Parker Prädifa Piston Seals ZW

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The Parker Prädifa ZW  double-acting piston sealing set consists of an elastomer sealing component, two anti-extrusion, and two angular guide rings. By combining the sealing and guiding functions, it offers a cost-effective all-in-one solution for medium-duty standard cylinders.

  • Good wear resistance.
  • Assembly on the one-part piston is possible.
  • Installation in closed and undercut.

Range of application

Sealing set for double-acting pistons in presses, drive cylinders, back-up, and operating cylinders for industrial and mobile hydraulics.

Operating pressure                                          ≤ 400 bar

Operating temperature                                  -35 °C to +100 °C

in HFA, HFB and HFC fluids                               +60 °C

Sliding speed                                                      ≤ 0.5 m/s

Compounds

Rubber component of the Parker Praedifa Piston Seals ZW: Highly wear-resistant NBR-compound NB078 with a hardness of 80 Shore A.

Anti-extrusion rings High-strength, wear-optimized polyester elastomer (W5035). Angular guide rings Thermoplast for high-pressure resistance even with increased temperatures (W5301).

Installation

Sharp edges and burrs in the assembly area of the seal must be removed. Assembly is performed in the following sequence: „rubber seal, anti-extrusion rings, angular guide rings“. Ensure that the contact points (gaps) of the angular guide and anti-extrusion rings are arranged in staggering positions.

D d L H d1 d2 a Order code
30 21 13.5 17.7 27 29 2.1 ZW003000260
32 22 15.5 20.7 28 31 2.6 ZW003200260
40 24 18.4 31.1 35.4 38.5 6.35 ZW004000260
40 26 15.5 20.7 36 39 2.6 ZW104000260
40 30 16.4 29.1 35.4 38.5 6.35 ZW204000260
50 34 18.4 31.1 45.4 48.5 6.35 ZW005000260
50 34 20.5 26.7 46 49 3.1 ZW105000260
50 38 20.5 28.9 46 48.5 4.2 ZW205000260
55 39 18.4 31.1 50.36 53.5 6.35 ZW005500260
60 44 18.4 31.1 55.4 58.5 6.35 ZW006000260
60 44 20.5 26.7 56 59 3.1 ZW106000260
60 48 20.5 28.9 56 58.5 4.2 ZW206000260
63 47 18.4 31.1 58.4 61.5 6.35 ZW006300260
63 47 19.4 32.1 58.4 61.5 6.35 ZW106300260
63 47 20.5 26.7 59 62 3.1 ZW206300260
63 51 20.5 28.9 59 61.5 4.2 ZW306300260
65 49 20.5 26.7 61 64 3.1 ZW006500260
65 50 18.4 31.1 60.4 63.5 6.35 ZW106500260
70 50 22.4 35.1 64.2 68.3 6.35 ZW007000260
70 54 20.5 26.7 66 69 3.1 ZW107000260
70 58 20.5 28.9 66 68.5 4.2 ZW207000260
75 55 22.4 35.1 69.2 73.3 6.35 ZW007500260
80 60 22.4 35.1 74.15 78.3 6.35 ZW008000260
80 62 22.5 29.7 76 79 3.6 ZW108000260
80 66 22.5 32.9 76 78.5 5.2 ZW208000260
85 65 22.4 31.5 79.3 83.3 6.35 ZW008500260
90 70 22.4 35.1 84.15 88.3 6.35 ZW009000260
90 72 22.5 29.7 86 89 3.6 ZW109000260
100 75 22.4 35.1 93.15 98 6.35 ZW010000260
100 82 22.5 29.7 96 99 3.6 ZW110000260
100 86 22.5 32.9 96 98.5 5.2 ZW210000260
105 80 22.4 35.4 98.1 103 6.5 ZW010500260
110 85 22.4 35.1 103.1 108 6.35 ZW011000260
110 92 22.5 29.7 106 109 3.6 ZW111000260

 

D d L H d1 d2 a Order code
110 96 22.5 32.9 106 109.4 5.2 ZW211000260
115 90 22.4 35.1 108.1 113 6.35 ZW011500260
115 97 22.5 29.7 111 114 3.6 ZW111500260
120 95 22.4 35.1 113.1 118 6.35 ZW012000260
125 100 25.4 38.1 118.1 123 6.35 ZW012500260
125 108 26.5 40.9 121 124.4 7.2 ZW212500260
140 115 25.4 38.1 133 138 6.35 ZW114000260
140 115 25.4 44.4 132.6 137.5 9.5 ZW014000260
140 118 26.5 36.7 136 139 5.1 ZW214000260
150 125 25.4 38.1 143 148 6.35 ZW115000260
150 125 25.4 44.4 142.6 147.5 9.5 ZW015000260
160 130 25.4 38.1 152.7 158 6.35 ZW316000260
160 135 25.4 44.4 152.6 157.5 9.5 ZW016000260
170 145 25.4 50.8 161.7 167.1 12.7 ZW017000260
180 150 35.4 48.1 172.95 177.87 6.35 ZW018000260
180 155 25.4 50.8 171.7 177.1 12.7 ZW118000260
200 175 25.4 50.8 191.6 197 12.7 ZW020000260
220 190 35.4 48.1 212.7 217.9 6.35 ZW022000260
250 220 35.4 48.1 242.9 247.85 6.35 ZW025000260
250 225 25.4 50.8 241.6 247 12.7 ZW125000260

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