The LKZS series double volute forward direct coupled centrifugal fan is a specialized fan for air conditioning systems developed by our company. It adopts a special structure in which the impellers of two double inlet centrifugal fans are directly connected to the long axis of the same motor, reducing the overall volume of the machine and achieving a larger ventilation volume in a smaller installation space. 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, refrigeration, purification, fresh air units, air curtains and other products. It has been widely used in hotels, schools, hospitals, factories, cold storage, cinemas, high-speed railways, urban rail transit, buses, ships and other fields.

The various specifications of this series of fans have two different air outlet angles of 180 ° and 270 °. Other special air outlet angle fan products can also be customized according to user needs, and the installation form is flexible and convenient.

This series of fans comes in two different forms of supporting motors: single-phase motors and three-phase motors. Special supporting motors with different voltages and frequencies can also be customized according to user needs, making it convenient for applications in different countries, regions, and fields.

This series of fans also offers different speed modes such as single speed, dual speed, three speed, and brushless DC (stepless speed regulation) to meet your needs for air volume regulation.

This series of fans has the following significant advantages:

1. Compact structure, small volume, large air volume, flexible and easy installation;

2. Adopting optimized forward multi blade impeller design, high pressure, low noise, high efficiency and low noise, environmentally friendly and energy-saving;

Typical model: LKZS 150 M – 4 C 2

Model meaning:

LKZS： Double volute forward direct centrifugal fan

150: nominal diameter of impeller (mm)

M： Wind turbine axial dimension code

4: Number of supporting motor poles, EC represents brushless DC motor

C： Motor power supply, single-phase power supply is C, three-phase power supply does not have this code

2: The speed mode of a single-phase fan does not have this code for single speed, 2 for dual speed and 3 for three speed

Installation angle diagram:

This series of fans has two conventional air outlet angles of 180 ° and 270 ° (see the figure below). If you need other air outlet angles, please contact our company for customization.

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: 350-16000m³/h

Full pressure: 90-900Pa

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 the fan volute, impeller, and motor shaft;

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

2. Installation

(1) The fan chassis must be installed horizontally, and vertical or inclined installation is strictly prohibited;

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

(3) 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) Before starting a single-phase fan, the air valve of the outlet pipeline should be closed, otherwise it may cause difficulty in starting;

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

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

(5) During the operation of the fan, it is strictly prohibited to extend one's body or foreign objects towards the inside of the fan to avoid danger.