FS-Curtis ML20 120G Horizontal 20HP Simplex Tank Electric Air Compressor #ML20-SH
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| Model / Part Number | ML20 Simplex |
| Horsepower | 20 HP |
| Tank | 120 Gallon Horizontal ASME |
| Airflow | 65.1 CFM @ 175 PSI |
| Pressure Range | 175 PSI |
| Warranty | 12 months |
FS-Curtis ML20-SH — 20 HP Air Compressor
A production line supervisor has watched a 15 HP compressor lose pressure every time the second and third pneumatic stations run at once — the facility just needs the extra CFM of the 20 HP tier, since maintenance already handles the tank drain manually and doesn't want that changed.
The FS-Curtis ML20-SH is a two-stage reciprocating compressor rated for 20 HP with a 120 gallon horizontal ASME tank, built for shops and commercial operations running compressed air all day, in a base configuration that keeps the upfront cost down.
Who the ML20-SH Is Built For
- ✅ A production facility that's watched a 15 HP compressor lose pressure under real multi-station demand and needs the extra CFM headroom of the 20 HP tier
- ✅ A facility with an existing air dryer or filtration system already installed, not needing factory-bundled accessories duplicating what's in place
- ✅ An operation wanting the lower entry price of a base configuration with the option to add accessories later if demand changes
- ✅ A commercial shop replacing an aging compressor that's started struggling under real daily multi-tool load
- ✅ A facility standardizing on FS-Curtis's ML Series for parts and service commonality, starting at the base 20 HP tier
What the ML20-SH Is NOT Built For
- ❌ Smaller shops whose demand is fully covered by a 10-15 HP unit — the ML10/ML15 line saves real money if 65 CFM isn't needed
- ❌ Shops wanting factory auto-drain/dryer accessories standard — the Ultra Pack (ML20-HUP) adds those, this base unit doesn't
- ❌ Facilities needing 120V/240V single-phase power — this unit is three-phase only
What Makes the ML20-SH Different
Commercial 2-Stage Pump
The ML20-SH uses a C89, 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
Puts out 65.1 CFM @ 175 PSI, holding up to 175 PSI — enough capacity to run impact wrenches, tire equipment, and paint tools without the compressor falling behind.
Power Requirements
Three-Phase only, 230V/460V options available. Confirm your panel and breaker sizing with an electrician before delivery.
- 65.1 CFM at 20 HP
- Lower entry price, no bundled accessories
- Multi-station production facilities
- Shops covered by 10-15 HP
- Single-phase-only electrical
ML20-SH vs. FS-Curtis ML20-HUP (20 HP, Ultra Pack) — Which Compressor Is Right for Your Shop?
| Decision Point | ML20-SH | FS-Curtis ML20-HUP (20 HP, Ultra Pack) |
|---|---|---|
| Horsepower / Tank | 20 HP / 120 Gal Horizontal | 20 HP / 120 Gal Horizontal |
| CFM @ 175 PSI | 65.1 CFM | 65.1 CFM |
| Included accessories | Standard configuration, no bundled accessories | Ultra Pack bundle (auto-drain/dryer) |
| Best fit | Facilities wanting more CFM at a lower entry price | Facilities wanting factory air-quality accessories included |
Choose the ML20-SH for the same 65.1 CFM output at a lower entry price if you don't need bundled accessories. Choose the ML20-HUP if factory-installed air-quality accessories matter more than saving on the upfront price. Both stay inside Alamo’s catalog — call (844) 480-6059.
Full Specifications — ML20-SH
| Model / Part Number | ML20 Simplex |
| Horsepower | 20 HP |
| Pump | C89, Cast-Iron, Two-Stage |
| Configuration | Two-Stage Reciprocating |
| Tank | 120 Gallon Horizontal ASME |
| Airflow | 65.1 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 (FML20C89H1S-A9L1XX) |
| Overall Dimensions | 73" L x 33" W x 58" H |
| Shipping Weight | 1095 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: 73" L x 33" W x 58" 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: 1095 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 — ML20-SH
FS-Curtis backs the ML20-SH 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 ML20-SH
Why Buy the ML20-SH 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 — oil changes, belt and air filter checks, 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. 20 HP, a 120 gallon horizontal ASME tank, 65.1 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 ML20-SH or the FS-Curtis ML20-HUP (20 HP, Ultra Pack) 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