agitator mechanical seal design quotation

There is no one universal seal for all mixer applications. Every mixer, agitator, and reactor model is distinctive and engineered for a specific application. Many of these applications require seals to perform in environments that would destroy common seals due to extreme drag and shear forces, abrasive materials, or other challenges. That means successful sealing requires clearly defining the type of equipment, the product, and the sealing conditions. Flexaseal’s design and engineer team are capable of providing innovative solutions for your toughest challenges.

Unlike, pumps, a tank mixer is generally not designed to a standard. The exception to this is in Germany where the DIN standards are prevalent on process reactors. Greater pressure fluctuations are prevalent up to pressure reversal situations.

This is best illustrated by the Flowserve standard cartridge seal. This was originally designed as a pump seal. It was then modified to be able to operate as a mixer seal (ISC2-MW). The main difference is that the mixer version is designed to work with increased run-out associated with mixers.

– Cleaning – a mechanical seal for agitator is generally run during CIP (Clean In Place) at low speeds. A mechanical seal can be SIP’d internally for sterilisation.

We supply mechanical seals for agitators & tank mixers to the pharmaceutical, bio-pharma, chemical processing, mineral and ore processing and general industries.

If you have a technical query around the installation of mechanical seals for agitators or have some concerns around seal failures, why not contact one of our seal specialists below to discuss it in more detail and find out how we can help solve your issues and get your process running again.

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. You can use John Crane’s range of mixer and agitator mechanical shaft seals for reaction vessels to optimize safety and equipment performance, and conform to industry regulations, no matter where you are. Modern dry running mechanical seal technology and optional hygienic design features maintain product purity in mission-critical pharmaceutical applications.

The first choice for ultra-clean pharmaceutical and biotechnology applications, Type 5280 vessel seals apply Qualified Hygienic Design (QHD) and GMP standards and guidelines to enable the cleaning and sterilization of the product wetted process area with the seal in place (CIP, SIP). Due to the rotating seat design, the inboard sealing components protrude into the vessel, making them accessible for cleaning and/or sterilization devices installed in the reaction vessel. To avoid recontamination of the process vessel via the applied barrier fluid, a steam sterilization of the seal"s barrier room is feasible on request. The rotating seat design allows for application to top, side, or bottom entry mixers or agitators as well as products with a higher viscosity or solid content. This makes the seals a perfect solution for special equipment such as dryers or process filters.

Due to their modular design concept, Type 5280 seals are available in liquid-lubricated (5280 W), gas-lubricated (5280 G) and dry-running (5280 D) versions as well as a unique gas/dry face combination (5280 GD). Advantages of contacting dry-running seals include freedom from contamination by barrier liquid and a low face wear rate together with a cost-efficient, easy-to-install (gas) supply system. Advantages of gas-lubricated versions (G, GD) include the non-contacting and wear- and particle-free operation. The GD design reduces the overall barrier gas consumption compared to G version.

Type 5280 is part of a seal family consisting of different seal types that are suitable for different vessel materials: Type 5280 for steel, Type 5281 for glass-lined and Type 5282 for special alloy vessels.

​Mixer and agitator mechanical seal designs with vibration-isolated faces which withstand conditions of drag and shear that destroy common seals. Our mixer / agitator​ seals also offer excellent motion tolerance and instant pressure shift capabilities.​

Seals come in all shapes and sizes. Always speak to a professional to ensure that the right seal is chosen for the job. User manuals for equipment may also list the correct replacement seal type. However, there are many to choose from so if unsure, do not guess.

From single to dual, there are six major types to consider.. For single seals these are: rotary external seals, mixer split seals or a mixer seals. For dual seals there are high viscosity cartridge seals, mixer cartridge seals or slow speed gas cartridge seals. Since a perfect fit is necessary, be sure to have the right seal in mind before making a choice.

Mixer seals are one of the strongest. Rough conditions that are typical for mixers can seriously damage the average seal. However, motion tolerance seals with the ability to shift automatically under pressure can withstand these harsh conditions. This is the only choice for a fully operational mixer. Cartridge, on the other hand, are not built specifically for mixers but rather for interchangeable use.

