BF series transformer fanDetailed product description：

Scope of Application

The transformer fan is suitable for the cooling system of large and medium-sized transformers. It is designed and manufactured according to the professional standards of the People's Republic of China, such as ZBK22002-88 "Technical Conditions for Three phase Asynchronous Motors for Transformer Cooling Fans" and ZBK41008-89 "Transformer Fans". This product absorbs the advantages of similar products at home and abroad, and has excellent aerodynamic performance, low noise, high efficiency, high protection level, safety and reliability. It is currently an advanced specialized fan in China.
The transformer fan consists of a single-stage axial flow impeller and a dedicated electric motor. The blades are of equal thickness and wing shape, made of high-quality materials. The motor shaft extension end adopts a double set bearing structure and is equipped with a pressure injection oil cup, which can regularly replenish lubricating grease to extend maintenance time. The joint and other parts are sealed with 609 # polymer liquid sealant, which has good protective effect. The motor housing protection level is IP55, suitable for outdoor use.

Performance Parameter Table

model	impeller diameter (mm)	rotation speed (r/min)	air volume (m3/h)	Total pressure (Pa)	Current A	Voltage	Frequency HZ	Power KW	Noise dB (A)	Weight (KG)
BF-4	φ410	one thousand four hundred and fifty	four thousand and two hundred	one hundred and three	zero point eight one	three hundred and eighty	fifty	zero point two five	seventy-four	sixteen
	φ390	one thousand three hundred and eighty	four thousand and one hundred	eighty-five	zero point six three			zero point one eight		ten
BF2-4	φ410	one thousand seven hundred and forty	four thousand and two hundred	one hundred and three	zero point eight one			zero point two five		twelve
		one thousand four hundred and fifty	four thousand and five hundred	one hundred and thirty-seven			sixty			sixteen
BF-5	φ500	one thousand seven hundred and forty	five thousand and six hundred	one hundred and forty-four	one point two four		fifty	zero point four	seventy-five	seventeen
		one thousand four hundred and fifty	six thousand and two hundred	one hundred and forty-seven			sixty
BF2-5			five thousand and six hundred	one hundred and forty-four	one point one one		fifty	zero point three seven		thirteen
			seven thousand	one hundred and eighty-five	one point five			zero point five five		fourteen
		one thousand seven hundred and forty	six thousand and two hundred	one hundred and forty-seven	one point one		sixty	zero point three seven		thirteen

Appearance and installation dimensions

model	D	M	M1	S	S1	L	LB	HD	Remark
BF-4	φ410	φ105	φ65	4-M10	4-M8	three hundred	two hundred and thirty	one hundred and seventy one hundred and twenty-five
BF2-4	φ390					two hundred and twenty	one hundred and fifty-five
	φ410					three hundred	one hundred and eighty-five	one hundred and seventy