The centrifugal fan listed here carries 220V, material Nylon/Aluminum alloy 5052, documented exactly as the manufacturer publishes it. Made by Changzhou Sino-Pan Electrical Co., Ltd. (4 years on the platform, typical reply ≤2h). Quantity and destination market determine the final price — tell us both for a firm quote.
Key Features of This Centrifugal Fan
- Model Number: EC-133A1
- Rated Power: 88w
- Rated Voltage: 220V
- Voltage: 220
- Material: Nylon/Aluminum alloy 5052
- Speed Rpm: 5220
Technical Specifications
| Rated Voltage | 220V |
|---|---|
| Rated Power | 88w |
| Speed Rpm | 5220 |
| Speed(RPM) | 5220 |
| Efficiency | IE 1 |
| Frame | 60 mm(2.36in) |
| Motor Mounting Type | Flange Mount |
| Warranty | 3 Months |
| Continuous Current(A) | 5 |
| Model Number | EC-133A1 |
| Place Of Origin | Jiangsu, China |
| Brand Name | Sino-Pan |
| Product Name | EC Fan |
| Motor | AC |
| Fan | Backward-curved centrifugal Fan |
| Voltage | 220 |
| Material | Nylon/Aluminum alloy 5052 |
| IP | IP 54 |
| Insulation Class | F |
| Selling Units | Single item |
| Single Package Size | 40X40X26.5 cm |
| Single Gross Weight | 2.0 kg |
Product Details
EC Backward-curved Centrifugal Fan
ODM& OEMProduct characteristics
EC Backward-curved Centrifugal Fan,diameter of the fan ranges from 133mm to 630mm. The fan is made of plastic material (≤ 250mm) or metal material (≥280mm). The performance of the standard version basically covers the requirements of conventional
applications. Product certification: CCC, on demand certification CE, UL
Component of product
Backward-curved centrifugal fan, EC external rotor, motor, Collecting ring.
Working environment and applicable conditions
Power supply: Single-phase 220V~240V, 50/60 Hz
Three-phase 380V~460V, 50/60 Hz
Control mode: VSP (on-demand VSP/PWM, RS485)
Protection level: IP 54
Insulation class: F
Bearings: maintenance-free bearings
Operating temperature: -25~+60℃
Relative humidity: ≤95%
Altitude: ≤1000m
Applications
It is widely used in air purification, ventilation system, HVAC, refrigeration, rail transit and electric Max Power communication., etc.
Code Regulation


1 EC Backward-curved Centrifugal Fan
2 Fan Specifications
3 Model number code Marked with(A-Z)
4 Version number 1-9
Fan Performance Curves
The fan performance curves can clearly show the characteristics of different types and sizes of fans by graphical representation. It usually includes the full range from free delivery (unimpeded air flow) to no delivery (a system where the air flow is completely
sealed). The gas flow rate (qv) can be represented by one or more of the following parameters:
Static pressure Ps
Total pressure Pt
Power N
Fan static efficiency ηs
Fan total efficiency ηt
The following figure is a typical fan performance curve. These curves are generally subjected to laboratory tests in accordance with appropriate industrial testing standards, usually under standard atmospheric conditions. Standard atmospheric state, usually refers to the altitude of 0m, temperature 20℃, atmospheric pressure 101.325kPa, the delivery of relative humidity 50%, density 1.2kg/m3 air.


System Resistance Curves
System resistance refers to the sum of all pressure losses along the filter, evaporator, condenser, baffle, air valve and pipeline in the air duct system. It is usually positively related to the flow of gas through the system. A typical system resistance curve is shown
as follows:


Operating point
The operating point of the fan in the system is determined by the intersection point of the system resistance curve and the fan air volume static pressure curve. Usually combined with the efficiency curve of the fan, the operating point is set near the high
efficiency point of the efficiency curve, which can give greater play to the performance of the fan and save energy.


For a given duct system, the system resistance curve is not static. If there is dirt in the filter, the coil begins to condense water, or the outlet regulator changes its position, the system resistance curve will change. In this case, the corresponding design resistance is
different from the actual resistance, and the operating point will change.
In many cases, the difference between the actual output of the fan and the calculated output is caused by changes in the resistance of the system, not by the fan or motor. As shown below, the actual system has more resistance loss than the preset, so the air volume decreases and the static pressure increases.


Fan Selection Process
1. Confirm the operating conditions: airflow and static pressure;
2. Confirm the type of fan and the size of installation space;
3. Confirm the operating environment and electrical environment of the fan;
4. From 1, 2 and 3 points, preliminary screening meets the standard product specifications;
5, Confirm the control mode, installation mode, etc.
6, Confirm accessories, leads, connectors, etc.;
7. Confirm the certification requirements;
8. Confirm whether the screened products meet the requirements at 5, 6 and 7 points;
9. If it is confirmed feasible at 8 points, you can directly place an order with the business manager; Otherwise, corresponding requirements can be put forward with the business manager, and the development plan can be concluded. After the cooperation is reached, the modified development and customized development can be carried out.


Material: Impeller: Nylon with Glass Fiber
Direction of rotation: Clockwise, seen on rotor
Control input: 0-10VDC/PWM
Type of protection: IP 54
Insulation class: F
Bearing: Maintenance-free Ball bearings
Approval:CE
Amb.Temp: -25~+60℃




Ordering and Pricing
- Minimum order quantity: 1 box
- Volume pricing:
- 1–99 box: US $55.5 / box
- 100–999 box: US $54.2 / box
- 1000+ box: US $52.8 / box
- Ships from: China
- Customization: OEM and ODM accepted on qualifying volumes.
Frequently Asked Questions
What is the minimum order quantity for this centrifugal fan?
The standard minimum order quantity is 1 box. Trial orders can usually be arranged for buyers evaluating the product before a full production run.
What warranty is provided?
The manufacturer provides a 3 Months warranty. Spare parts and technical support remain available after the warranty period.
Can the centrifugal fan be supplied for my local voltage?
The standard configuration is 220V. Alternative voltage and frequency builds are available when specified at the time of order.
Do you accept OEM or custom branding?
Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.
How long does production and delivery take?
In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.
About the Manufacturer
This product is produced by Changzhou Sino-Pan Electrical Co., Ltd., based in China. The company 4 years as a verified Alibaba.com supplier, operates its own manufacturing. Browse the full Changzhou Sino-Pan Electrical Co., Ltd. range on HVACR Nexus.
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