Sanitary seals are typically used for extra-large, heavy or hard to reach equipment. Most of these seals feature a split design so the equipment does not have to be dismantled to change out a seal. They are also self-lubricating since it is difficult to access the installed seals for maintenance. This keeps them from drying out and cracking. Single or double sanitary mixer seals are often available to meet a variety of needs. Some can be used interchangeably while some equipment requires only a specific seal and will not operate properly with a substitute.

Always make sure the correct replacement seal is chosen to avoid damaging the mixer or agitator and spending excess money to replace a seal an extra time. Most equipment will come with spare parts and seals are often on that list. Be sure to check the spare parts from the manufacturer before purchasing a new one. Also be sure to have a properly trained individual replace the old seal by installing a new one. Someone who is not familiar with the equipment and the installation process could damage both the seal and the mixer. The manufacturer is often able to send an expert to the site to install replacements for a fee if needed.

A Cartridge Seal assembly is "pre-set" so that no installed length calculations must be performed for determining where to set the seal. Only the external seal in a double cartridge have "set tabs" that are removed once the seal is installed and the pump assembled.

Some products are not compatible with a single cartridge mechanical seal. Examples include toxic liquids whose leakage into the environment would be hazardous, liquids whose suspended abrasives would rapidly wear the faces, or corrosive liquids requiring seals made of costly materials. In recent years most states are requiring double mechanical seals to maintain fugitive emissions limitation requirements. In an effort to limit water usage, many users are converting to double seals. There are two ways to design for such products.

A double (or dual) agitator mechanical seal is basically a kind of cap that is designed in such a manner that it offers maximum sealing safety. This type of double agitator mechanical seal practically eliminates the leakage of the fluid and even the seepage of gases in pumps or mixers. The main work of the double mechanical seal is to provide a fixed level of safety and the assurance of zero emissions from the fixers. The mechanism that is being added in the double agitator mechanical seal is best in terms of design, which is not possible using the single seals. Such a mechanical seal stands high and essential when pumping or mixing the dangerous or toxic substance.

Ashish Seals India Pvt. Ltd. is a Mumbai-based organization that holds the reputation as one of the most reliable Manufacturers, Exporters, and Distributors of Mechanical Seals in India and worldwide. Its state-of-the-art infrastructure added with the talented and skilled professionals helps in providing the best quality products to the customers based in the nation and worldwide. The Double Agitator Mechanical Seal holds characteristics like Standard design, Double seal, Unbalanced, Cartridge, Independent of the direction of rotation, Operated by pressurized barrier fluid, Top/Side entry agitators.

Owing to the consistent performance and superior quality products, the ISO 9001 – 2015 Certified Company Ashish Seals India Pvt. Ltd. has been able to establish itself as a renowned company catering the products to numerous clients. The precision mechanical seal solutions offered by Ashish Seals are accepted in different applications such as Chemical, Food industry, Pharmaceutical, Petrochemical, Refineries, and many others.

The Bottom Entry Agitator Mechanical Seals are a kind of liquid lubricated agitator seals that comes with or without bearings that works for additional shaft stability. The bottom entry agitator mechanical seal is designed and built in such a manner that it works especially for high pressure and high vacuum applications. The mechanical seals are internally balanced and manufactured that it fits in accordance with the product size where used. The seals are so designed that can help remain closed when there is pressure reversal or pressure fluctuations. In addition to this, the bottom entry agitator mechanical seal comes with different characteristics that include Standard design, Double Mechanical seal, Unbalanced, Cartridge, Independent of direction of rotation, and Bottom entry agitators.

Ashish Seals is an ISO 9001 – 2015 Certified Company, and a reliable manufacturer, supplier, and exporter of Mechanical Seal in Mumbai, India and international market. The company has state-of-the-art production machines that help in manufacturing a wide range of mechanical seals for different applications. Owing to the profound infrastructure facilities of Ashish Seals added advanced machinery and allied tool facilitates in meeting the complete product needs of the esteemed clients successfully. Besides, the expertise and in-depth knowledge of the team perfectly helps in carrying out designing and manufacturing the mechanical seals as per the requirements.

