+91 98209 33660
Precision-engineered drive and air movement units configured for continuous duty cycle performance in humid coastal conditions.
Double Inlet Centrifugal Blowers—commonly referred to as Double Inlet Double Width (DIDW) blowers—represent the pinnacle of high-volume, medium-to-high static pressure fluid dynamics. By drawing air symmetrically through dual side inlets into a centrally suspended double-width impeller, DIDW systems effectively double volumetric airflow capacity ($\text{m}^3/\text{hr}$ or $\text{CFM}$) without increasing the overall housing height envelope.
Unlike Single Inlet Single Width (SISW) fans that suffer from asymmetric axial thrust loads on motor shaft bearings, DIDW blowers neutralize axial vector forces. Air entering from opposite sides creates equal and opposite static pressures along the shaft, dramatically reducing mechanical wear on deep-groove ball bearings and extending operational lifespan under continuous 24/7 industrial duty.
The scroll housing (volute) is mathematically engineered with a logarithmic spiral expansion profile. As high-velocity air leaves the blades of either forward-curved (FC) or backward-inclined (BI) impellers, the widening volute geometry efficiently converts dynamic velocity pressure ($P_v$) into static pressure ($P_s$), allowing air to overcome extensive duct resistance, HEPA filtration banks, and industrial heat exchangers.
Sri Lanka's tropical maritime climate, characterized by ambient humidity levels exceeding 85% RH and saline coastal air, demands ruggedized ventilation machinery. Below is an engineering analysis of where Delco Double Inlet Centrifugal Blowers serve local infrastructure.
In High-Country (Nuwara Eliya) and Low-Country (Ratnapura, Galle) tea estates, controlling moisture in withering troughs and fluid bed tea dryers (FBD) is vital. Double inlet centrifugal blowers supply high-volume, uniform static air through packed leaf beds, preventing uneven fermentation and maintaining consistent leaf moisture extraction despite atmospheric humidities.
Located across Export Processing Zones (Katunayake, Biyagama, Seethawaka), modern apparel plants require stringent air exchanges and relative humidity control. DIDW blowers drive central Air Handling Units (AHUs), pulling air through multi-stage bag filters and ductwork to eliminate airborne lint while maintaining comfortable working conditions for thousands of machine operators.
Sri Lanka’s solid tire and rubber manufacturing industry (Biyagama and Horana hubs) generates intense process heat and chemical fumes. Heavy-duty double inlet blowers mounted with cast aluminum or epoxy-coated steel impellers exhaust high-temperature sulfur fumes and carbon black particulates through wet scrubbers before stack emission.
Major hotel developments along Colombo’s coastal stretch and Galle’s tourist belt rely on quiet, low-vibration double inlet blowers for duct ventilation. Direct-drive external rotor motor blowers fit into tight ceiling voids, offering whisper-quiet continuous air renewal for indoor air quality (IAQ) compliance.
Processing desiccated coconut, cinnamon, and pepper requires sterile hot-air recirculation. Stainless steel double inlet blowers withstand steam-washdown procedures and high thermal gradients, keeping thermal energy evenly distributed through industrial drying chambers.
At the Port of Colombo and Hambantota International Port, heavy electrical enclosures, inverter banks, and transformer rooms require forced-air cooling. Double inlet centrifugal blowers resist salt spray corrosion, preventing thermal tripping of mission-critical logistics equipment.
Driven by rising electricity tariffs enforced by the Ceylon Electricity Board (CEB), Sri Lankan factory operations are systematically replacing legacy IE1 motors with IE2 and IE3 high-efficiency induction motors and Electronically Commutated (EC) blower systems. Delco’s dual-inlet blower series can be seamlessly coupled with premium efficiency drives, reducing electrical kilowatt-hour consumption by up to 22% during continuous operation.
Given that key industrial zones are situated within 15 km of the Indian Ocean coast, atmospheric salt fog causes rapid oxidation of standard sheet metal housings. Procurement managers now mandate high-durability epoxy powder coatings or 304/316 grade stainless steel scroll casings to guarantee a 10+ year operational life cycle without structural perforation.
