BECA 337 - 339

Hydraulic seals / Rod/Piston seals

BECA 337 - 339

Description

The BECA 337 profile is a single acting symmetrical seal composed of a profiled, filled PTFE U-ring type seal and a V-Shaped spring that is resistant to corrosion.

The BECA 339 profile is specially designed for applications where the seal is in contact with food products. It is characterised by a silicone overmoulding on the inside of the seal, which completely hides the V-Shaped spring, thus preventing impurities from accumulating in this hard-to-clean area.

Advantages

Low friction coefficient; no stick-slip effect
Excellent abrasion resistance
Good dimensional stability
Wide temperature range and excellent chemical resistance
Non-toxic material

Technical data

Temperature	-200°C/+260°C
Pressure	30 MPa
Speed	15 m/s
Medias	Practically all types of fluids, and chemical and gas products

Applications

Food & Beverage
Medical
Pharmaceutical
Static hydraulics

Materials

Profiled seal

Carbon-filled PTFE
GL Blue PTFE
PE-UHMW

V-Shaped spring

Stainless steel

Download

Product data - Hydraulic symmetrical rod piston seal - BECA 337 - 339 Product catalog - Hydraulic seals

Dimensions

Installation dimensions

Materials

Technical data

Dimensions

Installation drawing Logement Gorge Joint de tige piston - Housing Groove Gland Rod Piston seal BECA 337 - 339

Installation dimensions

Housing Groove Gland Rod/Piston Seal - BECA 337 - 339

Installation dimensions

Series	Cylinder sealing			Rod sealing			Groove width	Radial section
	Bore diameter ØD1 H9		Groove diameter Ød1 h9	Rod diameter Ød1 h9		Groove diameter ØD1 H9	L1 0/+0.20	S
	Standard series	Extended series	Groove diameter Ød1 h9	Standard series	Extended series	Groove diameter ØD1 H9	L1 0/+0.20	S
337.0*	6.0 - 13.9	6.0 - 40.0	D1 - 2.90	3.0 - 9.9	3.0 - 40.0	d1 + 2.90	2.40	1.45
337.1	14.0 - 24.9	10.0 - 200.0	D1 - 4.50	10.0 - 19.9	6.0 - 200.0	d1 + 4.50	3.60	2.25
337.2	25.0 - 45.9	16.0 - 400.0	D1 - 6.20	20.0 - 39.9	10.0 - 400.0	d1 + 6.20	4.80	3.10
337.3	46.0 - 124.9	28.0 - 700.0	D1 - 9.40	40.0 - 119.9	20.0 - 700.0	d1 + 9.40	7.10	4.70
337.4	125.0 - 999.9	45.0 - 999.9	D1 - 12.20	120.0 - 629.9	35.0 - 999.9	d1 + 12.20	9.50	6.10
337.5	1000.0 - 2500.0	100.0 - 2500.0	D1 - 19.00	630.0 - 999.9	80.0 - 999.9	d1 + 19.00	15.00	9.50

For special applications > 30 MPa, we recommend using H8/f8 (bore/piston) and H8/f8 (groove/rod) tolerances or selecting other more suitable materials. Please contact our experts.

*Only BECA 337.0 profiles are fitted with an O'Ring instead of a V-Shaped spring.

Materials

Profiled seal					V-Shaped spring			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	I	X10 Cr Ni 18-8	-200°C/+260°C	Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface



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


CG	C	PTFE + 23% Carbon + 2% Graphite	Black


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				Steel Chrome steel Cast iron
DV	V	PTFE + 25 % Glass	Blue
VM	M	PTFE + 15 % Glass + 5% MoS2	Grey
VM	M	PTFE + 15 % Glass + 5% MoS2	Grey
DX	X	GL Blue PTFE + Glass + Metal oxides	Turquoise blue	Compression resistant Wear resistant Excellent chemical stability Good thermal conductivity
DX	X	GL Blue PTFE + Glass + Metal oxides	Turquoise blue
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				Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface


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


K2	K	PTFE + 20% Ekonol	Light brown


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				Steel Chrome steel Cast iron
DB	B	PTFE + 60% Bronze	Dark brown
B4	B	PTFE + 40% Bronze	Dark brown
B4	B	PTFE + 40% Bronze	Dark brown
HG	HG	PE-UHMW	White or off-white	Excellent wear resistance on contact with water and air	I	X10 Cr Ni 18-8	-70°C/+80°C	Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface

Other grades of materials are available depending on your specificities.

