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.A011 Standard request	011	10,72	7,92	7,87	2,39	3,78	5,26
552.A012 Standard request	012	12,32	9,53	9,47	2,39	3,78	5,26
552.A013 Standard request	013	13,97	11,20	11,13	2,39	3,78	5,26
552.A014 Standard request	014	15,57	12,80	12,73	2,39	3,78	5,26
552.A015 Standard request	015	17,15	14,38	14,30	2,39	3,78	5,26
552.A016 Standard request	016	18,75	15,98	15,90	2,39	3,78	5,26
552.A017 Standard request	017	20,32	17,55	17,48	2,39	3,78	5,26
552.A018 Standard request	018	21,92	19,13	19,08	2,39	3,78	5,26
552.A019 Standard request	019	23,50	20,70	20,65	2,39	3,78	5,26
552.A020 Standard request	020	25,17	22,38	22,33	2,39	3,78	5,26
552.A021 Standard request	021	26,75	23,95	23,90	2,39	3,78	5,26
552.A022 Standard request	022	28,35	25,55	25,50	2,39	3,78	5,26
552.A023 Standard request	023	29,92	27,13	27,08	2,39	3,78	5,26
552.A024 Standard request	024	31,52	28,73	28,68	2,39	3,78	5,26
552.A025 Standard request	025	33,10	30,30	30,25	2,39	3,78	5,26
552.A026 Standard request	026	34,70	31,90	31,85	2,39	3,78	5,26
552.A027 Standard request	027	36,27	33,48	33,43	2,39	3,78	5,26
552.A028 Standard request	028	37,87	35,08	35,03	2,39	3,78	5,26
552.A110 Standard request	110	13,97	9,63	9,45	3,58	4,65	6,22
552.A111 Standard request	111	15,57	11,20	11,05	3,58	4,65	6,22
552.A112 Standard request	112	17,15	12,75	12,62	3,58	4,65	6,22
552.A113 Standard request	113	18,75	14,35	14,22	3,58	4,65	6,22
552.A114 Standard request	114	20,32	15,93	15,80	3,58	4,65	6,22
552.A115 Standard request	115	21,92	17,50	17,40	3,58	4,65	6,22
552.A116 Standard request	116	23,50	19,06	18,97	3,58	4,65	6,22
552.A117 Standard request	117	25,17	20,75	20,65	3,58	4,65	6,22
552.A118 Standard request	118	26,75	22,33	22,23	3,58	4,65	6,22
552.A119 Standard request	119	28,35	23,93	22,83	3,58	4,65	6,22
552.A120 Standard request	120	29,92	25,48	25,40	3,58	4,65	6,22
552.A121 Standard request	121	31,52	27,08	27,00	3,58	4,65	6,22
552.A122 Standard request	122	33,10	28,65	28,58	3,58	4,65	6,22
552.A123 Standard request	123	34,70	30,25	30,18	3,58	4,65	6,22
552.A124 Standard request	124	36,27	31,83	31,75	3,58	4,65	6,22
552.A125 Standard request	125	37,87	33,43	33,35	3,58	4,65	6,22
552.A126 Standard request	126	39,45	35,00	34,93	3,58	4,65	6,22
552.A127 Standard request	127	41,05	36,60	36,53	3,58	4,65	6,22
552.A128 Standard request	128	42,62	38,18	38,10	3,58	4,65	6,22
552.A129 Standard request	129	44,22	39,78	39,70	3,58	4,65	6,22
552.A130 Standard request	130	45,85	41,43	41,33	3,58	4,65	6,22
552.A131 Standard request	131	47,42	43,00	42,90	3,58	4,65	6,22
552.A132 Standard request	132	49,02	44,60	44,50	3,58	4,65	6,22
552.A133 Standard request	133	50,60	46,18	46,08	3,58	4,65	6,22
552.A134 Standard request	134	52,20	47,78	47,68	3,58	4,65	6,22
552.A135 Standard request	135	53,80	49,38	49,28	3,58	4,65	6,22
552.A136 Standard request	136	55,37	50,95	50,85	3,58	4,65	6,22
552.A137 Standard request	137	56,97	52,55	52,45	3,58	4,65	6,22
552.A138 Standard request	138	58,55	54,13	54,03	3,58	4,65	6,22
552.A139 Standard request	139	60,15	55,73	55,63	3,58	4,65	6,22
552.A140 Standard request	140	61,72	57,30	57,20	3,58	4,65	6,22
552.A141 Standard request	141	63,32	58,90	58,80	3,58	4,65	6,22
