Type Alfa-P Fluid Coupling

Description

Constant-fill power, designed for belt drives.

Fluidomat Type Alfa-P is a constant-fill, fixed-speed fluid coupling built for belt-drive applications. It is offered in different executions — with or without a delay-fill chamber — to match the starting characteristics of the driven machine.

Alfa-P couplings can be supplied without a pulley: within the specified range, the buyer can manufacture and fit the pulley at their own end. This gives real flexibility for stocking, and lets pulleys of different specification run on the same coupling.

Each coupling is suitable for two consecutive starts from hot and three from cold. A fusible plug provides thermal protection, blowing off at 130°C as standard (160°C optional). The recommended lubricant is Turbine Oil ISO VG 32.

Fluidomat Type Alfa-P belt-drive coupling

Key data

85

KW max rating (model 7 @ 1800 RPM)

2–5%

Operating slip

130°C

Fusible plug blow-off (std)

3

Executions: P / PD / PDX

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Specification

Built-in features of every Alfa-P coupling

Belt-drive configuration in P, PD and PDX executions — with or without a delay-fill chamber to suit the load
Supplied with or without pulley; pulleys within the tabulated range can be made and installed by the buyer
Flexible stocking — pulleys of different specification can run on the same coupling
Rated for two consecutive starts from hot and three from cold

Fusible plug blow-off temperature 130°C as standard, 160°C optional
Operating lubricant: Turbine Oil ISO VG 32
Smooth, soft starting that limits torque and absorbs shock loads and torsional vibration
Five frame sizes (models 3 to 7) covering belt-driven duties up to 85 KW

Selection data

Rating table — Alfa-P

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

Maximum rating (KW) by input speed — Type Alfa-P
Model	600	730	900	970	1200	1470	1800
3	—	1.3	2.4	3	6	11	18
4	1	2	4	5	9	16.5	22
5	2	4	7	9	16.3	30	42
6	3	5	9	11	22	40	60
7	4	8	15	18	34	62	85

Full dimension tables, pulley details, dry weights and oil quantities for the P, PD and PDX executions are available in the Alfa-P 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 HDP, PD, PDX

Coupling Model HD-P P/PD/PDX	PCD		øD	øA	B			Ød1 max	l1	Dry Wt. in Kgs			Max Oil fillings in litre			Threads “M” BSW
Coupling Model HD-P P/PD/PDX	D3	D4	øD	øA	P	PD	PDX	Ød1 max	l1	P	PD	PDX	P	PD	PDX	Threads “M” BSW
3	175	120	65	342	281	343	382	42	110	24	27	28	2.8	3.2	3.2	3/4"
4	175	120	75	367	285	353	382	50	110	30	34	35	3.8	4.2	4.2	3/4"
5	215	140	90	406	356	413	463	65	142	40	44	45	4.9	5.4	5.4	1”
6	255	162	100	435	395	456	522	65	142	55	59	61	5.6	7.1	7.1	1”
7	255	162	110	471	405	464	541	75	142	66	71	73	8.3	8.8	8.8	11/2"

