B+S RU1 SEALING PARTS TS POLYPAC EUK

Description

Today U-Cups are used primarily as seals for piston rods in hydraulic cylinders. U-Cups in polyurethane are proven elements, due to their good mechanical properties, for standard cylinder construction, particularly for mobile hydraulics under rough operating conditions. The U-Cup RU1 is a single lip seal in a compact design.

Type RU1

The compact U-Cup type RU1 is designed for small grooves. It is thus particularly suitable for use in space-saving designs. The compact form provides a high sealing effect even with low system pressures. U-Cup has one sealing lip in the dynamic sealing zone. The compact form provides an improvement in the leakage behaviour at low system pressures.

Method of Operation

The sealing effect of the U-Cup comes from the intrinsic preload of the seal body and from the compression of the seal lips during installation. In operating condition, the radial mechanical contact forces are superimposed by the system pressure.

At low stroke speeds, U-Cups can tend to have a stick-slip effect due to an inadequate lubrication film formation in the seal clearance and to their material properties. This behaviour corresponds to the Stribeck curve described in the relevant literature.

Advantages

– Good sealing effect at high and low pressures
– Good abrasion resistance, wear-resistant
– Unaffected by sudden loads
– Suitable for small grooves
– Simple installation

Technical Data

Operating pressure: Max. 40 MPa
Speed: Up to 0.5 m/s
Temperature: Use in mineral oils: -30°C to + 80°C
Media: Mineral oil-based hydraulic fluids.

Important Note:

The above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value.

Material

The thermoplastic polyurethane material used for U-Cups has a high abrasion resistance, a low compression set and exhibits a high resistance to clearance extrusion.

WUAQ3 turquoise color
WU9L3 blue color
UAT60 red color

Seal clearance

Guide values for the radial clearance between rod and gland in relation to the operating pressure and rod diameter can be found in Table XXVII

Design and Installation Instructions

The different forms have different grooves, see Table XXIX. U-Cups are used together with single-acting scrapers.

 

B+S RU1 SEALING PARTS TS POLYPAC EUK

Note	Rod Diameter	Groove Diameter	Groove Width	Seal Width	Part No.	B+S Ref.	Sealing Parts Ref. No.	Polypac Ref. No.
	dN f8/h9	D1 H10	L +0.2	B		Material Code
						WUAQ3	WU9L3	UAT60
* *	10.0 12.0 12.0	18.0 18.0 20.0	6.3 5.0 6.3	5.5 4.5 5.8	RU1000100 RU1000120 RU1100120	D D D	– TS 12 18 4.5 TS 12 20 5.8	– – –
	14,0	22,0	6,3	5,5	RU1000140	D	–	–
	16,0	22,0	4,5	4,0	RU1000160	–	TS 16 22 4	–
*	16,0	24,0	7,0	6,0	RU1100160	D	TS 16 24 6	–
	18,0	25,0	5,7	5,0	RU1000180	–	TS 18 25 5	–
	18,0	26,0	7,0	6,0	RU1100180	D	TS 18 26 6	–
*	18,0	28,0	6,3	5,8	RU1200180	–	TS 18 28  5.8	–
*	18,0	28,0	8,0	7,0	RU1300180	–	TS 18 28 7	–
	20,0	25,0	3,5	3,0	RU1300200	–	TS 20 25 3	–
	20,0	25,0	4,5	3,7	RU1400200	–	TS 20 25 3.7	–
	20,0	26,0	6,0	5,2	RU1200200	D	TS 20 26 5.2	–
	20,0	27,0	6,5	5,7	RU1100200	D	TS 20 27  5.7	–
*	20,0	28,0	6,3	5,8	RU1500200	–	TS 20 28 5.8	EU 2028/K
*	20,0	28,0	7,0	6,0	RU1600200	D	–	–
*	20,0	28,0	8,0	7,0	RU1700200	–	TS 20 28 7	–
	20,0	30,0	8,0	7,2	RU1800200	–	TS 20 30 7.2	–
	20,0	30,0	9,0	8,0	RU1900200	–	TS 20 30  8	–
	20,0	30,0	11,0	10,0	RU1A00200	–	TS 20 30 10	–
	21,0	27,0	5,0	4,5	RU1000210	–	TS 21 27  4.5	–

