Category Archives: Mechanical Seals

EagleBurgmann Shaft Seals in Waste Paper Treatment

Waste paper treatment is of great significance in the paper industry. The collected and sorted waste paper is fiberized in pulpers using large amounts of water with the addition of chemicals and is sorted into slightly and heavily contaminated fractions.

In the de-inking process, the printing ink is removed by means of chemicals and mechanical forces and is skimmed as foam from the surface in the subsequent flotation.

The risk of dry running for the mechanical seal is especially great for the machines used in the flotation process. The seals in the coarse screening are subjected to intense stress due to the contaminations inclined to plaiting. Know-how and experience in the selection of seals and materials are requirements in order to ensure optimal and trouble-free operation.

The shafts of bleaching agent pumps, MC pumps, dispersers, slurry pumps, sorters, pulpers and fiberizers are successfully equipped with EagleBurgmann single and double seals of the LP, M7N, M74, HR and Cartex-DN series. Thermoflon and Buramex type compression packings reliably seal bleaching agent pumps and separators in the waste paper treatment process.

Waste Paper Treatment Process

Waste Paper Treatment Process


Successful Mechanical Seals for Waste Paper Treatment Facilities

Kartonsan Turkey PumpsIn Kartonsan Turkey, numerous pumps for pulp treatment and in the de-inking system have been successfully equipped with EagleBurgmann Burasoft 6225-L type compression packings.


UPM Kymmene ShottonAt UPM Kymmene Shotton in England, nine Voith pressure screens in waste paper treatment are being used successfully with EagleBurgmann HR-D type double cartridge seals. Medium to be sealed: Pulp fibers 1.5 … 4 % abs. dry and water, p = 8 bar (116 PSI), t = max. 40 °C (104 °F).


Palm Worth GermanyIn the waste paper treatment at Palm in Wörth, Germany, four TL200/TL300 type Metso Screens with LP-D-ST-D15/130-DE were retrofitted to non-flow operation and have been running in continuous operation (24 hrs./day) since 2004. Medium: Pulp 3 % abs. dry and water, t = 50 °C (122 °F), p3 = 4 bar (58 PSI), n = 800 min-1.


Stora Enso Maxau GermanyAt Stora Enso Maxau, Germany, Voith slot sorters in a waste paper treatment plant for the production of standard and upgraded newsprint paper are sealed with EagleBurgmann HR10 type seals (“dead-end”). Flushing with circuit water (return water) is used only when the medium has a too high solids content. Face material combination SiC/SiC, shaft diameter d1 = 46 … 130 mm (1.81” … 5.12”), p1 = 1 bar (15 PSI), t = 60 °C (140 °F), n = 980 min-1, medium: Paper pulp (0.2 … 5 % abs. dry). The Palm Paper Ltd. paper mill produces newsprint for national and international newspapers. Production is based solely on waste paper pulp.


Palm Papter Ltd. TotalSealCare Service AgreementA TotalSealCare service agreement having a duration of several years includes servicing of all installed mechanical seals for pulp pumps, mixers and various pressure screens. Additional contractually agreed services are on-site presence during start-ups, troubleshooting and providing seal-related schooling and training courses for plant personnel.


To Learn more about which seal might be right for your application, contact us today at 1-800-822-4063 or click the button below.

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Upgrade from Pump Packing to Mechanical Seals

Mechanical sealing conserves water, improves energy efficiency, and minimizes environmental impact

The environmental performance of products and processes in all industrial sectors increasingly is cause for critical inspection, with sustainability, conservation of natural resources, and reduced environmental contamination concerns influencing equipment design and selection.

Many industrial processes can be addressed to improve sustainability and minimize environmental impact, while at the same time maintaining or reducing operating costs. Implementing energy-efficient and environmentally friendly processes and technologies should be embraced as a priority at the component, process, and system levels.

One aspect of these processes is mission-critical rotating equipment, and specifically centrifugal pumps, which represent a significant proportion of the equipment found in industrial operations. One vital component of a centrifugal pump is the seal around the rotating shaft that passes through a stationary pressure casing or housing. The seal contains the liquid or gas from escaping to the environment.

Sealing systems help maintain acceptable pump efficiency, reliability, energy consumption, water usage, and emissions control. These factors can materially facilitate achieving total-life cycle cost-reduction and sustainability objectives. Sealing performance can be improved for centrifugal pump applications by upgrading from traditional compression packing to mechanical seal technology.

When sealing a centrifugal pump, the objective is to allow the rotating shaft to enter the wet area of the pump without large volumes of pressurized fluid escaping. The pump discharge pressure forces the fluid back behind the impeller, where it is induced to exit by way of the rotating drive shaft. To minimize leakage, a seal is needed between the shaft and pump housing to contain the pressure of the process being pumped and withstand friction caused by shaft rotation.

