Service & Support

Frequently Asked Questions

FS-Curtis Air Compressor Technical Bulletins are available by calling Customer Service at 314-383-1300.

WHAT IS THE CORRECT DIRECTION FOR MY AIR COMPRESSOR TO ROTATE?
For the Reciprocating compressor whether the ML-Series (Master-Line) or the CA-Series (Challenge-Air) the correct rotation is counter-clockwise facing the flywheel.  The Large Industrial models with an oil pump are bi-directional.  The oil pump will produce oil pressure in either direction. For the Rotary Screw compressors there are arrow decals on the belt guard and also directional arrows cast in the air housings by the male rotor shaft. 

WHAT IS THE OIL CAPACITY FOR MY COMPRESSOR?
For the CA-Series (Challenge-Air) Compressors (click here)
For the ML-Series (Master-Line) Compressors (click here)
For the CT-Series Compressors (click here)
For the Rotary Screw Compressors, Models R/S, R/S-T 10-50 (click here)
For the Rotary Screw Compressors, Models R/S-D 50-300 (click here)
For the KS Series Rotary Screw Compressors Models KS10-50 (click here)
   
HOW DO I REVERSE ROTATION ON A THREE-PHASE MOTOR?
Normally two of the incoming power lines are switched between Line 1 and Line 3.
 
I AM HAVING TROUBLES WITH MY RECIPROCATING COMPRESSOR AND NEED SOME TROUBLESHOOTING ASSISTANCE.
WHAT IS A NORMAL OIL CHANGE INTERVAL?
A. For the Reciprocating Compressor, normal oil changes should be done every 3 months.  Oil change frequency also depends on the operating schedule of the compressor.  3 month time frame is base on a 8 hour, 5 day work week.  For Rotary Screw Compressors using the RS8000 oil, the change interval is every 8000 hours provided the air/oil discharge temperature does not exceed 190°F.   For every 10° rise over 190°F the oil loses 2000 hours of life.  Rotary Screw Compressors using the RS2000 oil, change interval is 2000 hours.
 
WHAT SIZE PIPING DO I NEED TO GET PROPER CFM?
(click here for piping size)
 
I AM LOOKING FOR THE AIR STRAINER ELEMENT(S) OR AIR STRAINER ASSEMBLY FOR CA-Series COMPRESSOR PUMP?
Click Model of compressor below you are seeking.


 

I AM INSTALLING A SIMPLEX COMPRESSOR.  WHAT IS THE AMPERAGE OF THE MOTOR, SIZE OF CIRCUIT BREAKER OR FUSED DISCONNECT DO I NEED, ALSO WHAT WIRE SIZE IS NEEDED?   
click here for FS-Curtis Air Compressor Electrical Data Information Chart.

I HAVE A COMPRESSOR OUTFIT AND NEED TO CONNECT IT TO AN ELECTRICAL SUPPLY.  WHAT SIZE CIRCUIT BREAKER OR FUSED DISCONNECT AND WIRE SIZE DO I NEED? 
click here for FS-Curtis Electrical Data Sizing Chart-Amps-Circuit Breakers Chart

I AM INSTALLING A DUPLEX COMPRESSOR WITH AN ALTERNATOR PANEL SINGLE POWER SUPPLY.  WHAT ARE MY ELECTRICAL REQUIREMENTS?
click here Duplex Outfit with alternator, single source power supply.

I AM INSTALLING A SIMPLEX OUTFIT OR ROTARY SCREW OUTFIT OR A DUPLEX OUTFIT WITH ALTERNATOR PANEL AND DUAL POWER SUPPLY.  WHAT ARE MY ELECTRICAL REQUIREMENTS?
click here for Simplex, Rotary Screw, Duplex Outfits with Alternator Panel with Dual Power source.