fluid coupling

  steel-cased-fluid-coupling-500x500.jpg

 

  CHARACTERISTEC
  Type PFC
The type PFC fluid coupling when used in conjuction with a fixed-speed motor will give the motor a light-load start, provide smooth acceieration
and ensure overload protection for the motor and driven machine. Using a fluid coupling in the drive-line often makes its possible to employ a 
smaller motor, because the fluid coupling will allow the motor to run quickly up to speed, where its overload capacity may be used for starting 
the machine. 

Starting or stalling torque may be determined precisely by selection of the initial Oil filling. Further adjustment to suite drive requirement, may easily 
be made at site, The type PFC fluid coupling is a compact, rugged unit, the major components being aluminum alloy castings. It comprises the 
basic fluid coupling, diaphragm input mounting and multidisc, semi-flexbil coupling on the output side. Bores and keyways may be finished to suit customer's requirements. 

Fusible plugs are fitted to all but the smaller fluid couplings to provide protection against excess temperature rise should the motor overload trip fall to
operate during stall or overload conditions. Vertical applications can be catered for in most sizes.
 
  DIMENSIONS
  - Constant Filling Fluid Couplings
 
 
 
Size Max. operating kW rating at various motor speeds.
  580 720 960 1450
8   0.29 0.96 2.36
10.5 0.59 1.13 2.68 9.21
11.5 0.96 1.83 4.35 14.01
12.75 1.64 3.13 7.53 26.10
14.5 3.0 5.67 13.42 46.20
16.25 5.44 10.44 24.76 75.0
17.75 8.13 15.51 37.29 120.00
20 15.73 30.13 75.00 151.00
23 30.00 56.70 130.00 275.00
26 58.20 112.00 210.00  
29 101.00 187.00 340.00  
32 155.00 271.00 420.00  
36 273.00 345.00 725.00  
41 410.00 634.00 10000.00  
 
  The above chart may be used for selecting a type PTC fluid coupling. It shows maximum operating power ratings for approved applications with 
direct-on started squirrel cage motors, and will allow 200% full load forque for starting.
Selections may be differenet from those shown, for drives having frequent cyclic duty, very high inertia starting, or diesel engine drive, such cases
should be referred fo Greaves Ltd. Regional Branch / Overseas office or representative who will prepare specific proposals. These rating are also
generally suitable for drives employing slip-ring motors, for drives using DC motors consult Greaves Ltd. Allow for 3% to 5% slip in fluid coupling-low 
to high loadings.
 
 
 
 
PFC Dimensions in min
Size A C D E Weight(kg) GD²
8 237 42 35 165 13.2 0.246
10.5 308 48 48 210 22.2 0.54
11.5 333 60 60 232 35 0.75
12.75 368 60 60 262 41 1.38
14.5 419 80 70 287 57.6 2.53
16.25 454 80 70 335 74 4.2
17.75 505 85 83 354 106 6.4
20 578 85 83 390 142 11.5
23 660 110 100 457 207 23
26 749 110 100 492 272 38
29 838 130 125 552 358 65
32 914 130 125 587 520 95
36 1032 150 150 626 678 182
41 1162 150 150 660 948 316
 
 
  - Constant Filling Fluid Couplings
 
  The above chart may be used for selecting a type FP fluid coupling. It shows maximum operating power ratings for approved applications with 
direct-on started squirrel cage motors, and will allow 200% full load forque for starting.
Selections may be differenet from those shown, for drives having frequent cyclic duty, very high inertia starting, or diesel engine drive, such cases 
should be referred fo our representative who will prepare specific proposals.

These rating are also generally suitable for drives employing slip-ring motors, for drives using DC motors consult our representative. 
Allow for 3% to 5% slip in fluid coupling-low to high loadings.

Coupling to work at higher powers or speeds than those indicated can be supplied.

 
 
 
Size A B D H N Weight(kg) No.of grrves
FP.7 211 176 30 6 140 9.5 2
FP.8 237 178 30 36 140 11.3 2
FP.9 268 192 35 48 152 15.9 2
FP.10 308 217 40 67 165 22.7 3
FP.11 333 246 48 82 170 31 4
FP.12 368 281 60 82 200 44 4
FP.14 419 326 60 101 200 59 5
FP.16 454 402 80 162 250 92 6
FP.17 502 40 480 162 250 108 6
 
  ※ These models are not manufactured at present