Pre-engineered solutions for high-risk industrial facilities
Mitigating dust and gas explosion hazards in Northwest Bangladesh
Rajshahi, historically celebrated for its silk, has evolved into a strategic hub for agribusiness, light manufacturing, and chemical processing in Northwest Bangladesh. The expansion of the BSCIC Industrial Estate, coupled with regional agricultural growth, has driven the construction of large-scale milling complexes, fertilizer storage facilities, and gas distribution terminals. As industrial installations grow, the requirement for safe infrastructure becomes critical.
In environments where grain dust, organic particles, and chemical vapors are common, standard mechanical systems represent a significant risk. Agricultural milling plants encounter combustible organic dust, while chemical distribution sites manage flammable vapors. The combination of suspended fine dust, atmospheric oxygen, and a thermal spark can result in dust explosions. Modern explosion-proof vertical transit systems are designed specifically to mitigate this threat.
"In critical environments, safety is not merely about system component protection; it is about preventing ignition conditions within volatile gas and dust zones."
Milling, sugar extraction, and seed handling environments generate organic particulates. Our Zone 21 and Zone 22 compliant equipment isolates mechanical friction from atmosphere exposure.
Explosion protection ratings (Ex d, Ex e, and Ex i) are integrated to isolate potential electrical sparks, providing safe operation in fertilizer storage and pharmaceutical facilities.
IP65/IP66 enclosures protect systems against high humidity and seasonal temperature changes, preventing condensation-related insulation failures.
A rigorous approach to ATEX and IECEx international standards
Explosion-proof vertical transport must conform to international classification standards. Industrial environments are classified into zones based on threat frequency and duration:
Protecting these areas requires specialized electrical engineering. Intrinsic safety (Ex i) is used for signal wiring to limit energy levels, while flameproof enclosures (Ex d) isolate power distribution devices like traction motors and brakes. By containing any internal combustion, these systems prevent external atmospheric ignition.
Explosion safety extends beyond electrical designs. Mechanical friction is a primary potential ignition source. Standard elevators utilize steel-on-steel contact, which can generate sparks under structural load or misalignment. DHI Lift explosion-proof designs incorporate specialized materials to address this risk:
China Factory 4.0: Intelligent Manufacturing & Global Supply Chain Resilience
Established in 2016, Guangzhou DHI Lift Co., Ltd. is located in Guangzhou, one of China's primary economic and manufacturing centers. This location provides access to transport infrastructure and logistics networks, supporting domestic distribution and global export operations.
The company maintains a modern manufacturing facility covering more than 45,000 square meters. As a certified A-level enterprise, DHI Lift specializes in the engineering design, manufacture, installation, modernization, and maintenance of high-performance elevator systems. In response to industry developments, DHI Lift has transitioned toward intelligent manufacturing, establishing an "Internet + Industry 4.0" smart factory equipped with automated production lines, precision component testing systems, and digital management platforms.
DHI Lift operates in compliance with international management standards, including the ISO9001 Quality Management System, ISO14001 Environmental Management System, and ISO45001 Occupational Health and Safety Management System. These frameworks, along with integrated 6S onsite management practices, guide quality assurance, environmental compliance, and worker safety protocols at all stages of production.
The company's product portfolio includes passenger elevators, freight elevators, hospital elevators, panoramic elevators, villa elevators, retrofit systems for existing structures, service elevators, escalators, and moving walkways. These products are deployed in residential complexes, commercial developments, shopping centers, medical institutions, transportation hubs, and specialized industrial facilities.
Based on the principle of "Quality First, Customer Foremost," DHI Lift maintains a customer service framework featuring a 24-hour rapid response system, specialized installation and maintenance engineering teams, and a global spare parts supply network. DHI Lift provides customized product designs and engineering support to meet the requirements of international project sites.
Compliance, installation, and field service support in Rajshahi Division
Importing explosion-proof heavy machinery to Rajshahi requires compliance with Bangladeshi building codes (BNBC) and customs regulations. DHI Lift provides comprehensive support to procurement managers and project teams throughout the import, delivery, and installation process:
Every imported system is supplied with documentation, including component certifications, Ex-compliance certificates, factory inspection records, and electrical diagrams. This documentation supports local licensing approvals, safety audits, and project commissioning requirements.
The climate in Rajshahi is characterized by high summer temperatures and high relative humidity during the monsoon season. In response, DHI Lift offers customized product options, including:
To assist local mechanical contractors, DHI Lift provides installation guidelines, structural layout designs, and real-time remote engineering assistance. For complex projects, our engineers can be deployed on-site to oversee assembly, commissioning, and final safety certification checks.
Consult with our engineering team to design, manufacture, and deliver a customized, certified explosion-proof vertical transportation solution tailored to your site's specifications.
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Essential technical and procurement insights for engineers and project managers
Gas explosion protection focuses on containing internal electrical sparks and thermal energy to prevent the ignition of volatile hydrocarbons and vapors. This is achieved using flameproof enclosures (Ex d) or encapsulation. Dust explosion protection is designed to prevent fine dust (such as grain, starch, or organic wood fibers) from entering the electrical components. This is achieved by sealing the housings (IP6X rating) and maintaining surface temperatures below the ignition threshold of dust clouds (e.g., T4/T3 ratings).
We utilize non-sparking materials, including copper alloys, brass, and high-performance synthetic materials, for structural friction points, guide rail shoes, and door hanger rollers. Traction systems are grounded using static-discharge copper straps, and automatic lubrication systems are used to prevent dry metal friction.
DHI Lift designs conform to European ATEX standards (94/9/EC Directive) and global IECEx frameworks. Every critical component, including traction motors, brake coils, door interlocks, speed governors, and control cabinets, is certified by accredited testing laboratories.
Our systems incorporate IP65/IP66 enclosures for electrical components, stainless steel (SUS304 or SUS316) for mechanical structures, and built-in climate control units (heater and dehumidifier) within the main control panels. This configuration prevents condensation and insulation failures during seasonal temperature transitions.
We supply installation manuals, architectural layout drawings, and electrical wiring schematics. DHI Lift provides remote engineering support and can arrange for qualified engineers to visit the site to assist local technicians during final alignment, safety testing, and commissioning.
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