Compression packing is the traditional means to seal centrifugal pumps, going back more than 100 years. Also referred to as gland packing, it is a braided, rope-like, and lubricated material packed around the shaft in rings, physically stuffing the gap between the shaft and the pump housing, within a stuffing box.

Water leakage and consumption

Charred packingFor compression packing to work, some leakage must be maintained to lubricate and cool the packing material. Therefore, packing rings allow for an adjustable, close-clearance leak path parallel to the shaft axis. As the packing is used, however, some of the lubricant that is embedded into the packing is lost, reducing the packing ring’s volume. The pressure squeezing the rings together is also reduced, increasing leakage.

Periodic adjustment of the packing follower brings the pressure back into specification and controls the excess leakage. In today’s world, however, this maintenance is not always being done at required intervals or adjusted correctly. As the number of centrifugal pumps incorporating the use of compression packing decreases, training for and understanding of packing maintenance has waned.

Consequently, under-tightening and over-tightening of packing rings is a prevalent and growing misapplication of centrifugal pump maintenance, with critical consequences to both water consumption and energy draw.

Under-tightening results in too much leakage. Already, when properly adjusted, packing leakage can amount to gallons of liquid leaked per minute. This can be either aqueous solutions comprised of varied benign or caustic chemical compositions, or particles in suspension or slurry, depending on the process.

The heavier the suspension or slurry content in the pumped liquid, the more water is needed to get packing to work reliably. Typically, a clean external flush is piped into the stuffing box through a lantern ring, which keeps the packing lubricated and cool while flushing abrasives and chemicals.

Normally, some portion of the leakage is released continually into the atmosphere. Under-tightening of the packing rings and use of external flushes increase this atmospheric release proportionately, along with environmental impact potential. Continue reading Upgrade from Pump Packing to Mechanical Seals

Case Study: A Single Mechanical Seal, But Twice As Safe Under High Pressure

Mechanical Seal SHVI and Plan 66A for Unmanned Pump Station of an Oil Pipeline

A well-known Canadian operator of an oil pipeline commissioned EagleBurgmann to develop a sealing solution for crude oil pumps. The requirement: It needed to be a single seal that was just as safe as a double seal with buffer pressure system. In addition, the sealing solution was not to be designed for only one pump type but should be installed in various pumps of one station.

SHVI Operating Conditions

The operating parameters were quite extensive: The seal needed to be suitable for a pressure range from 2.5 bar (36 PSI) to 99 bar (1,436 PSI) as well as for shaft diameters from 115 mm to 155 mm (4.53’’ to 6.10’’). Since the pump stations are operated unmanned, the seal must operate without an additional supply system. To protect the environment and personnel, however, the seal housing must not leak if the seal fails unexpectedly.

The solution: Mechanical seal SHVI from EagleBurgmann

These requirements were best met by the SHV series which has proven itself thousands of times over in crude oil pumps and MOL pumps (MOL: Main Oil Line) of all types worldwide for many years. For the Canadian customer, EagleBurgmann developed the SHVI sealing variant with loosely inserted seal face specifically for the high-pressure range. The seal face is single, but is twice as safe under high pressure and is designed such that it always builds a parallel sealing gap with the stationary seat. The deformation behavior of the seal  face was optimized for use in crude oil pumps so that the seal operates reliably even under very high pressures, sliding velocities and temperatures as well as pressure and temperature fluctuations.

Silicon CarbideEagleBurgmann selected a special quality of the silicon carbide material to be used in the pumps of the pipeline operator. This provides the seal face with particularly good emergency running properties and tolerance for partial dry running. In addition, the sliding faces have extremely precisely ground grooves which allow the seal face to be lifted quickly even in the low pressure range and contribute to stable operation in a wide pressure range.

Safety: Optimized API Plan 66A

Plan 66A, which has been available since introduction of API 682 4th Edition, was the obvious choice for the safety concept. Accordingly, the seal housing contains two throttles, and the seal chamber is connected to a pressure transmitter.

SHVI PipelineEagleBurgmann optimized the plan and uses a special inner, floating  throttle. This can withstand a product pressure of 99 bar (1,440 PSI) in an emergency. The pressure transmitter detects pressure changes in the seal chamber and signals an alarm if certain values are exceeded. At the same time, the seal leakage accumulated under low pressure is discharged to a central collection system in the pump station.

Test and Acceptance

The SHVI seal and the optimized Plan 66A were subjected to dynamic and static tests individually and together on EagleBurgmann test benches. The constant and reliable sealing performance in all operating states and the safe function of Plan 66A in the event of a fault provided impressive results. The required system safety was provided at all times.

