Thomas & Betts EYS51-TB Conduit Sealing Fitting

The Thomas & Betts EYS51-TB Conduit Sealing Fitting delivers explosion‑proof sealing for 1-1/2 in NPT rigid conduit, blocking the passage of gases, vapors, and flames while limiting pressure buildup in hazardous locations. It is used in Class I, II, and III environments—oil and gas facilities, chemical plants, refineries, grain handling operations, and power generation sites—and supports vertical or horizontal installations with threaded female hubs for RMC and IMC conduit. Maintenance electricians, industrial contractors, OEM manufacturers, and system integrators use this sealing fitting for new installations, hazardous area retrofits, conduit maintenance, and replacement of existing conduit seals. Constructed with a ductile iron body, gray iron plug, and steel nipple, the finish is zinc-plated with aluminum acrylic paint for corrosion resistance. Its design features include a minimum of five full threads for secure sealing, an integral bushing to protect conductors, and a large access opening to facilitate packing sealing compound. It accommodates approved sealing compounds such as Crouse-Hinds Chico A or Chico X Fiber (or approved equivalents) and carries certifications to UL 1203 and CSA C22.2 No. 30, with RoHS compliance; hazardous location ratings cover Class I, Division 1 & 2, Groups C & D; Class II, Division 1, Groups E, F & G; Class III, including explosion-proof and dust-ignition-proof conditions. Common replacements include EYS41-TB, EYS61-TB, and EYS71-TB.