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Rail Markets
Rail Market
MCH1210H fitted on South Western Railways
Insulating Oil Filtration at a South African Transformer
335/B5200 JCB

South Western Railway scoop Golden Spanner at national industry awards

South Western Railway (SWR) operates some of the most reliable trains in the UK according to the latest industry standards. The annual Golden Spanner awards recognise the most reliable fleets in the country for improvements in train reliability across the UK rail industry. Based on statistical data which is regarded as an accurate assessment of a train fleet’s reliability, the Class 159 units operated by South Western Railway (formally South West Trains) have won Gold in the British Rail manufactured diesel multiple unit category, with 104,263 miles between any technical faults. This prestigious award has been presented to the engineering department of the train’s maintenance depot, for the past number of years. Contributing to this exceptional performance in train reliability is a host of applications and improvement measures provided by Chainings filter and Level Gauge technology.

Applications include:-

• Fuel filtration Units – Removal of water, sludges, bacterial waste deposits and other forms of contamination.

• Transmission/Gear box Oil Filtration Units – Removal of mechanical wear metal and other nonferrous fine particle contamination.

• Hydrostatic Oil Filter Assembly – Permanently installed on every vehicle to provide continuous control of oil quality.

• Hydrostatic Oil Level Gauge – Features to determine clarity of oil level in reservoir.

• Coolant Level Gauge - Features to determine clarity of Coolant level in reservoir.

• Engine Oil Level Gauge – Part of the range of Chainings Gauges which include the unique “wipe clean” design feature

Lister Petter

Sales of Chainings filters to OEM engine manufacturer pass 30000 mark” A major and iconic British manufacturer of engine and generator sets, has specified the Chainings Filter as a standard feature on all long-run series engines produced. Lister Petter Type LPW Series Engine Chainings Oil Bypass Filter Assembly Installed on the Lister-Petter LPW and T ranges, the Chainings Oil Bypass filter maintains oil quality sufficient enough to extend oil life from 250hours to 2000hours between oil change periods on their production long run series generators. Circulation of the oil through the filters consistently removes particles and aqueous contamination to provide the engine reliability required for continuous operation with extended oil drain periods.

Filter assembly part number 803-02985

Replacement element 803-02986


Chainings Oil Filtration Units are used by the National Grid PLC as part their PCB destruction plant.

Filtration Units installed at Eggborough power station to reduce heavy particle contamination in the coal mill gearboxes.

Chainings oil filtration units installed at Drax power station to reclaim Phosphate Ester Fire Resistant Fluid providing annual savings in excess of £30,000 per year.

National Grid 

National Grid own and maintain the high voltage electricity transmission network throughout England and Wales.

As part of their commitment towards environmental awareness and cost savings, a programme is established to salvage used and heavily contaminated electrical insulating oil for reuse.

Oil removed from associated electrical switchgear, divertors transformers and voltage regulators is transferred to two major oil processing plants based in the North and South of England. 

Chainings Filtration units are exclusively employed at both plants to remove carbon and water contamination from all electrical insulating oil to assist with oil recovery suitable for re-use.

Using the unique Chainings filter product, oil is consistently processed to achieve cleanliness to the within the acceptance of National Grid's quality standards. Records taken for each volume of oil processed reveal water contamination is removed down to 5-10 ppm and di-electric strength restored to values in excess of 80kV.

Having been in use for over 15 years, the original Chainings Filtration Units have now been replaced with larger models to meet an increased output of electrical insulating oil recovery.


A major UK rail company are to make savings of up to 30k/year in lost fuel costs with the added bonus of a  0.2% reduction of their total traction carbon footprint.

In association with East Midlands Trains engineering, a Chainings designed Diesel Fuel Recovery system has been installed at Neville Hill Traincare Depot, Leeds with the aim of reclaiming surplus fuel from Power cars prior to HST maintenance periods.

Traditionally, excess diesel fuel collected and stored from each trainset has been deemed unsuitable for use due to the unknown levels of contamination created during engine fuel re-circulation and transfer methods.

Rather than risk potential damage and subsequent engine failure, the stored fuel has been sold to a contractor specialised in the removal for secondary non-rail related use.

Manufactured and commissioned by Chainings, the Diesel Fuel Recovery system has capabilities in transferring and filtering diesel fuel from each HST set Power car to an externally sited yet fully insulated fuel bunker.



The stored fuel is circulated through a set of Chainings filters that have the ability to capture and retain fine particulate and water based contaminates.

Once cleaned, and as a final polish, the fuel is then transferred through the Chainings filters and back to the Power cars subsequent to the HST maintenance period.

For a faster turnaround and HST sets that require minimum maintenance periods, the Chainings Diesel Recovery system also provides an extra option to filter the HST Power car fuel system without using the storage bunker facility.

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