Brand:

Cooper Crouse-Hinds EYS1/EZS1 ATEX Conduit Sealing Fittings

Description

Overview

The Cooper Crouse-Hinds (Eaton) EYS and EZS Series conduit sealing fittings are explosionproof/flameproof seals engineered to stop the propagation of an internal explosion along a conduit run in Zone 1 and Zone 2 hazardous locations. The EYS1 (vertical or horizontal mounting) and EZS1 (any-angle mounting) restrict the passage of gases, vapors and flames from one section of an electrical installation to another, and they limit the pre-compression, or “pressure piling,” that can otherwise build inside a conduit system during a fault event. Certified to Ex II 2 G Ex d IIC under EC-type examination certificate LOM 03 ATEX 2108, and rated IP67 per EN 60529, these fittings are a core part of any Ex d conduit-and-wiring installation feeding motors, junction boxes, luminaires or instrumentation in refineries, gas plants, offshore platforms and petrochemical facilities.

Seven Star LLC supplies the EYS and EZS Series as an authorized regional partner for Cooper Crouse-Hinds (Eaton) equipment across Oman and the wider GCC. For EPC contractors and plant maintenance teams in Muscat, Sohar, Duqm and Salalah, having a locally stocked, certificate-matched sealing fitting on hand removes a common cause of hazardous-area installation delay – waiting on an overseas shipment for a single conduit seal. Our technical team can confirm the correct EYS or EZS size and hub configuration against your conduit schedule and Ex certificate of conformity before you order.

Measurement and Operating Principle

An EYS1 or EZS1 fitting does not measure a process variable; it performs a passive explosion-isolation function within the conduit and cabling system. The fitting body has one or more threaded hub openings sized to the conduit or cable entry, and an open top through which an installer packs fiber damming material around the conductors and then pours a two-part sealing compound. Once cured, the compound forms a solid, gas-tight plug that occupies the full internal cross-section of the fitting. Should an explosive gas mixture inside the conduit be ignited by an internal arc or spark, the seal contains and cools the resulting flame front and expanding gases before they can travel onward through the conduit to a non-hazardous area or to another enclosure containing a different explosive atmosphere.

The distinction between the EYS and EZS bodies lies in mounting orientation, not sealing principle. EYS and EYSA fittings are intended for installation in either the vertical position only, or in both horizontal and vertical positions, depending on the specific catalog variant, while EZS fittings are designed for installation at any angle – the cover opening used to pour the compound can be rotated and positioned correctly regardless of how the conduit run approaches the fitting. Both series use integral bushings inside the conduit hubs to protect conductor insulation from abrasion, and taper-tapped hub threads to maintain reliable ground continuity across the joint, which is essential for equipotential bonding in a classified area.

Engineering Design and Construction

EYS and EZS bodies, plugs and nipples are manufactured from light-alloy copper-free aluminum with a natural finish, giving a strong, corrosion-resistant casting suited to coastal and marine-influenced sites such as those found throughout Oman’s Batinah coast and Duqm free zone. The fitting incorporates large threaded closures over the pouring opening, giving installers clear access to the conduit hub for building the fiber dam and pouring compound cleanly, then resealing the opening once the compound has cured. Minimum turning radius geometry keeps the fitting compact enough to install in congested cable tray and conduit runs without compromising the internal volume needed for an effective seal.

Every EYS and EZS fitting installed as part of a Cooper Crouse-Hinds (Eaton) hazardous-area system is selected to match the gas group, temperature class and ingress protection rating specified on the area classification drawing for the installation. IP67 protection per EN 60529 ensures the fitting resists dust ingress and temporary immersion, relevant for fittings mounted at grade or in wash-down areas of an LNG, refining or desalination facility. Because the fitting is a certified Ex component, Seven Star LLC only supplies genuine Cooper Crouse-Hinds product with full ATEX/IECEx documentation, allowing the fitting to be correctly reflected in the plant’s hazardous-area equipment register and inspection records.

EYS1 and EZS1 Key Features

  • EYS1/EZS1 is Ex II 2 G Ex d IIC certified under EC-type examination certificate LOM 03 ATEX 2108
  • EYS1/EYSA for vertical-only or horizontal-and-vertical mounting; EZS1 for installation at any angle
  • IP67 ingress protection rating per EN 60529 for outdoor and wash-down duty
  • Restricts flame and pressure-piling propagation between hazardous-area conduit sections
  • Large threaded pour openings for straightforward fiber damming and sealing-compound installation
  • Integral hub bushings protect conductor insulation from mechanical damage
  • Taper-tapped hub threads maintain ground continuity across the conduit joint
  • Light-alloy copper-free aluminum construction resists corrosion in coastal and offshore environments

Industrial Applications

EYS1 and EZS1 conduit sealing fittings are installed wherever a conduit crosses a hazardous-area boundary, enters an explosionproof enclosure, motor terminal box, junction box or luminaire, or where local code requires a seal within a specified distance of the enclosure entry. Typical installations include upstream and downstream gas processing trains, crude and product storage terminals, offshore platform topsides, LNG liquefaction and regasification facilities, and petrochemical process units where Zone 1 or Zone 2 classification applies to motor control, instrumentation and lighting circuits.