Technical data

Housing Groove Gland Rod/Piston Seal - BECA 337 - 339

Extrusion gaps

Radial section S	Radial extrusion gap F/2
Radial section S	2 MPa	10 MPa	20 MPa	30 MPa
1.45	0.20	0.10	0.08	0.05
2.25	0.25	0.15	0.10	0.07
3.10	0.35	0.20	0.15	0.08
4.70	0.50	0.25	0.20	0.10
6.10	0.60	0.30	0.25	0.12
9.50	0.90	0.50	0.40	0.20

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

Radial section S	Radius R1	Radius R2	Chamfer C
1.45	0.30	0.40	3.00
2.25	0.30	0.40	3.00
3.10	0.30	0.60	3.00
4.70	0.30	0.80	3.00
6.10	0.30	0.80	3.50
9.50	0.30	0.80	6.50

147 dimensions found

337.0004 Standard request	4,00	6,90	2,10	2,40	0,40
337.0005 Standard request	5,00	7,90	2,10	2,40	0,40
337.0051 Standard request	5,10	8,00	2,10	2,40	0,40
337.0006 Standard request	6,00	8,90	2,10	2,40	0,40
337.0007 Standard request	7,00	9,90	2,10	2,40	0,40
337.0071 Standard request	7,10	10,00	2,10	2,40	0,40
337.0008 Standard request	8,00	10,90	2,10	2,40	0,40
337.0091 Standard request	9,10	12,00	2,10	2,40	0,40
337.1095 Standard request	9,50	14,00	3,30	3,60	0,60
337.1010 Standard request	10,00	14,50	3,30	3,60	0,60
337.1105 Standard request	10,50	15,00	3,30	3,60	0,60
337.1011 Standard request	11,00	15,50	3,30	3,60	0,60
337.1115 Standard request	11,50	16,00	3,30	3,60	0,60
337.1012 Standard request	12,00	16,50	3,30	3,60	0,60
337.1125 Standard request	12,50	17,00	3,30	3,60	0,60
337.1135 Standard request	13,50	18,00	3,30	3,60	0,60
337.1014 Standard request	14,00	18,50	3,30	3,60	0,60
337.1015 Standard request	15,00	19,50	3,30	3,60	0,60
337.1155 Standard request	15,50	20,00	3,30	3,60	0,60
337.1016 Standard request	16,00	20,50	3,30	3,60	0,60
337.1175 Standard request	17,50	22,00	3,30	3,60	0,60
337.1018 Standard request	18,00	22,50	3,30	3,60	0,60
337.2188 Standard request	18,80	25,00	4,40	4,80	0,70
337.2195 Standard request	19,50	24,00	3,30	3,60	0,60
337.2198 Standard request	19,80	26,00	4,40	4,80	0,70
337.2020 Standard request	20,00	26,20	4,40	4,80	0,70
337.2218 Standard request	21,80	28,00	4,40	4,80	0,70
337.2022 Standard request	22,00	28,20	4,40	4,80	0,70
337.2238 Standard request	23,80	30,00	4,40	4,80	0,70
337.2025 Standard request	25,00	31,20	4,40	4,80	0,70
337.2258 Standard request	25,80	32,00	4,40	4,80	0,70
337.2028 Standard request	28,00	34,20	4,40	4,80	0,70
337.2288 Standard request	28,80	35,00	4,40	4,80	0,70
337.2030 Standard request	30,00	36,20	4,40	4,80	0,70
337.2032 Standard request	32,00	38,20	4,40	4,80	0,70
337.2322 Standard request	32,20	38,40	4,40	4,80	0,70
337.2033 Standard request	33,00	39,20	4,40	4,80	0,70
337.2338 Standard request	33,80	40,00	4,40	4,80	0,70
337.2035 Standard request	35,00	41,20	4,40	4,80	0,70
337.2358 Standard request	35,80	42,00	4,40	4,80	0,70
337.2036 Standard request	36,00	42,20	4,40	4,80	0,70
337.3366 Standard request	36,60	46,00	6,50	7,10	0,80
337.2038 Standard request	38,00	44,20	4,40	4,80	0,70
337.3386 Standard request	38,60	48,00	6,50	7,10	0,80
337.2388 Standard request	38,80	45,00	4,40	4,80	0,70
