BECA 552M

Aerospace seals / Piston seals

BECA 552M

Description

The BECA 552M profile is a double acting composite piston seal composed of a filled PTFE friction ring with oil passages and a profiled pre-tightened rubber ring. It meets the standards MIL-G-5514F and AS4716.

Advantages

Low friction coefficient
Excellent abrasion and extrusion resistance
Suitable for a reduced size
Housing in line with MIL-G-5514F

Technical data

Temperature	-40°C/+200°C
Pressure	35 MPa
Speed	5 m/s
Medias	Mineral hydraulic oils Fire-resistant liquids Biocompatible fluids Water Others (contact our experts)

Applications

Actuators
Brakes systems
Flight controls
Engine systems
Landing gear

Materials

Friction ring

Bronze-filled PTFE
Carbon-filled PTFE
GL Blue PTFE

Profiled seal

NBR 70 Shore A
FKM 70 Shore A

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Product data - Aerospace piston seal - BECA 552M

Series	Bore diameter	Groove diameter	Groove width
AS4716 / MIL-G-5514	AS4716	MIL-G-5514
ØD1	Ød1	Ød1	L1 min	L2 min	L3 min

Dimensions

Materials

Technical data

Dimensions

Installation drawing Logement Gorge Joint de piston aéronautique - Housing Groove Gland aerospace piston seal BECA 552M

Materials

Friction ring					Profiled seal			Contact surface area
Standard code	ISO code	Material	Colour	Characteristics	Code	Type of material	Service temperature	Contact surface area
DP	P	Virgin PTFE	White	Resistance to chemical products Sealing water Dielectric Non-stick Low friction coefficient Food & Beverage	K6	NBR 70 Shore A	-30°C/+100°C	Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface
					G6	FKM 70 Shore A	-20°C/+200°C
					C6	EPDM 70 Shore A	-40°C/+145°C
					F6	VMQ 70 Shore A	-60°C/+200°C
DC	C	PTFE +25% Carbon	Grey	Improvement Wear properties Compression set Good resistance to chemical products Thermal and electrical conductivity Anti-static Efficient as part of dynamic applications with compression	K6	NBR 70 Shore A	-30°C/+100°C
					G6	FKM 70 Shore A	-20°C/+200°C
					C6	EPDM 70 Shore A	-40°C/+145°C
CG	C	PTFE + 23% Carbon + 2% Graphite	Black		K6	NBR 70 Shore A	-30°C/+100°C
					G6	FKM 70 Shore A	-20°C/+200°C
					C6	EPDM 70 Shore A	-40°C/+145°C
DV	V	PTFE + 25 % Glass	Blue	Improvement Wear properties Mechanical strength Slightly more abrasive but can be corrected with the addition of MOS2 Chemical and dielectric properties preserved Well suited to applications with rotating and simultaneous alternating movements	K6	NBR 70 Shore A	-30°C/+100°C	Steel Chrome steel Cast iron
DV	V	PTFE + 25 % Glass	Blue		G6	FKM 70 Shore A	-20°C/+200°C
VM	M	PTFE + 15 % Glass + 5% MoS2	Grey		K6	NBR 70 Shore A	-30°C/+100°C
VM	M	PTFE + 15 % Glass + 5% MoS2	Grey		G6	FKM 70 Shore A	-20°C/+200°C
DX	X	GL Blue PTFE + Glass + Metal oxides	Turquoise blue	Compression resistant Wear resistant Excellent chemical stability Good thermal conductivity	K6	NBR 70 Shore A	-30°C/+100°C
DX	X	GL Blue PTFE + Glass + Metal oxides	Turquoise blue		G6	FKM 70 Shore A	-20°C/+200°C
DG	G	PTFE + 15% Graphite	Black	Improvement Wear properties Reduced wear on metal parts Self-lubricating Thermal and electrical conductivity Low permeability Good friction coefficient Anti-static Efficient as part of dynamic dynamic applications with self-lubrication	K6	NBR 70 Shore A	-30°C/+100°C	Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface
					G6	FKM 70 Shore A	-20°C/+200°C
					C6	EPDM 70 Shore A	-40°C/+145°C
K1	K	PTFE + 10% Ekonol	Light brown	Improvement Better abrasion resistance Better dimensional stability at high temperatures Use up to 300°C Good friction coefficient and low permeability	K6	NBR 70 Shore A	-30°C/+100°C
					G6	FKM 70 Shore A	-20°C/+200°C
					C6	EPDM 70 Shore A	-40°C/+145°C
K2	K	PTFE 20% Ekonol	Light brown		K6	NBR 70 Shore A	-30°C/+100°C
					G6	FKM 70 Shore A	-20°C/+200°C
					C6	EPDM 70 Shore A	-40°C/+145°C
DB	B	PTFE + 60% Bronze	Dark brown	Improvement Wear properties Deformation and creep resistance Compression resistant Self-lubricating Electrical and thermal conductivity Does not alter metal parts Reduced resistance to certain chemical products Used for dynamic seals with a strong compression and low level of wear	K6	NBR 70 Shore A	-30°C/+100°C	Steel Chrome steel Cast iron
DB	B	PTFE + 60% Bronze	Dark brown		G6	FKM 70 Shore A	-20°C/+200°C
B4	B	PTFE + 40% Bronze	Dark brown		K6	NBR 70 Shore A	-30°C/+100°C
B4	B	PTFE + 40% Bronze	Dark brown		G6	FKM 70 Shore A	-20°C/+200°C

