Main Features : Internal Parts in Superior corrosion resistance steel (Equivalent to SS316L) Suitable for Air Pollution Control System, Bag Filter Machine. Features : High Reliability Unaffected by Voltage Surges. Easy Coil changes Coil lockable in 4X90 position or freely movable in between as require. Coil Housing : Epoxy Square Coil, Metallic Round Enclosure, IP-67 Flame Proof Enclosure, IP-68 Weather Proof Enclosure.