337.3396 Standard request	39,60	49,00	6,50	7,10	0,80
337.3040 Standard request	40,00	49,40	6,50	7,10	0,80
337.3406 Standard request	40,60	50,00	6,50	7,10	0,80
337.3042 Standard request	42,00	51,40	6,50	7,10	0,80
337.3426 Standard request	42,60	52,00	6,50	7,10	0,80
337.3436 Standard request	43,60	53,00	6,50	7,10	0,80
337.3045 Standard request	45,00	54,40	6,50	7,10	0,80
337.3456 Standard request	45,60	55,00	6,50	7,10	0,80
337.3466 Standard request	46,60	56,00	6,50	7,10	0,80
337.3048 Standard request	48,00	57,40	6,50	7,10	0,80
337.3486 Standard request	48,60	58,00	6,50	7,10	0,80
337.3050 Standard request	50,00	59,40	6,50	7,10	0,80
337.3506 Standard request	50,60	60,00	6,50	7,10	0,80
337.3516 Standard request	51,60	61,00	6,50	7,10	0,80
337.3052 Standard request	52,00	61,40	6,50	7,10	0,80
337.3536 Standard request	53,60	63,00	6,50	7,10	0,80
337.3546 Standard request	54,60	64,00	6,50	7,10	0,80
337.3055 Standard request	55,00	64,40	6,50	7,10	0,80
337.3556 Standard request	55,60	65,00	6,50	7,10	0,80
337.3056 Standard request	56,00	65,40	6,50	7,10	0,80
337.3576 Standard request	57,60	67,00	6,50	7,10	0,80
337.3060 Standard request	60,00	69,40	6,50	7,10	0,80
337.3606 Standard request	60,60	70,00	6,50	7,10	0,80
337.3063 Standard request	63,00	72,40	6,50	7,10	0,80
337.3646 Standard request	64,60	74,00	6,50	7,10	0,80
337.3065 Standard request	65,00	74,40	6,50	7,10	0,80
337.3656 Standard request	65,60	75,00	6,50	7,10	0,80
337.3070 Standard request	70,00	79,40	6,50	7,10	0,80
337.3706 Standard request	70,60	80,00	6,50	7,10	0,80
337.3072 Standard request	72,00	81,40	6,50	7,10	0,80
337.3736 Standard request	73,60	83,00	6,50	7,10	0,80
337.3075 Standard request	75,00	84,40	6,50	7,10	0,80
337.3756 Standard request	75,60	85,00	6,50	7,10	0,80
337.3766 Standard request	76,60	86,00	6,50	7,10	0,80
337.3080 Standard request	80,00	89,40	6,50	7,10	0,80
337.3806 Standard request	80,60	90,00	6,50	7,10	0,80
337.3085 Standard request	85,00	94,40	6,50	7,10	0,80
337.3856 Standard request	85,60	95,00	6,50	7,10	0,80
337.3886 Standard request	88,60	98,00	6,50	7,10	0,80
337.3090 Standard request	90,00	99,40	6,50	7,10	0,80
337.3906 Standard request	90,60	100,00	6,50	7,10	0,80
337.3095 Standard request	95,00	104,40	6,50	7,10	0,80
337.3986 Standard request	98,60	108,00	6,50	7,10	0,80
337.3100 Standard request	100,00	109,40	6,50	7,10	0,80
337.1006 Standard request	100,60	110,00	6,50	7,10	0,80
337.3105 Standard request	105,00	114,40	6,50	7,10	0,80
337.1056 Standard request	105,60	115,00	6,50	7,10	0,80
337.3110 Standard request	110,00	119,40	6,50	7,10	0,80
337.1106 Standard request	110,60	120,00	6,50	7,10	0,80
337.1128 Standard request	112,80	125,00	8,80	9,50	0,90
337.3115 Standard request	115,00	124,40	6,50	7,10	0,80
337.3116 Standard request	116,00	125,40	6,50	7,10	0,80
337.1178 Standard request	117,80	130,00	8,80	9,50	0,90
337.4120 Standard request	120,00	132,20	8,80	9,50	0,90
337.1228 Standard request	122,80	135,00	8,80	9,50	0,90