	22,0	28,0	5,5	4,5	RU1100220	D	TS 22 28 4.5	–
	22,0	29,0	5,6	5,0	RU1200220	–	TS 22 29 5	–
	22,0	30,0	7,0	6,7	RU1300220	D	TS 22 30 6	EU 2230/K
	22,0	30,0	8,0	7,0	RU1400220	D	TS 22 30 7	–
*	22,0	32,0	8,0	7,0	RU1500220	–	TS 22 32 7	–
*	22,0	32,0	9,0	8,0	RU1000220	D	TS 22 32 8	–
	24,0	30,0	5,0	4,5	RU1000240	–	TS 24 30 4.5	–
*	24,0	34,0	6,5	5,7	RU1100240	–	TS 24 34 5.7	–
	25,0	32,0	5,0	4,0	RU1400250	D	TS 25 32 4	–
	25,0	32,0	6,3	5,7	RU1300250	D	–	–
	25,0	33,0	6,3	5,8	RU1500250	–	TS 25 33 5.8	–
	25,0	33,0	7,0	6,0	RU1200250	D	–	–
*	25,0	33,0	9,0	8,0	RU1000250	D	TS 25 33 8	–
*	25,0	35,0	6,0	5,0	RU1100250	D	TS 25 35 5	–
*	25,0	35,0	8,0	7,0	RU1600250	–	TS 25 35 7	–
*	25,0	35,0	9,0	8,0	RU1700250	–	TS  25 35 8	–
*	25,0	35,0	10,0	9,0	RU1800250	–	TS 25 35 9	–
*	25,0	35,0	11,0	10,0	RU1900250	–	TS 25 35 10	–
*	25,0	36,0	6,0	5,0	RU1A00250	–	TS 25 36 5	–
*	25,0	38,0	11,0	10,0	RU1B00250	–	TS 25 38 10	–
	28,0	36,0	6,3	5,8	RU1000280	–	TS 28 36 5.8	–
	28,0	36,0	7,0	6,0	RU1100280	D	–	–
	28,0	36,0	9,0	8,0	RU1200280	–	TS 28 36 8	–
*	28,0	38,0	8,0	7,0	RU1300280	–	TS 28 38 7	–
	30,0	38,0	6,3	5,8	RU1100300	–	TS 30 38 5.8	–
	30,0	38,0	7,0	6,0	RU1000300	D	–	–
	30,0	38,0	9,0	8,0	RU1200300	D	TS 30 38 8	–
	30,0	40,0	8,0	7,0	RU1300300	–	TS 30 40 7	–
*	30,0	40,0	11,0	10,0	RU1400300	–	TS 30 40 10	–
	32,0	40,0	6,3	5,8	RU1100320	D	TS 32 40 5.8	–
	32,0	40,0	7,0	6,0	RU1300320	D		–
	32,0	40,0	9,0	8,0	RU1000320	D	TS 32 40 8	–
	32,0	42,0	8,0	7,0	RU1400320	–	TS 32 42 7	–
	32,0	42,0	9,0	8,0	RU1200320	D	TS 32 42 8	–
	32,0	42,0	11,0	10,0	RU1500320	–	TS 32 42 10	–
	35,0	43,0	7,0	6,0	RU1000350	D	TS 35 43 6	–
	35,0	43,0	9,0	8,0	RU1200350	–	TS 35 43 8	–
	35,0	45,0	8,0	7,0	RU1100350	D	TS 35 45 7	–
*	35,0	45,0	11,0	10,0	RU1300350	–	TS 35 45 10	–
	36,0	44,0	6,4	5,8	RU1000360	–	TS 36 44 5.8	EU 3644/1/K
*	36,0	44,0	7,0	6,0	RU1100360	D	TS 36 44 6	–
	36,0	44,0	9,0	8,0	RU1200360	D	TS 36 44 8	EU 3644/K
	36,0	46,0	8,0	7,0	RU1300360	–	TS 36 46 7	–
	36,0	46,0	11,0	10,0	RU1400360	–	TS 36 46 10	–
	38,0	45,0	7,0	6,0	RU1000380	–	TS 38 45 6	–