Pulley Details TYPE-1 & TYPE-2

MODEL	SEC	PULLEY TYPE-1			K1	SEC	PULLEY TYPE-2			k1	k2
		"D" PCD		NO. OFF GROOVE			"D" PCD		NO. OFF GROOVE
		MIN Ø	MAX Ø	NO. OFF GROOVE			MIN Ø	MAX Ø	NO. OFF GROOVE
ALFA P/PD/PDX 3& 4	B	Ø115	Ø145	4	7.3	B	Ø145	Ø172	2	15	33.5
	C	Ø120	Ø140	3	5	C	Ø140	Ø180	2	1	33.5
	SPA	Ø115	Ø145	5	8.5	SPA	Ø145	Ø172	3	9	33.5
	SPB	Ø120	Ø145	4	7.3	SPB	Ø140	Ø180	2	15	33.5
	SPC	Ø130	Ø140	3	5	SPC	Ø140	Ø190	2	1	33.5
ALFA P/PD/PDX 5	B	Ø130	Ø180	6	10.6	B	Ø180	Ø200	4	18	39.0
	C	Ø140	Ø180	4	20.9	C	Ø180	Ø210	3	16.5	39.0
	SPA	Ø130	Ø180	7	19	SPA	Ø180	Ø200	6	4.5	39.0
	SPB	Ø135	Ø180	6	10.6	SPB	Ø180	Ø210	4	18	39.0
	SPC	Ø145	Ø180	4	20.9	SPC	Ø180	Ø220	3	16.5	39.0
ALFA P/PD/PDX 6 & 7	B	Ø150	Ø220	7	16.3	B	—	—	—	—
	C	Ø160	Ø220	5	20.6	C	—	—	—	—
	SPA	Ø150	Ø220	9	14.5	SPA	—	—	—	—
	SPB	Ø160	Ø220	7	16.3	SPB	—	—	—	—
	SPC	Ø170	Ø220	5	20.6	SPC	—	—	—	—

Pulley Details TYPE-3 & TYPE-4

SEC	PULLEY TYPE-3			K1	SEC	PULLEY TYPE-4			K1
	"D" PCD		NO. OFF GROOVE			"D" PCD		NO. OFF GROOVE
	MIN Ø	MAX Ø	NO. OFF GROOVE			MIN Ø	MAX Ø	NO. OFF GROOVE
B	Ø172	Ø230	4	17.3	B	Ø235	Ø320	4	22
C	Ø180	Ø235	3	15	C	Ø240	Ø320	3	20.6
SPA	Ø172	Ø230	5	18.5	SPA	Ø235	Ø320	5	23.5
SPB	Ø180	Ø235	4	17.3	SPB	Ø240	Ø320	4	22
SPC	Ø190	Ø245	3	15	SPC	Ø250	Ø320	3	20.6
B	Ø200	Ø270	7	5	B	Ø275	Ø350	7	10
C	Ø210	Ø270	5	9.3	C	Ø285	Ø350	5	14.3
SPA	Ø200	Ø270	8	18	SPA	Ø280	Ø350	8	23.3
SPB	Ø210	Ø270	7	5	SPB	Ø285	Ø350	7	10
SPC	Ø220	Ø270	5	9.3	SPC	Ø295	Ø350	5	14.3
B	Ø225	Ø320	8	11.3	B	Ø325	Ø400	8	14.3
C	Ø225	Ø320	6	9.15	C	Ø325	Ø400	6	16.3
SPA	Ø225	Ø320	10	13.5	SPA	Ø325	Ø400	10	14.15
SPB	Ø225	Ø320	8	11.3	SPB	Ø325	Ø400	8	16.3
SPC	Ø225	Ø400	6	9.15	SPC	Ø335	Ø400	6	14.3

Pulley Mounting Details

COUPLING MODEL HDP P/PD/PDX	LOCATING DIA FOR PULLEY		PULLEY MOUNTING PCD		"R"			. N	. J	. M
COUPLING MODEL HDP P/PD/PDX	TYPE - 1 , 2 3 D5	TYPE - 4 D6	D3	D4	TYPE - 1 2	TYPE - 3	TYPE - 4	. N	. J	. M
3	145	207	175	120	4	5	5	8	10	M10
4	145	207	175	120	4	5	5	8	10	M10
5	180	255	215	140	5	7	5	8	10	M10
6	220	295	255	162	5	7	5	8	10	M10
7	220	295	255	162	5	7	5	8	10	M10

Construction & diagrams

Diagrams & views

Typical applications

Proven across belt-driven equipment

Belt conveyors Crushers Fans & blowers Centrifugal pumps Compressors Mixers & agitators Screens & feeders Material handling

Constant-Fill CouplingsFixed-speed soft-start range Variable Speed Scoop (SC)Energy-saving stepless control Catalogues & downloadsDimension & selection data

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