9-19 and 9-26 High-Pressure Centrifugal Fans

9-19 and 9-26 high-pressure centrifugal fans are typically used for forging furnaces and high-pressure forced ventilation. They can also be widely applied to convey materials, air, and gases that are non-corrosive, non-self-igniting, non-explosive, non-volatile, and free of sticky substances. The medium temperature generally does not exceed 50℃ (with a maximum limit of 80℃), and the content of dust and hard particulate matter in the medium should be no greater than 150 mg/m³.

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Usage

9-19 and 9-26 high-pressure centrifugal fans are typically used for forging furnaces and high-pressure forced ventilation. They can also be widely applied to convey materials, air, and gases that are non-corrosive, non-self-igniting, non-explosive, non-volatile, and free of sticky substances. The medium temperature generally does not exceed 50℃ (with a maximum allowable temperature of 80℃), and the concentration of dust and hard particulate matter in the medium should be no greater than 150 mg/m³.

Style

1. This fan is of the single-inlet type and typically comes in sizes №4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, and so on.

12.5, 14, and 16—total of 13 machine numbers.

2. This fan is typically manufactured in two types: right-hand rotation and left-hand rotation. When viewed from the end of the motor, if the impeller rotates clockwise, it is referred to as a right-hand rotating fan and denoted by “right”; if it rotates counterclockwise, it is referred to as a left-hand rotating fan and denoted by “left”.

3. The outlet position of the fan is indicated by the outlet angle of the fan casing. Both “left” and “right” can be configured in six angles: 0°, 45°, 90°, 135°, 180°, and 225°.

4. The fan drive methods are divided into three types: Type A (No. 4 to 6.3), Type D, and Type C (No. 7.1 to 16).

When the aforementioned machine model, rotation direction, air outlet angle, and transmission method fail to meet your requirements, we are fully capable of designing a solution for you—continuously refining it until you are completely satisfied.

Structural features

Nos. 4–6.3 consist primarily of an impeller, casing, air inlet, support frame, and other components; Nos. 7.1–16 consist primarily of an impeller, casing, air inlet, transmission assembly, and other components.

① Impeller—The 9-19 type fan has 12 blades, while the 9-26 type fan has 16 blades; both are forward-curved blades. The maximum peripheral linear velocity at the outer edge of the impeller diffuser shall not exceed 140 m/s. After being formed, the impeller undergoes static and dynamic balancing corrections as well as overspeed operation tests, ensuring smooth and reliable operation.

② Casing — Welded from high-quality galvanized steel sheet into an integral volute shape.

③ Air inlet—designed as a streamlined, converging integral structure, fixed to the front cover plate with bolts.

④ Transmission Assembly—comprising the main shaft, bearing housing, coupling, and other components. The main shaft is made of high-quality steel, and the bearing housing features an integral structure equipped with rolling bearings lubricated by bearing grease.

Fan operation

Before starting the fan, the following preparatory work should be carried out:

① Close the air intake valve and slightly open the air outlet valve.

② “Start the machine” to check whether the fan and its system exhibit any unusual noises, odors, or vibrations. If such issues are detected, they should be addressed immediately. If no issues are found, gradually increase the duration of the “start-up” period until the system reaches normal operation.

③ When the fan starts up and reaches its normal operating speed, you should regularly check during operation whether the bearing temperature is within the normal range. Unless otherwise specified, the temperature rise of the bearings shall not exceed 40℃ above the ambient temperature. The root-mean-square value of vibration velocity at the bearing location must not exceed 6.3 m/s. If you notice any signs of severe vibration, impact, or a rapid increase in bearing temperature, you must immediately stop the fan.

Scope of Supply for Standalone Products

1 fan, 1 matching motor, 1 set of anchor bolts (4 sets for sizes №4 to 6.3, and 8 sets for size №7.1 and above), and 1 coupling (for sizes №7.1 to 16).

Ordering Instructions

1. When placing an order, please specify the fan model number, speed, static pressure, airflow rate, outlet angle, rotation direction, as well as the motor model and specifications.

2. The impellers of centrifugal ventilators No. 8 (2900 r/min) and No. 16 (1450 r/min), model 9-26, are made of high-quality alloy steel plates and must be discussed with the manufacturer when placing an order.

Keywords:

9-19 and 9-26 High-Pressure Centrifugal Fans

Category:

Industrial centrifugal fan