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FS-Curtis ML20 120G Horizontal 20HP Simplex Tank Mounted Elec Air Compressor
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FSCurtis
FS-Curtis ML20 120G Horizontal 20HP Simplex Tank Mounted Elec Air Compressor
FS-Curtis ML20 120G Horizontal 20HP Simplex Tank Mounted Electric Air Compressor
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The FS-Curtis ML20 Masterline Series represents the pinnacle of industrial reciprocating air compressor engineering. This 20HP simplex tank-mounted unit delivers 65.1 CFM at 175 PSI with a robust 120-gallon horizontal tank configuration, making it an ideal powerhouse for demanding shop environments where reliability and continuous duty performance are non-negotiable. Built with 100% continuous duty capability, this compressor features the proprietary Centro-Ring pressure lubrication system, a patented FS-Curtis exclusive that ensures maximum uptime and extended service life through pressurized oil delivery to all critical wear surfaces. Available in three-phase configurations including 200-208V, 230V, and 460V options, the ML20 is engineered to replace inferior splash-lubricated and small rotary compressors with a superior, heavy-duty alternative that's built tough to last a lifetime in industrial working conditions.
Voltage Configurations Available
All ML20 models are configured for three-phase operation with premium efficiency motors. Select the voltage that matches your facility's power infrastructure:
- 3/60/200-208V - Model FML20C89H1S-A9L1XX
- 3/60/230V - Model FML20C89H1S-A3L1XX
- 3/60/460V - Model FML20C89H1S-A4L1XX
Why Masterline ML Series Stands Above the Competition
Masterline is the most robust, heavy-duty reciprocating air compressor lineup available. The perfect combination of quality components and efficient design make the ML Series rugged, affordable and smart. Because every model is built tough to last a lifetime in demanding working conditions, the ML Series is an outstanding alternative to splash-lubricated reciprocating compressors and small rotary compressors. Choose higher quality. Choose superior durability. Choose ML Series pressure lubricated air compressors.
Centro-Ring Pressure Lubrication System – Patented FS-Curtis Exclusive
The Centro-Ring pressure lubrication system is a proprietary technology exclusive to FS-Curtis that sets the ML Series apart from competitors. This advanced system supplies pressurized oil internally to all bearings and critical wear surfaces through the rifle-drilled crankshaft and connecting rods. The result? Maximum uptime, dramatically increased service life, and protection against premature wear even under the most demanding continuous-duty cycles.
- Proprietary technology available only from FS-Curtis
- Pressurized oil delivery through rifle-drilled crankshaft and connecting rods reaches all bearings and critical wear surfaces
- Ensures maximum uptime and extends service life far beyond splash-lubricated competitors
- Factory oil filled and ready for operation
100% Cast-Iron Construction – All Cast-Iron Where It Counts for Longer Life
Many pumps claim "100% cast-iron" yet still cut corners with aluminum cylinders, cylinder heads, connecting rods, and crankshafts. Not FS-Curtis. The ML20 features 100% cast-iron cylinders, cylinder heads, connecting rods, and crankshaft – true industrial-grade construction where it matters most. This means superior heat dissipation, exceptional corrosion resistance, and durability that outlasts aluminum components by years.
- Ductile cast-iron crankshaft and connecting rods are stronger, more corrosion-resistant, and far less likely to break under load
- Slow-turning pump design significantly increases pump life and reduces wear
- Rugged parts and construction engineered specifically for industrial performance and 100% continuous duty
- Dynamically balanced flywheel for smooth, vibration-free operation
Premium Quality Components – Built for 100% Continuous Duty
Every component on the ML20 is selected for industrial-grade performance and longevity. From the industry-leading stainless-steel valve assemblies to the oversized tapered main roller bearings, this compressor is engineered to run continuously in the harshest shop environments without compromise.
- Industry-leading stainless-steel valve assemblies for increased airflow and superior reliability
- Oversized tapered main roller bearings engineered to ensure long life under heavy loads
- Premium finned intercooler maximizes heat dissipation and improves efficiency
- Metal intake filter-silencer – superior durability compared to plastic alternatives
- Heavy-duty stamped-steel belt guard (OSHA approved totally enclosed design)
- Suction valve head unloaders designed for continuous-running air compressors
- Slow V-belt drive for efficient, quiet power transmission
- Premium Efficiency Motors (three-phase only) for reduced energy consumption
Complete Control and Safety Features
The ML20 simplex compressor is well suited for common applications where only one compressor is needed. It comes fully equipped with professional-grade controls and safety features that ensure reliable, worry-free operation.
- Magnetic motor starter (60Hz) for reliable, smooth motor engagement
- Automatic Start-Stop control for hands-free operation
- Dual Control ML5-ML15 (D97 Pump) with pilot valve
- NEMA-1 control panel for industrial applications
- UL approved pressure switch for safe, reliable pressure management
- Dial read-out pressure gauge for easy monitoring
- ASME approved safety relief valve for overpressure protection
- ASME approved air receiver (120-gallon capacity)
- ASME approved discharge valve air service valve
- Manual condensate tank drain valve for routine maintenance
- Tank shut-off valve for safe servicing
Key Performance Highlights
- 20HP motor with C89 pump delivering 65.1 CFM at 175 PSI
- 120-gallon ASME approved horizontal tank for extended run times and reduced cycling
- Premium efficiency three-phase motors available in 200-208V, 230V, and 460V configurations
- Compact footprint: 73" L x 33" W x 58" H – horizontal design saves floor space
- Made in the USA with FS-Curtis legendary quality and support
See the Masterline Series in Action
Watch this video to see why FS-Curtis Masterline compressors are trusted by professionals nationwide for their rugged construction, continuous-duty performance, and unmatched reliability:
Looking for full specifications and features?
Check out the Product Specifications and Product Features tabs
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1 Year Factory Warranty extends to 2 years with use of FS-Curtis Maintenance Products. See full Warranty Policy & Procedure Manual