explosion proof overhead cranes which electrical explosion-proof perfor

QB Explosion Proof Overhead Cranes

Lifting Capacity: 5~75 t
Span Length: 10.5~31.5 m
Lifting Height: 6~18 m
Working Class: A4, A5
Explosion-proof Grade: ExdⅡBT4 / CT4
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Email: enquiry@cnellsen.com skype: cnellsen

Product Detail of QB Explosion Proof Overhead Cranes

Mainly consists of bridge structure, crane travelling mechanism, electric equipment etc.
All motors of QB type explosion proof overhead cranes which electrical explosion proof performance is in line with GB3836.2-2000 “for explosive gas atmospheres with explosion-proof electrical equipment-Part 2: Flameproof “d”, and the whole performance is in line with provisions of the standards of explosion-proof bridge cranes JB/T5897-1991.
The proof marks are Exd Ⅱ BT4 and Exd Ⅱ CT4.
Applied to explosion transfer capacity no higher than the II B or II C-class and the sites with explosive air mixture formed with inflammable gas (or steam) and air whose factory ignition temperature groups of not less than the T4 group.
The applicable hazardous area: 1 division or 2 division (refer to GB3836.1-2000).

Schematic diagram of QB Explosion Proof Overhead Cranes

Technical data of QB Explosion Proof Overhead Cranes

Capacity	t	5	10	20	32	50	75
Span	S(m)	10.5~31.5
Lifting height	m	6~18
Lifting speed	m/min	5	5	4.2	4.1	3	1.9
Trolley speed	m/min	19.6	20.5	20.5	20	19.1	10.5
Crane speed	m/min	22.3	22.3	19	17	19.4	15.4
Work duty		A4~A5
Explosion-proof Grade		ExdⅡBT4、ExdⅡCT4
Track type		P43	P43	P43 or QU70	QU70 or 90*90	QU80 or 100*100	QU100

Controlling Ways of QB Explosion Proof Overhead Cranes

1.Generally, ground controlling.
2.Cab controlling is also available according to customer’s requirement, working system is intermediate.
3.Operating cab: open style and close style, left or right installation.
4.Direction of entrance: side, end and top.