Basic Product Overview
Requirements for Conveyed Medium
The fan is designed to deliver air as well as non-corrosive, non-flammable and non-viscous mixed gas. The normal operating temperature of the medium shall not exceed 50°C, with a transient peak temperature of 80°C. The content of dust and hard particles contained in the gas shall be no more than 150 mg per cubic meter. An aluminum alloy impeller matched with an explosion-proof motor can be configured for explosion-proof working conditions, while stainless steel casings and impellers are optional for anti-corrosion service environments.
Classification by Drive Mode
– Type A (Model No. 4 ~ 6.3): Direct motor coupling structure featuring compact footprint and easy installation, applicable to working positions requiring medium-small air volume and high air pressure.
– Type D (Model No. 7.1 ~ 16): Driven by bearing housings and couplings with high load-bearing capacity, suitable for heavy-duty continuous operation with high power and high rotating speed.
Rotation Direction & Air Outlet
Two rotation directions are available: left-hand rotation and right-hand rotation. The air outlet can be customized at six optional angles (0°, 45°, 90°, 135°, 180°, 225°) to fit the layout of on-site pipelines.
Overall Structure, Materials & Manufacturing Technology
- Configuration of Core Components
– Impeller (Core Working Component): Equipped with 16 high-strength forward-curved blades integrally formed through stamping and full welding of Q355 steel plates. All finished impellers are subjected to static balance inspection and high-precision dynamic balance calibration before delivery, with the peripheral linear velocity controlled below 140 m/s. The impeller operates with low vibration, superior stability, good wear and impact resistance and extended service life.
– Volute Casing: Fabricated from thickened steel plates via robotic welding, with an internal noise reduction structure arranged at the volute tongue. The whole casing boasts high structural rigidity and strong deformation resistance. Ordinary carbon steel, 304 stainless steel or 316 stainless steel are available for customization to meet anti-corrosion and high-temperature resistant requirements.
– Air Inlet: Adopts an integrated streamlined convergent structure to smooth airflow guidance, reduce air intake resistance and improve the overall operational efficiency of the fan unit.
– Drive System (Type D Only): Composed of quenched and tempered solid main shafts, integrally cast steel bearing pedestals and heavy-duty rolling bearings sealed and lubricated with long-life grease. This design delivers low failure rates and extended maintenance intervals. Shock-absorbing bases can be purchased as an optional accessory.
- Manufacturing Advantages of Roltec
Components are processed and formed by numerical control laser cutting, numerical control bending and robotic welding equipment. The factory is equipped with X-ray flaw detection equipment, magnetic particle testing devices and a dedicated aerodynamic performance laboratory for fans. Full-process quality inspection and actual performance calibration are implemented for all finished products before shipment, enabling higher precision and operational stability compared with generic OEM fans on the market.
– Full series of model sizes: 4, 4.5, 5, 5.6, 6.3, 7.1D to 16D
– Air volume range: 2198 ~ 123090 cubic meters per hour
– Total pressure range: 3850 ~ 13330 Pascals
– Supporting motor power: 5.5 kW ~ 850 kW
– Three mainstream standard rotating speeds: 960 r/min, 1450 r/min, 2900 r/min
Main Application Industries
- Thermal Forging Industry High-pressure forced air supply and combustion-supporting air supplement for forging furnaces and heat treatment furnaces; process air blasting for glass kilns and ceramic kilns.
- Powder Material Conveyanc: Closed pneumatic feeding and transportation for grains, feeds, mineral powders, plastic pellets, wood chips and waste paper scraps.
3.Auxiliary Industrial Equipment: Supporting high-pressure air blowing for carton machinery, sandblasting equipment, tempered glass production lines and coating processes; negative pressure induced draft for dust removal systems.
4.General Working Conditions Normal-pressure pressurization in chemical processes, ventilation for electroplating workshops, air circulation for storage battery production, as well as air supply and exhaust systems for high-pressure pipelines.
Core Product Advantages
- Balanced air pressure and air volume: Compared with Model 9-19 ultra-high pressure fans, Model 9-26 provides larger air volume, lower pressure drop during long-distance pipeline transportation and lower overall energy consumption.
- Low noise and low vibration: Precision dynamic balancing treatment for impellers combined with casing noise elimination structures. When fitted with standard shock-absorbing supports, the operating noise is noticeably lower than that of ordinary fans of the same type.
- Adaptability to heavy-duty continuous operation: Maintains low failure rates under non-stop 24-hour operation in mining and building material industries, featuring simple maintenance and convenient disassembly for inspection and repair.
- Comprehensive customization services: Modifications can be made on demand for explosion protection, high temperature resistance, corrosion resistance, variable frequency matching, inlet/outlet flange dimensions and base forms.
FAQ
- How to choose between Model 9-26 and Model 9-19?
Model 9-19 is designed for ultra-high air pressure with low air volume; Model 9-26 delivers moderate air pressure with larger air volume. Model 9-26 is preferred for material transportation and long-distance pipeline air supply scenarios.
- Are extra accessories required for working conditions with heavy dust accumulation?
It is recommended to install an inlet filter screen. For working conditions with highly abrasive dust, wear-resistant coatings can be added to blade surfaces.
- What are the mandatory specifications for fan installation?
The fan body shall not bear the weight of connected pipelines, and flexible connectors shall be adopted for pipeline joints to achieve vibration damping. The fan shall be started under no-load condition with the inlet valve closed, followed by gradual load application afterwards.
- How to select fan models for high-temperature gas conveyance?
Carbon steel with high temperature resistance is applicable for medium temperature ranging from 80°C to 250°C. Stainless steel impellers and casings are required for gas temperatures above 250°C.