The new concept of the SHVI single seal with optimized Plan 66A is economical, modular, reliable in operation, and offers the safety of a double seal.

There are plans to convert further pumps of the pipeline operator. The new concept of the SHVI single seal with optimized Plan 66A is economical, modular, reliable in operation and offers the safety of a double seal. For other customers as well, this type of seal has since proven itself in MOL pumps for several thousand operating hours.


To Learn More about the SHV series of mechanical seals, contact us today at 1-800-822-4063 or click the button below.

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Your Seal Pump Just Failed and Production is at a Stop… Now What?

Can your Facility Afford Extra Downtime?

Introducing the new CartexExpress Rapid Ship Program!

CartexExpress

Fast delivery for Cartex mechanical seals is available (if necessary) when an order is received by 12pm CST.


Not familiar with Cartex by EagleBurgmann?

Cartex Mechanical Seals are engineered to provide the extra margin of performance.

EagleBurgmann’s mechanical seals are designed with greater attention to functional details like tighter tolerances for more accurate seal operation, greater axial movement to handle pump shaft movement, seal parts with robust cross sections for optimal seal stability in operation, and castings that meet ASTM A 351/351M standards for proven quality.

cartex mechanical sealHighlights and Advantages of Cartex

  • Ideal for use in ANSI process pumps
  • Universally applicable for packings conversions, retrofits or original equipment
  • Ideal seal for standardizations
  • No dimensional modification of the seal chamber necessary, small radial installation height
  • No damage to the shaft by dynamically loaded o-ring
  • Extended service life
  • Installation faults are avoided, cost-effective
  • No damage caused by dirt entered during assembly
  • Straight-forward and easy installation due to pre-assembled unit (reduced downtimes)

Recommended Applications

Cartex Seals are designed with greater attention to functional details like tighter tolerances for more accurate seal operation, greater axial movement to handle pump shaft movement, seal parts with robust cross sections for optimal seal stability in operation and castings that meet ASTM A 351/351M standards for proven quality.

  • Process, petrochemical, chemical, pharmaceutical, power plant, pulp and paper, water and waste water, mining, food and beverage, universally applicable, ANSI process pumps

Cartex Seal High-Performance Materials

cartex materials


So, Which Cartex Seals are Included in the Express Program?

  • Single seals
    • -ASTN and -ABTN
  • Dual seals
    • -ASDN and -ABDN

cartex express single and dual seals

Comparison With Competition: Part vs Part

Cartex seal faces, o-rings, drive pins and spring are more robust and
specifically engineered for superior strength, heat removal and maximum reliability and performance vs. competing modular seals.

  • Robust engineered design – Less sensitive
  • Fewer o-rings and components – Reduced possible leakage paths
  • High-performance pumping feature – Lower operating temperatures

cartex vs modular


So the next time your production is suddenly at a stop or you have unplanned issues and need a mechanical seal fast – contact Gallagher Fluid Seals and ask about the CartexExpress program.

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H75VN Mechanical Seal for Cumene Pump Station

Retrofitting a Pump with an EagleBurgmann H75VN

Cumene, the common name for isopropylbenzene, is an aromatic hydrocarbon and a colorless liquid under atmospheric conditions with a characteristic smell. It is a component of crude oil and refined fuels and is mainly used in the production of phenol.

The Problem

Ineos in Gladbeck and Degussa in Marl, both located in Germany, are supplied with cumene by a pipeline. The pump station for this pipeline is situated inside the chemical industry park in Marl and is operated by Degussa Infracor. Cumene is classified as hazardous to the environment, so the “TA-Luft” directive (German Clean Air Directive) has to be considered for any sealing solution.

Originally, the pump was equipped with a Flowserve mechanical seal type EUROPAC 613/663 in tandem arrangement. With this seal, the required maximum temperature of the supply medium of 104˚F (40°C) was always exceeded and the seal was continuously squeaking during operation.

Operating Conditions

  • Medium: Cumene
  • Operating temperature: 41˚F – 122˚F (5 – 50˚C)
  • Operating pressure at seal: 17.4 – 34.8 psi (1.2 – 2.4 barg)
  • Pump: Centrifugal pump, type MC 80-260/62
  • Pump manufacturer: Sulzer
  • Speed: 2,975 rpm
  • Seals include materials: H75VN/80-FTA5, AQ1KMG – AQ1KMG
  • Mode of operation: Plan 11 and Plan 52 according to API 682
  • Supply system: TS 2000/M051-A1, operation under atmospheric pressure

The EagleBurgmann Solutionpicture of the H75VN

The critical points of this application are the poor lubrication properties and the low heat capacity of the process medium. The engineered EagleBurgmann H75N mechanical dual seal in tandem arrangement was selected and retrofitted to the pump.

