NASH Case Studies – sharing experiences

Welcome to NASH’s case study files.

We hope they help you to understand why many engineered mechanical seal problems occur and how a range of repair and replacement solutions, along with advice on better operating conditions, can extend seal life and improve rotating equipment performance.

If you have questions about any case study – or a similar situation – please talk to us directly here.

We will be delighted to help you.

Please note that when using the filters, some Sector/Service combinations will not produce valid results

Sector Filter:
Service Filter:
Sectors: Oil & Gas
Services: Turbomachinery
Kaydon K-BOS Oil Seals Improve Performance of Flash Gas Compressors
Kaydon K-BOS
A compressor user was unhappy with flash gas compressor seal performance on one of their North Sea assets....
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Sectors: Oil & Gas
Services: Turbomachinery, Performance
Kaydon K-DGS retrofit improves seal efficiency and compressor performance
Kaydon K-DGS Tandem Dry Gas Seal
The oil seals on a multistage centrifugal compressor in a natural gas pipeline were not meeting performance...
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Sectors: Oil & Gas
Services: Turbomachinery, Performance
Kaydon K-MRC retrofit improves seal reliability and eliminates hazardous leakage
Kaydon K-MRC Multi-Ring Circumferential Seal
Existing labyrinth seals on a Fluid Cat Cracker (FCC) wet gas compressor train were proving unreliable...
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Sectors: Oil & Gas
Services: Turbomachinery, Consultancy, Partnership
Kaydon K-BOS Oil Seal with bespoke modification delivers improved turbomachinery performance.
Kaydon K-BOS Bushing Oil Seal
A compressor user was unhappy with oil seal performance on a selective hydrotreater compressor at their...
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Sectors: Paper & Pulp
Services: Mixer Seals
Rapid turnaround and joined-up service for vertical pulper seals
Safematic SAB/140mm
A Safematic SAB/140 pressurised double mechanical seal in a vertical pulper on the main production line...
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Sectors: Oil & Gas
Services: Turbomachinery
Repair and performance improvement for John Crane T28 Dry Gas Seals
John Crane T28AT Tandem Dry Gas Seal
The customer was unhappy with the performance of John Crane T-28 dry gas seals and was looking for an alternative option...
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Sectors: Pharmaceutical
Services: Mixer Seals
4-day turnaround for seal inspection and dynamic test
John Crane CK738GD/125
Many process companies hold replacement mechanical seals in stock to ensure minimum downtime when an operational...
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Sectors: Pharmaceutical
Services: Mixer Seals
Upgraded faces for dry running filter dryer seal
Flowserve Mixerpac 2552/125 Gas Lubricated Cartridge Seal
A NASH inspection found incorrect face material in a dry running seal caused rapid face wear and poor...
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Sectors: Coatings & Ink
Services: Mixer Seals
Ink-maker’s contamination problems solved
Netzsch GRD 80
Fast turnaround mechanical seal diagnosis, repair and improved operation recommendations for an Asian...
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Sectors: Oil & Gas
Services: Pump Seals
Laser etched containment seal face replaced
Flowserve QB/GSL 2625-2578
NASH quickly reverse engineers a laser etched seal face to ensure a pump repair is not delayed by a long...
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Sectors: Oil & Gas
Services: Pump Seals
NASH steps in to ensure swift repair
EagleBurgmann H75VK/80
After a rebuilt reclaimed oil pump developed bearing problems within 35 hours of commissioning, a NASH...
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Sectors: Power Generation
Services: Pump Seals, Performance
Rapid repair of essential feed pump back-up seals
John Crane Flexibox RRSP
Extensive mechanical seal face and o-ring damage linked to high ferric oxide concentrations in power station...
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Sectors: Oil & Gas
Services: Pump Seals
North Sea KSB pump seal fully refurbished
KSB UPA 350-128/2
The mechanical seal from a KSB submersible pump handling seawater was inspected, restored and return offshore...
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Sectors: Oil & Gas
Services: Turbomachinery
Raising FPSO turbomachinery seal reliability
Kaydon K-CBS Circumferential Barrier Seal
Repairing Kaydon barrier seals to consistently higher quality standards at low cost on a Floating Production,...
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Sectors: Chemicals
Services: Turbomachinery
Cutting seal repair time by 75%
Kaydon K-MOS
A two week seal repair turnaround for an unplanned outage on a refrigeration compressor train using Kaydon...
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Sectors: Chemicals
Services: Mixer Seals, Partnership
Improved seal reliability secures £1m aftermarket for glass lined vessel manufacturer
NASH has enjoyed a relationship with a company that manufactures and services glass lined reactors for...
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Sectors: Pharmaceutical
Services: Mixer Seals, Partnership
Profitable 200K seal repair revenue stream for filter dryer manufacturer
Range of engineered seals
NASH enjoys a partnership with a well-known company that makes and services Filter Dryer equipment, primarily...
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Sectors: Chemicals
Services: Mixer Seals
Swift action prevents severe production losses
Pfaudler Flexeal UF8
Cutting a global printing ink manufacturer’s plant downtime from four weeks to four days while eliminating...
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Sectors: Coatings & Ink
Services: Mixer Seals
24-hour response, analysis and advice
EagleBurgmann MR1SF5-125
Restoring output on a Netzsch bead mill within 24-hours of an EagleBurgmann mechanical seal failure with...
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Sectors: Pharmaceutical
Services: Mixer Seals
Swift turnaround meets pharmaceutical deadline
John Crane CK738G
Achieving a 50% reduction in barrier gas consumption by repairing, modifying and re-commissioning John...
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Sectors: Oil & Gas
Services: Pump Seals
Protecting North Sea crude oil production
John Crane Flexibox DRSP-1000
Eliminating unplanned outages on North Sea main oil line (MOL) pumps caused by poor John Crane seal performance,...
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Sectors: Coatings & Ink
Services: Mixer Seals
Reducing downtime while boosting performance
Buhler Cobra Mill Seal
Extending seal life, reducing excessive downtime and avoiding costly pressurised double seal unit upgrades...
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Sectors: Chemicals
Services: Mixer Seals
£140,000 of problems eliminated in four days
John Crane T151 Coaxial Cartridge
Just four days to solve a John Crane vessel seal problem behind three unnecessary seal changes that had...
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Sectors: Pharmaceutical
Services: Mixer Seals, Consultancy
Production maintained during upgrade
EagleBurgmann HSMR5S1-D1-400-KB2-A1 & HSMR5S1-130
Saving £150,000 in maintenance costs compared to the previous year by repairing and upgrading a pair of...
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Sectors: Oil & Gas
Services: Pump Seals, Performance, Consultancy
Cost-saving solution for ageing North Sea platform
Flowserve BWI/P GUHTW-4250 & BWI/P GU-3250
Saving £450,000 by upgrading and re-using six Flowserve mechanical seals rather than moving to more costly...
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  • NASH Mechanical Seal Services Ltd, Nile Street, Bolton, Lancashire, BL3 6DW, England
    Company Registration Number: 01803027

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