	40.0 40.0 40.0	48.0 48.0 48.0	6.3 7.0 9.0	5.8 6.0 8.0	RU1100400 RU1200400 RU1000400	– D D	TS 40 48 5.8 – TS 40 48 8	– – EU 4048/K
	40.0 40.0 40.0	50.0 50.0 50.0	7.0 8.0 11.0	6.0 7.0 10.0	RU1300400 RU1400400 RU1500400	– – –	TS 40 50 6 TS 40 50 7 TS 40 50 10	– – –
*	40.0 42.0 42.0	55.0 50.0 50.0	11.0 7.0 9.0	10.0 6.0 8.0	RU1600400 RU1100420 RU1000420	– D D	– – –	EU 4055/K – –
	42.0 45.0 45.0	53.0 53.0 53.0	10.0 6.4 7.0	9.0 5.8 6.0	RU1300420 RU1000450 RU1100450	– – –	TS 42 53 9 TS 45 53 5.8 TS 45 53 6	– EU 4553/K –
	45.0 45.0 45.0	53.0 53.0 55.0	9.0 11.0 8.0	8.0 10.0 7.0	RU1200450 RU1300450 RU1400450	D – –	TS 45 53 8 TS  45 53 10 TS 45 55 7	– – –
*	46.0 46.0 46.0	54.0 56.0 58.0	9.0 11.0 13.0	8.0 10.0 12.0	RU1200460 RU1100460 RU1000460	– D D	TS 46  54   8 – –	– – –
	50.0 50.0 50.0	58.0 58.0 60.0	9.0 13.0 8.0	8.0 12.0 7.0	RU1100500 RU1000500 RU1300500	D D D	TS 50  58   8 – TS 50 60 7	EU 5058/K – –
	50.0 50.0 50.0	60.0 62.0 62.0	11.0 9.0 11.0	10.0 8.0 10.0	RU1400500 RU1500500 RU1600500	– – –	TS 50 60 10 TS 50  62 8 TS 50 62 10	– – –
*	50.0 55.0 55.0	65.0 63.0 65.0	11.0 9.0 8.0	10.0 8.0 7.2	RU1700500 RU1000550 RU1100550	– D –	TS 50 65 10 TS 55 63 8 TS 55 65 7.2	– – –
	55.0 55.0 56.0	65.0 65.0 66.0	11.0 13.0 7.5	10.0 12.0 6.5	RU1200550 RU1300550 RU1000560	D – –	TS 55 65 10 TS 55 65 12 TS 56 66 6.5	EU 5565/K – –
	56.0 60.0 60.0	66.0 68.0 68.0	11.0 9.0 14.0	10.0 8.0 13.0	RU1100560 RU1000600 RU1100600	– D –	TS 56 66 10 TS 60 68 8 TS 60 68 13	– EU 6068/1/K –
	60.0 60.0 60.0	70.0 70.0 70.0	8.0 8.5 11.0	7.2 7.5 10.0	RU1200600 RU1300600 RU1400600	– D –	TS 60 70 7.2 TS 60 70 10	– – –
	60.0 60.0 61.0	70.0 72.0 69.0	13.0 10.0 9.0	12.0 9.0 8.0	RU1500600 RU1600600 RU1000610	– – –	TS 60 70 12 TS 60 72 9 TS 61 69 8	– – –
	63.0 63.0 65.0	71.0 75.0 73.0	9.0 11.0 9.0	8.0 10.0 8.0	RU1000630 RU1100630 RU1000650	D – D	TS 63 71 8 TS 63 75 10	– – –
*	65.0 66.0 68.0	75.0 80.0 76.0	13.0 11.0 9.0	12.0 10.0 8.0	RU1100650 RU1000660 RU1000680	D – –	TS 65 75 12 TS 66 80 10 TS 68 76 8	– – –

