Parker Prädifa Rod Seals BS

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The Parker Prädifa BS Ultrathan®  rod seal is a U-ring with an interference fit on the outer diameter and a secondary sealing lip. It is extremely wear-resistant, ensures reliable load holding performance, and is suitable for high-pressure hydraulic applications. The additional lip results in a larger deposit of lubrication film underneath the seal. This largely prevents dry running and higher wear and achieves longer service life. Due to its radial preloading, the secondary sealing lip reliably wipes off the liquid film even in low-pressure conditions or non-pressurized movement of the rod. For telescopic cylinders, we recommend the version with a 4-mm profile width.

  • Excellent sealing performance due to the elongated contact area and multiple sealing lips.
  • Exceptionally high static and dynamic sealing performance.
  • Enhanced sealing performance in non-pressurized
  • Penetration of air into the system is largely
  • Robust seal profile for harshest operating conditions.
  • Extreme wear
  • Easier
  • Insensitive to pressure
  • Improved lubrication due to pressure medium deposit in the dynamic contact
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound
  • Suitable compounds are available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing
  • Dimensions according to ISO
  • Short radial assembly
  • Installation in closed and undercut
  • Additional sizes of machined products available on short

Range of application

Mainly for sealing piston rods and plungers in heavy-duty applications in mobile and stationary hydraulics. The range of dimensions is primarily oriented to the requirements of ISO 5597 and ISO 3320 for housings and diameters.

Operating pressure                                          ≤ 400 bar

Operating temperature                                    -35 °C to +110 °C

Sliding speed                                                    ≤ 0.5 m/s

Media                                                                  Hydraulic oils based on mineral oil

Compounds

The compound Ultrathan® P5008 is a Parker Praedifa material based on polyurethane with a hardness of approx. 93 Shore A. Its main advantages in comparison with other polyurethane materials currently available on the market are the increased heat resistance and the lower compression set.

For media containing water, we recommend our hydrolysis-resistant polyurethane compound P5001.

Installation

The seals should have an axial clearance (see columns H and L). To avoid damage at the sealing lips, the seals should not be pulled over sharp edges during installation. Normally these seals may be snapped into closed grooves. Where access is restricted special assembly tools may be required. Proposals for the design of such tools will be provided on request. For gap sizes see chapter “Maximum Gap Allowance”.

d D H L Order code d D H L Order code
8 16 5.7 6.3 BS0816P5008 40 55 11.4 12.5 BS4007P5008
9 16 5.7 6.3 BS0916P5008 45 53 5.6 6.3 BS4553P5008
10 16 4.5 5.3 BS1016P5008 45 55 7.3 8 BS4555P5008
10 17 5.7 6.3 BS1017P5008 45 55 10 11 BS4556P5008
10 18 5.7 6.3 BS1018P5008 45 57.7 9.6 10.5 BS4557P5008
12.7 19.05 4.5 5.3 BS1270P5008 45 60 10.5 11.5 BS4562P5008
14 20 5.7 6.3 BS1420P5008 45 60 11.4 12.5 BS4561P5008
14 22 5.7 6.3 BS1422P5008 46 56 10 11 BS4605P5008
16 24 5.8 6.3 BS1624P5008 48 56 11.5 12.5 BS4856P5008
16 26 7.3 8 BS1626P5008 50 60 7.3 8 BS5004P5008
18 28 7.3 8 BS1827P5008 50 60 10 11 BS5006P5008
20 30 7.3 8 BS2030P5008 50 62.7 9.6 10.5 BS5062P5008
22 32 7.3 8 BS2232P5008 50 65 10 11 BS5064P5008
25 33 6.5 7.3 BS2533P5008 50 65 11.4 12.5 BS5065P5008
25 35 7.3 8 BS2535P5008 50.8 63.5 9.5 10.3 BS5085P5008
26 36 10 11 BS2605P5008 52 62 10 11 BS5203P5008
28 36 7 7.5 BS2836P5008 55 65 10 11 BS5564P5008
28 38 7.3 8 BS2838P5008 55 65 11 12 BS5565P5008
30 40 10 11 BS3005P5008 55 67 10 11 BS5567P5008
30 45 10 11 BS3030P5008 56 71 11.4 12.5 BS5609P5008
32 42 7.3 8 BS3242P5008 58 66 11.5 12.5 BS5866P5008
32 42 10 11 BS3243P5008 60 68 13 14 BS6068P5008
32 45 10 11 BS3245P5008 60 70 7.5 8.5 BS6069P5008
35 45 10 11 BS3545P5008 60 70 10 11 BS6070P5008
35 50 10 11 BS3550P5008 60 75 10 11 BS6074P5008
36 46 7.3 8 BS3646P5008 63 71 8 9 BS6371P5008
36 48 10 11 BS3649P5008 63 78 10 11 BS6377P5008
36 51 10 11 BS3651P5008 63 78 11.4 12.5 BS6378P5008
37 47 10 11 BS3747P5008 65 73 11.5 12.5 BS6573P5008
40 48 11.5 12.5 BS4004P5008 65 75 12 13 BS6075P5008
40 49.52 9.6 10.5 BS4049P5008 65 85 11.4 12.5 BS6578P5008
40 50 10 11 BS4005P5008 68 78 12 13 BS6805P5008
40 52 7.4 8 BS5608P5008 70 80 12 13 BS7080P5008
40 52 8 9 BS4008P5008 70 85 10 11 BS7084P5008

