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ATEX and IEC Ex Flame-proof Explosion Proof Lighting & Equipment
Explosion Proof Lights
Explosion Proof Motors - Motors for Hazardous Locations
Industrial and Vaporproof Emergency Failsafe Lighting
Industrial Cord Reels and Tool Taps
Industrial Work Area Heaters
Machine Vision Lights
Megatower™
QC Series Industrial Portable Lighting - Quick Change Mount
Rig Lights
Stadium lights
String Lights and Temporary Light Stringers
Tank Cleaning Lights
Three Phase Motor Soft Starters
Vapor Proof LED Lights
Variable Frequency Drives (VFDs)
Vehicle Mounting Plates
Workboat Light Fixtures & Lighting Equipment
Yacht Engine Room Lights
Color Changing LED RGB Lighting
Explosion Proof Cord Reels
GOLIGHT Spotlights
Larson FUTURE - Lease Lighting
Remote Area Lighting and Scene Lights
Utility Bucket Mount, Receiver Hitch & Trailer Mount Lighting
Aevum Control Lighting and Equipment - IIoT
Butane and Solvent Extraction Room Lighting and Equipment
DC to DC Transformers and Power Supplies
Explosion Proof Fans & Blowers
Explosion Proof Paint Spray Booth Approved Lights
Explosion Proof String Lights
Explosion Proof Switchgear & Controls
Fleet Service Lights and Lighting Equipment
Industrial Equipment Trailers
Industrial Handlamps & Droplights
ISO 14644/FS-209E Clean Room Lighting
LED Blasting Lights
Night Time Fishing Lights
Portable AC Power Supply Units
Portable Power Distribution Panels
Power Distribution Panels with KVA Transformers
Self-Contained Lighting
Service Pit Lighting
Solar Generators & Solar Powered Lighting
Agricultural Farm Equipment Lighting & Beacons
Explosion Proof Cameras & Surveillance Systems
Explosion Proof Emergency Lights
Explosion Proof Heaters
Garage & Gas Station Canopy Lights
LED Grow Lights
LED Lights
NDT Ultraviolet Lights
Portable Hazardous Location Lighting
Radio Communication Towers and Equipment
Salt Water Processing Equipment
Shelter & Tent Lighting
Thermal Monitoring Cameras and Systems
48V LED Equipment Lights
ATEX Rated Explosion Proof Lights
Automotive Lighting
Class Rated Signals, Alarms, and Systems
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HID Equipment Lights
Hot Work Permit Lighting and Equipment
Hunting Lights
Industrial lasers
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Light Towers
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Phase Converters - Single to Three Phase
Marine Shore Power Cords and Equipment
24 Volt Military Lights
Disaster Relief / First Responders / Search & Rescue Lighting
Plastic Handcuff Key
110/120 Volt Flood Lights
Post Mount Spotlights
Magnetic Work Lights
Crank-up Light Masts
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Intrinsically Safe Lights
Military Flashlights
LED Waterproof Lanterns
Work Area Lights
12 Volt Flood Lights
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Boat Spotlights
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HID Boat Lights
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Remote Control Lights
Control Lights
Tow Lights
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NEW Lights and New Products
Evaporative Coolers
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AC/DC Transformers
Power Supplies
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Military Spotlights 24V
Infrared Filters, Covert Covers, and Blackout IR Lenses
Military Equipment
Ultralife Batteries
Remote Control Pan Tilt Base
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Larson Electronics Spotlights
Larson Electronics Parts
Replacement Lamps
Cords - Brackets
Portable Wheeled Generators
Non-Hazardous Location Extension Cords / Plugs / Outlets
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HID Work Lights
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Acro Lights HID Lights
Halogen Lights
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Acro Light Flashlight
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Powerlight Flashlight
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LED Status Lights
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Flashlight Holder
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Headlights - Headlamps - Hard Hat Lights
Flashlights
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Suction Mount Lights
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12/24 Volt Spotlights
Gifts For Men
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New 12 / 24 Volt Lights
Explosion Proof Accessories and Replacement Parts
Explosion Proof Lighting
Explosion Proof Hand Lamps (Drop Lights)
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Explosion Proof Tank Lights
Explosion Proof Phones and Intercoms
Explosion Proof Extension Cords
Black Friday & Cyber Monday Specials
Crane Lights
Explosion Proof Light Rentals
General Light Rentals
Light Tower and Light Plant Rentals
Power Distribution Rentals
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Power Plant Lighting
Refinery lights
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Food Grade Safe Lights
Film and Entertainment Lights
Handheld Meters and Devices
Waste Water Treatment Lights
Mining Lights
Ship Yard Lights
Work Site Lighting
         

