Parker Prädifa Piston Sealing Set N0

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The Parker Prädifa cylinder sealing set profile NO is manufactured in two parts and consists of a fabric reinforced symmetrical lip ring and a back-up ring made of fabric reinforced hard rubber. The lip ring has integral support thus obviating the necessity for separate header rings as found in normal seal ring arrangements. The header ring prevents extrusion damage to the lip ring occurring in the clearance between the piston and the cylinder wall.

The sealing set offers the following advantages in heavy hydraulic equipment:

  • High resistance to extrusion through a massive fabric reinforced header ring.
  • Due to the favourable profile design, there is no dynamic pressure build-up between the sealing elements in double-acting cylinders.
  • Through the choice of suitable materials, the seal is adapted for various working media.
  • Excellent sealing function at high surface speeds or under high pressures.
  • Long working life keeps maintenance costs down.

 

Field of application:

Working pressure:                  ≤ 500 bar

Working temperature:         — 40 to + 100 °C

Surface speed:                         ≤ 1 m/s

Preferably used for double-acting pistons in hydraulic cylinders.

Installation:

Groove dimensions agree with those for the Parker Praedifa profile NG series. It is to note that the sealing set must not be drawn over sharp edges or threads during assembly. This avoids damaging the lips. The value for, »e« are maximum values for completely worn out wear rings (see chapter A “Gap sizes”).

Compounds:

Sealing ring:  NBR-based hard fabric reinforced rubber (05015/Q5016).

Back-up ring: NBR-based hard fabric reinforced rubber (05021/05022).

For special requirements (pressure, temperature, speed etc.) please contact our Consultancy Service, so that suitable materials and/or designs can be recommended.

D d H Item number 
32 20 7,5 N0 0032 00361
32 22 6,5 N0 0033 00361
36 24 7,5 N0 0036 00361
40 25 9,5 N0 0040 00361
40 28 8 N0 0043 00361
45 30 9,5 N0 0045 00361
50 32 12 N0 0046 00361
50 35 9,5 N0 0050 00361
50 36 9 N0 0052 00361
55 40 9,5 N0 0055 00361
60 45 9,5 N0 0060 00361
63 45 9,7 N0 0062 00361
63 48 9,5 N0 0063 00361
70 50 12,5 N0 0070 00361
75 55 12,5 N0 0075 00361
80 60 12,5 N0 0080 00361
80 63 13,2 N0 0083 00361
90 70 12,5 N0 0090 00361
95 75 12,5 N0 0095 00361
100 80 12,5 N0 0100 00361
105 85 12,5 N0 0107 00361
110 90 12,5 N0 0110 00361
115 90 15,5 N0 0114 00361
115 95 12,5 N0 0115 00361
120 1 00 12,5 N0 0120 00361
125 1 00 15,5 N0 0125 00361
125 1 05 13 N0 0132 00361
130 1 05 17 N0 0135 00361
140 1 10 20 N0 0136 00361
140 1 15 15,5 N0 0140 00361
140 1 20 15 N0 0145 00361
140 120 15,5 N0 0146 00361
150 120 19 N0 0150 00361
160 130 19 N0 0160 00361
160 130 21,5 N0 0162 00361
160 135 16 N0 0164 00361
160 135 19 N0 0165 00361
170 140 20 N0 0172 00361
180 150 19 N0 0180 00361
190 160 20 N0 0190 00361
200 170 19 N0 0200 00361
220 190 19 N0 0220 00361
225 195 19 N0 0225 00361
240 210 19 N0 0240 00361
250 220 19 N0 0250 00361
260 230 19 N0 0260 00361
280 250 19 N0 0280 00361
300 270 19 N0 0300 00361

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Parker

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