Type WF

Water-filled fluid couplings (WF / WFDF / WFDX) — steel-body constant-fill couplings for clean, fixed-speed soft starting.

Description

A constant-fill coupling built for water.

Type WF are steel-body constant-fill fluid couplings with a hollow-shaft execution on one end and a flexible coupling on the other for the respective shaft connections. They are available with a delayfil chamber as type WFDF and without delayfil as type WF.

A radially-displaceable execution is also offered, carrying a metallic-disc flexible coupling on both ends (WF HF / WFDX). These metallic-disc couplings need no lubrication and demand the least maintenance, while the weight of the coupling is shared between the motor and the driven machine — reducing the weight reaction on gearbox shafts, which are of small diameter in modern designs.

Fluidomat Type WF water-filled fluid coupling

Key data

200–270%
Adjustable starting torque (WF)
2–5%
Operating slip
375
KW max rating (WF-566)
3
Fluids: water, emulsion, oil
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Specification

Engineered for demanding fluids.

Type WF HF couplings are radially displaceable, carrying a metallic-disc flexible coupling on both the input and output ends. Because the coupling weight is shared by the motor and driven machine shaft, the load reaction on slender gearbox shafts is minimised. The maximum torque-transmitting capacity is adjustable between 200% and 270% for type WF and 180% to 270% for WFDF.

Type WF couplings are suitable for operation with the following media:

  • Water (aqua)
  • Water–oil emulsion to HFB classification of the European Mines Safety Commission
  • Mineral oil
Advantages

All the benefits of a Fluidomat coupling

Type WF offers every advantage and performance characteristic of the aluminium-body Fluidomat fluid couplings.

  • Virtually no-load start and run-up of the motor, with peak motor torque used for load acceleration
  • Smooth, controlled acceleration of the driven machine
  • Quick decay of the motor starting-current kick
  • Adjustable starting characteristics and load limiting
  • Dampening of shock loads, torsional fluctuations and vibrations
Selection data

Rating table — WF / WFDF

Maximum ratings in KW at different input speeds (RPM). For final selection, please consult Fluidomat application engineering.

Maximum rating (KW) by input speed — Type WF / WFDF
Model6007509001000120015001800
WF-411.83481522
WF-3602.65912204060
WF-547.51318315580
WF-65.61119264575114
WF-71019334578140197
WF-814.4284866115205290
WF-56620406893161315375
WF-93364111152262373—

Ratings apply to types WF and WFDF. Full dimension tables, flexible-coupling references and oil quantities for the WF / WFDF / WFDX range are available in the WF catalogue.

Selection data

Technical specification & dimensions

Full dimension, connected-flexible-coupling, brake-drum and mass-moment-of-inertia data, as published by Fluidomat.

Dimension Table WF/ WFDF/ WFDX

ModelABø d4 MaximumL4Threads 'M' BSWFlexible Coupling Model
WF-438015442801"FFX-1
WFDF-438024042801"FFX-1
WF-360436220551121"FFX-3
WFDF-360436316551121"FFX-3
WF-5470235751351"FFX-3
WFDF-5470280751351"FFX-3
WF-6512253851401 1/4"FFX-4
WFDF-6512328851401 1/4"FFX-4
WFDX-6512373851401 1/4"FFX-4
WF-7570237951551 1/2"FFX-4
WFDF-7570315951551 1/2"FFX-4
WFDX-7570335951551 1/2"FFX-4
WF-86202911001701 1/2"FP-1
WFDF-86203701001701 1/2"FP-1
WFDX-86204511001701 1/2"FP-1
WF-5666443131101721 1/2"FP-1
WFDF-5666443921101721 1/2"FP-1
WFDFDX-5666444731101721 1/2"FP-1
WF-9730342120200ø50-8PFP-2
WFDF-9730494120200ø50-8PFP-2
WF-10776405120200ø50-8PFP-2
WFDF-10776590120200ø50-8PFP-2

Connected Flexible Coupling

Flexible Coupling ModelInternal HubExternal HubPad Type Coupling
ød1 Max.Ø 1L1ød2 Max.Ø 2L2ød3 Max.Ø 3L3
FFX-14267676075130———
FFX-380927290110170———
FFX-49010287100120195———
FFX-5——125150230———
FP-1——————100110120
FP-2——————140155167

Dimension Table WF HF /WF HFD / WF HFDX/ Wfdfdx

FLUID COUPLING MODELø ABø d 1 MAXØ 1ø d 4 MAXØ 4Flex Coupling Model FXC
WFHF-438027855705570FXC-II
WFHFD-438036455705570FXC-II
WFHF-36043635075957595FXC-IIIA
WFHFD-36043644675957595FXC-IIIA
WFHF-547038075957595FXC-IIIA
WFHFD-547050075957595FXC-IIIA
WFHF-651238490958095FXC-III
WFHFD-651245890958095FXC-III
WFHFDX-651250490958095FXC-III
WFHF-75704029011090110FXC-III
WFHFD-75704809011090110FXC-III
WFHFDX-75705029011090110FXC-III
WFHF-8620470110125110125FXC-IVA
WFHFDF-8620550110125110125FXC-IVA
WFHFDX-8620630110125110125FXC-IVA
WFHF-566644500110125110125FXC-IVA
WFHFD-566644578110125110125FXC-IVA
WFDFDX-566644659110125110125FXC-IVA
WFHFDX-566730543110125110125FXC-IVA
WFHFD-9730695110125110125FXC-IVA
WFHF-10776629115125120125FXC-IV
WFHFD-10776814115125120125FXC-IV
Construction & diagrams

Diagrams & views

Fluidomat Type WF
Fluidomat Type WF
Fluidomat Type WF
Fluidomat Type WF
Fluidomat Type WF
Fluidomat Type WF
Type WF
Type WF
Type WF HF/WF HFD/WF Hfdx
Type WF HF/WF HFD/WF Hfdx
Flexible Coupling
Flexible Coupling
Typical applications

Proven across rotating equipment

Belt conveyors Crushers Centrifugal pumps Fans & blowers Ball & rod mills Compressors Mine drives Material handling
Constant-Fill CouplingsFixed-speed soft-start range Variable Speed ScoopStepless speed control, energy saving Catalogues & downloadsWF datasheets & dimension tables

Need a water-filled coupling for your drive?

Send us your motor rating, speed and driven-machine details and we’ll recommend the right WF, WFDF or WFDX model.

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