What is a cabinet centrifugal fan?

2025-11-20
1. Overview
1.1 HTFC-V cabinet centrifugal fan is a type of box shaped centrifugal fan with backward tilting blades. The product consists of KDF low-noise backward tilting blade centrifugal fan, motor, bearings, transmission components, soundproof box, etc. According to different installation positions, 12 different angles of air inlet and outlet positions are provided to meet the needs of users in different installation environments. According to different requirements for fire protection and ventilation, there are two types: Type A and Type B. Type A motors are installed outside the box for fire smoke exhaust and have been tested for high temperature resistance by the National Fire Equipment Supervision and Quality Inspection Center according to GA211-1999 "High Temperature Resistance Test Method for Fire Smoke Exhaust Fans". They can operate continuously for more than 60 minutes under high temperature conditions of 300 ℃. Type B motors are installed inside the box for ventilation and air exchange.
1.2 KDF fan products are divided into 17 specifications, including 2 #, 5 #, and 16 #. The air volume range is from 1000 to 300000m '/h, and the full pressure range is from 280 to 2300Pa. The fan is divided into single speed and dual speed. The dual speed fan is equipped with a dual speed motor to achieve two speed regulation, which can meet the needs of users for performance adjustment at different operating points. The fan can also be equipped with a variable frequency motor and variable frequency controller to achieve stepless speed regulation. It is recommended to lock the adjustment frequency between 25Hz and 50Hz.
1.3. To meet the requirements of explosion-proof environments, the fan can be made into an explosion-proof fan with an explosion-proof rating of EXd 11BT4, suitable for places with flammable and explosive gases.
1.4. To meet the requirements of noise in different places, fans can be equipped with mufflers of different lengths, and the soundproof box of the fan can also be thickened to reduce fan noise.
1.5. Install primary, medium, or high-efficiency filters on the fan to improve air cleanliness. When configuring the filters, actual pressure loss should be considered and the length of the fan casing should be appropriately increased.