanical seal is designed to minimize time-consuming installations and is professionally assembled and pressure tested before shipment for quality assurance.

Our expansive product line of mechanical seals includes single and dual cartridges, split seals, edge welded metal bellows, slurry, gas, mixer, multi-lip, OEM replacement, and custom-engineered mechanical seals.

We provide expert Mechanical Seal Repair of all major brands, including John Crane®, Flowserve®, Burgmann®, and more. With locations in Gonzales, LA, and Williston, VT, we are the reliable, convenient single source repair for all styles of mechanical seals.

Our comprehensive library of manufactured design solutions addresses applications in the field and pump-specific challenges providing upgrades and replacement seals manufactured to perform better and last longer.

Flexaseal’s experienced maintenance and repair technicians have worked with mechanical seals from the world"s largest pump and seal manufacturers, including John Crane® and Flowserve®. Below is just a sampling of the many manufacturers and styles that we have repaired. If your seal isn’t listed, just click “Request A Quote” to send us a message.

Each repair that comes to our repair departments in Louisiana or Vermont - whether it is a third-party design or a Flexaseal model - goes through a detailed, 5-step process to ensure customer satisfaction.

Flexaseal offers repair kits for on-site seal repair. These kits are specific to your Flexaseal cartridge and are a great way to have parts on hand for an emergency situation. All items in the kit are packaged and labeled to ensure efficient change-out.

Every mixer, agitator, and reactor model is distinctive and engineered for specific applications. When repairing a mixer seal, Flexaseal evaluates the conditions in which the seal operates. This evaluation ensures we are repairing your seal to your parameters.

Sometimes a failed seal is no longer a candidate for repair. Flexaseal provides straightforward solutions from our comprehensive seal lines or upgraded options designed for your unique operating environment.

The Flexaseal Gulf South location is a fully functional, self-sufficient mechanical seal repair and service facility for  mechanical seals. Our Southern U.S. shop - located between Baton Rouge and New Orleans in Gonzales, LA - is  a  brand new 5,000 square foot, state-of-the-art facility ready for your mechanical seal repair and service needs.

Machining Capabilities – Our Gulf Coast technicians have extensive knowledge and machining experience. These skills enable the team to quickly and efficiently process seal repairs, getting your equipment back into operation with minimal interruption.

Stocking Location – The Gonzales store front has a range of Flexaseal sealing products for immediate off-the-shelf delivery. We are also an assembly and stocking location forseal support systems including barrier fluid reservoirs.

The rotating shaft of a centrifugal pump penetrates the back end of a pump casing through a stuffing box or seal chamber. The primary purpose of a mechanical seal in a centrifugal pump is to prevent fluid from leaking to the atmosphere along this rotating shaft. Selection of the right mechanical seal for each pump application is critical when considering safety and reliability. Mechanical seal failure is typically one of the primary reasons why pumps fail. In this guide, the experts at PumpWorks will show you the steps to install a mechanical seal in your centrifugal pump with minimal downtime.

A mechanical seal requires two extremely smooth and flat (lapped) seal faces in contact, one rotating with the shaft and the other stationary with the casing. These seal faces are sealed to their appropriate holders through the use of secondary seals (o-rings or gaskets). The faces are mechanically energized and flexible so that they can be placed into contact and move to make up for static and dynamic misalignments as well as wear. The seal faces require lubrication from the fluid and break down this fluid as it tries to escape through the seal faces, resulting in slight vapor release. All mechanical seals leak…vapor…when selected and sized correctly.

You may be wondering how long the mechanical seal installation procedure will take. By following the 10 simple steps listed below, you’ll have the job done in no time.

If your pump is a ‘back pull-out’ design, remove the spacer element in the pump coupling. Then remove the casing bolts and slide the remainder of the pump away from the casing. You are now able to access the mechanical seal without having to disconnect the casing from the inlet and outlet piping. If the pump is not a ‘back pull-out’ design, you will need to disconnect the complete pump after disconnecting the coupling between the pump and motor shaft. If the pump is a close coupled design (the pump uses the shaft of the motor as its shaft and the motor directly bolts onto the back of the pump), you will need to remove the entire pump/motor. Remove the casing bolts and remove the casing.

