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FS-Curtis ML20+ 240G 20HP(2) Duplex Tank Mounted Electric Air Compressor
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FSCurtis
FS-Curtis ML20+ 240G 20HP(2) Duplex Tank Mounted Electric Air Compressor
FS-Curtis ML20+ 240G 20HP(2) Duplex Tank Mounted Electric Air Compressor
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The FS-Curtis ML20+ Duplex is the ultimate industrial air compressor solution for demanding operations with varying air demand levels. Featuring two 20HP motors driving C98 pressure-lubricated pumps and a 240-gallon ASME approved tank, this duplex configuration delivers 158.6 CFM at 175 PSI with intelligent alternating control. Built with 100% cast-iron construction where it counts and equipped with FS-Curtis exclusive Centro-Ring pressure lubrication, this compressor is engineered for 100% continuous duty in the most challenging industrial environments. Duplex design means longer pump life, reduced electrical costs, and zero maintenance downtime thanks to redundant pumps that ensure you always have air when you need it.
Masterline Series: Built Tough to Last a Lifetime
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 – Patented FS-Curtis Design
The Centro-Ring pressure lubrication system is an exclusive FS-Curtis technology that sets the ML20+ apart from the competition. This proprietary system supplies pressurized oil internally to all bearings and critical wear surfaces through rifle-drilled crankshafts and connecting rods. The result? Maximum uptime, dramatically increased service life, and superior protection against wear in continuous-duty applications. This patented design helps ensure your investment delivers decades of reliable performance.
- Proprietary technology is an FS-Curtis exclusive
- Supplies pressurized oil internally to all bearings and critical wear surfaces through the rifle-drilled crankshaft and connecting rods
- Helps ensure maximum uptime and increase service life
100% Cast-Iron Construction Where It Counts
All cast-iron where it matters for longer life with less maintenance. While some manufacturers claim "100% cast-iron" yet still use aluminum cylinders, cylinder heads, connecting rods and crankshafts, FS-Curtis delivers the real deal. Every critical component – cylinders, cylinder heads, connecting rods, and crankshaft – is constructed from 100% cast iron or ductile cast iron.
- Some pumps claim 100% cast-iron yet still have aluminum cylinders, cylinder heads, connecting rods and crankshafts – not FS-Curtis
- Ductile cast-iron crankshaft and connecting rods are stronger, more corrosion-resistant and less likely to break
- Slow-turning pump increases pump life
- Rugged parts and construction for industrial performance
Quality Components – Built for 100% Continuous Duty
Every component in the ML20+ Duplex is selected and engineered for demanding, round-the-clock operation. From industry-leading valve assemblies to oversized bearings and premium cooling systems, this compressor is designed to run continuously without compromise.
- Industry-leading stainless-steel valve assemblies for increased airflow and reliability
- Oversized tapered main roller bearings to ensure long life
- Premium finned intercooler maximizes heat dissipation
- Metal intake filter/silencer is superior to plastic
- Heavy-duty stamped-steel belt guard
- Suction valve head unloaders for continuous running air compressors
Duplex Advantage: Efficiency, Redundancy, and Longevity
Duplex compressors are ideal when there are varying demand levels during operation. By alternating demand across two pumps, a duplex compressor also delivers longer pump life. The redundant pumps ensure you'll always have air, eliminating maintenance downtime. The ML20+ Duplex features an advanced alternator control panel with magnetic motor starters and thermal overload protection, intelligently managing both compressors for optimal performance and energy efficiency.
- Alternator control panel comes mounted with magnetic motor starters and thermal overload protection
- Compressors alternate during normal operation for extended pump life
- Both compressors run when system demands require maximum airflow
- Duplex design reduces electrical cost and eliminates downtime
- Factory oil filled and ready to run
- 3-position alternator switch for flexible operation modes
Voltage Options Available
The ML20+ Duplex is available in multiple three-phase configurations to match your facility's power requirements:
- 3/60/200-208V - FML20C98D4S-A9L1XX
- 3/60/230V - FML20C98D4S-A3L1XX
- 3/60/460V - FML20C98D4S-A4L1XX
Key Features at a Glance
- 158.6 CFM at 175 PSI – powerful airflow for demanding applications
- 240-gallon ASME approved tank – substantial air storage capacity
- Duplex configuration – two 20HP motors with intelligent alternating control
- Centro-Ring pressure lubrication – patented FS-Curtis technology for maximum uptime
- 100% cast-iron construction – cylinders, heads, connecting rods, and crankshaft
- Premium Efficiency Motors – reduced energy consumption (3-phase only)
- Factory oil filled – ready to run out of the box
- Made in USA – American-built quality and craftsmanship
Complete Equipment Package
The ML20+ Duplex comes fully equipped with professional-grade components and safety features:
- Magnetic motor starter (60Hz)
- Automatic Start-Stop control
- ASME approved air receiver and safety relief valve
- UL approved pressure switch
- Dial read-out pressure gauge
- NEMA-1 alternator control panel
- Manual condensate tank drain valve
- Tank shut off valve
- ASME approved discharge valve air service valve
- Metal intake filter-silencers
- Dynamically balanced flywheel
- OSHA approved totally enclosed belt guard
- Slow V-belt drive for extended service life
- Standard two power source
Video Overview
Watch the video above to see the ML Series compressor features and construction quality in detail.
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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