Powerex · OTD · SINGLE-STAGE PISTON
🇺🇸Medical / Dental

OTD0303 Oil-Free Duplex Piston (3 HP x 2, 80 gal)

6 HP · oil-less · 1-stage
LOWEST PRICE
$5,950
Powerex OTD0303 Oil-Free Duplex Piston (3 HP x 2, 80 gal)

The Powerex OTD0303 Oil-Free Duplex pairs two 3 HP motors and two oilless reciprocating piston pumps with composite-piston technology and PTFE compression rings on an 80-gallon horizontal tank for 20.25 SCFM combined at 100 PSI (145 PSI max). Belt drive with unloading start for loadless motor starts. 100% oil-free output suits medical air, dental compounding, food processing, and any application where oil contamination is unacceptable. Three-year warranty on the pump. Powerex is a Gardner Denver brand, USA-made in Harrison, Ohio.

HP
6
CFM
20.3 @ 100 PSI
Duty
— continuous
Tank size
80 gal
Air output per horsepowerAirflow per motor HP
3.38CFM/HP
Poor 2.8Typical 3.15Good 3.5
Isentropic efficiencyClass median · 1-stage piston
58%
Poor <50Good 70Best 92
Price per cubic foot · minuteVerified retailer price
$294$/SCFM
Good $180Typical $211High $260
PUMP & DRIVE
Stages1-stage recip
Cylinder4-cylinder
Pump RPM1115 rpm
Lubricationoil-less
OilN/A – oil-free design (no oil contacts air)
Sump—
Pump life30,000 hrs
Pump material—
Head material—
Intercooler—
PERFORMANCE
Catalog CFM20.3 @ 100 PSI
CFM / HP3.38
Cut-in / out90 / 120 PSI
Tank fill—
Est. draw5.3 kW
COST & MAINTENANCE
Compressor Controller ROI calc · $0.14/kWh · 1920 hr/yr · 70% motor efficiency · HP×1.10 sizing · savings 23–42% of electric
Electric · yearlyEst. $1,891
Maintenance · yearlyEst. $150
Savings with Compressor Controller · yearlyEst. $435–$794
ELECTRICAL & FORM
Service—
Voltage208/230/460
Amps—
Motor—
Motor RPM1750 rpm
Controlduplex panel with unloading start, alternation
Startermagnetic with alternator
Weight650 lb
Form— · 80 gal · 200 PSI tank rating
BUILD & ENVIRONMENT
Air outlet1/2 in NPT
DrainManual ball valve standard (electronic optional)
Drain outlet—
ASME tankYes
Made in USAYes
Noise72 dBA
Op. temp40–104 °F
Dimensions38 x 28 x 72 in
Ship weight650 lb
Warranty36 mo parts

Where this sits in the catalog

Histograms below: highlighted bar marks this unit’s bucket.

Catalog
1655 units
Peer class
4 · 6 HP
Sizing & pricevs. 4 in class
  • SCFM @ 6 HP20.3cfm
    15median 21.423
    -5.5% vs. median
  • Average price$5,950
    $5,950median $8,085$8k
    -26.4% vs. median
Efficiency vs. peersvs. 4 in class
  • CFM per HP3.38cfm/hp
    2.5median 3.773.87
    -10.4% vs. median
  • Price per CFM$294$/scfm
    $293median $374$513
    -21.5% vs. median
Where this is soldPricing pending verification