   
04/03/17 Explosion Proof Lights- Glass vs. Plastic

Article - April 1, 2016 By LarsonElectronics.com

Class II Strobe Light with Motion Sensor - 110-120V AC - 54 Flashes Per Minute - 4 Color Options

Explosion Proof Lights- Glass vs. Plastic

Explosion proof lights are designed to keep hazardous work environments safe and secure. In addition to providing adequate visibility in dark areas, such products actively prevent sparks or ignitions that can cause explosions. The lighting solution can be found in establishments that deal with explosive gases such as food processing plants, offshore lighting, paint spray booths and marine work areas.

An example of a food processing facility that incorporates explosion proof lights is Koopmans Meel, located in Leeuwarden, Netherlands. The establishment specializes in industrial baking goods, and handles a range of culinary products, including wheat and flour (classified under Class II, Group G). The fixtures allow the company to meet strict HACCP standards, while avoiding issues related to changes in operating temperature, maintenance and explosive dust.

When manufacturing explosion proof lights, designers have the option to use glass or plastic to encase the fixture’s parts. Read on to find out which material is commonly used for explosion proof lighting and hazardous locations.


Sparks and Plastics

Plastics are beneficial when used for lightweight casing solutions and packaging. However, they are not usually applied in explosion proof lights. Generally speaking, the material falls into two categories: thermoplastics (polyethylene- can be melted down and remolded several times) and thermosets (urea formaldehyde- cannot be re-melted, ideal for heat resistance). The main reason why plastics are not suitable for explosion proof lights and hazardous locations is due to its poor spark-mitigating properties. Sparks, or rapid electrical discharges, can penetrate plastic easily, which increases the risk of setting off combustible dust, vapors and flammable elements in the area.

Sparks are produced when an electric field strength surpasses 4–30 kV/cm, or the dielectric field strength of air. When this happens, there is an increase in the number of free electrons and ions in the air. As a result, this temporarily forces the air to become an electrical conductor through dielectric breakdown, allowing a group of electrons to move freely in an air gap. By design, explosion proof lights prevent ignition and electrical sparks from escaping outside of the unit. The mechanisms of the fixture isolate or contain sparks within the light, where it cannot react with flammable substances. The products require superior electrical protection that can block current flows diligently, such as glass. As a mineral material, glass is equipped with incombustible features. It does not promote the spread or creation of flames during exposure to high levels of heat and electricity. Moreover, glass does not smoke or emit toxic products.


The Power of Glass

In a study conducted by Gillinder Glass, an industrial glass manufacturing company, the group compared the viability of glass and plastic (polycarbonate) under various heat and protective conditions. Scientists compared 24 samples of glass, ranging from 300 to 1,100 nanometers in thickness with eight samples of polycarbonate with the same dimensions. The groups findings included the following:

• When exposed to heat, polycarbonate has a tendency to release vapor and warp

• Glass displayed more abrasion resistance

• Glass cleaned easily, and did not scratch or chip

• Removing stains and dust from plastic resulted in scratches

When applied in hazardous locations, glass may help extend the lifespan of explosion proof lights. In industrial settings, the material (when combined with powerful resins) can withstand abrasive cleaning solutions during hose down and sterilizing sessions. Furthermore, when exposed to varying heat temperatures (for example, overhead explosion proof lights above food processing machines), glass can maintain the integral shape of the fixture. Contrary to popular belief, industrial glass is not fragile. It boasts high compressive strength, enabling to resist external pressures without noticeable damage. Glass is also extremely resistant to aggressive chemicals, even at high temperature settings. This feature is useful in plant operations that handle interactive chemicals on a daily basis.


Industrial Glass Trends

Scientists have been developing new ways to reinforce the sturdy properties of glass. Such practices have led to new trends in industrial glass manufacturing and design. In particular, blast-resistant glass is currently being used to provide extra protection for industrial equipment, buildings and electronics. “The new multilayered transparent glass could have a wide range of potential uses if it can be made strong enough to resist small-scale explosions,” said Sanjeev Khanna, a professor of mechanical and aerospace engineering at Missouri University.





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