Government Procurement Case and Bid-Winning Solution Analysis of Dongfeng’s New Sewage Treatment Truck in Urumqi In Urumqi’s winter low-temperature environment, the anti-freezing start-up performance and hydraulic system stability at low temperatures are the core concerns for municipal sanitation departments during procurement. This article provides an in-depth interpretation of the bid-winning solution for Dongfeng’s new sewage treatment truck (model reference: CLW5180GSSD6, based on official announcement parameters), drawing upon an actual 2025 municipal sanitation department procurement case. Procurement Background and Core Requirements In November 2025, the Urban Management Bureau of a district in Urumqi issued a procurement requirement for one unit of Dongfeng’s new sewage treatment truck, with a budget controlled at approximately RMB 621,000 (per publicly disclosed tender information). The procuring entity required the vehicle to operate reliably at -25°C, ensure no freezing risk in the hydraulic system, and withstand frequent winter operations. Due to the region’s extremely low winter temperatures, conventional sewage treatment trucks often suffer from difficult cold starts and hydraulic oil solidification, resulting in reduced operational availability. Following a public tender process, Chengli Special Purpose Vehicle Co., Ltd. (“Chengli”) secured the contract and successfully delivered the vehicles, leveraging Dongfeng chassis nationwide warranty coverage, lifetime upper-structure service, and customized anti-freezing solutions. Customer feedback confirmed 100% successful start-up rates under extreme weather conditions ranging from -20°C to -30°C, with no abnormalities observed in the hydraulic system. Anti-Freezing Start-Up Performance and Low-Temperature Hydraulic Stability To address Urumqi’s severe cold climate, Chengli equipped the delivered Dongfeng new sewage treatment trucks with the following key configurations: • Anti-freezing Start-Up System: Equipped with low-temperature batteries and pre-heating devices to ensure normal battery power supply and smooth engine start-up under cold conditions. According to the CLW5180GSSD6 official announcement parameters, the Dongfeng engine installed in this model is rated for operation down to -30°C. • Low-Temperature Hydraulic Oil: Utilizes lower-viscosity hydraulic oil combined with a hydraulic oil heating system to prevent pipeline freezing. The hydraulic system maintains stable pressure even at -25°C, ensuring efficient suction and discharge operations. • Winter Maintenance Program: The manufacturer provides free on-site inspections (including antifreeze, lubricants, and pipeline insulation) and establishes a 24-hour emergency response mechanism to guarantee zero failures during high-load winter operations. Additionally, the vehicle features an intelligent temperature control system that automatically adjusts hydraulic oil temperature according to ambient conditions, further reducing failure rates. A local street-level environmental maintenance unit reported after deployment: “We no longer worry about the vehicle breaking down in winter.” Performance Comparison: Dongfeng New Sewage Treatment Truck vs. Conventional Models The table below compares winter performance metrics between the two vehicle types (data source: Chengli product database and field test results): | Comparison Item | Dongfeng New Sewage Treatment Truck (Delivered by Chengli) | Conventional Sewage Treatment Truck | |------------------|-------------------------------------------------------------|----------------------------------------| | Minimum Start-Up Temperature | -30°C | -15°C | | Hydraulic System Low-Temperature Stability | Equipped with heating system; no freezing at -25°C | No heating system; prone to freezing at -10°C | | Winter Operational Availability Rate | ≥98% | ≤70% | | Manufacturer Winter Maintenance Service | Free on-site inspection + 24-hour emergency support | No dedicat