Other grades of materials are available depending on your specificities.

Technical data

Groove widths and extrusion gaps

Series	Groove width			Extrusion gaps F
Series	L1 min - max	L2 min - max	L3 min - max	Extrusion gaps F
010 - 012	2.39 - 2.52	3.81 - 4.06	5.26 - 5.51	0.10
013 - 028	2.39 - 2.52	3.81 - 4.06	5.26 - 5.51	0.13
110 - 128	3.58 - 3.83	4.65 - 4.90	6.22 - 6.47	0.13
129 - 140				0.15
141 - 149				0.18
210 - 223	4.78 - 5.03	5.97 - 6.22	7.72 - 7.97	0.13
224 - 227				0.15
228 - 243				0.18
244 - 247				0.20
325 - 329	7.14 - 7.39	8.48 - 8.73	10.77 - 11.02	0.15
330 - 345				0.18
346 - 349				0.20
425 - 445	9.53 - 9.78	12.07 - 12.32	14.71 - 14.96	0.23
446				0.25
447 - 460				0.28

Tolerances on the bore diameters and groove diameters

Series	Tolerance on bore diameter ØD1	Tolerance on groove diameter Ød1
010 - 012	0/+0.025	-0.025/0
013 - 349	0/+0.050	-0.050/0
425 - 446	0/+0.076	-0.076/0
447 - 460	0/+0.076	-0.100/0

Surface roughness

Roughness	Dynamic surface area	Static surface area	Groove flanks
Ra	0.05 - 0.2 µm	≤ 1.6 µm	≤ 3.2 µm
Rz	0.4 - 1.6 µm	≤ 6.3 µm	≤ 10.0 µm
Rmax	0.63 - 2.5 µm	≤ 10.0 µm	≤ 16.0 µm

Chamfers and radius

Series	Radius		Chamfer
Series	R1 min - max	R2 min - max	C
010 - 028	0.13 - 0.26	0.13 - 0.38	2.00
110 - 149	0.13 - 0.26	0.13 - 0.38	2.50
210 - 222	0.13 - 0.26	0.13 - 0.38	3.00
223 - 247	0.13 - 0.26	0.25 - 0.64	3.50
325 - 349	0.13 - 0.26	0.51 - 0.89	4.00
425 - 460	0.13 - 0.26	0.51 - 0.89	4.50

