DS(R) series bidirectional jet tunnel fanDetailed product description：

Scope of application:
Suitable for exhaust systems in industries such as subways, highways, mines, and railway tunnels.

Main features:
Low energy consumption, high thrust, specially designed muffler. Bidirectional ventilation equipment, with the same forward and reverse airflow speeds, can achieve reverse airflow by simply changing the motor rotation direction.

Performance parameter table:

Fan Model	Air volume	Export Wind speed	motor		Without silencer		Equipped with muffler
			frame size	power	thrust	sound pressure	1D			2D
							thrust	sound pressure	sound power	thrust	sound pressure
	mthree/s	m/s		KW	N	dB(A)	N	dB(A)	KW	N	dB(A)
SDS(R)-6.3-2P-4-18°	eight point nine	twenty-eight point five	one hundred and thirty-two	seven point five	three hundred and three	seventy-nine	two hundred and eighty-nine	seventy	ninety-eight	two hundred and seventy-four	sixty-six
SDS(R)-6.3-2P-4-21°	nine point five	twenty-nine	one hundred and sixty	eleven	three hundred and forty-six	eighty	three hundred and thirty	seventy-one	ninety-nine	three hundred and twelve	sixty-seven
SDS(R)-6.3-2P-4-24°	ten point two	thirty-two point eight	one hundred and sixty	eleven	three hundred and ninety-one	eighty	three hundred and seventy-one	seventy-one	ninety-nine	three hundred and sixty-three	sixty-seven
SDS(R)-6.3-2P-4-27°	ten point five	thirty-three point seven	one hundred and sixty	fifteen	four hundred and thirteen	eighty-one	four hundred and nine	seventy-two	one hundred	four hundred and one	sixty-eight
SDS(R)-6.3-2P-4-30°	eleven point four	thirty-six point five	one hundred and sixty	fifteen	four hundred and ninety-five	eighty-two	four hundred and eighty-two	seventy-three	one hundred and one	four hundred and seventy	sixty-nine
SDS(R)-6.3-2P-4-33°	twelve point three	thirty-nine point four	one hundred and sixty	eighteen point five	five hundred and sixty-six	eighty-three	five hundred and sixty	seventy-four	one hundred and two	five hundred and forty-nine	seventy
SDS(R)-7.1-2P-6-18°	thirteen	thirty-two point eight	one hundred and sixty	fifteen	four hundred and ninety-seven	eighty-three	four hundred and eighty-one	seventy-three	one hundred and one	four hundred and sixty	seventy
SDS(R)-7.1-2P-6-21°	fourteen point two	thirty-five point eight	one hundred and sixty	eighteen point five	five hundred and seventy-eight	eighty-four	five hundred and sixty-seven	seventy-four	one hundred and two	five hundred and forty-nine	seventy-one
SDS(R)-7.1-2P-6-24°	fourteen point nine	thirty-seven point six	one hundred and eighty	twenty-two	six hundred and twenty-six	eighty-five	six hundred and twenty	seventy-five	one hundred and three	six hundred and seven	seventy-three
SDS(R)-7.1-2P-6-27°	fifteen point five	thirty-nine point two	two hundred	thirty	seven hundred and eleven	eighty-five	seven hundred and four	seventy-six	one hundred and four	six hundred and ninety	seventy-three
SDS(R)-7.1-2P-6-30°	sixteen point five	forty-one point six	two hundred	thirty	eight hundred and two	eighty-six	seven hundred and ninety-four	seventy-seven	one hundred and five	seven hundred and seventy-eight	seventy-four
SDS(R)-7.1-2P-6-33°	seventeen point five	forty-four point one	two hundred	thirty-seven	nine hundred and two	eighty-seven	eight hundred and ninety-three	seventy-eight	one hundred and six	eight hundred and seventy-five	seventy-five
SDS(R)-8-4P-6-18°	nine point one	eighteen	one hundred and twelve	one	one hundred and ninety-one	sixty-six	one hundred and eighty-nine	fifty-six	eighty-four	one hundred and eighty-six	fifty-two
SDS(R)-8-4P-6-21°	ten point six	twenty-one point two	one hundred and thirty-two	five point five	two hundred and forty-four	sixty-eight	two hundred and forty-two	fifty-eight	eighty-six	two hundred and thirty-seven	fifty-four
SDS(R)-8-4P-6-24°	eleven point five	twenty-two point eight	one hundred and thirty-two	seven point five	three hundred and six	sixty-nine	three hundred and two	fifty-nine	eighty-seven	two hundred and ninety-six	fifty-six
SDS(R)-8-4P-8-27°	twelve point two	twenty-four point three	one hundred and thirty-two	seven point five	three hundred and forty-six	seventy	three hundred and forty-two	sixty	eighty-eight	three hundred and thirty-five	fifty-seven
SDS(R)-8-4P-8-30°	fourteen point one	twenty-eight	one hundred and sixty	eleven	four hundred and fifty-three	seventy-two	four hundred and forty-eight	sixty-two	ninety	four hundred and twenty-one	fifty-nine
