The J D Neuhaus extensive range of handling equipment, including hoists and cranes are all engineered for extremes, particularly for operations in dust laden atmospheres or other explosion-hazardous areas such as the chemical manufacture and processing environments. All the JDN products, which include both compressed air and hydraulically operated units are Explosion Protected as Standard.
This ensures that all their products are safe for continuous and long-term operation in potentially explosive chemical atmospheres as well as the more insidiously dangerous conditions where high levels of airborne dusts exist. This can include combustible dusts, high concentrations of airborne dusts, or wherever a dust cloud is confined with an oxidant present (ie typically atmospheric oxygen) and particularly where there is an ignition source. The oxidation of other commonly known materials such as coal and sawdust can also be the source of a dust explosion. However, many other normally inactive materials such as grain, flour, sugar, powdered milk and even powdered metals can form potentially explosive dust cloud suspensions in a busy working atmosphere.
Their Profi TI range of air operated hoists includes a total of 19 models providing lift capacities from 250kg up to an impressive 100 tonnes. These incorporate many years of design and development, and have successfully proved their versatility and universal reliability following installations within a wide range of light, medium and heavy duty industrial workplaces. Their compressed air power supply is also utilised for control functions. It does not initiate sparks, so providing an unbeatable advantage when hoists are operating in potentially explosive atmospheres. Even greater safety can be achieved by the prevention of sparks generated by static discharges or metal to metal friction contacts.
Standard versions of JDN hoists and crane systems (which utilise Profi TI hoists for lift operations) have the explosion protection / classifications and markings EX II 2 GD IIA T4 / II 3 GD IIB T4.
Increased spark protection can be achieved, which involves copper galvanisation plating of the hoist bottom block and load hooks, together with fitting brass safety catches to achieve a rating of
EX II 2 GD IIB T4.
With even further increased spark protection for explosion group IIC, the hoist horizontal movement trolleys incorporate running wheels and travel gearing which are manufactured in bronze for an impressive EX II 2 GD IIC T4 rating.
The Profi TI hoist range is the workhorse of the industrial and commercial world, and the operating air supply can be set at 4 or 6 bar pressure, with a standard load lift height of three metres being provided throughout. Other optional lift height requirements can also be specified and accommodated as required.
All Profi TI hoists are equipped with a top suspension hook, with optional overhead trolleys also available to accommodate lateral movement of suspended loads. Three trolley options incorporate load traverse movements combined with precise load placements. One trolley is manually operated for horizontal movement of the suspended load. A second trolley has a manually operated reel chain mechanism for lateral load movements. The third motorised trolley provides traverse as well as load raise and lower movements, together with precise load positioning, utilising compressed air power.
All trolley systems can negotiate overhead rail curvatures. The motor trolleys and can also be fitted with rack and pinion drives for safe load handling on offshore platforms and sea going vessels. For installations with overhead space constrictions, a low headroom trolley option is also available, suitable for loads up to six tonne.
The easy to use range of Profi TI hoists are 100% duty rated with unlimited duty cycles, so minimising any downtime conditions. Their compact modern design eliminates any protruding control hoses or similar external parts susceptible to damage, emphasising the suitability of the Profi range for even horizontal pulling. These standard hoists are also insensitive to atmospheric dust or humidity and can withstand working temperatures ranging from 20°C to +70°C. Their patented, low maintenance vane motor brake systems ensure fail-safe starting and positive braking, while also being low maintenance as well as suitable for lube-free operation. Various pendant controls can be fitted for sensitive, single speed, multi-function or remote control operation. These design-led hoists also provide strong, fast and silent operation combined with high performance efficiency and greater reliability to ensure high lifting and lowering speeds while incorporating positive sound absorption.
The compact hoist designs ensure minimum product dead-weight, together with suitability for installation in low headroom conditions. When operating with loads from one tonne upwards overload protection is also incorporated as standard.
For less severe operations the JDN mini hoist range is ideal for light – medium lifting requirements. These cover four models for individual lift capacities of 125/250/500 and 980kg, with manipulator variations available for single handed operation during lift/lower/traverse and even final load positioning operations.
Hydraulically operated versions of the JDN Profi range can also be made available, together with hoists specifically designated for operation within unique working conditions. These include JDN Profi 25 TI hoists, available with compressed air or hydraulic fluid operation, which are suitable for work undertaken in fully submersed conditions. These subsea hoists provide possibilities of enhanced weightless underwater movements of suspended loads which has included the replacement of a 45 tonne replacement rudder blade for a cargo ship while remaining berthed at sea.
Overhead monorail air hoists having air or hydraulic drives can also be supplied with 11 models in the range covering lift capacities from 10 to 100 tonnes. Further ultra low headroom versions are also available for lifting operation up to 100 tonnes with specialised products available for offshore BOP handling as well as specialised lifting in cryogenic conditions down to -45°C.
Full crane systems together with self assembly crane kits are also available for onshore/offshore operations with optional compressed air/hydraulic drives. These products can be supplied to suit individual customer requirements including jib cranes, plus top running and underhung overhead travelling cranes.