Cooper Crouse-Hinds EYS3 EYS Conduit Sealing Fitting

Overview

The Cooper Crouse-Hinds EYS3 is a 1" female threaded (FNPT) explosionproof conduit sealing fitting engineered to block the passage of gases, vapors, and flames through conduit systems installed in hazardous industrial environments. Built from ductile iron and Feraloy iron alloy, the EYS3 is part of the long-established EYS/EZS conduit sealing fitting family from Eaton’s Crouse-Hinds series, and is specifically rated for vertical-only installation with a Group B special feature rating, making it a critical safety component wherever rigid or IMC conduit crosses between hazardous and non-hazardous areas, or between rooms of differing gas group classification.

As the official authorized partner and exclusive regional representative for Cooper Crouse-Hinds, Seven Star LLC proudly supplies the EYS3 conduit sealing fitting to oil and gas, petrochemical, and industrial process facilities across Oman and the wider GCC. Every unit shipped from our warehouse is genuine Crouse-Hinds product with full manufacturer traceability, backed by our technical team’s support for hazardous-area conduit seal specification, sizing, and compliant installation across the Sultanate of Oman.

Sealing Principle

The Cooper Crouse-Hinds EYS3 functions as a mechanical barrier that, once packed with fiber and filled with sealing compound at installation, cures into a solid plug inside the fitting body. This plug physically obstructs the free passage of flammable gases or vapors that could otherwise migrate along the conduit interior from an ignition source in one classified area into an adjacent space, whether that space is a different hazardous group, a different division, or an ordinary (non-classified) location. The internal 3-3/4 cubic inch chamber and 2-3/8 in turning radius give installers sufficient working volume to properly pack and pour the seal without disturbing the surrounding conductor insulation.

Because the EYS3 is rated vertical-only, correct orientation during Cooper Crouse-Hinds EYS3 installation is essential to the integrity of the seal – the sealing compound must be poured and allowed to cure with gravity working in the fitting’s favor, ensuring a uniform, void-free plug. The result is a fitting that carries no moving parts, requires no field adjustment after cure, and provides a permanent explosionproof and dust-ignitionproof boundary rated for continuous duty in Class I, Division 1 and 2, Groups B, C and D atmospheres.

Engineering Design of the Cooper Crouse-Hinds EYS3

The Cooper Crouse-Hinds EYS3 body is cast from ductile iron and Feraloy iron alloy, finished in aluminum acrylic paint or electro-galvanized coating for corrosion resistance in coastal and humid GCC environments, including offshore platforms and coastal refineries around Sohar and Salalah. The fitting presents a 1" female NPT hub on a compact 1.75 in x 1.75 in x 4.31 in envelope, weighing approximately 1.98 lb, allowing it to be installed directly in-line on rigid or IMC conduit runs without additional support hardware in most applications.

A threaded plug port on the fitting body accepts the sealing fiber dam and compound during commissioning, and the fitting’s integral bushing allows straightforward access for field technicians performing seal pours or re-certification inspections. The EYS3’s machined mating flanges and threaded hub ensure flame-path tightness is maintained across the full assembly, meeting the tight tolerance requirements mandated by UL 1203 for explosionproof enclosures and fittings used in Class I and Class II hazardous locations.

Key Features

Every Cooper Crouse-Hinds EYS3 unit delivers dependable explosion containment engineered for demanding hazardous-area conduit runs:

• 1" female NPT (FNPT) threaded connection for direct in-line installation on rigid or IMC conduit systems.
• Ductile iron and Feraloy iron alloy body construction for high mechanical strength and corrosion resistance.
• Vertical-only sealing orientation ensures a uniform, void-free compound plug after cure.
• Rated for Class I, Division 1 and 2, Groups B, C and D and Class II, Division 1 and 2 hazardous locations.
• UL 1203 listed and CSA C22.2 No. 30 certified for explosionproof and dust-ignitionproof service.
• Compact 1.75 in x 1.75 in x 4.31 in body with 3-3/4 cubic inch internal sealing chamber.
• Integral bushing and threaded plug port simplify fiber packing and compound pouring during commissioning.
• Electro-galvanized or aluminum acrylic painted finish suited to humid, coastal, and offshore GCC installations.

Industrial Applications

The Cooper Crouse-Hinds EYS3 conduit sealing fitting is specified, and Cooper Crouse-Hinds EYS3 fittings are stocked regionally, wherever hazardous-area conduit systems cross classification boundaries: oil and gas production and gathering stations, refinery process units, offshore and onshore petrochemical plants, gasoline bulk loading terminals, grain handling and processing facilities, and any wet or corrosive-atmosphere installation requiring a certified explosionproof conduit seal. In Oman’s upstream and midstream oil and gas sector, EYS3 fittings are routinely installed at motor control center entries, junction box transitions, and panel feeds throughout Class I Division 1 and 2 process areas.

As the officially authorized partner for Cooper Crouse-Hinds, Seven Star LLC distributes the EYS3 to EPC contractors, MEP consultants, and plant maintenance teams across Muscat, Sohar, and the Salalah free zone, supporting new-build hazardous-area electrical installations as well as turnaround and shutdown maintenance programs where conduit seals must be replaced or re-certified. Our regional stock holding and direct manufacturer relationship mean shorter lead times than sourcing individually from overseas distributors, with full datasheet and certification support available on request for Oman and GCC regulatory submissions.

Technical Specifications

Key specifications for the Cooper Crouse-Hinds EYS3 conduit sealing fitting, model Cooper Crouse-Hinds EYS3,:

Call To Action

Seven Star LLC stocks and supplies the Cooper Crouse-Hinds EYS3 (Cooper Crouse-Hinds EYS3) conduit sealing fitting for immediate quotation and regional delivery across Oman and the GCC. As the authorized partner for Cooper Crouse-Hinds in Oman and the GCC, we support formal RFQ submissions, provide regional warehouse stock to minimize project lead times, and offer full technical datasheets for download on request. Contact our instrumentation and hazardous-area electrical division today for pricing, lead time, and compliance documentation for your EYS3 requirement.