The mechanical seal is located behind the impeller on the pump shaft. Impellers are either screwed onto the shaft or held in place via a bolt. To remove the screwed-on impeller from the shaft, use a wrench to hold the shaft in place and rotate the impeller clockwise until it is completely unscrewed. To remove a bolted impeller, hold the shaft in place and remove the bolt.

You can now directly access both the rotary and stationary seal parts. The rotary parts are typically held in place along the shaft using set screws. Remove the set screw and slide off the rotary seal parts. Remove the stationary part of the seal from the casing or seal chamber bore.

Now it’s time to place a new mechanical seal onto the shaft. Carefully slide the replacement seal parts along the shaft. Using a new o-ring or gasket material, press the stationary part into the casing or seal chamber bore. Follow the instructions for setting the rotary portion back onto the shaft correctly. This is a crucial step.

CAUTION: Always install mechanical seals in a clean working space. Don’t touch the front of the seal faces as it is susceptible to body oils and may not function properly if compromised. Keep the seal in its packaging until it’s time to install.

For back pull-out designs, slide the back pull-out assembly up against the installed casing and bolt it in place. Checking pump alignment will be necessary after step 9 below. For close coupled or non-back pull-out designs, reinstall the casing using the casing bolts. In all cases, torque the casing bolts in accordance with the pump Installation, Operation, and Maintenance (IOM) manual.

For back pull-out designs, the only steps remaining are to reinstall the spacer element to the existing coupling hubs along the pump and motor shaft, and make sure the mounting feet of the back pull-out assembly are bolted back into place on the pump baseplate. Realign the pump and motor. For close-coupled pumps, place the pump back and reconnect the inlet and outlet piping. For non-back pull-out pump and motor designs, replace the pump on the baseplate, reconnect the inlet and outlet piping, re-bolt the pump to the baseplate, reconnect the coupling and then realign the pump and motor.

Always review safety precautions found in the pump IOM. Always use the Pump IOM when working on any pump. Install the mechanical seals using the specific instructions from the mechanical seal manufacturer. Lastly, always make sure the pump and motor are realigned within 001” – 002”. Misalignment will cause premature mechanical seal failure.

PumpWorks is the go-to company for all your mechanical seal installation needs. Our pump manufacturing company offers over 30 years of experience in the troubleshooting, selection, application, and repair of mechanical seals. We serve a wide range of process industries such as petroleum refining, chemical, food and beverage, water and wastewater, power, and more.

Power machines that have a rotating shaft, such as pumps and compressors, are generally known as “rotating machines.” Mechanical seals are a type of packing installed on the power transmitting shaft of a rotating machine. They are used in various applications ranging from automobiles, ships, rockets and industrial plant equipment, to residential devices.

Mechanical seals are intended to prevent the fluid (water or oil) used by a machine from leaking to the external environment (the atmosphere or a body of water). This role of mechanical seals contributes to the prevention of environmental contamination, energy saving through improved machine operating efficiency, and machine safety.

Shown below is a sectional view of a rotating machine that requires the installation of a mechanical seal. This machine has a large vessel and a rotating shaft at the center of the vessel (e.g., a mixer). The illustration shows the consequences of cases with and without a mechanical seal.

If the aim is solely to prevent leakage from the machine, it is effective to use a seal material known as gland packing on the shaft. However, a gland packing tightly wound around the shaft hinders the motion of the shaft, resulting in shaft wear and therefore requiring a lubricant during use.

To ensure this, each part is fabricated according to a precise design. Mechanical seals prevent leakage even with hazardous substances that are difficult to mechanically handle or under harsh conditions of high pressure and high rotating speed.

A mechanical seal is installed on the impeller rotating shaft. This prevents the liquid from leaking through the clearance between the pump body and the shaft.

The face materials where the stationary ring and the rotary ring rub against each other are the most important portions as a barrier to the fluid. If the clearance is too small, the friction increases, hindering the shaft motion or resulting in seal breakage. Conversely, if the clearance is too large, the liquid will leak. Consequently, it is necessary to control the clearance in the order of micrometers to prevent leakage, but at the same time ensuring lubrication by the fluid, thereby reducing the sliding torque and avoiding hindrance to the machines’ rotation.

The mechanical seal technology is a sum of mechanical engineering and physical property technology due to the above-mentioned functions and applications. More specifically, the core of the mechanical seal technology is the tribology (friction, wear and lubrication) technology used to control the surfaces where the stationary and rotary rings rub (slide) against each other.

