SAMIFLEX COUPLINGS

Method

Data required for coupling selection:

• Application details (for service factor)
• Horsepower and RPM of the driver
• Shaft details of the driving and driven equipment

1. Determine the service factor (SF) from the application and classification list below.
2. Calculate the maximum HP/100 RPM rating: HP/100 rpm = (HP x 100 x SF)/RPM Select the coupling which has a higher max rating.
3. Compare the maximum RPM capacity & bore requirements to the catalog limits for the coupling selected
   
   

Example

Driver: water turbine (100 HP at 1800 rpm)
Driven equipment: screw compressor
Turbine bore: 2.38”      Compressor bore: 2.00”

Distance between shaft ends (DBSE): 5”

Service factor for the water turbine & screw compressor: SF=2

HP/100 RPM = (100 HP x 100 x 2) / 1800
HP/100 RPM = 11.1

Coupling selection based on max rating: A4B 
Coupling bore capacity: 2-7/8”
The maximum speed for A4B is 3275 RPM unbalanced

DBSE for A4B is 5”.  A4B is acceptable in this application