Specifications BXA3K
Honeywell BX | BX2 Series — MICRO SWITCH Explosion-Proof Limit Switches for use in Hazardous Areas:
The MICRO SWITCH BX/BX2 Series are designed for applications in hazardous or explosive environments requiring a rugged, durable switch virtually anywhere in the world. To comply with explosion-proof switching requirements, the flame path within the switch housing is designed to contain and cool escaping hot gases and fumes that could cause an explosion outside of the switch. The MICRO SWITCH BX enclosure is sealed for protection against corrosion, water, dust and oil as defined in NEMA 1, 3, 4, 6, and 13 and IP67 as defined in IEC 529. These enclosures also meet the European Hazardous Locations Designation: II 2 GD, Ex d IIC T6 Gb; 1 Ex d IIC T6 Gb; II 2 D Ex tb IIIC t85C Db. The entire series BX complies with the European Directive on Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres (94/9/EC) commonly referred to as the ATEX Directive. Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN50014 1997 and EN50018 1994.
MICRO SWITCH BX with conduit types 1/2-14NPT, 3/4-14NPT also meet the North American Hazardous Locations Designation: Class I, Groups B, C and D; Class II, Groups E, F and G and comply with UL Standard: UL 894, CSA Standard: C22.2 No. 25-1966, C22.2 No. 30-M1986. The MICRO SWITCH BX is ideal for outdoor use or in adverse environments where a combination of explosion proof plus sealing requirements are needed. To comply with explosion proof requirements the BX has flame paths within the housing, which cool exploding gases below the ignition temperature before they reach explosive gases surrounding the housing. Flame paths on the BX are (1) an extended plunger between the switch cavity and head and (2) the cover-housing threads on the front of the switch.
Regardless of where the equipment or machinery is designed, built, or installed, BX and BX2 Series products carry global agency coverage. Honeywell offers two versions of the BX series switch: the standard BX Series features an aluminum housing, while the BX2 series features a 316L stainless steel housing. The stainless steel housing adds additional resistance against corrosion in applications exposed to aggressive, caustic agents, as well as those often present in chemical processing plants, off-shore/near-shore sites, and other hazardous areas. Both products are weather sealed for outdoor use and designed for explosive gas/dust environments. All operating heads of the BX/BX2 Series are field adjustable at 90° increments.
Features:
Top-of-the-line environmental sealing combined with Honeywell expertise for hazardous location package design provides the right product for the right application
Exclusive teller tab on levers ensures proper torque. When the tab cannot be moved, the lever is tight enough to prevent slippage
Approvals: UL, CSA, ATEX (CE), IEC Ex, INMETRO (Brazil), NEPSI Ex (China), KOSHA (select listings - Korea), and EAC (formerly GOST-R, Russia)
Industry-leading breadth of product offering that includes: BX (aluminum housing) and BX2 (stainless steel housing) limit switches for hazardous locations
303 stainless steel operating shaft on sintered bronze bearing for enhanced mechanical life and operational reliability
Sealed to IP67, NEMA 1, 3, 4, 6, 13
Industry-leading breadth of products
Two rugged designs are available: aluminum or corrosionresistant stainless steel head and body
A diaphragm seal between head and body provides an extra measure of protection
Optional fluorocarbon seals are available for harsh chemical or higher temperature environments
Secure head-to-body retention with the head in any one of four positions 90° apart
Self-lifting pressure plate terminals saves wiring time.
Wide variety of non-sparking actuators, switch options, and head styles for design flexibility
Rotary actuated heads are field adjustable for CW actuation, CCW actuation, or both to reduce inventory
Choice of silver or gold-plated contacts
Applications:
Grain elevators
Control valves and actuators
Off-shore and on-shore drilling
Pipelines
Petrochemical and chemical plants
Water treatment plants
Paint booths
Conveyors (above-ground)
Pulp and paper
Hazardous waste handling