As an authorized Cooper Crouse-Hinds (Eaton) partner, Seven Star LLC supports EPC contractors, panel builders and plant maintenance departments across Oman and the GCC with correctly specified EYS and EZS fittings, matched compound and damming material, and technical guidance on seal placement relative to enclosure entries and area boundaries. Whether you are commissioning a new conduit and cable run in Sohar’s industrial port zone or replacing a damaged seal during a shutdown at a Muscat refinery, our stock position and Ex documentation are set up to keep your hazardous-area installation compliant without production delay.

EYS1/EZS1 Technical Specifications

ModelEYS1 / EZS1 Conduit Sealing Fitting
ManufacturerCooper Crouse-Hinds (Eaton)
Type of ProtectionEx II 2 G Ex d IIC
CertificateLOM 03 ATEX 2108
Ingress ProtectionIP67 per EN 60529
MountingEYS1: vertical or horizontal/vertical; EZS1: any angle
Body MaterialLight-alloy copper-free aluminum, natural finish
Hub ThreadingTaper-tapped for ground continuity
ApplicationConduit sealing at hazardous-area boundaries and enclosure entries

Frequently Asked Questions

Q: What is the difference between the EYS1 and EZS1 conduit sealing fittings?
A: The EYS1 is designed for vertical-only or combined horizontal/vertical mounting, while the EZS1 can be installed at any angle because its pour-opening cover can be repositioned after mounting.

Q: Does Seven Star LLC stock EYS and EZS fittings in Oman?
A: Yes. As an authorized Cooper Crouse-Hinds (Eaton) partner for Oman and the GCC, Seven Star LLC maintains a local stock position and can advise on correct sizing against your area classification drawing.

Q: What sealing compound is used with the EYS1/EZS1?
A: A two-part Crouse-Hinds sealing compound is poured over a fiber dam packed around the conductors inside the fitting; Seven Star LLC can supply matched compound and damming material with the fitting.

Q: Is the EYS1/EZS1 suitable for offshore and coastal installations?
A: Yes. The copper-free aluminum body and IP67 rating make it suitable for coastal and offshore environments such as those along Oman’s Batinah coast and Duqm free zone.

Q: Can Seven Star LLC provide a quotation for a full conduit sealing schedule?
A: Yes. Contact our technical sales team with your conduit schedule and area classification drawing and we will prepare a matched EYS/EZS quotation with certificate documentation.

Related Products

Reviews (0)

Reviews

There are no reviews yet.

Be the first to review “Cooper Crouse-Hinds EYS1/EZS1 ATEX Conduit Sealing Fittings”

Your email address will not be published.Required fields are marked *

About brand
Cooper Crouse-Hinds, part of Eaton's Crouse-Hinds series, is a leading American manufacturer of electrical and instrumentation products engineered for harsh, hazardous, and explosion-proof environments. At Seven Star LLC, we supply Crouse-Hinds' extensive range of explosion-proof lighting fixtures, conduit fittings, cable glands, junction and terminal boxes, plugs and receptacles, and control stations built to withstand corrosive atmospheres and extreme temperature swings. Established in 1897 and backed by more than a century of engineering heritage, these products are certified to ATEX, IECEx, and UL/cCSAus standards for use in classified hazardous locations. Cooper Crouse-Hinds equipment is widely deployed across oil and gas platforms, petrochemical refineries, mining operations, and marine installations where a single spark can trigger catastrophic failure. By supplying authentic Crouse-Hinds hardware, Seven Star LLC helps industrial operators across Oman and the GCC maintain rigorous explosion-proof compliance, protect personnel in classified zones, and extend the service life of critical electrical infrastructure in demanding field conditions.
Request for quotation (RFQ)
Cooper Crouse-Hinds EYS1 EZS1 ATEX conduit sealing fitting
Click to enlarge
Request for quotation (RFQ)

Frequently Asked Questions

What is the difference between the EYS1 and EZS1 conduit sealing fittings?
The EYS1 is designed for vertical-only or combined horizontal/vertical mounting, while the EZS1 can be installed at any angle because its pour-opening cover can be repositioned after mounting.
Does Seven Star LLC stock EYS and EZS fittings in Oman?
Yes. As an authorized Cooper Crouse-Hinds (Eaton) partner for Oman and the GCC, Seven Star LLC maintains a local stock position and can advise on correct sizing against your area classification drawing.
What sealing compound is used with the EYS1/EZS1?
A two-part Crouse-Hinds sealing compound is poured over a fiber dam packed around the conductors inside the fitting; Seven Star LLC can supply matched compound and damming material with the fitting.
Is the EYS1/EZS1 suitable for offshore and coastal installations?
Yes. The copper-free aluminum body and IP67 rating make it suitable for coastal and offshore environments such as those along Oman's Batinah coast and Duqm free zone.
Can Seven Star LLC provide a quotation for a full conduit sealing schedule?
Yes. Contact our technical sales team with your conduit schedule and area classification drawing and we will prepare a matched EYS/EZS quotation with certificate documentation.