Type HF / HFD / HF-DX Fluid Coupling

Description

Constant-fill, fixed-speed couplings built for easy alignment.

The Fluidomat Type HF range is a constant-fill (fixed-speed) fluid coupling that is radially displaceable — driving and driven shafts can be pre-aligned, and the coupling fitted or removed, without disturbing either machine. A metallic disc flexible coupling is provided on both the input and output sides.

To match the starting and running characteristics of industrial machines, Fluidomat offers three circuit types that deliver starting torque down to 120% of nominal torque. Type HF is the basic coupling without a delay-fill chamber; Type HFD adds a delay-fill chamber; and Type HF-DX uses an extended delay-fill chamber for the lowest starting torque. All offer normal operating slip of 2–5% depending on size and torque setting.

Fluidomat Type HF / HFD / HF-DX fluid coupling

Key data

120%

Min. starting torque (HF-DX)

2–5%

Normal operating slip

130°C

Fusible plug blow-off (std)

2000

KW max rating (HF-16 DC)

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Specification

Three circuit types, one rugged platform

Choose the circuit that matches your machine's starting duty — each is built on the same radially displaceable construction.

Type HF (basic, no delay-fill chamber): starting torque adjustable from 180% to 275% of nominal
Type HFD (delay-fill chamber): starting torque adjustable from 150% to 275%
Type HF-DX (extended delay-fill chamber): starting torque adjustable from 120% to 270%
Normal operating slip of 2% to 5%, depending on coupling size and starting torque value

Fusible plug blow-off temperature of 130°C as standard; 160°C optional
Suitable for two consecutive starts from hot and three from cold
Radially displaceable design enables pre-alignment and easy fitting or removal
Metallic disc flexible coupling on input and output; outer-wheel brake-drum mounting available

Brake-drum (outer-wheel drive) option. For braked drives, the HF range can be supplied with an outer-wheel brake-drum mounting. Because the coupling is radially displaceable, the brake drum is shifted by a defined dimension during removal — so ensure the machine or gearbox shaft length leaves adequate space for this shift.

Selection data

Rating table — HF / HFD / HF-DX

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

Maximum rating (KW) by input speed — Type HF / HFD / HF-DX
Model	600	730	900	970	1200	1470	1800	3000*	3600*
HF-1	—	0.5	0.9	1.2	2.2	4	7.5	20	26
HF-2	—	0.9	1.7	2.2	4.1	7.5	13.7	30	36
HF-3	—	1.3	2.4	3	6	11	18	38	45
HF-4	1	2	4	5	9	16.5	22	45	—
HF-5	2	4	7	9	16.3	30	42	70	—
HF-6	3	5	9	11	22	40	60	110	—
HF-7	4	8	15	18	34	62	85	140	—
HF-8	6	10	18	23	44	80	120	—	—
HF-8 B	9	16	29	36	68	125	180	—	—
HF-9	12	22	41	52	98	172	246	—	—
HF-10	22	39	73	91	172	275	370	—	—
HF-10 B	32	57	107	134	253	373	500	—	—
HF-11	47	85	158	198	374	525	775	—	—
HF-12	82	148	278	348	600	750	—	—	—
HF-13	163	293	550	620	850	1100	—	—	—
HF-16	583	1050	1400	1500	—	—	—	—	—
HF-16 DC	900	1500	1862	2000	—	—	—	—	—

Couplings for 3000 RPM should be selected only after Fluidomat's approval is obtained. Full dimension tables, dry weights, oil filling and brake-drum data are available in the HF catalogue.

