Case Study · Enterprise Fleet & Power Security

Distributed JY-DX5 Units Across Nigerian Subsidiaries:
75% Fewer Injector Failures, Zero Generator Downtime

Multiple JY-DX5 compact purification units deployed to subsidiary offices nationwide — large enterprise with engineering fleet and diesel generator sets, Nigeria

Project Overview

1. The Challenge: Protecting High-Value Assets from Variable Fuel Quality Across Multiple Locations

Managing fuel quality for a decentralised enterprise operating across multiple Nigerian states presents challenges that are fundamentally different from a single-site operation. Four problems were systematically damaging the company’s assets and operational continuity.

Highly variable fuel quality from local procurement

Each subsidiary procured diesel locally from the nearest available supplier. In Nigeria’s fragmented fuel supply chain, quality varies dramatically by location — particularly in remote and inland areas where diesel may have passed through multiple informal storage and transport stages before reaching the end customer. Visible water contamination and heavy sediment were routinely observed in subsidiary fuel deliveries.

High-cost precision asset damage from contaminated fuel

The company’s Caterpillar generator sets and heavy truck fleet use HPCR injection systems with injector clearances of 1–3 µm. Contaminated diesel containing particles above this threshold causes progressive injector wear, seizure, and failure. With single injector replacement costs of several thousand US dollars per unit, and multiple assets across each subsidiary, fuel contamination was generating a significant and recurring repair burden.

Power supply continuity risk

In Nigeria’s grid environment, on-site diesel generator sets provide the primary power backup for offices, data centres, and production facilities. A generator shutdown caused by a blocked fuel line or contaminated injector creates immediate operational disruption — lost working hours, data integrity risks, and production line stoppages. The indirect cost of generator downtime far exceeds the cost of the fuel system repair itself.

No standardised fuel quality management across subsidiaries

Headquarters had no visibility into actual fuel cleanliness at individual subsidiary locations. Each office managed fuel independently, with no common technical standard or purification practice. The result was a company-wide asset maintenance problem that appeared, from the head office perspective, as an unexplained and unpredictable pattern of diesel system failures.

2. The Solution: JY-DX5 as Standard Equipment at Every Subsidiary

The company’s asset management director identified fuel quality as the root cause of the recurring maintenance pattern and made a centralised procurement decision: import multiple JY-DX5 units from Jingyuan and distribute one to every subsidiary as standard operating equipment — the same approach used for other standardised field tools.

Point-of-use clean fuel barrier

Each JY-DX5 is installed between the subsidiary’s local storage tank and the end-use equipment (generator set or vehicle fuelling point). This creates a guaranteed clean fuel barrier at every asset, regardless of the quality of locally procured diesel. Fuel quality is standardised at the point of use rather than at the point of purchase — the only approach that works in a fragmented supply environment.

3 µm absolute filtration at 5 m³/h

The JY-DX5’s JINGYUAN® rigid composite polymer membrane achieves 3 µm absolute filtration at the full 5 m³/h rated flow rate. This precision level captures the fine abrasive particles responsible for HPCR injector wear — particles that pass through conventional glass-fibre nominal filters — while maintaining sufficient flow for generator pre-start fuel circulation and vehicle refuelling.

Coalescence dehydration for tropical conditions

The JY-DX5’s hydrophobic membrane phase separation stage removes free water to below 50 ppm in a single pass. In Nigeria’s rainy season, locally stored diesel frequently accumulates condensed water — the primary precondition for microbial diesel bug growth and tank corrosion. Eliminating free water at the point of use prevents the microbial contamination cycle from establishing in subsidiary tanks.

Operator-maintainable, no specialist required

The JY-DX5’s compact skid design and gas-pulse regeneration system are operated and maintained by non-specialist subsidiary staff without requiring a filtration engineer on site. The online regeneration cycle is automated and requires no consumable replacement during the 2–3 year membrane service life — eliminating the logistics challenge of sourcing replacement filter cartridges in remote Nigerian locations.

3. Results

4. Customer Statement

“We used to constantly deal with mechanical failures at different subsidiary offices, and eventually traced the root cause to fuel quality. The JY-DX5 is a very practical insurance solution — compact, powerful, and easy to operate. Since deploying it across our subsidiaries, we have not received a single stoppage complaint caused by fuel quality.”

— Director of Asset Management & Equipment, Enterprise Operations, Nigeria

5. Technical Notes: JY-DX5 for Decentralised Enterprise Fuel Management

Why HPCR generators are more vulnerable than older engine types

Older diesel generators using mechanical injection systems (pump-line-nozzle) tolerate contaminated fuel significantly better than modern HPCR common-rail systems. Caterpillar’s C-series and 3500-series generators, widely deployed across Nigeria for prime and standby power, use HPCR injection at 1,600–2,000 bar with injector tolerances of 1–3 µm. At this precision level, a single hard particle above the injector clearance causes measurable wear on first contact — making pre-use filtration essential rather than optional.

The economics of point-of-use filtration vs repair

A single Caterpillar HPCR injector replacement, including parts, labour, and generator downtime, typically costs USD 1,500–4,000 per injector. A generator set with six injectors facing annual replacement represents USD 9,000–24,000 in annual repair cost per unit — before accounting for indirect losses from power outages. The JY-DX5 capital cost is recovered within the first prevented injector replacement cycle at a single subsidiary location.

Scalability of the distributed deployment model

The JY-DX5’s compact skid footprint (1,250×1,000×2,160 mm) and self-contained operation make it practical for deployment in subsidiary offices, remote project sites, and temporary operational bases where larger skid systems cannot be accommodated. The same unit serves both generator pre-filtration and vehicle fleet refuelling — eliminating the need for separate equipment at each location.

Shenyang Jingyuan Membrane Systems Co., Ltd.  |  filtration-system.com/contact  |  info@jingyuan.hk  |  +86 138 8931 0698