Mechanical seals with improved functionality will not only prevent the liquid or gas handled by a machine from leaking to the outside, but also improve machine operating efficiency, thereby helping achieve energy saving and prevent environmental contamination. Moreover, in some cases, rotating machines handle media that, in the case of leakage, can lead to a dangerous accident. Therefore, mechanical seals are required to be highly reliable through manufacturing backed by solid engineering expertise.

These functions and roles will make mechanical seals increasingly important functional parts in the future. Their further technical innovation is anticipated. To positively respond to these expectations, Eagle Industry is working on technical research and development every day.

The mechanical seal technology was fundamentally established in the 1960s. Thereafter, it has been making significant progress by introducing various leading-edge technologies, and innovative mechanical seals created from the above advanced technology are continuously being put to practical use.

To meet the demands of the market sufficiently, an applicable range of the “pressure” and “rotation speed” of mechanical seals has been considerably extended since the beginning of the 2000s. This is due to advancing of the tribology technology such as to enhance a function of the sliding materials (e.g., composite material composition, coating technology) and/or a performance of the sliding surfaces based on the fluid lubrication theory (e.g., non-contact mechanical seal, surface textured mechanical seal). These advanced technologies are sustained by improvement in the element technology of numerical analysis, processing/production, physical property/composition analysis, measurement, verification test, and so on.

SIMSITE® parts are manufactured with precision machining, which provides a product with no casting imperfections. By manufacturing our products in SIMSITE®, our parts will not corrode and therefore will not go into an imbalance, and will not support electrolysis, or stress crack corrosion. In a SIMSITE® cartridge-style mechanical seal, the seal faces and the spring tension are pre-set. The cartridge-style mechanical seal is simply bolted to the seal chamber. The springs are isolated from the fluid. SIMSITE® Cartridge Mechanical Seals come standard with SIMSITE® Structural Composite Sleeves, which are corrosion & electrolysis resistant and will protect the shaft, and prevent galvanic corrosion.

Three variables that most affect the design selection of mechanical seals are: equipmentcharacteristics, application and operating conditions, and the leak rate objective.

The first decision, however, rests in determining if one or multiple seals are required. This often has the potential for a devastating impact on overall performance and reliability.

Relatively clean process fluids with adequate lubricating properties can be contained with a single-seal arrangement. These seals are typically less expensive to install and simpler for teams to operate and maintain. If a separate lubrication system is required, a double seal arrangement will be needed. This will help ensure mechanical seal reliability.

The amount of leakage to atmosphere, which is dictated by the plant’s leak rate objectives and/or regulatory requirements, must be controlled by the seal design chosen. All end-face mechanical seals operating effectively on high-speed applications allow a small amount of vapor to pass through the primary seal interface. Average leakage will be in the 1-cc-per-day range, which is within acceptable tolerances of most process fluids.

Rotating equipmentis the primary application in which end-face mechanical seals can be cost effectively considered and applied. This equipment is used in processing gases, liquids, and slurries.

Cartridge-mounted, end-face seals were primarily introduced for installation on American National Standards Institute centrifugal pumps for making axial shaft adjustments. Their simplicity and ease of installation and maintenance makes cartridge-mounted single and dual units a strong choice for rotating equipment with a stuffing box or seal chamber in which a gland can be installed.

Air seals use a knife of air to seal the process instead of seal faces. They are primarily installed on rotating equipment used to move or mix powders, bulk solids, or heavy slurries.

One factor stands out as the primary cause of premature seal failure — application. This involves defining the conditions inside the seal chamber, which dictate how long and how well the seal performs. Once these conditions are known, the best seal design for the conditions should be selected.

Extending the life of end-face mechanical seals primarily depends on clean and cool operation, which is directly affected by the application.Misapplication of materials of construction is a common error that rapidly leads to premature seal failure. For example, process fluids that are sticky, such as glue, molasses, and paint, can bind the faces together.

Every application, process fluid, and change in the environment adds a new and often unconsidered mix of consequences, which is why the application has such a tremendous impact on seal reliability.

Once the seal design best for the application is selected, precision installation follows. Many seal failures occur because the personnel incorrectly installed the seal. If installing a component seal, an experienced technician should be the installer. Cartridge seals are simpler to install, but errors still occur. Follow the manufacturer’s instructions carefully. If external barrier fluid will be used, ensure that the environmental controls are set up correctly. Correct setup allows for the proper pressure of the barrier fluid into the stuffing box and adequate cooling of the fluid.

