Explosion-protected hoists and components -
all made in-house
Potentially explosive atmospheres can occur in many branches of industry, for example in the chemical, petrochemical and biofuel industries, in oil and gas extraction, in mining, in the pharmaceutical industry as well as in the food industry and sewage sector. To prevent serious personal injury, material damage and environmental harm, most states have safety rules, laws, regulations and standards in place. Explosion protection has thus reached an advanced standard of safety worldwide.
As one of the first and for a long time also one of the only manufacturers to do so, STAHL CraneSystems has influenced the development of explosion-proof hoisting technology instrumentally since the end of the 1920s. Through own fundamental research and development, we have built up a wealth of experience that secures us a significant lead and has contributed to progress in the complete industry. Approvals from the German PTB national metrology institute and other national and international test institutes as well as worldwide certifications underline the special position of STAHL CraneSystems in this field.
Apart from the largest and most comprehensive product range that fulfils German safety and European ATEX regulations, and is certified according to the international IECEx standard, our portfolio comprises and extensive range of services from consulting and engineering to country-specific management of approval and certification procedures.
These pages only give an insight into the European directives on explosion protection, which, however, largely correspond to the international IECEx regulations. They are no substitute for intensive consideration of the requirements of applicable national laws and standards.
You can find detailed information in our brochure Expertise in Explosion Protection.
- International specialist for explosion-proof hoisting and crane technology
- Own R&D and fundamental research
- All hoisting and crane technology as well as additional equipment available in explosion-proof design to ATEX and IECEx
- Engineering for explosion-proof custom solutions
- Assistance in country-specific approval and certification procedures
The type of protection of all wheels is constructional safety ›c‹. If travel speeds are high, this also includes brass wheels.
Rope Guide/Chain Guide
The wear-resistant rope guide in nodular graphite casting GJS (previously designated GGG) is extremely durable and not subject to temperature limitations. The same applies to the chain guide, type of protection used: constructional safety ›c‹.
The types of protection of the gear are constructional safety ›c‹ and liquid immersion ›k‹. The protective liquid (oil) prevents sparks.
Equipotential bonding is essential for avoiding incendive sparks when installing crane technology in potentially explosive atmospheres.
The overload cut-off operates with a dual channel load sensor supplying analog signals. Various sensors are used depending on reeving (LCD, LSD).
The type of protection for panel boxes for Zone 1, 2 and 21 on cranes and hoists combines types of protection flameproof enclosure ›d‹, increased safety ›e‹ and protection by housing ›tD‹.
Indirect cable entry, very high safety level from type of protection increased safety ›e‹ and flameproof enclosure ›d‹. Connection of the Ex e connection box to Ex d by post-type bushing.
Motors for Zone 1 and 21 are made of grey cast iron, the type of protection combines flameproof enclosure ›d‹, increased safety ›e‹ and protection by housing ›tD‹. For Zone 2 the motors are made of aluminium and in type of protection non-sparking equipment ›nA‹. For Zone 22 the motors are manufactured in IP 66 and protection by housing ›tD‹.
The SWH 5 Ex control pendants are designed specifically to control hoists and cranes in potentially explosive environments. The two-stage SWH Ex control pendant with IP 66 protection is used for explosion-proof wire rope hoists for Zone 1.
Gear Limit Switch
The protection class of the gear limit switch is IP 66. The elements installed are protected by flameproof enclosure ›d‹, the housing by increased safety ›e‹.
Bottom Hook Block
The type of protection employed is constructional safety ›c‹, no aluminium is used. If travel speeds are high, individual parts, such as the load hook, are bronze-coated.