Rajshahi, traditionally celebrated as Bangladesh’s center for silk production and primary agricultural processing, is undergoing a rapid transition toward modern manufacturing. Today, the BSIC (Bangladesh Small and Cottage Industries Corporation) industrial estates and emerging private sectors in Rajshahi are integrating automated technologies. From automated packaging of horticultural yields (such as the region's famous mangoes, lychees, and potatoes) to high-speed silk weaving mills, grain processing setups, and light engineering workshops, the demand for stable, high-efficiency pneumatic systems is rising.
However, industrial sites in Rajshahi face specific environmental challenges. The region experiences distinct seasonal variations, including high ambient humidity during the monsoon (June to September) and heavy airborne dust during dry periods. Standard air compressors often fail due to premature oil oxidation, filter blockage, and belt slippage caused by ambient moisture and heat. Additionally, minor fluctuations in the electrical grid require heavy-duty, tolerant electrical components and mechanical drives that can be serviced locally without specialized, imported tools. Our high-efficiency belt-driven screw air compressors address these regional requirements by combining durable components with accessible mechanical maintenance.
In the global compressed air landscape, direct-drive systems are often marketed as the premium standard. However, in emerging manufacturing hubs like Rajshahi, belt-driven screw compressors offer practical operational benefits:
Our belt-driven screw compressors are designed around high-performance air ends with optimized asymmetrical rotor profiles. The 5:6 lobe ratio ensures high volumetric efficiency, reducing internal back-leakage of compressed air.
We use heavy-duty wedge belts with high tension stability. These components resist stretching under high thermal conditions, minimizing power transmission losses. The integrated automatic belt tensioning system maintains alignment, ensuring low friction and preserving energy transfer rates over extended operating hours.
Each unit features a clean intake design. A high-efficiency, multi-stage air inlet filter removes particulates down to 3 microns. This protection is vital for Rajshahi’s dusty environments, shielding the synthetic compressor lubricant and the rotor surfaces from wear.
In high-volume applications, such as large textile processing or continuous packaging plants, energy is the largest contributor to the life-cycle cost of a compressor. For these operations, we provide **Two-Stage Direct Drive & Belt-Driven systems** alongside our single-stage units. By dividing the compression process into two stages, the pressure ratio across each stage is reduced, lowering internal gas leakage and heat generation. This design offers up to 15% energy savings compared to single-stage units operating at the same delivery pressure.
When combined with **Permanent Magnet Variable Speed Drive (PM VSD)** motors, the energy savings are even greater. The VSD system dynamically adjusts the motor speed to match real-time air demand. For processes with fluctuating loads—such as textile manufacturing or food packaging—this configuration eliminates the energy waste associated with constant unloading cycles.
Shanghai Honest Compressor Co., Ltd., a British-owned enterprise established in 2004, designs and manufactures twin-screw air compressors. Our modern plant in Jiading District, Shanghai, serves as our global production base. From here, we export industrial-grade machinery and support regional operations in South Asia, including the Rajshahi and broader Bangladesh markets.
We work with local service networks in Bangladesh to ensure that clients in Rajshahi have access to original spare parts—including high-temperature synthetic oil, replacement belts, high-precision air ends, and multi-stage filtration elements. Our technical support team assists local engineering teams with system design, correct pipe sizing, condensate drainage systems, and regular maintenance planning.
Modern industrial systems require increased connectivity and remote management capabilities. We are integrating advanced PLC control systems into our standard belt-driven screw air compressors. These systems feature Modbus RTU/RS485 communication ports, allowing operators in Rajshahi to monitor performance metrics—such as discharge temperature, system pressure, motor current, and belt slip indicators—directly through localized SCADA networks or cloud-based dashboards.
Our research and development efforts focus on increasing thermodynamic efficiency and reducing environmental impact. Our newer lines of screw vacuum pumps and oil-free screw blowers are designed to meet strict clean-air standards, helping food-processing and pharmaceutical facilities in the Rajshahi region comply with national environmental guidelines and international export requirements.
Belt-driven screw compressors are mechanically simple, making them easier to maintain in regions without highly specialized technical services. They allow for easy adjustment of discharge pressure by simply changing the drive pulleys. Additionally, the drive belts isolate the motor from the screw airend, reducing wear and protecting the system during electrical start-up shocks.
High relative humidity can lead to moisture condensation within the compressor lubricant oil circuit, which accelerates wear on the screw rotors. Our systems include automated thermal regulation valves to keep the oil operating temperature above the condensation point. We also supply heavy-duty water separators and downstream desiccant dryers to ensure that clean, dry air is delivered to your production processes.
Under standard operating conditions and with proper tensioning, our high-quality V-belts last between 8,000 and 10,000 running hours before requiring replacement. Built-in automatic tensioners reduce wear, and replacement belts are standard sizes that can be easily sourced locally.
Yes. Alongside our belt-driven systems, we manufacture and supply Permanent Magnet Variable Speed Drive (PM VSD) screw compressors. These units are highly efficient for operations with fluctuating demand, adjusting motor speeds in real-time to lower overall power consumption.
Our standard configurations feature IP54 or IP55 insulated motors rated for 380V/50Hz/3-Phase electrical supplies. We can also customize windings and control circuits to accommodate different voltage systems or specific electrical standards required by your plant.
Each unit features a PLC control panel equipped with Modbus RTU communication capability. This allows operators to integrate operational data—such as running hours, oil temperatures, and maintenance alerts—directly into centralized monitoring networks or remote management systems.
Speak with our application engineers for help selecting the right belt-driven or direct-drive screw compressor configuration to match your volume, pressure, and environmental requirements.
Send Inquiry Now