The LKZWH series rear non volute single inlet direct coupled centrifugal fan is a new type of fan developed by our company. It does not have a volute and can be directly installed in equipment that requires ventilation or placed in any size of bellows. In such special work situations, its efficient working area is wider than that of ordinary centrifugal fans, and the noise is lower. In addition, as its air outlet direction is not limited by the volute shell, multiple volute free centrifugal fans can be simply installed in the same air box to form a fan group, which can be used to replace large-diameter fans, thereby reducing the noise and volume of the entire unit.

The fluid model of this series of fans has been optimized using advanced CFD technology, which not only increases output pressure but also reduces noise and improves efficiency. It has the characteristics of energy saving and low noise, and is particularly suitable for supporting various air conditioning, purification, fresh air, HVAC, refrigeration and other units. It has been widely used in hotels, restaurants, schools, hospitals, factories, cold chains, cinemas and other fields.

This series of fans has two different installation methods: vertical and horizontal. They can also be customized into bellows or other special installation methods, with flexible and convenient installation forms.

This series of fans has the following significant advantages:

1. A wider and more efficient workspace, with more flexible airflow direction;

2. Simple structure, small size, light weight, flexible and easy installation method;

3. Adopting optimized design of the backward impeller, it has high efficiency, low noise, and is energy-saving and environmentally friendly.

Typical model: LKZWH 560 – 4

Model meaning:

LKZWH： Rear non volute single inlet direct coupled centrifugal fan

560: nominal diameter of impeller (mm)

4: Number of supporting motor poles

The working environment suitable for this series of fans is:

1) Altitude not exceeding 1000 meters;

2) The ambient temperature shall not be lower than -25 ℃ and not higher than 40 ℃;

3) The relative humidity of the environment shall not exceed 90%;

4) The transported gas does not contain acidic, alkaline, or corrosive media, and the dust content is not greater than 150mg/m³.

When the working environment does not meet the above requirements, it needs to be explained when placing an order. Our company can customize according to specific on-site conditions.

Flow rate: 1500-28000m³/h

Total pressure: 220-1500Pa

Beyond this range, please choose other series of fan products from our company, or contact our company for customization.

1. Pre use inspection

Before use, please carefully check:

(1) Whether the motor is intact and undamaged;

(2) Are all bolts loose;

(3) Are there severe deformations in components such as impellers and motor shafts;

(4) Rotate the impeller by hand, and the rotation is smooth and there is no obvious lag phenomenon.

2. Installation

(1) The grounding bolt of the fan should be reliably grounded;

(2) The fan should be equipped with phase loss and overload protection devices;

3. Start and Run

(1) Before starting the fan, the working power supply should be checked and must be within the range of rated voltage ± 5% and rated frequency ± 1%;

(2) The rotation direction of the fan impeller should be the same as the direction marked;

(3) The operating current of the fan should not exceed the nameplate current, otherwise it may cause damage or burning of the motor;

(5) When the fan is running, it is strictly prohibited to approach or touch the impeller to avoid danger.