Perchloric acid fume hood

Perchloric Acid Fume Hoods are designed particularly for the process involving the use of perchloric acid. The fume hood system has entire work surface, an inner water wash down system and built in drain trough provided for detailed cleaning of the hood interior. Perchloric acid is incompatible, and might react vigorously, with a variety of organic, flammable and combustive materials, such as wood, rubber, paper and greases. So, it's recommended only to use perchloric acid only. The formation of perchlorate may be a significant concern when using and storing perchloric acid. Perchlorate salts, also known as perchloric acid crystals, are immensely shock-sensitive and unstable, having a dangerous of explosion when unprotected to shocks and vibrations. Perchlorate salts are formed when perchloric is heated and as a result the vapours are allowed to condense onto a surface and dry. Perchlorates salt which could accumulate within the hood and ductwork system and become explosive. It requires wash down features to stop perchlorates salt buildup in hood and ductwork. The spray nozzle system is installed to allow complete flushing of all duct, hoodsurfaces, stack and exhaust fan.

Ductwork from perchloric acid hoods and exhaust systems should take the shortest path to the outside and should not mix with the other exhaust systems. The interior baffles can be removed for cleaning to stop the dangerous build-up of perchlorates. A visual check of the fume hood should be performed whenever the hood is used to make sure that the wash-down system is functioning correctly and air is being pulled into the hood. Regular cleaning of the perchloric acid fume hood is vital to make sure that build-ups of dust or material which can contain perchlorate salts don’t occur.

Technical specifications

MOC	CRCA 18G Epoxy powder coated
Stand	MS pipe, 18 G powder coated
Working table top	MS powder coated sheet covered with PP sheet
Exhaust system	Motor Blower assembly covered with GI sheet
Sash/Door	Vertical folding type
Air velocity	0.5 m/s
Noise Level	65 dBA
Glass window	Two layer toughened glass, 5 mm thickness
Adjustable height	Motor control
Make up air	Air needed to replace the air exhausted from a room by the fume hood and other ventilation devices
Face velocity	The velocity of the air passing through the work opening of the fume hood measured in the plane of the sash. Measured in feet per minute (fpm), or liters per minute
Electrical fittings	Electrical sockets and MCB switch
Illumination	Fluorescent lamp or UV lamp
Optional accessories	HEPA Filter, Caster wheels, Horizontal sash, SS 314 / SS 316 MOC, Temperature indicator, Face Velocity Meter, Airflow Indicator, Audio / Visual alarm
Power supply	220 / 230 V

Dimensions

Model No.	CFM @29″	CFM @18″	Super structure (WxHxD mm)			Worktop (WxHxD mm)			Hood opening (WxH mm)
			W	H	D	W	H	D	W	H
DGFH-90	567	354	915	1425	845	915	40	762	660	740
DGFH-120	833	521	1220	1425	845	1220		762	965	740
DGFH-150	1100	688	1525	1425	845	1525		762	1270	740
DGFH-180	1367	854	1830	1425	845	1830		762	1575	740
DGFH-240	1900	1188	2440	1425	845	2440		762	2185	740