Product category:
Cranes, hoists, winches, chains and ancillaries
News Release from: JD Neuhaus | Subject: Cranes
Edited by the Manufacturingtalk Editorial
Team on 31 May 2001
Cranes work in hazardous environments
Cranes designed for safe operation, in the chemical industry or wherever the lifting or transportation of loads in hazardous atmospheres are envisaged, can be supplied by J D Neuhaus.
Cranes designed for safe operation, in the chemical industry or wherever the lifting or transportation of loads in hazardous atmospheres are envisaged, can be supplied by J D Neuhaus Slewing jib cranes for work handling on a few metres radius can be supplied, together with overhead travelling cranes
This article was originally published on Manufacturingtalk on 3 May 2004 at 8.00am (UK)
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Travelling cranes designed for hazardous usage
Three overhead travelling cranes have been for use in a coating line are fitted with twin air operated synchronised chain hoists and are for use in potentially hazardous atmospheres.
Air-powered hoists suit big-bag handling
Twin Profi 2 Ti air-operated hoists from JD Neuhaus have been used to facilitate safe and efficient product discharge from big-bag containers.
These can be supplied to cover up to 30 metre spans, suitable for loads up to 10 tonnes accommodated with single girder designs, and up to 50 tonnes possible on double girder cranes.
Where required, suspension cranes can also be supplied.
As for standard overhead cranes these can be fitted with double hoists and are suitable for loads up to 10 tonnes and spans of 12m.
Further reading
Air-operated hoists make tank-cleaning safer
J D Neuhaus air-operated hoists, featuring precise load positioning control via pendant hand controllers, have been successfully trialled for cleaning operations on road and rail-transit tankers.
Air hoists meet food industry hygiene standards
J D Neuhaus is now supplying air hoist products to comply with the cleaning and hygiene levels for food industry installations and withstand wash down conditions.
The pneumatic drives utilised by these cranes are fed with compressed air which is processed in a non-hazardous area remote from the operating site.
This ensures that hoists, trolleys and complete crane installations in standard form can be used in hazardous areas (Zones 1 and 2 as well as Zones 21 and 22), corresponding to classification EXGD 11B T4.
In conditions of increased explosion hazard (Zone 1), then 'spark proof' variations can also be supplied corresponding to EX2GD 11C T6.
Any components at risk of friction and contact are manufactured from suitably inert materials which include the prevention of dangerous sparking from electrostatic discharge.
The design is such that even in the event of operating defects, temperatures would remain below 85degC, cold enough for class T6 deployment.
As distinct from electric motor operation no additional protective measures are required for hazardous area operation.
High duty cycling also poses no problems as overheating is eliminated by the automatic cooling effect of expanding compressed air from the air motors.
The pneumatic drives can also be safely used in hazardous and wet areas, at temperatures from -20deg to +70degC in conditions of high humidity, steam or fumes as well as dusty and corrosive atmospheres.
Optional drive controls can be supplied including single or two speed together with infinitely variable speeds for sensitive or precise load handling.
For remote handling, explosion proof remote radio controls are available to complement the in-built pneumatic system controls.
All cranes are fitted with pendant controls for three axis movement, together with a wide range of safety devices for overtravel, emergency shut-off, overloading, collision control etc.
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