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: Chemicals
Services: Mixer Seals
Quick turnaround of Fluiten GTA 180mm double seal for 3V Cogeim Filter Dryer
Quick turnaround of Fluiten GTA 180mm double seal for 3V Cogeim Filter Dryer
Quick response to a last-minute seal problem minimises delay in commissioning new plant Client challenge:...
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Sectors: Paper & Pulp
Services: Mixer Seals
Reliable, high quality repair service for Andritz disc filter mechanical seal
EagleBurgmann LP-D/135
A paper board manufacturer based in the UK turned to NASH when they needed a high-quality repair service...
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Sectors: Chemicals
Services: Mixer Seals
Seal repair & upgrade improves reliability of De Dietrich glass-lined biconical dryer
John Crane P32SP-160mm
Cutting an international agrochemical manufacturer’s downtime from 18 weeks to 9 weeks avoided significant...
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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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