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Zhuhai Public Transport Group Company Scales Fleet Washing with HyTian TH-Series Bus Washers

Since 2000, Zhuhai Public Transport Group Company has standardized on HyTian’s TH drive-through bus washer across its depots, ultimately installing more than twenty systems. Early units delivered actual service life of around 20 years (vs. a 10-year design target). In 2019, the operator modernized select bays with TH-S—the newly upgraded line to TH—achieving more complete, detail-aware coverage on complex bus geometry while increasing the throughput. The relationship continues as a returning customer thanks to HyTian’s responsive service and technical support.

3 min read
TH-350S Side

Problem

  • Maintain depot-rate throughput without bottlenecks
  • Protect finishes while achieving edge-to-edge cleaning on modern bus designs
  • Fit high-capacity systems into existing urban depots
  • Reduce lifecycle costs with durable hardware and water-saving needs

Approach

  • Deploy HyTian TH drive-through bus washers, adding TH-S (newly upgraded line) in retrofit lanes
  • Configure brush arrays and spray arches for complete, detail-aware coverage
  • Specify industrial controls and long-life brush media for municipal duty cycles
  • Add wastewater recycling to lower fresh-water draw and operating cost


The Client — Zhuhai Public Transport Group Company ("Zhuhai Public Transport")

Zhuhai Public Transport’s primary transit operator manages large pull-ins/pull-outs across multiple depots. They require fast, repeatable exterior cleaning that protects livery, signage, and protruding components while keeping lanes moving at peak. Over two decades, Zhuhai Public Transport has continued choosing HyTian—evidence of long-term reliability, service responsiveness, and total-cost performance.



Challenges

  • Throughput: Keep wash cadence aligned with depot windows to prevent arrival/departure queues.
  • Finish protection: Clean thoroughly around mirrors, wipers, cameras, and route indicators without scuffing.
  • Space constraints: Retrofit high-capacity systems into existing lanes with minimal civil work.
  • Lifecycle economics: Durable structure, long-life media, and water stewardship to reduce OPEX.


Why HyTian

Zhuhai Public Transport began using HyTian TH drive-through bus washers in 2000, scaling to 20+ units with a one-bus-per-minute operation that saved labor and lifted depot efficiency. Early units exceeded expectations with ~20-year actual service life, doubling the original design goal and validating the platform’s durability. In 2019, the operator returned to HyTian to modernize select bays with TH-S, the newly upgraded line to TH, seeking a smaller footprint and even more consistent, detail-aware coverage across complex bodylines—backed by HyTian’s ongoing service and technical support.


HyTian’s Solution


  • Drive-through, continuous flow: Drivers steer through a fixed lane while synchronized brush arrays and spray arches deliver full-body coverage—front, rear, roof, and sides—supporting up to 80 buses/hour where staging permits.
  • Detail-aware, finish-safe cleaning: Symmetric, contour-following geometry and programmable logic clean edge-to-edge and around attachments, maintaining coverage consistency while protecting protrusions and decals.
  • Durability for municipal duty: Galvanized structure with baked-on coating; imported long-brush media with high wear life; integrated control cabinet for tidy installs.
  • Industrial controls & diagnostics: PLC-based control with fault protection and status prompts for fast recovery.



Water Stewardship & Recycling

HyTian offers wastewater recycling systems compatible with both the TH and TH-S drive-through bus washers. Pairing a recycling package with depot washers can significantly reduce fresh-water consumption, stabilize operating costs, and support municipal environmental targets—especially valuable at fleet scale.


Implementation

  • Site survey & layout: Engineers validated lane widths, approach/egress, utilities, and drainage to minimize civil changes.
  • Phased retrofit: TH-S modules were installed in existing bays to maintain night operations and morning pull-outs.
  • Training & ramp-up: Operators received HMI/PLC routines and brush-care guidance; cleaning profiles were tuned to urban soil loads and vehicle mix.


Results

Throughput & Operations

  • Maintained ~1 bus/minute rhythm; systems support up to 80 buses/hour, dependent on staging and depot flow.
  • Smoother pass-through with detail-aware coverage reduces stop-and-go and keeps lanes predictable.

Space & Upgrade Ease

  • TH-S footprint (about half the previous generation) enabled upgrades in tighter depots without extensive works.

Finish Protection & Durability

  • Contour-following brush design and safe avoidance of protrusions protect mirrors, wipers, cameras, and decals while achieving edge-to-edge results.
  • Long-life brush media and galvanized, coated structures suit heavy municipal cycles.
  • Proven service life: early TH installations delivered around 20 years in operation, underscoring value and reliability.

Water & Sustainability

  • Optional wastewater recycling packages curb fresh-water draw and support city environmental requirements—key for large fleets.



Partnership Timeline


  • 2000 — First HyTian TH drive-through bus washers commissioned in Zhuhai Public Transport
  • 2000–2019 — Expanded to 20+ units, sustaining minute-rate washing; early units achieved ~20 years of service
  • 2019 — Upgrade to TH-S (newly upgraded line to TH); more consistent, detail-aware coverage in a smaller footprint
  • Today — Returning customer with ongoing parts, service, and optimization support from HyTian’s regional team