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ENERGY
EFFICIENT CONTROL SYSTEM
For proven maximum energy savings Curtis offers on line-off line or start-stop
control with delay off timer. Optional modulation may also be added (Modulation
is standard on 25 HP+). During unload cycle sump drops to low pressure
resulting in an additional 10-12% electrical savings over conventional
sytems when in idle mode.
INSTRUMENTATION
Display includes discharge and sump pressure gauges, temperature gauge,
hour meter, dual high air/oil shutdown switches with light, start-stop/reset
buttons, dual control switch, no load start switch, standby light, and
power-on light.
RUGGED
AIR END DESIGN
All Curtis Air Ends are manufactured to ISO 9001 Certification and are
built for 100% duty cycle. Zero wear Curtis rotors run in an oil
bath and have no metal to metal contact. In most cases, our rotors and
bearings are larger by horsepower range than competitive units.
LEAK FREE DESIGN
With substantially reduced fittings along with high quality steel
tubing and o-ring sealed hydraulic connections, Curtis units are designed
to eliminate potential leaks.
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CONTROL
CABINET
Conveniently located with hinged access door. Built-in across the line
magnetic motor starters with thermal overload protection ensures long
motor life. 115 volt control circuit transformer is provided for safe
operation. Standard NEMA 1 Rated cabinet and electrical controls are U.L.
and CSA listed. All electrical components are standard off the shelf for
easy replacement.
ELECTRIC
MOTORS
The R/S Series is designed using off the shelf motors and drive train
parts. Heavy duty NEMA design motors with a 1.15 to 1.25 service factor
are used to ensure dependable long life.
SIDE BY
SIDE AIR/OIL COOLERS
This arrangement allows for very low approach temperatures vs. less efficient
"stacked" design. This increases overall efficiency and provides
for a cooler running compressor. Thermostatically controlled oil bypass
valve insures proper oil temperature to extend air end life. Side by side
coolers also offer easy access for cleaning.
"R/S" ROTOR PROFILE
INCREASED
EFFICIENCY - The CURTIS "R/S" Profile with it's high precision
finish offers the shortest possible sealing line to ensure minimal internal
losses. This design along with low rotational speeds give you maximum
CFM output per energy dollar. The "R/S" profile allows for
extra CFM output even at pressures as high as 175 PSIG.
LONG
LIFE-LARGE DIAMETER BEARINGS
Large
cylindrical roller bearings are designed for years of continuous service.
Precision ball bearings with angular thrust contact provides twice
the needed thrust loading. Bearings are a significant part of any
air end and Curtis puts an emphasis on their long life bearings.
OIL
SEPARATORS
VERTICAL
MULTI-STAGE SEPARATION - First stage separation is achieved by offset
air/oil inlet and special baffling which centrifugally separates 95% of
oil from air.
Second stage
separator element is sized so that even under maximum capacity flow, the
velocity through the filter is less than 1 ft./sec. for maximum efficiency.
Our separator element will last longer due to our unique oversized design.
This oil separation system provides virtually oil-free air.
ASME CODED,
VERTICAL SEPARATOR TANK saves space and reduces turbulence to prevent
oil carryover. Separator tank is equipped with oil-fill vent plug, oil
level sight glass, safety relief valve, and minimum pressure check valve.
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