Explosion-proof & Dust-Proof Crane for Semiconductor Workshop
Custom overhead crane for sale.Explosion proof overhead crane with explosion proof & dust free design for semiconductor workshop, good design & price.
- Products: Explosion Proof Overhead Crane
- Application: semiconductor workshop
An explosion proof overhead crane is required by a client for material handling for a semiconductor workshop.
The client, who primarily manufactures semiconductor grade polysilicon, insists on a dust-free & explosion proof overhead crane design due to its special applicaiton conditions.
- Air cleanliness class: 4class, which means there are less than 10,000 particles of 0.1 micron in size per square meter, thus dust-free designed overhead crane is required.
- Due to the presence of explosive and combustible gas in the workplace, the explosion proof design is required and crane's explosion-proof rating isdIICT4 .
Main configuration of explosion proof overhead crane
The following main configuration: Fully automatic operation; main girder made of high strength alloy steel; rotation part, connecting part, and protecting part made of stainless steel; high seal explosion-proof drive mechanism; free maintenance self-lubricating type bearing; motor, reducer, brake, and electric appliance detection combined into one compact piece; automatic accurate placement for anti-sway (the positional accuracy can go to the millimeter).
High safety explosion proof overhead crane
The explosion-proof overhead crane is intended for use in flammable or explosive environments, and it often comes with an explosion-proof hoist and motor. It is commonly utilized for light-duty to moderate service in chemical workshops, petrochemical facilities, wastewater treatment plants, gas power plants, and other industrial plants.
Double girder explosion proof craneTypes of protection for your overhead canes in different applications
According to the manufacturing process and suitability for various conditions, equipment is classified into protection level categories to ensure safety in a given situation. The highest level of safety is Category 1, while the lowest is Category 3. There are numerous forms of protection, but just a few are described here
|
. Type |
Ex Code |
Description |
Standard |
Location |
Use |
|
Flameproof |
d |
Equipment construction is such that it can withstand an internal explosion and provide relief of the external pressure via flamegap(s) such as the labyrinth created by threaded fittings or machined flanges. The escaping (hot) gases must sufficiently cool down along the escape path that by the time they reach the outside of the enclosure not to be a source of ignition of the outside, potentially ignitable surroundings. Equipment has flameproof gaps (max 0.006" propane/ethylene, 0.004" acetylene/hydrogen) |
IEC/EN 60079-1 |
Zone 1 if gas group & temp. class correct |
Motors, lighting, junction boxes, electronics |
|
Increased Safety |
e |
Equipment is very robust and components are made to a high quality |
IEC/EN 60079-7 |
Zone 2 or Zone 1 |
Motors, lighting, junction boxes |
|
Oil Filled |
o |
Equipment components are completely submerged in oil |
IEC/EN 60079-6 |
Zone 2 or Zone 1 |
switchgear |
|
Sand/Powder/Quartz Filled |
q |
Equipment components are completely covered with a layer of Sand, powder or quartz |
IEC/EN 60079-5 |
Zone 2 or Zone 1 |
Electronics, telephones, chokes |
|
Encapsulated |
m |
Equipment components of the equipment are usually encased in a resin type material |
IEC/EN 60079-18 |
Zone 1 (Ex mb) or Zone 0 (Ex ma) |
Electronics (no heat) |
|
Pressurised/purged |
p |
Equipment is pressurised to a positive pressure relative to the surrounding atmosphere with air or an inert gas, thus the surrounding ignitable atmosphere can not come in contact with energized parts of the apparatus. The overpressure is monitored, maintained and controlled. |
IEC/EN 60079-2 |
Zone 1 (px or py), or zone 2 (pz) |
Analysers, motors, control boxes, computers |
|
Intrinsically safe |
i |
Any arcs or sparks in this equipment has insufficient energy (heat) to ignite a vapour Equipment can be installed in ANY housing provided to IP54. A 'Zener Barrier' or 'opto isol' or 'galvanic' unit may be used to assist with certification. A special standard for instrumentation is IEC/EN 60079-27, describing requirements for Fieldbus Intrinsically Safe Concept (FISCO) (zone 0, 1 or 2) |
IEC/EN 60079-25 IEC/EN 60079-11 IEC/EN60079-27 |
'ia': Zone 0 & 'ib': Zone 1 'ic: zone 2 |
Instrumentation, measurement, control |
|
Non Incendive |
n |
Equipment is non-incendive or non-sparking. A special standard for instrumentation is IEC/EN 60079-27, describing requirements for Fieldbus Non-Incendive Concept (FNICO) (zone 2) |
IEC/EN 60079-15 IEC/EN 60079-27 |
Zone 2 |
Motors, lighting, junction boxes, electronic equipment |
|
Special Protection |
s |
This method, being by definition special, has no specific rules. In effect it is any method which can be shown to have the required degree of safety in use. Much early equipment having Ex s protection was designed with encapsulation and this has now been incorporated into IEC 60079-18 [Ex m]. Ex s is a coding referenced in IEC 60079-0. The use of EPL and ATEX Category directly is an alternative for “s” marking. The IEC standard EN 60079-33 is made public and is expected to become effective soon, so that the normal Ex certification will also be possible for Ex-s |
IEC/EN 60079-33 |
Zone depending upon Manufacturers Certification. |
As its certification states |
Contact us to get your customized overhead crane design now.
