FS-Curtis ML20+ 240G 20HP(2) Duplex Ultra Pack Air Comp #ML20Plus-DUP
Couldn't load pickup availability
| Model / Part Number | ML20+ Ultra Pack Duplex |
| Horsepower | 20 HP (x2, Duplex) |
| Tank | 240 Gallon Horizontal ASME |
| Airflow | 158.6 CFM @ 175 PSI |
| Pressure Range | 175 PSI |
| Warranty | 12 months |
FS-Curtis ML20Plus-DUP — 20 HP (x2, Duplex) Air Compressor
The highest-volume manufacturing facilities need both the redundancy of two independent 20 HP pumps and the factory-installed air-quality accessories that keep a large operation running without a maintenance tech manually managing tank drains across a sprawling facility.
The FS-Curtis ML20Plus-DUP is a duplex two-stage reciprocating, ultra pack compressor rated for 20 HP (x2, Duplex) with a 240 gallon horizontal ASME tank, built for multi-bay shops and commercial operations that need compressed air on tap all day. The included Ultra Pack — factory-installed automatic tank drain and refrigerated air dryer — takes the guesswork out of tank maintenance and air quality, freeing up your team's time for actual repair work instead.
Who the ML20Plus-DUP Is Built For
- ✅ A large manufacturing facility running multiple production lines where a compressor outage stops everything at once, and the second pump keeping the line running pays for itself the first time it's needed
- ✅ A high-volume operation where an aging single compressor has already failed mid-production run, costing hours of downtime across the facility
- ✅ A facility that's grown past what a simplex unit can support and needs both maximum combined CFM (158.6) and the uptime insurance of a second pump, plus the factory-installed dryer
- ✅ An operator who's already standardized on FS-Curtis's ML Series at other locations and wants the top Ultra Pack duplex tier for the highest-volume facility in the group
- ✅ A facility manager budgeting for planned production expansion who'd rather buy the headroom and accessories now than upgrade twice
What the ML20Plus-DUP Is NOT Built For
- ❌ Smaller or mid-size facilities — this is the most expensive configuration in the ML20 line and is overkill for lighter demand
- ❌ Budget-conscious buyers — the base ML20PLUS-D duplex without Ultra Pack saves meaningfully if accessories aren't needed yet
- ❌ Facilities with limited floor space — still a large-footprint duplex unit even at the smaller of the two ML20 duplex tank layouts
What Makes the ML20Plus-DUP Different
Commercial 2-Stage Pump
The ML20Plus-DUP uses a C98 (x2), Cast-Iron, Two-Stage pump built for daily, all-day duty cycles — not a hobby-grade single-stage unit that struggles under continuous shop use.
CFM & Pressure Output
The pump is built for 158.6 CFM @ 175 PSI at up to 175 PSI — enough headroom to run impact wrenches, tire equipment, and paint tools through back-to-back jobs without a dip in pressure.
Ultra Pack Upgrades
Includes factory-installed automatic tank drain and refrigerated air dryer — upgrades that reduce maintenance and extend the life of the tank and pump versus a base-model compressor.
Power Requirements
Three-Phase only, 230V/460V options available. Confirm your panel and breaker sizing with an electrician before delivery.
- Redundancy + factory accessories
- 158.6 CFM combined output
- Highest-volume manufacturing facilities
- Smaller / mid-size facilities
- Budget-first buyers
ML20Plus-DUP vs. FS-Curtis ML20PLUS-D (Duplex, no accessories) — Which Compressor Is Right for Your Shop?
| Decision Point | ML20Plus-DUP | FS-Curtis ML20PLUS-D (Duplex, no accessories) |
|---|---|---|
| Horsepower / Tank | 20 HP x2 / 240 Gal Horizontal | 20 HP x2 / 240 Gal Horizontal |
| CFM @ 175 PSI | 158.6 CFM combined | 158.6 CFM combined |
| Redundancy + accessories | Duplex pumps + Ultra Pack bundle (auto-drain/dryer) | Duplex pumps, standard configuration |
| Best fit | Highest-volume facilities wanting redundancy and factory accessories together | Facilities wanting redundancy at a lower price |
Choose the ML20Plus-DUP for the most fully-equipped, redundant setup in the ML20 line. Choose the ML20PLUS-D for the same redundancy at a lower price if you don't need the Ultra Pack accessories. Both stay inside Alamo’s catalog — call (817) 865-3707.
Full Specifications — ML20Plus-DUP
| Model / Part Number | ML20+ Ultra Pack Duplex |
| Horsepower | 20 HP (x2, Duplex) |
| Pump | C98 (x2), Cast-Iron, Two-Stage |
| Configuration | Duplex Two-Stage Reciprocating, Ultra Pack |
| Tank | 240 Gallon Horizontal ASME |
| Airflow | 158.6 CFM @ 175 PSI |
| Pressure Range | 175 PSI |
| Motor / Electrical | Three-Phase only, 230V/460V options available |
| Phase / Hz / Voltage |
Three Phase: 3/60/200-208V (FML20C98D4U-A9L1XX) |
| Ultra Pack Features | factory-installed automatic tank drain and refrigerated air dryer |
| Overall Dimensions | 105" L x 53" W x 73" H |
| Shipping Weight | 3800 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: 105" L x 53" W x 73" 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: 3800 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 (817) 865-3707 for an install quote if you’d like Alamo’s crew to set it up.
FS-Curtis Warranty — ML20Plus-DUP
FS-Curtis backs the ML20Plus-DUP with a 1-year parts-only warranty.
| Component | Coverage Term |
|---|---|
| Tank & pump | 1 year parts |
| Motor & electrical components | 1 year parts |
| Ultra Pack accessories (auto tank drain, refrigerated air dryer) | 1 year parts |
| Wear items (belts, filters, gaskets) | Not covered (consumable) |
Warranty service is through Alamo Equipment & Service — call (817) 865-3707 instead of waiting on a manufacturer hotline. Coverage is subject to FS-Curtis warranty terms, conditions, and requirements.
Frequently Asked Questions — FS-Curtis ML20Plus-DUP
Why Buy the ML20Plus-DUP 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 (817) 865-3707 for a quote.
- We service it. These compressors need preventative maintenance up to 4x a year per the manufacturer — oil changes, belt and air filter checks, contactor and electrical inspection. Call (817) 865-3707 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. 20 HP (x2, Duplex), a 240 gallon horizontal ASME tank, 158.6 CFM @ 175 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 ML20Plus-DUP or the FS-Curtis ML20PLUS-D (Duplex, no accessories) 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.
Ships by freight. Add to cart and enter your ZIP for a freight quote, or call us.
See the attached document for FS CURTIS WARRANTY