Selection data

Technical specification & dimensions

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

Technical Specification and Dimension Table for HF,HFD,HF-DX Couplings

Model HF,HFD,HF-DX	ø A	B			ø d1 ød4 max	Ø 1 & Ø 4	* Dry Weight			Max. Oil Filling In Litres			Connected Flexible Coupling Model
Model HF,HFD,HF-DX	ø A	HF	HFD	HF-DX	ø d1 ød4 max	Ø 1 & Ø 4	HF	HFD	HF-DX	HF	HFD	HF-DX	Connected Flexible Coupling Model
3	342	239	295	329	55	70	25	28	29	2.9	3.9	4.3	FXC-I
4	367	264	320	354	60	70	34	37	39	3.8	4.3	4.6	FXC-II
5	406	285	315	375	60	70	48	51	54	4.9	5.8	6.7	FXC-II
6	435	332	358	429	75	95	64	67	70	6.5	7.7	9.6	FXC-IIIA
7	471	345	390	460	75	95	81	84	86	8	9.4	11.3	FXC-IIIA
8	505	366	407	487	90	95	96	102	107	9.7	11.5	14.8	FXC-III
8 B	553	405	445	535	90	110	116	122	127	14.5	16.1	19.1	FXC-III
9	584	395	445	526	90	110	124	130	135	16.1	19.3	20.8	FXC-III
9 B	620	446	511	589	110	125	168	180	184	19.4	21.5	24.7	FXC-IV A
10	644	468	517	611	110	125	172	184	188	25.1	28.1	33.9	FXC-IV A
10 B	714	491	537	632	110	125	217	233	237	31.8	36.5	45.4	FXC-IV A
11	751	511	566	661	115	125	281	292	300	37.1	42.9	49	FXC-IV
12	845	614	700	820	145	200	400	421	430	51.3	65.6	71.5	FXC-V
13	960	697	745	875	145	200	570	596	605	72.4	91.3	106.6	FXC-V
14	1104	770	813	943	220	200	640	688	703	114.7	131.9	153.9	FXC-VI
15	1230	777	886	1016	220	200	810	880	900	147.6	181.4	193.1	FXC-VI
16	1298	882	965	1095	220	200	1280	1320	1380	189.2	241.7	268.4	FXC-VI

Brake Drum Mounting (Outer Wheel Drive) Fluid Coupling Model HF,HFD,HF-DX

Flexible Coupling Model	Metallic Disc Coupling
Flexible Coupling Model	øE	C	Y	K* Min
FXC-I	160	75	21	26
FXC-I	200	75	21	26
FXC-II	200	75	19	26
FXC-II	250	95	10	35
FXC-III A	250	95	35	35
	300	118	32	55
	315	118	32	55
FXC-III	250	95	48	35
	300	118	30	55
	315	118	30	55
	400	150	18	73
FXC-IV A	300	118	52	55
	315	118	52	55
	400	150	40	65
	500	190	5	70
FXC-IV	400	150	40	65
	500	190	5	70
	600	236	(-)31	80
	630	236	(-)31	80
FXC-V	500	190	70	70
	600	236	34	70
	630	236	34	70
	710	265	25	90

Mass Moment of Inertia "J" with Oil in kg·m²

Model	Outer Wheel	Inner Wheel
HF-3	0.25	0.05
HF-4	0.39	0.07
HF-5	0.66	0.23
HF-6	0.69	0.29
HF-7	1.32	0.35
HF-8	1.72	0.49
HF-8B	2.4	0.64
HF-9	2.82	0.76
HF-9B	4.65	1.91
HF-10	5.01	2.11
HF-10B	10.15	3.34
HF-11	11.66	3.93
HF-12	18.3	7.31
HF-13	35.74	14.25
HF-14	61.46	24.1
HF-15	93.13	37.24
Model	Outer Wheel	Inner Wheel
HFD-3	0.26	0.05
HFD-4	0.41	0.07
HFD-5	0.71	0.24
HFD-6	0.97	0.3
HFD-7	1.46	0.4
HFD-8	1.85	0.51
HFD-8B	2.61	0.72
HFD-9	3.06	0.93
HFD-9B	5.09	1.96
HFD-10	6.07	2.18
HFD-10B	11.3	3.44
HFD-11	12.97	4.07
HFD-12	20.33	7.61
HFD-13	39.82	14.78
HFD-14	68.04	24.98
HFD-15	102.7	38.61
HFD-16	—	—
Model	Outer Wheel	Inner Wheel
HFDX-3	0.27	0.05
HFDX-4	0.42	0.07
HFDX-5	0.74	0.24
HFDX-6	1.04	0.3
HFDX-7	1.59	0.4
HFDX-8	1.96	0.51
HFDX-8B	2.76	0.72
HFDX-9	3.24	0.93
HFDX-9B	5.55	1.96
HFDX-10	7.04	2.18
HFDX-10B	12.3	3.44
HFDX-11	14.07	4.07
HFDX-12	21.93	7.61
HFDX-13	43.02	14.78
HFDX-14	73.14	24.98
HFDX-15	—	—

Construction & diagrams

Diagrams & views

Brake Drum Mounting Type HF/HFD/HF-DX with Brake Drum (Outer Wheel Drive)

Typical applications

Proven across rotating equipment

Belt conveyors Crushers Centrifugal pumps ID / FD fans Ball & rod mills Mixers & agitators Screens & feeders Compressors

Constant-Fill CouplingsFixed-speed soft-start range Variable Speed ScoopStepless, energy-saving control Catalogues & drawingsHF dimension & selection data

Need the right HF coupling for your drive?

Send us your motor rating, speed and driven-machine duty and our engineers will recommend the correct HF, HFD or HF-DX model.

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