
DSP SERIES OIL FREE ROTARY SCREW AIR COMPRESSOR
Certified Class 0 Oil Free Air. Optimized for Energy Efficiency. The DSP Series brings advanced oil free operations right where it is needed: your facility!

PRODUCT DESCRIPTION
Built on Hitachi engineering, the DSP is designed to supply oil free air reliably and efficiently— today and tomorrow.
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Innovative Air End Construction
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Oil Mist Remover
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Motorized Isolation Valve
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FLOW
117-1303 cfm
3.3 - 36.9 m3/min
PRESSURE
125 psi
3.3 - 36.9 m3/min
POWER
30 - 300 hp
22 -240 kW
FEATURES & BENEFITS
Innovative Air End Construction
Key features:
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Rotor design, material and coating optimized for efficiency
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Stainless steel rotors in 1st and 2nd stage
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Patented PTFE-free rotor coating
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Rotor housing coated internally
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Benefits:
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All aspects of the air end have been carefully engineered to provide long life and high efficiency
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The stainless steel rotors, patented rotor coating and coated housing provide long life of air end
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Patented High Pre-Cooler Design (Air Cooled Units)
Key features:
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Stainless steel high pre-cooler placed before aftercooler
Benefits:
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Helps prevent thermal fatigue and premature failure of the aftercooler, providing higher reliability and durability
Motorized Isolation Valve (MIV)
Key features:
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Located at the compressed air discharge, the MIV helps avoid migration of moisture back into the compressor package when the DSP is not running
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Opens when the motor is running and closes when the motor is off
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Benefits:
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Provides additional protection for the compressor against downstream humidity – one of the biggest enemies of oil free screw compressors
Oil Mist Remover (OMR)
Key features:
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Removes oil mist from gearcase with 99.99% efficiency
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Maintains gearcase at negative pressure
Benefits:
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Recaptured oil mist is returned, reducing gearcase top offs needed — saving you money
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Helps ensure a cleaner production environment around the compressor
Capacity Control System
Fixed Speed
Key features:
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Spool type — simple design
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Pneumatically controlled
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Designed to operate 1 million cycles/year
Benefits:
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High reliability and durability
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Lower maintenance cost
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Longer maintenance intervals
Variable Speed Drive (VSD)
Key features:
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No inlet valve on VSD
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Two speed reduction
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Turndown works always in the most efficient range of specific power. Below turndown DSP works load/unload at minimum point of turndown
Benefits:
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No restriction means no air losses at inlet
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Minimize power consumption at unload condition
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Power consumption at no load is reduced up to 30% vs fixed speed of same model
Hitachi Motors
Key features:
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IE3, TEFC and IP44 (Fixed Speed 22-240 kW models and VSD 160-240 kW models)
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TEFC, DCBL-PPM and IE4 (DSP37V, DSP55V and DSP75V models)
Benefits:
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Support provided in house — no external motor suppliers to navigate
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Motors are high efficiency and very compact
VSD Fan Motors
Available on DSP22-75
Benefits:
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More efficient cooling system
Hitachi Inverters
Benefits:
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Support provided in house — no external inverter suppliers to navigate
Phase Monitor
Benefits:
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Protects the compressor against improper reverse rotation at startup
*Restrictions apply*
FIXED SPEED MODEL OPTIONS
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NEMA 4
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For electrical panel and controller
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Weather Hood + NEMA 4
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Includes rain protection cover and intake louvers protection
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Cold Weather Package
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Includes oil sump heater, control box heater and thermostat, heat trace control and condensate lines
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Available only with air cooled models
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AWA Container — all weather enclosure