157 dimensions found

552.A329 Standard request	329	60,15	50,70	50,70	7,14	8,48	10,77
552.A330 Standard request	330	63,32	53,87	53,87	7,14	8,48	10,77
552.A331 Standard request	331	66,50	57,05	57,05	7,14	8,48	10,77
552.A332 Standard request	332	69,67	60,22	60,22	7,14	8,48	10,77
552.A333 Standard request	333	72,85	63,40	63,40	7,14	8,48	10,77
552.A334 Standard request	334	76,02	66,57	66,57	7,14	8,48	10,77
552.A335 Standard request	335	79,20	69,75	69,75	7,14	8,48	10,77
552.A336 Standard request	336	82,37	72,92	72,92	7,14	8,48	10,77
552.A337 Standard request	337	85,55	76,10	76,10	7,14	8,48	10,77
552.A338 Standard request	338	88,72	79,27	79,27	7,14	8,48	10,77
552.A339 Standard request	339	91,90	82,45	82,45	7,14	8,48	10,77
552.A340 Standard request	340	95,07	85,62	85,62	7,14	8,48	10,77
552.A341 Standard request	341	98,25	88,80	88,80	7,14	8,48	10,77
552.A342 Standard request	342	101,42	91,97	91,97	7,14	8,48	10,77
552.A343 Standard request	343	104,60	95,15	95,15	7,14	8,48	10,77
552.A344 Standard request	344	107,77	98,32	98,32	7,14	8,48	10,77
552.A345 Standard request	345	110,95	101,50	101,50	7,14	8,48	10,77
552.A346 Standard request	346	114,12	104,67	104,67	7,14	8,48	10,77
552.A347 Standard request	347	117,30	107,85	107,85	7,14	8,48	10,77
552.A348 Standard request	348	120,47	111,02	111,02	7,14	8,48	10,77
552.A349 Standard request	349	123,65	114,20	114,20	7,14	8,48	10,77
552.A425 Standard request	425	126,34	114,22	114,22	9,53	12,07	14,71
552.A426 Standard request	426	129,51	117,40	117,40	9,53	12,07	14,71
552.A427 Standard request	427	132,69	120,57	120,57	9,53	12,07	14,71
552.A428 Standard request	428	135,86	123,75	123,75	9,53	12,07	14,71
552.A429 Standard request	429	139,04	126,92	126,92	9,53	12,07	14,71
552.A430 Standard request	430	142,21	130,10	130,10	9,53	12,07	14,71
552.A431 Standard request	431	145,39	133,27	133,27	9,53	12,07	14,71
552.A432 Standard request	432	148,56	136,45	136,45	9,53	12,07	14,71
552.A433 Standard request	433	151,74	139,62	139,62	9,53	12,07	14,71
552.A434 Standard request	434	154,91	142,80	142,80	9,53	12,07	14,71
552.A435 Standard request	435	158,09	145,97	145,97	9,53	12,07	14,71
552.A436 Standard request	436	161,26	149,15	149,15	9,53	12,07	14,71
552.A437 Standard request	437	164,44	152,32	152,32	9,53	12,07	14,71
552.A438 Standard request	438	170,79	158,67	158,67	9,53	12,07	14,71
552.A439 Standard request	439	177,14	165,02	165,02	9,53	12,07	14,71
552.A440 Standard request	440	183,49	171,37	171,37	9,53	12,07	14,71
552.A441 Standard request	441	189,84	177,72	177,72	9,53	12,07	14,71
552.A442 Standard request	442	196,19	184,07	184,07	9,53	12,07	14,71
552.A443 Standard request	443	202,54	190,47	190,42	9,53	12,07	14,71
552.A444 Standard request	444	208,89	196,77	196,77	9,53	12,07	14,71
552.A445 Standard request	445	215,24	203,12	203,12	9,53	12,07	14,71
552.A446 Standard request	446	227,94	215,82	215,82	9,53	12,07	14,71
552.A447 Standard request	447	240,64	228,52	228,52	9,53	12,07	14,71
552.A448 Standard request	448	253,34	241,22	241,22	9,53	12,07	14,71
552.A449 Standard request	449	266,04	253,92	253,92	9,53	12,07	14,71
552.A450 Standard request	450	278,74	266,62	266,62	9,53	12,07	14,71
552.A451 Standard request	451	291,44	279,32	279,32	9,53	12,07	14,71
552.A452 Standard request	452	304,14	292,02	292,02	9,53	12,07	14,71
552.A453 Standard request	453	316,84	304,72	304,72	9,53	12,07	14,71
552.A454 Standard request	454	329,54	317,42	317,42	9,53	12,07	14,71
552.A455 Standard request	455	342,24	330,12	330,12	9,53	12,07	14,71
552.A456 Standard request	456	354,94	342,82	342,82	9,53	12,07	14,71
552.A457 Standard request	457	367,64	355,52	355,52	9,53	12,07	14,71
552.A458 Standard request	458	380,34	368,22	368,22	9,53	12,07	14,71
552.A459 Standard request	459	393,04	380,92	380,92	9,53	12,07	14,71
552.A460 Standard request	460	405,74	393,62	393,62	9,53	12,07	14,71