Eaton Crouse-Hinds EYS91 Conduit Sealing Fitting - Group B
Part Number: EYS91
Quick Summary
Eaton Crouse-Hinds EYS91 conduit sealing fitting provides a robust sealing solution for hazardous-location conduit systems in industrial plants. Engineers often struggle with maintaining airtight, dust-tight, and explosion-protected connections during maintenance or retrofits, especially in harsh environments. This device meets Hazardous/Classified Locations area classifications and NEC/CEC standards, with Class I Division 1, Class I Division 2, Class II Division 1, Class II Division 2, and Class III ratings, delivering reliable protection and compliance. Its vertical or horizontal sealing capability and Group B rating offer installation flexibility and compliance confidence, while its feraloy iron alloy and ductile iron construction helps reduce corrosion and lifecycle costs. In practice, this translates to lower maintenance downtime and safer, more resilient electrical infrastructure.
Product Information
Extended Description
EYS91 Eaton Crouse-Hinds: Eaton Crouse-Hinds series EYS conduit sealing fitting, Female, Feraloy iron alloy and/or ductile iron, Vertical or horizontal, Group B rated, 3-1/2"
Product Name
Eaton Crouse-Hinds series EYS conduit sealing fitting
Catalog Number
EYS91
Product Length/Depth
7.25 in
Product Height
13.38 in
Product Width
6 in
Product Weight
15.34 lb
UPC
782274364988
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III
Sealing position
Vertical or horizontal
Gender
Female
Trade size
3-1/2"
Material
Feraloy iron alloy Ductile iron
Special features
Group B rated
Eaton Crouse-Hinds EYS91 3D drawing
Crouse-Hinds series EYS and EZS Explosionproof Conduit Sealing Fittings catalog page
EYS and EZS Explosionproof Conduit Sealing Fittings Canadian certification
EYS and EZS Explosionproof Conduit Sealing Fittings Canadian certification
IF 287 - Conduit Sealing
Eaton Specification Sheet - EYS91
Feature: Material and construction use Feraloy iron alloy and/or ductile iron. Benefit: Delivers strong mechanical strength with corrosion resistance for demanding hazardous-location environments. Application: Ideal for Class I/II and Class III installations where durability matters. Feature: Sealing position supports vertical or horizontal orientation. Benefit: Installation flexibility reduces field rework and simplifies retrofits across equipment rooms and cable-entry points. Application: Suitable for ceiling hangs, wall mounts, or panel-mounted conduits in industrial plants. Feature: 3-1/2 inch trade size and female configuration. Benefit: Compatibility with standard conduit systems speeds up procurement and installation while ensuring a tight seal. Application: Common in industrial control panels and process lines requiring reliable conduit sealing. Feature: Group B rated with NEC/CEC compliance. Benefit: Meets stringent safety and performance standards, reducing regulatory risk and supporting audits. Application: Crucial for facilities in hazardous locations handling flammable materials or vapors. Feature: Certifications and referenced documents available (IF 287, CAD drawings, catalog pages). Benefit: Speeds design validation and procurement, cuts project lead times. Application: Designers can verify fit and function using official Eaton resources during commissioning and maintenance planning.
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FAQs
Follow the IF 287 Conduit Sealing instructions and use the 3-1/2 in trade size Feraloy/ductile iron sealing assembly. Ensure correct orientation (vertical or horizontal) and proper mating with compatible conduit fittings. Reference the EYS91 datasheet and CAD drawings in the installation package for step-by-step guidance and torque recommendations.
EYS91 is approved for Hazardous/Classified Locations with NEC/CEC standards. It carries Class I Division 1 (and related) ratings, along with Class II Division 1/2 and Class III where applicable, ensuring compliance for explosions and dust environments. Canadian certification references are available in UL documentation for verification.
Yes. The EYS91 conduit sealing fitting is rated for Class I Division 1 and other hazardous-area classifications. Its Group B rating and vertical/horizontal sealing orientation provide flexible, code-compliant installation in protected enclosures and hazardous-location terminations.
The EYS91 uses Feraloy iron alloy and/or ductile iron, delivering strong mechanical strength and corrosion resistance essential for long-term service in demanding environments. This material choice supports reliable seals, reduces maintenance intervals, and enhances lifecycle cost efficiency in hazardous locations.
Official resources include 3D CAD drawings, the IF 287 installation sheet, a Crouse-Hinds catalog page, and the Eaton EYS91 specification sheet. These documents help confirm fit, orientation, and installation steps, accelerating procurement and commissioning activities.