BECA 156M

Aerospace seals / Rod seals

BECA 156M

Description

The BECA 156M profile is a single acting composite rod seal composed of a filled PTFE friction ring and a pre-tightened rubber O'Ring. It meets the standards MIL-G-5514F and AS4716.

Advantages

Low friction coefficient
Suitable for a reduced size
Wide temperature range and excellent chemical resistance, depending on the materials selected
Housing in line with MIL-G-5514F and AS4716

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 rod seal - BECA 156M

Series	Rod diameter	Groove diameter	Groove width	O'Ring Series
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 tige aéronautique - Housing Groove Gland aerospace rod seal BECA 156M

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

Other grades of materials are available depending on your specificities.

Technical data

Housing Groove Aerospace Rod Seal - BECA 156M

Groove widths and extrusion gaps

Series	Groove width			Extrusion gaps F	O'Ring Ød2
Series	L1 min - max	L2 min - max	L3 min - max	Extrusion gaps F	O'Ring Ød2
110 - 125	3.58 - 3.83	4.65 - 4.90	6.22 - 6.47	0.13	2.62
126 - 131				0.15
132 - 149				0.18
210 - 222	4.78 - 5.03	5.97 - 6.22	7.72 - 7.97	0.13	3.53
223 - 225				0.15
226 - 245				0.18
246 - 247				0.20
325 - 327	7.14 - 7.39	8.48 - 8.73	10.77 - 11.02	0.15	5.33
328 - 349	7.14 - 7.39	8.48 - 8.73	10.77 - 11.02	0.18	5.33
425 - 449	9.53 - 9.78	12.07 - 12.32	14.71 - 14.96	0.23	6.99
450 - 460	9.53 - 9.78	12.07 - 12.32	14.71 - 14.96	0.25	6.99

Tolerances on the rod diameters and groove diameters

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

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
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

139 dimensions found

156.347 Standard request	347	107,87	117,32	117,32	7,14	8,48	10,77	245
156.348 Standard request	348	111,05	120,5	120,50	7,14	8,48	10,77	246
156.349 Standard request	349	114,22	123,67	123,67	7,14	8,48	10,77	247
156.425 Standard request	425	114,22	126,34	126,34	9,53	12,07	14,71	350
156.426 Standard request	426	117,40	129,51	129,51	9,53	12,07	14,71	351
156.427 Standard request	427	120,57	132,69	132,69	9,53	12,07	14,71	352
156.428 Standard request	428	123,75	135,86	135,86	9,53	12,07	14,71	353
156.429 Standard request	429	126,92	139,04	139,04	9,53	12,07	14,71	354
156.430 Standard request	430	130,10	142,21	142,21	9,53	12,07	14,71	355
156.431 Standard request	431	133,27	145,39	145,39	9,53	12,07	14,71	356
156.432 Standard request	432	135,45	148,56	148,56	9,53	12,07	14,71	357
156.433 Standard request	433	139,62	151,74	151,74	9,53	12,07	14,71	358
156.434 Standard request	434	142,80	154,91	154,91	9,53	12,07	14,71	359
156.435 Standard request	435	145,97	158,09	158,09	9,53	12,07	14,71	360
156.436 Standard request	436	149,15	161,26	161,26	9,53	12,07	14,71	361
156.437 Standard request	437	152,32	164,44	164,44	9,53	12,07	14,71	361
156.438 Standard request	438	158,67	170,79	170,79	9,53	12,07	14,71	362
156.439 Standard request	439	165,02	177,14	177,14	9,53	12,07	14,71	363
156.440 Standard request	440	171,37	183,49	183,49	9,53	12,07	14,71	364
156.441 Standard request	441	177,72	189,84	189,84	9,53	12,07	14,71	365
156.442 Standard request	442	184,07	196,19	196,19	9,53	12,07	14,71	366
156.443 Standard request	443	190,42	202,54	202,54	9,53	12,07	14,71	367
156.444 Standard request	444	196,77	208,89	208,89	9,53	12,07	14,71	368
156.445 Standard request	445	203,12	215,24	215,24	9,53	12,07	14,71	369
156.446 Standard request	446	215,82	227,94	227,94	9,53	12,07	14,71	371
156.447 Standard request	447	228,52	240,64	240,64	9,53	12,07	14,71	373
156.448 Standard request	448	241,22	253,34	253,34	9,53	12,07	14,71	375
156.449 Standard request	449	253,92	266,04	266,04	9,53	12,07	14,71	377
156.450 Standard request	450	266,62	278,74	278,74	9,53	12,07	14,71	378
156.451 Standard request	451	279,32	291,44	291,44	9,53	12,07	14,71	379
156.452 Standard request	452	292,02	304,14	304,14	9,53	12,07	14,71	380
156.453 Standard request	453	304,72	316,84	316,84	9,53	12,07	14,71	381
156.454 Standard request	454	317,42	329,54	329,54	9,53	12,07	14,71	381
156.455 Standard request	455	330,12	342,24	342,24	9,53	12,07	14,71	382
156.456 Standard request	456	342,82	354,94	354,94	9,53	12,07	14,71	382
156.457 Standard request	457	355,52	367,64	367,64	9,53	12,07	14,71	383
156.458 Standard request	458	368,22	380,34	380,34	9,53	12,07	14,71	383
156.459 Standard request	459	380,92	393,04	393,04	9,53	12,07	14,71	384
156.460 Standard request	460	393,62	405,74	405,74	9,53	12,07	14,71	384