SDS(R)-8-4P-8-33°	fourteen point seven	twenty-nine point three	one hundred and sixty	fifteen	four hundred and eighty-six	seventy-three	four hundred and sixty-one	sixty-three	ninety-one	four hundred and forty-eight	sixty
SDS(R)-9-4P-6-18°	fourteen point one	twenty-two point two	one hundred and sixty	eleven	three hundred and sixty-seven	seventy-one	three hundred and sixty-four	sixty-one	eighty-nine	three hundred and fifty-six	fifty-seven
SDS(R)-9-4P-6-21°	fifteen point six	twenty-four point five	one hundred and sixty	eleven	four hundred and forty-eight	seventy-three	four hundred and forty-four	sixty-four	ninety-two	four hundred and thirty-five	sixty
SDS(R)-9-4P-6-24°	sixteen point two	twenty-five point five	one hundred and sixty	eleven	four hundred and eighty-one	seventy-three	four hundred and seventy-six	sixty-four	ninety-two	four hundred and sixty-six	sixty-one
SDS(R)-9-4P-8-27°	eighteen point eight	twenty-nine point five	one hundred and sixty	fifteen	six hundred and thirty-six	seventy-four	six hundred and twenty-nine	sixty-five	ninety-three	six hundred and sixteen	sixty-one
SDS(R)-9-4P-8-30°	nineteen point seven	thirty-one	one hundred and eighty	eighteen point five	six hundred and ninety-nine	seventy-five	six hundred and ninety-two	sixty-six	ninety-four	six hundred and seventy-eight	sixty-three
SDS(R)-9-4P-8-33°	twenty-one point five	thirty-three point eight	one hundred and eighty	twenty-two	seven hundred and eighty-six	seventy-six	seven hundred and seventy	sixty-seven	ninety-five	seven hundred and fifty-four	sixty-three
SDS(R)-10-4P-6-18°	seven point one	twenty-one point eight	one hundred and sixty	eleven	four hundred and thirty-eight	seventy-four	four hundred and thirty-three	sixty-four	ninety-two	four hundred and twenty-five	sixty-one
SDS(R)-10-4P-6-21°	nineteen	twenty-four point three	one hundred and sixty	fifteen	five hundred and forty	seventy-five	five hundred and thirty-five	sixty-five	ninety-three	five hundred and twenty-four	sixty-two
SDS(R)-10-4P-6-24°	twenty point eight	twenty-six point five	one hundred and sixty	fifteen	six hundred and thirty	seventy-six	six hundred and twenty-four	sixty-seven	ninety-five	six hundred and eleven	sixty-four
SDS(R)-10-4P-8-27°	twenty-two point five	twenty-eight point six	one hundred and eighty	eighteen point five	seven hundred and fifty-two	forty-four	seven hundred and forty-five	sixty-eight	ninety-six	seven hundred and thirty	sixty-five
SDS(R)-10-4P-8-30°	twenty-four point three	thirty-one	one hundred and eighty	twenty-two	eight hundred and thirty-one	seventy-eight	eight hundred and twenty-two	seventy	ninety-eight	eight hundred and six	sixty-six
SDS(R)-10-4P-8-33°	twenty-six point five	thirty-three point eight	two hundred	thirty	one thousand and eleven	seventy-nine	one thousand and one	seventy	ninety-eight	nine hundred and eighty-one	sixty-six
SDS(R)-11.2-4P-6-18°	twenty-four point one	twenty-four point four	one hundred and eighty	eighteen point five	six hundred and ninety-nine	seventy-eight	six hundred and eighty-two	sixty-nine	ninety-seven	six hundred and sixty-eight	sixty-five
SDS(R)-11.2-4P-6-21°	thirty	thirty point five	one hundred and eighty	twenty-two	one thousand and five	seventy-nine	nine hundred and eighty-five	seventy	ninety-eight	nine hundred and forty-one	sixty-seven
SDS(R)-11.2-4P-6-24°	thirty point five	thirty-one	two hundred	thirty	one thousand one hundred and thirty	eighty	one thousand one hundred and twenty	seventy-one	ninety-nine	nine hundred and eighty-one	sixty-eight
SDS(R)-11.2-4P-6-27°	thirty-three point five	thirty-four	two hundred and twenty-five	thirty-seven	one thousand one hundred and ninety-eight	eighty-one	one thousand one hundred and eighty	seventy-two	one hundred	one thousand one hundred and sixty-one	sixty-nine
SDS(R)-11.2-4P-6-30°	thirty-four point five	thirty-five	two hundred and twenty-five	forty-five	one thousand three hundred and eighty	eighty-two	one thousand three hundred and fifty	seventy-four	one hundred and two	one thousand three hundred and eighteen	seventy
SDS(R)-11.2-4P-8-33°	thirty-six point three	thirty-six point nine	two hundred and fifty	fifty-five	one thousand five hundred and ninety	eighty-three	one thousand five hundred and fifty	seventy-five	one hundred and three	one thousand five hundred and nineteen	seventy-one