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20t Double Girder Bridge Cranes, 1.Capacity:5-650t, 2.Span:5-35m, 3.Lifting height:6-100m, 4.CE,ISO,OHSAS,SGS - details see: https://www.machineto.com/20t-double-girder-bridge-crane-10195571

20t Double Girder Bridge Crane

20t Double Girder Bridge Crane, its trolley is bigger and stronger than LH type, reducer and brake separately. And this is the most important factor for working 24*7 hours per day.And this kind of heavy duty crane ,it is widely used in plants, warehouses, materials stocks to lift goods or materials.

QD type crane mainly consists of two strong bridge beams,crane travelling mechanism, electric winch trolley and electric system,and could be classified into several working duties,e.g. A5,A6,A7,according to the working frequency and pure working time.

Technical featurers

1) Strong box type,welding by machine hand.

2)Wheels,wirerope drum,gears, couplings are manufactured by our CNC manchine center, TOP quality control.

3) Heavy duty slipring motor,TOP quality in China.

4)Pendent control,wireless,cabin control.

Safety features of QD crane

1)Weight overload protection device, top quality polyurethane buffer, crane travelling limit switch,low voltage protection function, emergency stop system, current overload protection function.

2)Painting: anti-rust painting,Primer and finishing paint,yellow or red color, General thickness:about 105 microns.

3)Standard capacity: 5tons,10tons,16/3.2tons,20/5tons,32/5tons,50/10tons,75/20tons,100/20tons,100/30tons,125/30tons,150/30tons,160/32tons,200/50tons,400/80tons,560/250tons.

Warranty
14 months warranty when products leave the factory, or 12 months warranty after installation and commissioning in addition to the human damage factors.
Two years spare-parts provided for better maintenances.
Professional technical staffs provide installation, commissioning and training services.
Delivery with English user manual, parts manual, product certification and other relevant certificates.
Technical advisory for any time.

Technical parameter

QD-20/5t-22.5m-12m
Item			Lifting system		Items			Traveling system
			Main hook	Aux hook				Trolley	Crane
Lifting capacity		t	20	5	Rail distance		mm	2000	22500
Lifting speed		m/min	7	9.5	Traveling speed		m/min	38	60
Work duty			M5	M5	Work duty			M5	M5
Max lifting height		m	12	14
Power supply			380V 50Hz 3P
Drum diameter		mm	∅500	∅400	Buffer distance		mm	60	188
Motor	Model		YZR225M-8	YZR160L-8	Rail model			24 kg/m	43kg/m or QU70
	Power	KW	26	9	Wheel diameter		mm	∅350	∅600
	RPM	r/min	708	695	Max wheel load		KN	70.65	199
Reducer	Model		ZQ-650	ZQ-500	Motor	Model		YZR132M2-6	YZR160M1-6
	Ratio	i	48.57	48.57		Power	KW	4	2×6.3
						RPM	r/min	909	925
Brake	Model		YWZ400/90	YWZ-300/45	Reducer	Model		ZSC400-1	ZQ-400
						Ratio	i	32.4	31.5
					Brake	Model		YWZ-200/25	YWZ-200/25

Sketch of QD cranes with trolley

Why choose us?
1. More than 30 years' experience and 2500 employees.
2. More than 500 sets of manufacturing and inspection equipment.
3. Annual production capacity: 20000 sets
4. ALL components from famous factorie with HIGHQUALITY

Notice: As QD is customized, please confirm following information.
1. lifting capacity.
2. lifting height.(hook center to ground)
3. Power supply: Voltage.
4. Working condition: which material to lift? temprature?

Here I list our major products for your reference, please check:
1. LDA model single girder overhead crane
2. LH model double girder overhead crane.
3. MH model single girder gantry crane.
4. MG model double girder gantry crane.
5. BMH semi gantry crane.
6. BZ model pillar mounted jib crane.
7. CD/MD electric hoist.
8. Crane spare part: Wheels/Motors/Hook block/Control panel/Coiling block.