The Eaton Crouse-Hinds OAC Series consists of explosionproof pushbutton stations and selector switches designed for hazardous locations where flammable vapors, gases, or combustible dusts may be present. These units are engineered for oil refineries, chemical plants, offshore drilling, and other industrial applications that demand reliable and safe control solutions.
Description
Key Features & Benefits
✅ Explosionproof & Dust-Ignitionproof Construction
- Certified for Class I, Div. 1 & 2, Groups A, B, C, D
- Suitable for Class II, Div. 1, Groups E, F, G and Class III hazardous locations
✅ Factory-Sealed Design
- No external seals required, reducing installation time and costs
- Threaded dome-type cover ensures a tight seal against moisture and dust
✅ Heavy-Duty Build for Industrial Use
- Enclosure Material: Feraloy® iron alloy (electrogalvanized, aluminum acrylic paint)
- Covers and Handles: Copper-free aluminum
- Operating Shafts: Stainless steel for durability
✅ Environmental Protection & Ratings
- NEMA Ratings: 3, 4, 7ABCD, 9EFG, 12 (raintight, watertight, dust-ignitionproof)
- UL & CSA Certified: UL1203, CSA C22.2 No. 30
✅ Customizable Options
- Padlock-ready pushbutton guards to prevent unauthorized use
- Momentary and maintained selector switch options
- Engraved legend plates with standard labels
Ordering Information – Pushbutton Stations
| Normal Position | 1 Circuit Universal | 2 Circuits Universal | 2 Circuits Universal (Double Handle) | 2 Circuits (Double Handle, Special Wiring) | Operating Handles |
|---|---|---|---|---|---|
| Single Handle | OAC2101 (¾” Hub) / OAC3101 (1” Hub) | OAC2133 (¾” Hub) / OAC3133 (1” Hub) | OAC2139 (¾” Hub) / OAC3139 (1” Hub) | OAC2103 (¾” Hub) / OAC3103 (1” Hub) | Rocker Type |
| Double Handle | N/A | N/A | N/A | OAC2291 (¾” Hub) / OAC3291 (1” Hub) | Rocker Type |
💡 Replacement pushbuttons: ED21 (Single), ED22 (Double), ED22D (Special Wiring)
Ordering Information – Selector Switches
| Style | Position 1 | Position 2 | Position 3 | Replacement Contact Blocks | ¾” Hub Cat. # | 1” Hub Cat. # |
|---|---|---|---|---|---|---|
| Two-Position, Two-Circuit | Circuit A | Circuit B | N/A | ED21 | OAC2471 | OAC3471 |
| Two-Position, Four-Circuit | Circuit A | Circuit B | N/A | ED22 | OAC2472 | OAC3472 |
| Three-Position, Two-Circuit | Circuit A | Circuit B | Circuit C | ED21 | OAC2473 | OAC3473 |
| Three-Position, Four-Circuit | Circuit A | Circuit B | Circuit C | ED22 | OAC2474 | OAC3474 |
| Three-Position, Special Wiring | Circuit A | Circuit B | Circuit C | ED22 | OAC2475 | OAC3475 |
💡 Selector switch options: Maintained contact (standard), Momentary operation with spring return (Suffix: S634, S635)
Standard Legend Plate Labels (Available for Pushbuttons & Selector Switches)
- START / STOP
- ON / OFF
- OPEN / CLOSE
- RAISE / LOWER
- HAND / AUTOMATIC
- FORWARD / REVERSE
- JOG / RUN / TEST
💡 Custom labels available upon request.
Options & Accessories
| Description | Suffix Code |
|---|---|
| Momentary Contact Clockwise (Spring Return), Maintained Contact Counterclockwise | S634 |
| Momentary Contact Counterclockwise (Spring Return), Maintained Contact Clockwise | S635 |
| Back Boss Drilled & Tapped (¾” & 1” Conduit Sizes) | Specify |
Applications
Industries & Use Cases
✔ Petroleum Refineries – Safe motor and pump control in hazardous areas
✔ Chemical & Petrochemical Plants – Built to withstand corrosive environments
✔ Offshore Drilling Platforms – Rugged, watertight enclosures for marine applications
✔ Grain & Food Processing Facilities – Explosionproof protection against combustible dust
✔ Power Plants & Utilities – Reliable switching for heavy-duty electrical circuits
Why Choose Eaton Crouse-Hinds OAC Series?
🔹 Explosionproof & Dust-Ignitionproof – Designed for Class I, II, and III hazardous locations
🔹 Factory-Sealed – Eliminates the need for external sealing fittings
🔹 Heavy-Duty Construction – Corrosion-resistant materials for harsh environments
🔹 Customizable Configurations – Pushbuttons, selector switches, and legend plates available
🔹 Easy Installation – Pre-assembled units simplify mounting and wiring
How to Order
1️⃣ Determine Your Requirements
- Select the pushbutton station or selector switch model
- Choose momentary or maintained operation
- Confirm voltage and circuit configuration
2️⃣ Specify Additional Options
- Add suffix codes for custom features
- Choose a legend plate marking
3️⃣ Contact an Eaton Distributor or Sales Representative
- Provide catalog number, quantity, and required specifications
- Confirm availability, pricing, and lead times
Final Thoughts
The Eaton Crouse-Hinds OAC Series pushbutton and selector switch control stations offer reliable control solutions for hazardous locations. With explosionproof construction, durable materials, and easy ordering options, these units provide long-term safety and efficiency in industrial applications.
For industries that demand explosionproof, dust-ignitionproof, and watertight control solutions, the OAC Series is a proven choice for superior protection and performance.
