Explosion Proof Hoist
Ideal for hazardous environments, these explosion proof hoist products are specifically designed to meet electrical standards required in hazardous or classified manufacturing and processing areas. David Round also makes explosion proof wire rope hoists.
Explosion-Proof/Dust Ignition-Proof
Featuring NEMA 7 or NEMA 9 enclosures, pendants and fittings as well as explosion-proof rated motors as required, EPC-Series electric explosion proof chain hoist products are intended for H-4 operation in Class I environments with flammable gasses and vapors and Class II locations where combustible dust is present. Units are further configured for use in eihter Division I or II rated facilties.
Spark-Resistant Hoist Features
To further reduce the likelihood of inadvertent sparking during normal lifting operations, all EPC Series explosion proof hoist products include spark-resistant features. Each EPC-Series hoist is supplied with rubber bumpers in addition to stainless Steel trolley wheels, load chain, bottom block and hook.
Standard Features of Explosion Proof Hoist Products
Spark-resistant components
- Stainless Steel trolley wheels
- Stainless Steel load chain
- Stainless Steel bottom block
- Stainless Steel safety hook
- Rubber bumpers
Universal trolley wheels for flat/tapered flange beams
Sealed gearing with oil bath lubrication
Upper/lower hook position limit switch
Reversing single speed controls for hoist and trolley
Automatic electric hoist brake
Stainless Steel chain container
Lug mounted
230/460 Volts - 60 Hz - 3 Phase
Options
Epoxy paint
Variable speed operation with AC inverter
Push or motorized trolley
Trolley soft start
Trolley brake
Mainline contactor
Corrosion-resistant components
All stainless Steel hoist designs
Low-headroom versions
Long-lift units
Rail sweeps/restraining lugs
Articulating trolleys
Tractor drives
| Environment | Description | Enclosures | Pendant | Motors | Brakes |
|---|---|---|---|---|---|
| Class I / Division I |
Hazardous concentrations of flammable gasses or vapors exist | NEMA 7 | NEMA 7 | Explosion-Proof | Hazardous Location - Div. I |
| Class I / Division II |
Volatile flammable liquids or gasses are normally confined | NEMA 7 | NEMA 7 or Intrinsically safe | Explosion-Proof or TENV/TEFC | Hazardous Location - Div. II |
| Class II / Division I |
Ignitable amounts of hazardous dust present in atmosphere | NEMA 9 | NEMA 9 | Explosion-Proof | Hazardous Location - Div. I |
| Class II / Division II |
Electrically conductive dust present in atmosphere | NEMA 9 | NEMA 9 or Intrinsically safe | Explosion-Proof or TENV/TEFC | Hazardous Location - Div. I |
Explosion Proof Hoist Product Literature
David Round manufactures both explosion proof and dust ignition proof apparatus as specified by David Round's inpretation of Articles 500-504 of the National Electric Code (2002). However, it is the customer's responsibility to determine the class, division and group for each hoisting application and to ensure that each David Round product intended for use in a hazardous environment specifically meets the requirements for the intended area of use prior to installation and operation.
