B+S RU6

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B+S RU6

Description

Additional to the machined seals StepsealR 2K and Rimseal for housings due to ISO 7425/2 (rubber energised plastic seals) the U-Cup type RU6 has been developped as an injection molded seal of polyurethane material to fit in the same ISO housings. The integrated NBR O-Ring (only available for series RU62 – RU64) improves the performance at low pressure and low temperature applications. Polyurethan (ZurconR Z04) is a proved material for U-cups due to their good mechanical properties.

Description

Additional to the machined seals Stepseal 2K and Rimseal for housings due to ISO 7425/2 (rubber energised plastic seals) the U-Cup type RU6 has been developped as an injection molded seal of polyurethane material to fit in the same ISO housings. The integrated NBR O-Ring (only available for series RU62 – RU64) improves the performance at low pressure and low temperature applications. Polyurethan (Zurcon Z04) is a proved material for U-cups due to their good mechanical properties.

Type RU6

The U-Cup type RU6 can be installed as a single seal for low to medium duty applications; for sealing systems, the U-Cup RU6 shall be installed mainly as a secondary seal together with the Turcon Stepseal 2K as primary seals.

B+S RU6 figuur 52

 

Method of Operation

The sealing effect of the U-Cup RU6 comes from the intrinsive preload of the seal body and from the compression of the seal lip and the O-Ring during installation. In operation conditions, the radial contact forces are superimposed by the system pressure.

Due to the special design and the integrated O-Ring the RU6 U-Cups have an excellent sealing behavior with and without pressure activation. The short sealing lip gives better friction values compared to common U-Cups.

Advantages

– Very good low pressure sealability
– Simple installation
– Lower friction compared with common U-Cups
– Installation in ISO 7475/2 grooves
– Very low compression set due to O-Ring

Application Examples

  • General hydraulic cylinders
  • Injection molding machines
  • Lift trucks
  • Agricultural machines

Technical Data

Operating pressure: Max. 25 MPa (as single element)
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.

B+S RU6 Table

Material

The thermoplastic polyurethane material ZurconR Z04 has a high abrasion resistance, a low compression set and exhibits a high resistance to clearance extrusion.

The integrated O-Ring is an NBR with 70 shore A and a very low compression set.

U-Cup: polyurethane 94 shore A
material code Z04
O-Ring: NBR 70 shore A
material code N
Set: Z04 N

Design and Installation Instructions

The different forms have different grooves, see Table.

B+S RU6 Table 2

B+S RU6 figuur 53

 

Rod Diameter
Groove Diameter Groove Width Radius Part No. O-Ring Size
dN f8/h9 D1 H10 L1 +0.2 r1
12,0 19,5 3,2 0,5 RU6100120
14,0 21,5 3,2 0,5 RU6100140
16,0 23,5 3,2 0,5 RU6100160
18,0 25,5 3,2 0,5 RU6100180
20,0 27,5 3,2 0,5 RU6100200
20,0 31,0 4,2 0,5 RU6200200 23.47 x 2.62
22,0 29,5 3,2 0,5 RU6100220
22,0 33,0 4,2 0,5 RU6200220 25.07 x 2.62
25,0 32,5 3,2 0,5 RU6100250
25,0 36,0 4,2 0,5 RU6200250 28.24 x 2.62
28,0 39,0 4,2 0,5 RU6200280 31.42 x 2.62
30,0 41,0 4,2 0,5 RU6200300 34.59 x 2.62
32,0 43,0 4,2 0,5 RU6200320 36.17 x 2.62
36,0 47,0 4,2 0,5 RU6200360 39.34 x 2.62
40,0 51,0 4,2 0,5 RU6200400 44.12 x 2.62
40,0 55,5 6,3 0,9 RU6300400 44.04 x 3.53
45,0 56,0 4,2 0,5 RU6200450 48.90 x 2.62
45,0 60,5 6,3 0,9 RU6300450 50.39 x 3.53
50,0 61,0 4,2 0,5 RU6200500 53.64 x 2.62
50,0 65,5 6,3 0,9 RU6300500 53.57 x 3.53
55,0 66,0 4,2 0,5 RU6200550 58.42 x 2.62
56,0 67,0 4,2 0,5 RU6200560 59.99 x 2.62
56,0 71,5 6,3 0,9 RU6300560 59.92 x 3.53
63,0 74,0 4,2 0,5 RU6200630 66.34 x 2.62
63,0 78,5 6,3 0,9 RU6300630 66.27 x 3.53
70,0 85,5 6,3 0,9 RU6300700 75.79 x 3.53
75,0 86,0 4,2 0,5 RU6200750 82.22 x 2.62
75,0 90,5 6,3 0,9 RU6300750 82.14 x 3.53
80,0 95,5 6,3 0,9 RU6300800 85.32 x 3.53
90,0 105,5 6,3 0,9 RU6300900 94.84 x 3.53
95,0 110,5 6,3 0,9 RU6300950 101.19 x 3.53
100,0 115,5 6,3 0,9 RU6301000 104.37 x 3.53
110,0 125,5 6,3 0,9 RU6301100 113.89 x 3.53
125,0 140,5 6,3 0,9 RU6301250 129.77 x 3.53
130,0 145,5 6,3 0,9 RU6301300 136.12 x 3.53
140,0 155,5 6,3 0,9 RU6301400 145.64 x 3.53
145,0 160,5 6,3 0,9 RU6301450 151.99 x 3.53
150,0 165,5 6,3 0,9 RU6301500 158.34 x 3.53
160,0 175,5 6,3 0,9 RU6301600 164.69 x 3.53
160,0 181,0 8,1 0,9 RU6401600 164.47 x 5.33
180,0 195,5 6,3 0,9 RU6301800 183.74 x 3.53
180,0 201,0 8,1 0,9 RU6401800 189.87 x 5.33
190,0 205,5 6,3 0,9 RU6301900 196.44 x 3.53
200,0 221,0 8,1 0,9 RU6402000 208.92 x 5.33
220,0 241,0 8,1 0,9 RU6102200 227.97 x 5.33
250,0 271,0 8,1 0,9 RU6402500 253.37 x 5.33
260,0 281,0 8,1 0,9 RU6402600 266.07 x 5.33
350,0 371,0 8,1 0,9 RU6403500 354.97 x 5.33

 

 

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