BECA 501

Aerospace seals / Piston seals

BECA 501

Description

The BECA 501 profile is a single acting composite piston seal composed of a filled PTFE friction ring and a pre-tightened rubber O'Ring. It follows the bore diameters, in line with the standards MIL-G-5514F and AS4716.

Advantages

Optimal sealing in static and dynamic applications
Low friction coefficient; no stick-slip effect
Excellent abrasion and extrusion resistance
Wide temperature range and excellent chemical resistance, depending on the material selected for the O'Ring

Technical data

Temperature	-40°C/+200°C
Pressure	35 MPa
Speed	5 m/s
Medias	Hydraulic fluids with a mineral oil base Fire retardant hydraulic fluids Bio oils Phosphate esters Water

Applications

Actuators
Brakes systems
Flight controls
Engine systems
Landing gear

Materials

Friction ring

Bronze-filled PTFE
Carbon-filled PTFE
GL Blue PTFE

O'Ring

NBR 70 Shore A
FKM 70 Shore A

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Product data - Aerospace piston seal - BECA 501

Series	Bore diameter	Groove diameter	Groove width	O'Ring Series
AS4716 / MIL-G-5514
ØD1	Ød1	L1 min

Dimensions

Materials

Technical data

Dimensions

Installation drawing Logement Gorge Joint de piston aéronautique - Housing Groove Gland aerospace piston seal BECA 501

Materials

Friction ring					O'Ring			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
HG	HG	UHMW-PE	White or off-white	Excellent wear resistance on contact with water and air	K6	NBR 70 Shore A	-30°C/+80°C	Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface
PU	U	Polyurethane	Blue	Large mechanical resistance Good abrasion and wear resistance High elastic modulus Good flexibility Very good ozone and oxidation resistance	K6	NBR 70 Shore A	-30°C/+90°C
PUHT	U	High-temperature polyurethane	White or off-white		K6	NBR 70 Shore A	-30°C/+110°C

Other grades of materials are available depending on your specificities.

Technical data

Groove widths and extrusion gaps

Series	Width L1 min - max	Extrusion gaps F	O'Ring Ød2
010 - 012	2.06 - 2.19	0.10	1.78
013 - 028	2.06 - 2.19	0.13	1.78
110 - 129	3.20 - 3.33	0.13	2.62
130 - 140		0.15
141 - 149		0.18
210 - 222	4.22 - 4.35	0.13	3.53
223 - 227		0.15
228 - 243		0.18
244 - 247		0.20
325 - 329	6.27 - 6.40	0.15	5.33
330 - 345		0.18
346 - 352		0.20
428 - 445	8.13 - 8.26	0.23	6.99
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
350 - 446	0/+0.076	-0.076/0
447 - 460	0/+0.100	-0.076/0

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

Radius and chamfers

Series	Radius R1 min - max	Radius R2 min - max	Chamfer C
010 - 149	0.13 - 0.26	0.13 - 0.38	3.00
210 - 247	0.13 - 0.26	0.25 - 0.64	4.00
325 - 460	0.13 - 0.26	0.50 - 0.73	5.00

158 dimensions found

501.A328 Standard request	328	56,97	42,90	6,27	327
501.A329 Standard request	329	60,15	46,08	6,27	328
501.A330 Standard request	330	63,32	49,25	6,27	329
501.A331 Standard request	331	66,50	52,43	6,27	330
501.A332 Standard request	332	69,67	55,60	6,27	331
501.A333 Standard request	333	72,85	58,78	6,27	332
501.A334 Standard request	334	76,02	61,95	6,27	333
501.A335 Standard request	335	79,20	65,13	6,27	334
501.A336 Standard request	336	82,37	68,30	6,27	335
501.A337 Standard request	337	85,55	71,48	6,27	336
501.A338 Standard request	338	88,72	74,65	6,27	337
501.A339 Standard request	339	91,90	77,83	6,27	338
501.A340 Standard request	340	95,07	81,00	6,27	339
501.A341 Standard request	341	98,25	84,18	6,27	340
501.A342 Standard request	342	101,42	87,35	6,27	341
501.A343 Standard request	343	104,60	90,53	6,27	342
501.A344 Standard request	344	107,77	93,70	6,27	343
501.A345 Standard request	345	110,95	96,88	6,27	344
501.A346 Standard request	346	114,12	100,05	6,27	345
501.A347 Standard request	347	117,30	103,23	6,27	346
501.A348 Standard request	348	120,47	106,40	6,27	347
501.A349 Standard request	349	123,65	109,58	6,27	348
501.A425 Standard request	350	126,34	112,27	6,27	349
501.A426 Standard request	351	129,51	115,44	6,27	350
501.A427 Standard request	352	132,69	118,62	6,27	351
501.A428 Standard request	428	135,86	116,81	8,13	352
501.A429 Standard request	429	139,04	119,99	8,13	428
501.A430 Standard request	430	142,21	126,16	8,13	429
501.A431 Standard request	431	145,39	126,34	8,13	430
501.A432 Standard request	432	148,56	129,51	8,13	431
501.A433 Standard request	433	151,74	132,69	8,13	432
501.A434 Standard request	434	154,91	135,86	8,13	433
501.A435 Standard request	435	158,09	139,04	8,13	434
501.A436 Standard request	436	161,26	142,21	8,13	435
501.A437 Standard request	437	164,44	145,39	8,13	436
501.A438 Standard request	438	170,79	151,74	8,13	437
501.A439 Standard request	439	177,14	158,09	8,13	438
501.A440 Standard request	440	183,49	164,44	8,13	439
501.A441 Standard request	441	189,84	170,79	8,13	440
501.A442 Standard request	442	196,19	177,14	8,13	441
501.A443 Standard request	443	202,54	183,49	8,13	442
501.A444 Standard request	444	208,89	189,84	8,13	443
501.A445 Standard request	445	215,24	196,19	8,13	444
501.A446 Standard request	446	227,94	208,89	8,13	445
501.A447 Standard request	447	240,64	221,59	8,13	446
501.A448 Standard request	448	253,34	234,29	8,13	447
501.A449 Standard request	449	266,04	246,99	8,13	448
501.A450 Standard request	450	278,74	259,69	8,13	449
501.A451 Standard request	451	291,44	272,39	8,13	450
501.A452 Standard request	452	304,14	285,09	8,13	451
501.A453 Standard request	453	316,84	297,79	8,13	452
501.A454 Standard request	454	329,54	310,49	8,13	453
501.A455 Standard request	455	342,24	323,19	8,13	454
501.A456 Standard request	456	354,94	335,89	8,13	455
501.A457 Standard request	457	367,64	348,59	8,13	456
501.A458 Standard request	458	380,34	361,29	8,13	457
501.A459 Standard request	459	393,04	373,99	8,13	458
501.A460 Standard request	460	405,74	386,69	8,13	459