With thousands of commercial roofs installing net-metered rooftop solar arrays across Sri Lanka, low starting inrush current is essential. Delco blowers utilize VFD-rated inverter-duty motor windings with Class H phase insulation, ensuring smooth speed modulation without harmonic motor humming or insulation breakdown.
Refer to the baseline engineering specifications below when selecting blower configurations for industrial proposals in Sri Lanka.
| Blower Model Family | Impeller Diameter Range | Airflow Capacity ($\text{m}^3/\text{h}$) | Static Pressure Range (Pa) | Motor Power / Voltage | Ideal Application Duty |
|---|---|---|---|---|---|
| DIDW-FC 160-310 Series | 160mm - 310mm | 800 - 4,500 $\text{m}^3/\text{h}$ | 150 - 650 Pa | 0.25kW - 2.2kW / 230V 1-Ph 50Hz | AHU units, cleanrooms, compact duct ventilation |
| DIDW-FC 355-630 Series | 355mm - 630mm | 4,000 - 18,000 $\text{m}^3/\text{h}$ | 300 - 1,200 Pa | 3.0kW - 15kW / 400V 3-Ph 50Hz | Tea withering, textile factory general HVAC, drying ovens |
| DIDW-BC (Backward Curved) Heavy Duty | 280mm - 800mm | 2,500 - 35,000 $\text{m}^3/\text{h}$ | 500 - 2,500 Pa | 1.5kW - 30kW / 400V 3-Ph 50Hz | Dust collectors, rubber vulcanization fume scrubbers |
| Direct-Drive External Rotor DIDW | 130mm - 200mm | 400 - 1,800 $\text{m}^3/\text{h}$ | 100 - 450 Pa | 60W - 400W / 230V 1-Ph 50Hz | Hospitality ceiling fan coil units, medical incubators |
Founded in 1974 in Wagle Industrial Estate, Thane, India, Delco Fans Pvt. Ltd. brings over 50 years of direct manufacturing experience to South Asian industrial buyers. Our geographic proximity to Sri Lanka (shipping directly from Mumbai/JNPT port to Colombo Port in just 3 to 4 days) provides Sri Lankan engineering firms with unmatched supply chain responsiveness compared to East Asian suppliers.
Technical details, shipping logistics, and compliance support for importing industrial blowers into Sri Lanka.
Sri Lanka operates on a standard grid frequency of 50Hz with single-phase nominal voltage at 230V AC and three-phase nominal voltage at 400V AC. All Delco double inlet centrifugal blowers exported to Sri Lanka are engineered specifically for 230V/400V 50Hz operation, with continuous operating tolerances of $\pm 10\%$ to accommodate local grid voltage fluctuations.
Blowers bound for Sri Lankan industrial locations undergo specialized tropicalization. Housing sheets are hot-dip galvanized or coated with thermosetting epoxy polyester powder (min 80-100 microns). Stator windings receive dual varnish dip-and-bake cycles, and bearings are sealed-for-life (2RS) using synthetic wide-temperature grease rated from $-30^\circ\text{C}$ to $+150^\circ\text{C}$.
Transit time from JNPT/Nhava Sheva Port (Mumbai) to Colombo Port is among the fastest international sea lanes, typically taking only 3 to 5 days on water. Total door-to-port delivery for standard or customized production batches usually spans 2 to 3 weeks, significantly reducing project downtime compared to 6-8 week lead times from Europe or East Asia.
Yes. Our engineering shop regularly works from customer drawings, physical samples, or 3D STEP files to match mounting footprint dimensions, shaft heights, discharge flange bolt circles, and housing orientations (LG/RD 0°, 90°, 180°, 270°). This allows retrofits without modifying existing plant ductwork.
Yes. Delco Fans Pvt. Ltd. provides complete India-Sri Lanka Free Trade Agreement (ISFTA) documentation, including official Certificates of Origin issued by authorized Indian trade agencies. This allows Sri Lankan importers to claim preferential or zero-duty customs clearance rates.
Need precise airflow calculation ($\text{CFM}/\text{m}^3/\text{h}$) against system static pressure ($\text{Pa}/\text{in.wg}$) for your Sri Lankan installation? Our technical team is standing by to review your duty point specifications.
Send an Inquiry