Many steps are required to carry out precision installation. The major steps for most cartridge mechanical seals are:Preinstallation check list (including equipment inspection and cleaning)

Inspect and empty the stuffing box, correcting any holes, burrs, or sharp edges and ensuring that adequate space is available to adequately fit the seal assembly

Defining how a mechanical seal will be used and its environment is critical for optimal operation and life. Often, seal environmental controls are over looked, resulting in shorter seal life. Even with the ideal design and precision installation, problems may arise. Any hostile operating conditions or changes in the process parameters can override the capabilities of the design and materials, thereby reducing reliability. To obtain optimal seal life, the seal should be operated and maintained as designed.

One example can be found in wastewater treatment plants where raw sewage must be moved with high-speed centrifugal pumps. These water-based solutions are entrained with solids that can hang up the seal and quickly erode the selected materials if the slurry migrates between the faces.

Flush water from an external source is a common solution for preventing premature failure. It floods the seal cavity with a clean, cool water. This flush must be maintained at a higher pressure than the wastewater because it provides a clean, cool environment that is essential for safeguarding the life of the mechanical seal. These single-seal systems operating properly will increase water consumption and will also dilute the pumped product.

In some facilities, water consumption may be a primary concern or process dilution cannot be tolerated. For these situations, a dual-seal system operating with an independent, clean-liquid flush will be required.

Other environmental factors, such as temperature and pressure, must also be carefully controlled to prevent leakage. Careful attention should be given to the environmental control systems specified for sealing hazardous or toxic fluids. They must meet the allowable leakage tolerances for the fluid being sealed and prevent excessive leakage in case a seal fails.

Mechanical seals prevent pumps from leaking by containing the pressure of the pumping process. They withstand the friction caused by the pump shaft rotating. This results in less wasted product, more cost savings, and less clean up.

MINKIX is a professional mechanical seal company that provides all kinds of inventory mechanical shaft seals for pumps, along with the same-day dispatch, and assures the aftermarket of higher quality, precision and performance.

We pride ourselves on being the in-stock supplier of mechanical seals that uses ERP to manage inventory. By doing so we are ensuring our clients are getting the right mechanical seals in the fastest manner possible.

With years of commitment to manufacturing quality seals and providing an excellent customer service, MINKIX is growing and gaining reputation and trust among wholesalers, distributors, and repair businesses.

YALAN research and development center is located in city of Hefei, the captial of Anhui Province, China. It has 10 very experienced senior engineers working as a team for developing new mechanical seal solutions and provide technical support to the production factory of YALAN Seals.

The team has accomplished a total amount of over 3,600 models of mechanical seals and won 28 patents and invention. The search center of YALAN Seals is also named as one of the national high tech enterprises and provincial mechanical seal design and development technical center.

All OEM mechanical seals are designed to increase ease of installing and deliver ultimate performance by using high quality materials. Our OEM replacement seals is cost-effective and have reliable quality. Fast delivery is assured.

Sealcon design and manufacture Grundfos pump mechanical seal to suit for Grundfos® Pump CR and CRN series Pump, JP, Grundfos® Pump CH8, CH12, CRK(I) 2, CRK(I) 4 Series Pump SPK1, SPK2, SPK4, SPK8 Series, Grundfos® Pump CM CME 1,3,5,10,15,25 Series pump and CMV pump.

Sealcon manufacture and stock Alfa Laval Pump Seal to suit Alfa Laval Pump model LKH Series Pump, FM、MR Series Pump, CMx, EMx, FMx, and GMx series pumps, ME, GM Series Pump, etc.

Alfa laval pump mechanical seals are available from stock with carbon or silicon carbide rotary faces vs. stainless steel or inserted silicon carbide faced left-hand threaded seats. O-Rings are fitted as standard, material is NBR, VITON or EPDM. if another elastomer is required please advise at time of order.

Sealcon offers a range of seals for both EMU Pump and Mixer applications, including the seals in 35mm, 50mm, and 75mm. The mechanical seal assembly is fitted within the stainless steel housing. This E913 seal model is a direct replacement seal fitted to the most common EMU Pumps.