552.A142 Standard request	142	64,90	60,48	60,38	3,58	4,65	6,22
552.A143 Standard request	143	66,50	62,08	61,98	3,58	4,65	6,22
552.A144 Standard request	144	68,07	63,65	63,55	3,58	4,65	6,22
552.A145 Standard request	145	69,67	65,25	63,15	3,58	4,65	6,22
552.A146 Standard request	146	71,25	66,83	66,73	3,58	4,65	6,22
552.A147 Standard request	147	72,85	68,43	68,33	3,58	4,65	6,22
552.A148 Standard request	148	74,42	70,00	69,90	3,58	4,65	6,22
552.A149 Standard request	149	76,02	71,60	71,50	3,58	4,65	6,22
552.A210 Standard request	210	25,17	19,05	19,00	4,78	5,97	7,72
552.A211 Standard request	211	26,75	20,62	20,57	4,78	5,97	7,72
552.A212 Standard request	212	28,35	22,20	22,17	4,78	5,97	7,72
552.A213 Standard request	213	29,92	23,77	23,75	4,78	5,97	7,72
552.A214 Standard request	214	31,52	25,37	25,35	4,78	5,97	7,72
552.A215 Standard request	215	33,10	27,03	26,92	4,78	5,97	7,72
552.A216 Standard request	216	34,70	25,55	28,52	4,78	5,97	7,72
552.A217 Standard request	217	36,27	30,12	30,10	4,78	5,97	7,72
552.A218 Standard request	218	37,87	31,72	31,70	4,78	5,97	7,72
552.A219 Standard request	219	39,45	33,30	33,27	4,78	5,97	7,72
552.A220 Standard request	220	41,05	34,90	34,87	4,78	5,97	7,72
552.A221 Standard request	221	42,62	36,47	36,45	4,78	5,97	7,72
552.A222 Standard request	222	44,22	38,07	38,05	4,78	5,97	7,72
552.A223 Standard request	223	47,42	41,28	41,25	4,78	5,97	7,72
552.A224 Standard request	224	50,60	44,45	44,42	4,78	5,97	7,72
552.A225 Standard request	225	53,80	47,65	47,63	4,78	5,97	7,72
552.A226 Standard request	226	56,97	50,83	50,80	4,78	5,97	7,72
552.A227 Standard request	227	60,15	54,00	53,98	4,78	5,97	7,72
552.A228 Standard request	228	63,32	57,18	57,15	4,78	5,97	7,72
552.A229 Standard request	229	66,50	60,35	60,33	4,78	5,97	7,72
552.A230 Standard request	230	69,67	63,53	63,50	4,78	5,97	7,72
552.A231 Standard request	231	72,85	66,70	66,68	4,78	5,97	7,72
552.A232 Standard request	232	76,02	69,88	69,85	4,78	5,97	7,72
552.A233 Standard request	233	79,20	73,05	73,03	4,78	5,97	7,72
552.A234 Standard request	234	82,37	76,23	76,20	4,78	5,97	7,72
552.A235 Standard request	235	85,55	79,40	79,38	4,78	5,97	7,72
552.A236 Standard request	236	88,72	82,58	82,55	4,78	5,97	7,72
552.A237 Standard request	237	91,90	85,75	85,73	4,78	5,97	7,72
552.A238 Standard request	238	95,07	88,93	88,93	4,78	5,97	7,72
552.A239 Standard request	239	98,25	92,10	92,10	4,78	5,97	7,72
552.A240 Standard request	240	101,42	95,28	95,28	4,78	5,97	7,72
552.A241 Standard request	241	104,60	98,45	98,45	4,78	5,97	7,72
552.A242 Standard request	242	107,77	101,63	101,63	4,78	5,97	7,72
552.A243 Standard request	243	110,95	104,80	104,80	4,78	5,97	7,72
552.A244 Standard request	244	114,12	107,98	107,98	4,78	5,97	7,72
552.A245 Standard request	245	117,30	111,15	111,15	4,78	5,97	7,72
552.A246 Standard request	246	120,47	114,33	114,33	4,78	5,97	7,72
552.A247 Standard request	247	123,65	117,50	117,50	4,78	5,97	7,72
552.A325 Standard request	325	47,42	37,97	37,97	7,14	8,48	10,77
552.A326 Standard request	326	50,60	41,15	41,15	7,14	8,48	10,77
552.A327 Standard request	327	53,80	44,35	44,35	7,14	8,48	10,77
552.A328 Standard request	328	56,97	47,52	47,52	7,14	8,48	10,77