The mechanical seal works by creating a restrictive flow path, and thus it is used in full vacuum conditions for sugar plants and other industries like pharmaceutical, food industry, petrochemical, and refineries.

Seal Type 510/D and 510/D/B Mechanical Seals are designed for Top, Side and Bottom Entry Drives in Agitators and Reactors. Compact Economical Cartridge Double Mechanical Seal for Agitators and Reactors. Seal Type 510/D/B Design Incorporate with location of Bearings very close to the Seal. These Seal specially designed for any mixed and pressurized liquid in Vessel with Top Entry Agitators where no leakage in Process Gas OR Fluids to the Environment can be tolerated. Complete Pre-assembled Tested Unit ready for installation. These Seal are used for Exclusive Solid Seal Faces, Stationary Seats, thus Lowest Level of Seal Face distortion when Expose to Compressive Load and Thermal Pressure..

Dry mechanical seal are designed for Agitators, Reactor, Mixers, Reaction Vessels and Blowers etc. wherein shaft drive is located mostly at the top of the vessel. The seat seal face is exposed to the gases / vapors of the product and there is no liquid coming in contact with the seat and face. The dry-running Agitator Single Seal needs no quench and no supply system because there is no need to monitor the pressure and temperature in the areas of application that is why the Seal is called “Dry Running Seal”.

The externally mounted rotating multiple spring-loaded parts are positioned on the atmosphere side. Dry running Agitator mechanical seal are available with cartridge, non-cartridge & semi Cartridge with & without bearing assembly. Dry running seals design eliminates the need of auxiliary equipment for cooling & lubricating that is required for mixer application. Since there is no use of barrier fluid, thus eliminates the possibility of product contamination.

ApplicationPharmaceutical Industries, Chemical Industries, Petrochemical Industries, Food and Beverage Industries, Non-Toxic Media, Agitator, Reactor, Mixer, Blower, Dryer, Screw Conveyor, Hydrometallurgy & Biotechnology Etc.

Mechanical Seals are designed for Top, Bottom and Side Entry Drives in Agitators, Mixers OR Blenders and where Non-Aggressive and Non-Hazardous Media are Sealed with the use of Cooling Liquid preventing against Dry Running. Construction of MOC designed of these Seals purpose of holding whole Rotary Parts together with the help of Snap Rings which eases while Installation and Removal of Seals.

"Dry Running Mechanical Seals" are outside mounted balanced mechanical seal, which require no shaft or sleeve step for balancing seal shows good performance in high vaccum conditions. Since no auxiliary equipments are needed for installation, it is very cost effective & economical. These seal can be easily installed & repaired on the feild to minimized replacements costs & downtime.

Used in top entry mixer vessels in pharmaceuticals & chemical industries, Petrochemical industry, Food and beverage industry, Non-toxic media, Agitators, Mixers, Reactor

The type ED950 is a dual-pressurized, liquid-lubricated double cartridge mechanical seal are designed for top entry, bottom entry & side entry drives mixing and agitating equipment. This seal specially designed for any mixed and pressurized liquid in vessel with top entry agitators where no leakage of highly application or fluids to the environment can be tolerated. Complete pre-assembled tested unit ready for installation. This seal show good performance in high vacuum conditions. A value-engineered design, high level of standardization and broad material options make this seal a cost-efficient solution for general-duty applications in the chemical and pharmaceutical industry. The seal is suitable for operation in potentially explosive atmospheres. Depending on individual explosion protection requirements, the seal operating limits may differ from the values given in the parameters section. Furthermore, additional monitoring devices may be required.

ApplicationDouble agitator seal are used in viscous, dry & sticky fluids in huge mixers, agitators, reactors, vessels, mills, autoclaves, driers for paints industry, chemical industry, pharmaceutical industry, plastic industries, pulp and paper industry, petrochemicals and its vapors, general chemicals and its vapors, light hydrocarbons and its vapors, hazardous & toxic application, biochemistry, polymerization, electron epoxy, power generation, chemical processing, foodstuff processing, bulk drugs and all type of clear and viscous liquids & vapors and especially suitable for heavy pollution and high suspended solid content process frequent vacuum and high pressure interchange equipment’s etc.