FS-Curtis OL7.5 120G 7.5HP(2) Duplex Oil-less Air Compressor #OL7.5-D
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| Model / Part Number | OL7.5 Duplex |
| Horsepower | 7.5 HP (x2, Duplex) |
| Tank | 120 Gallon Horizontal ASME |
| Airflow | 23.1 CFM (x2) @ 100 PSI |
| Pressure Range | 100 PSI |
| Warranty | 12 months |
FS-Curtis OL7.5-D — 7.5 HP (x2, Duplex) Air Compressor
A larger food-processing plant running clean air across several stations at once can't gamble on a single oil-less pump failing mid-shift and shutting down a production line that has zero tolerance for contamination.
The FS-Curtis OL7.5-D is a duplex oil-less reciprocating compressor rated for 7.5 HP (x2, Duplex) with a 120 gallon horizontal ASME tank, sized for shops and commercial operations that need steady, dependable air output every day, with the option to bolt on accessories down the road.
Who the OL7.5-D Is Built For
- ✅ A larger food-processing, pharmaceutical, or dental facility running clean air across several stations simultaneously that a single 7.5 HP pump can't sustain alone
- ✅ An operation where compressed air downtime on a contamination-sensitive line means a lost production run, not just an inconvenience
- ✅ A facility that can service one pump during a shift without shutting down clean air supply to the rest of the operation
- ✅ A quality-critical operation that's already running the simplex OL7.5 near its limit and needs the combined CFM plus redundancy
- ✅ A facility standardizing on FS-Curtis's oil-less OL Series duplex tier for its highest-demand, most contamination-sensitive line
What the OL7.5-D Is NOT Built For
- ❌ Smaller operations where a simplex OL7.5 already covers the clean-air demand
- ❌ Facilities needing single-phase power — this unit is three-phase only
- ❌ Budget-conscious buyers — duplex costs meaningfully more than simplex at the same HP
What Makes the OL7.5-D Different
Oil-Less Pump Design
The FS-Curtis OL7.5-D uses a W75 (x2), Oil-less Design — a 100% dry-crankcase design built for continuous duty without oil, so there's no oil-change maintenance and zero risk of oil carryover into the compressed air line.
CFM & Pressure Output
Sustains 23.1 CFM (x2) @ 100 PSI at up to 100 PSI, built with enough capacity to supply clean, oil-free compressed air to contamination-sensitive processes and pneumatic equipment through a full shift without the tank draining down.
Power Requirements
Three-Phase only, 230V/460V options available. Confirm your panel and breaker sizing with an electrician before delivery.
- Built-in pump redundancy
- 46.2 CFM combined output
- Large contamination-sensitive facilities
- Smaller operations covered by simplex
- Single-phase-only electrical
OL7.5-D vs. FS-Curtis OL7.5 (7.5 HP, Simplex Oil-less) — Which Compressor Is Right for Your Shop?
| Decision Point | OL7.5-D | FS-Curtis OL7.5 (7.5 HP, Simplex Oil-less) |
|---|---|---|
| Horsepower / Tank | 7.5 HP x2 / 120 Gal Horizontal | 7.5 HP / 120 Gal Horizontal |
| CFM @ 100 PSI | 23.1 CFM x2 (46.2 CFM combined) | 23.1 CFM |
| Redundancy | Duplex — two independent pumps, built-in backup | Simplex — single pump, no built-in redundancy |
| Best fit | Larger facilities needing uptime insurance | Smaller operations where redundancy isn't required |
Choose the OL7.5-D when clean-air downtime is not an option for your facility. Choose the OL7.5 for a simpler, lower-cost setup if redundancy isn't a hard requirement. Both stay inside Alamo’s catalog — call (844) 480-6059.
Full Specifications — OL7.5-D
| Model / Part Number | OL7.5 Duplex |
| Horsepower | 7.5 HP (x2, Duplex) |
| Pump | W75 (x2), Oil-less Design |
| Configuration | Duplex Oil-less Reciprocating |
| Tank | 120 Gallon Horizontal ASME |
| Airflow | 23.1 CFM (x2) @ 100 PSI |
| Pressure Range | 100 PSI |
| Motor / Electrical | Three-Phase only, 230V/460V options available |
| Phase / Hz / Voltage | Three Phase: 3/60/230V (FOL07W75D1S-A3H1XX) 3/60/460V (FOL07W75D1S-A4H1XX) |
| Overall Dimensions | 103" L x 30" W x 60" H |
| Shipping Weight | 1565 lbs |
| Warranty | 12 months |
⚠️ Setup Requirements
- Electrical: Three-Phase only, 230V/460V options available; have an electrician confirm your panel capacity before delivery.
- Floor space: 103" L x 30" W x 60" H footprint; plan clear access on at least two sides for maintenance and tank drain.
- Ventilation: Locate in a dry, ventilated area away from dust and moisture to protect the pump and tank.
- Weight: 1565 lbs shipping weight — confirm your floor/dock can receive and position the unit.
- Setup: Installation is available as a quoted service (piping, electrical tie-in, functional test) — it’s not included in the purchase price. Call (844) 480-6059 for an install quote if you’d like Alamo’s crew to set it up.
FS-Curtis Warranty — OL7.5-D
FS-Curtis backs the OL7.5-D with a 1-year parts-only warranty.
| Component | Coverage Term |
|---|---|
| Tank & pump | 1 year parts |
| Motor & electrical components | 1 year parts |
| Wear items (belts, filters, gaskets) | Not covered (consumable) |
Warranty service is through Alamo Equipment & Service — call (844) 480-6059 instead of waiting on a manufacturer hotline. Coverage is subject to FS-Curtis warranty terms, conditions, and requirements.
Frequently Asked Questions — FS-Curtis OL7.5-D
Why Buy the OL7.5-D from Alamo Equipment & Service?
- Installation available. Buying online gets you the compressor — piping and electrical tie-in are an extra-charge service. We have the crews to install it and can quote that separately; call (844) 480-6059 for a quote.
- We service it. These compressors need preventative maintenance up to 4x a year per the manufacturer — belt and air filter checks, valve and piston-ring inspection, contactor and electrical inspection. Call (844) 480-6059 for maintenance, repairs, or support — and if you ever need warranty work, we register your equipment with the manufacturer and handle the claim directly, so you’re not stuck navigating vendor support on your own.
- We size it with you. 7.5 HP (x2, Duplex), a 120 gallon horizontal ASME tank, 23.1 CFM (x2) @ 100 PSI — we’ll confirm this matches your shop’s actual air draw before you order.
- Free shipping. Ships free to the 48 contiguous states.
- Expert comparison help. Not sure if the OL7.5-D or the FS-Curtis OL7.5 (7.5 HP, Simplex Oil-less) is the better fit? We’ll walk you through it.
A shop buying from a pure e-commerce retailer gets a box. A shop buying from Alamo gets a partner.
Shipping Rates and Delivery Estimates: Shipping is FREE to the 48 contiguous United States.
Shipment Processing Time: All orders are processed within [2–3] business days of receipt, excluding weekends and holidays. Orders are not processed or shipped from Friday at 12 pm CST through Sunday or on holidays. During periods of high order volume, shipments may be delayed by a few days. Customers will be notified via email or phone in the event of significant delays.
See the attached document for FS CURTIS WARRANTY