Technical features of the EagleBurgmann H75VN seal:

  • Cartridge unit, easy to install
  • Certified according to API 682/ISO 21049 for the application in flashing hydrocarbons. Meets the requirements for low emission seals based on STLE-limit values
  • Counter-rotating pumping screw to support the circulation of the buffer medium to ensure an optimal cooling and lubrication of the mechanical seal
  • Plan 11 and 52 with multi-point injection: the buffer medium is divided into several sub-currents that are directed towards the sliding face at relatively high flow velocities, improving heat removal from the mechanical seal
  • Self-closing: the seal will remain closed and will keep the full functionality even in situations of pressure reversal or failure of the supply system
  • Perfluoroelastomers due to the chemical resistance

Conclusion

The EagleBurgmann H75VN meets all requirements of the operator regarding the maximum buffer fluid temperature of 104˚F (40°C), and the squeaking of the seal was eliminated. The mechanical seals have been successfully in operation since the beginning of 2006 and have been running to the full satisfaction of the customer, with further pumps retrofitted currently. Additionally, the EagleBurgmann H75VN mechanical seal is now specified as standard for pipeline pumps.


Gallagher Fluid Seals is an exclusive distributor of EagleBurgmann. For more information about custom solutions or mechanical seals, contact our engineering department, or call 800-822-4063.

Gallagher to Partner with EagleBurgmann

Gallagher Fluid Seals, Inc. Awarded Exclusive Distribution Rights with EagleBurgmann

Partnership will expand Gallagher’s OEM and MRO business into the mechanical sealing industry

Gallagher Fluid Seals, Inc. has exciting news for its customers. EagleBurgmann, a leading provider of industrial sealing technology, has awarded Gallagher Fluid Seals with exclusive distribution rights in the Northeast and Mid-Atlantic territory of the United States. The territory includes Maine, Vermont, Massachusetts, Connecticut, New Hampshire, Rhode Island, New York, New Jersey, Pennsylvania, Delaware, Maryland, Washington D.C., and Virginia.

picture of gallagher and eagleburgmann map

2019 marks 63-years in business for Gallagher. As the global sealing landscape has continued to evolve since 1956, so has Gallagher. New technology brings new sealing challenges, and that has allowed the expansion of new areas of expertise and growth – enter mechanical sealing.

EagleBurgmann has a wide array of product lines, including: mechanical seals, carbon floating ring seals, and magnetic couplings. Gallagher is focusing strictly on mechanical sealing products from EagleBurgmann, which include: Cartex Cartridge Seals, SeccoMix 1, H75VN, Splitex® Cartridge Split Seals, Unitex, MBS682 Metal Bellows Seal, and much more.

“We are thrilled to have this new partnership with EagleBurgmann,” says Chris Gallagher, CEO of Gallagher Fluid Seals. “EagleBurgmann’s gold-standard level of service, quality, and support will allow us to enter this new market both efficiently and effectively.”

With Gallagher account executives located throughout the Northeast & Mid-Atlantic, and a team of experienced full-time mechanical engineers on staff, customers can expect prompt service and custom sealing solutions if their application requires it.

This new partnership is an exciting start to 2019, and Gallagher will continue in its mission to work with customers whose sealing applications are critical to the performance of their equipment.

Want to speak with an engineer or account executive? Contact us today:

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About Gallagher Fluid Seals, Inc.

Gallagher Fluid Seals, Inc. is a global distributor and manufacturer of Fluid Sealing products. Gallagher represents the strongest seal manufacturers in the world, in addition to operating its own gasket fabrication facility. Gallagher serves both OEM & MRO customers through the development of technical solutions that solve sealing challenges.

Gallagher Fluid Seals currently operates 3 Facilities; its headquarters in King of Prussia Pennsylvania, and it’s 40,000 square foot gasket fabrication and sales office in East Longmeadow, Massachusetts, and the newly-acquired Quality Seals office in Bethel, Connecticut.

Contact:
Kevin Patton
Marketing & Communications Analyst
610-277-8200

 

About EagleBurgmann

EagleBurgmann is one of the leading providers of industrial sealing technology on the international stage. Their products and comprehensive services are used wherever the key requirements are reliability and safety.

Excellent quality, close proximity to their customers, great capacity for innovation and an extensive product portfolio for nearly all industrial processes and fields of application are what make them stand out.

Their portfolio includes mechanical seals and seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints and gaskets, packings, special products and extensive services. Being part of the German Freudenberg and Japanese EKK group gives EagleBurgmann all the resources they need for a reliable partnership built on solid foundations. Worldwide.

Contact:
Ekaterina Shkarbul
Marketing Manager BA Americas