 

d D H L Order code d D H L Order code
70 85 11.4 12.5 BS7085P5008 130 145 12 13 BSD045P5008
74 82 11.5 12.5 BS7482P5008 140 160 14.5 16 BSE060P5008
75 85 11.5 12.5 BS7585P5008 143 151 13 14 BSE305P5008
75 88 10 11 BS7588P5008 145 153 11.5 12.5 BSE050P5008
75 90 10 11 BS7590P5008 150 170 15 16 BSF070P5008
77 87 11.5 12.5 BS7787P5008 152 160 9.1 10 BSF252P5008
78 86 11.5 12.5 BS7804P5008 152 164 9.1 10 BSF264P5008
80 88 11.5 12.5 BS8088P5008 160 185 18.2 20 BSG085P5008
80 90 12 13 BS8090P5008 167 175 11.5 12.5 BSG704P5008
80 95 11.4 12.5 BS8095P5008 167 176 11.5 12.5 BSG705P5008
80 100 12 13 BS8099P5008 170 200 18 19 BSH020P5008
81 89 11.5 12.5 BS8150P5008 171 179 13 14 BSH105P5008
82.55 95.25 9.53 10.3 BS8255P5008 176 186 12 13 BSH160P5008
85 93 11.5 12.5 BS8593P5008 177.7 195 9.73 11.3 BSH169P5008
85 100 12 13 BS8510P5008 180 188 9.1 10 BSJ080P5008
90 98 11.5 12.5 BS9098P5008 180 188 11.5 12.5 BSJ088P5008
90 105 11.4 12.5 BS9005P5008 180 192 9.1 10 BSJ092P5008
92 107 11.4 12.5 BS9203P5008 193 201 11.5 12.5 BSK003P5008
95 115 12 13 BS9515P5008 200 211 12 13 BSL005P5008
97 105 13 14 BS9705P5008 200 225 18.2 20 BSL025P5008
100 108 12 13 BSA008P5008 209.55 226.77 9.73 11.3 BSL008P5008
100 120 12 13 BSA019P5008 212 220 9.1 10 BSL012P5008
100 120 14.5 16 BSA020P5008 212 224 9.1 10 BSL024P5008
105 113 11.5 12.5 BSA513P5008 220 228 11.5 12.5 BSM028P5008
105 117 9.1 10 BSA517P5008 220 250 22.7 25 BSM050P5008
107 115 11.5 12.5 BSA715P5008 223 231 11.5 12.5 BSM060P5008
110 125 14.5 16 BSB025P5008 228.5 246 9 10 BSM085P5008
110 130 14.5 16 BSB030P5008 230 260 22.7 25 BSM110P5008
118 126 13 14 BSB805P5008 250 280 22.7 25 BSN580P5008
120 128 11.5 12.5 BSC028P5008 266.7 284 9.73 11.3 BSO005P5008
120 130 14 15 BSC030P5008 280 310 18 19 BSP008P5008
125 133 11.5 12.5 BSC233P5008
128 136 9.1 10 BSC836P5008
128 140 9.1 10 BSC840P5008

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