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 water-filled couplings

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 (and WFDF / WFDX executions)
WF model6007509001000120015001800
WF 411.83481522
WF 3602.65912204060
WF 547.51318316080
WF 65.61119264580114
WF 71019334578152197
WF 814.4284866115224290
WF 56620406893161315375
WF 93364111152262373500
WF 6624383143196340660750

Maximum ratings in KW at the stated input speed (RPM). Ratings apply to the WF, WFDF and WFDX executions. Full dimension tables and flexible-coupling references are given below.

Selection data

Technical specification & dimensions

Overall and mounting dimensions (mm), thread size and connected flexible-coupling references for the WF and WF HF ranges, as published by Fluidomat.

Dimensions — WF & WFDF / WFDX

Overall dimensions (mm), maximum bore, thread size and connected flexible-coupling model by coupling type.

WF / WFDF / WFDX overall dimensions (mm), thread & flexible coupling
ModelØABØd4 maxℓ4Threads ‘M’ BSWFlexible coupling
WF-437515442741"FFX-1
WF-360418220551121"FFX-3
WFDF-360418315551121"FFX-3
WF-5470250801351"FFX-3
WFDF-5470320801351"FFX-3
WF-6512253851401½"FFX-4
WFDF-6512328851401½"FFX-4
WFDX-6512373851401½"FFX-4
WF-7570277951551½"FFX-4
WFDF-7570355951551½"FFX-4
WFDX-7570377951551½"FFX-4
WF-8620291951701½"FP-1/FFX-5
WFDF-8620370951701½"FP-1/FFX-5
WFDX-8620451951701½"FP-1/FFX-5
WF-5666443131101721½"FP-1/FFX-5
WFDF-5666443921101721½"FP-1/FFX-5
WFDX-5666444731101721½"FP-1/FFX-5
WF-9715367110200Ø50-8P*FP-2A
WFDF-9715425110200Ø50-8P*FP-2A
WFDX-9715508110200Ø50-8P*FP-2A
WF-662760389120240Ø50-8P*FP-2A
WFDF-662760482120240Ø50-8P*FP-2A
WFDX-662760530120240Ø50-8P*FP-2A

All dimensions in mm. ØA outer diameter, B overall length, Ød4 max maximum bore, ℓ4 bore length. * denotes square thread.

Dimensions — WF HF

Radially-displaceable execution with metallic-disc flexible couplings on both ends (WFHF / WFHFD / WFHFDX). Overall dimensions (mm) and connected flexible-coupling model by coupling type.

WF HF / WFHFD / WFHFDX overall dimensions (mm) & flexible coupling
ModelØABØd1 maxℓ1Ød4 maxℓ4Flex coupling FXC
WFHF-438027855705570FXC-II
WFHFD-438036455705570FXC-II
WFHF-36041835075957595FXC-IIIA
WFHFD-36041844675957595FXC-IIIA
WFHF-547037875957595FXC-IIIA
WFHFD-547046575957595FXC-IIIA
WFHF-65123849511095110FXC-III
WFHFD-65124589511095110FXC-III
WFHFDX-65125049511095110FXC-III
WFHF-75704029511095110FXC-III
WFHFD-75704809511095110FXC-III
WFHFDX-75705029511095110FXC-III
WFHF-8620470120125120125FXC-IVA
WFHFD-8620550120125120125FXC-IVA
WFHFDX-8620630120125120125FXC-IVA
WFHF-566644500120125120125FXC-IVA
WFHFD-566644578120125120125FXC-IVA
WFHFDX-566644659120125120125FXC-IVA
WFHF-9715528120125120125FXC-IVA
WFHFD-9715586120125120125FXC-IVA
WFHFDX-9715669120125120125FXC-IVA
WFHF-662760604150200150200FXC-V
WFHFDF-662760689150200150200FXC-V
WFHFDX-662760745150200150200FXC-V

All dimensions in mm. ØA outer diameter, B overall length, Ød1/Ød4 max maximum bore at each end, ℓ1/ℓ4 bore length. FXC = connected metallic-disc flexible-coupling model.

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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