	70.0 70.0 70.0	78.0 80.0 80.0	9.0 7.5 8.0	8.0 6.5 7.0	RU1100700 RU1200700 RU1300700	D – –	– TS 70 80 6.5 TS 70 80 7	– – –
	70.0 70.0 70.0	80.0 80.0 82.0	11.0 13.0 10.0	10.0 12.0 9.0	RU1400700 RU1500700 RU1600700	– – –	TS 70 80 10 TS 70 80 12 TS 70 82 9	– EU 7080/K –
	70.0 70.0 72.0	82.0 85.0 78.0	11.0 11.0 7.0	10.0 10.0 6.0	RU1000700 RU1700700 RU1000720	D D –	– – TS 72 78 6	– – –
	75.0 75.0 75.0	83.0 85.0 85.0	9.0 8.0 10.0	8.0 7.2 9.0	RU1000750 RU1100750 RU1200750	D – –	– TS 75 85 7.2 –	– – EU 7585/K
	75.0 76.0 78.0	85.0 84.0 86.0	13.0 9.0 14.0	12.0 8.0 13.0	RU1300750 RU1000760 RU1000780	– – –	TS 75 85 12 TS 76 84 8 TS 78 86 13	– – –
	78.0 80.0 80.0	93.0 88.0 90.0	11.5 9.0 8.0	10.5 8.0 7.2	RU1100780 RU1000800 RU1100800	– D –	TS 78 93 10.5 – TS 80 90 7.2	– – –
	80.0 80.0 80.0	90.0 90.0 90.0	11.0 13.0 15.0	10.0 12.0 14.0	RU1200800 RU1300800 RU1400800	D – –	– TS 80 90 12 TS 80 90 14	– EU 8090/K –
	85.0 85.0 86.0	95.0 97.0 92.0	8.0 9.5 7.0	7.0 8.5 6.0	RU1000850 RU1100850 RU1000860	– – –	TS 85 95 7 TS 85 97 8.5 TS 86 92 6	– – –
	88.0 90.0 90.0	96.0 96.0 98.0	9.0 5.5 9.0	8.0 4.8 8.0	RU1000880 RU1100900 RU1200900	– – D	TS 88 96 8 TS 90 96 4.8 –	– – –
	90.0 90.0 91.0	100.0 100.0 99.0	7.5 13.0 9.0	6.5 12.0 8.0	RU1300900 RU1000900 RU1000910	– D –	TS 90 100 6.5 – TS 91 99 8	– EU 90100/K –
	95.0 95.0 97.0	105.0 112.0 105.0	13.0 12.5 14.0	12.0 11.5 13.0	RU1000950 RU1100950 RU1000970	D – –	– TS 95 112 11.5 TS 97 105 13	– – –
	107.0 115.0 118.0	115.0 125.0 126.0	9.0 13.0 14.0	8.0 12.0 13.0	RU1001070 RU1001150 RU1001180	– D –	TS 107 115 8 – TS 118 126 13	– – –
	120.0 126.0 140.0	135.0 134.0 150.0	16.0 9.0 13.0	15.0 8.0 12.0	RU1001200 RU1001260 RU1001400	– – D	TS 120 135 15 TS 126 134 8 –	– – –
	143.0 143.0 147.0	151.0 153.0 155.0	14.0 9.0 11.0	13.0 8.0 10.0	RU1001430 RU1101430 RU1001470	– – –	TS 143 151 13 TS 145 153 8 TS 147 155 10	– – –
	170.0 170.0	180.0 180.0	11.0 13.0	10.0 12.0	RU1101700 RU1001700	– D	TS 170 180 10 –	– –