Commissioning of cabinet centrifugal fan
1. The fan allows full-voltage starting or step-down starting, but it should be noted that the current at full-voltage starting is about 5~7 times of rated current. The step-down starting torque is proportional to the square of the current. When the grid capacity is insufficient, Use a step-down start. (When the power is greater than 11KW, it is recommended to use a step-down start.)
2. When the fan is in the test run, the product manual should be read carefully to check whether the wiring method is consistent with the wiring diagram; the working voltage of the supplied fan power supply should be carefully checked whether the power supply voltage meets the requirements, whether the power supply is out of phase or in phase, and the capacity of the distributor component is Meet the requirements.
3. The number of people in the test is not less than two. One person controls the power supply. One person observes the operation of the fan and immediately detects the abnormal phenomenon. First check whether the direction of rotation is correct. After the fan starts running, check whether the running current is balanced and whether the current is current. Exceed the rated current; if there is no normal phenomenon, stop the inspection. After five minutes of operation, check whether the fan is abnormal or not, and confirm that there is no abnormal phenomenon and then start up.
4. When testing the two-speed fan, start the low speed first and check whether the rotation direction is correct. When the high speed is started, it must be restarted after the fan is stationary to prevent the high speed reverse rotation, causing the switch to trip and the motor to be damaged.
For details, please refer to the website: mixed flow fan, cabinet centrifugal fan, fire exhaust fan http://
HCPE Resin (coating type) Description
HCPE resin (coating type) is a irregular resultant after depth chlorination with the low molecular weight polyethylene (PE) . Generally the quality score of chlorine is bigger than 65%, and it is the main film-forming substances as new generation antiseptic paint. It has the following characteristics.
(1) Compared with the CPVC, the solubility is good, and more resins can mix with it.
(2) Compared with the CSM, the advantage of HCPE is single-component packaging, it do not use lead oxide, tribasic lead curing agent containing heavy metals. There is no toxicity, and has a broader range of applications.
(3) Compared with the chlorinated rubber, HCPE as the base material of protective coatings retains the advantage of chlorinated rubbers, And overcome the faults of chlorinated rubber exist unsaturated double bond and light chemical reaction and chlorinated degradation sensitive.
(4) Compared with ordinary HCPE, the viscosity is low, take the Tu-4 coating cup, the quality score as the toluene solution 20%, under the room temperature determines, is not bigger than 50S; Ordinary HCPE viscosity generally above 50S.
(5) Made of high-solids coatings, reduces the coating cost greatly, and the coating has a fast-drying nature, and has a better compatibility with other resins. LHCPE film features: The coating made by HCPE has a high solid content. excellent resistance to acid, alkali , salt, etc. It have so excellent corrosion resistance properties; can be used under 15~50°C; film drying quickly.
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