Parker Prädifa Rod Seals A7

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The Parker Prädifa PDF  scraper rings profile A7 has the task of preventing the ingress of dust, dirt, grains of sand, and metal shavings in dynamic rod guides. This is achieved through their special shape. This largely prevents scoring, protects the guide parts, and extends the operating life of the seals. Profile A7 should always be used in conjunction with an elastomer wiper.

The Parker Praedifa PDF scraper ring profile A7 gives the cylinder a technically clean finish. No special screw rings and retaining plates are required for installation. It doesn’t require tight fits or metal inserts. This prevents the possible corrosion that can occur between the metal cage and the cylinder head when using a metal wiper. For the grooving, a fine fit is not necessary.

Scope of application:

PDF scraper ring profile A7 for axially moving bars on hydraulic tables
Working cylinders and rod guides.
Operating temperature: – 40 to + 100. C
Gliding speed: s 1 m / s

Installation instructions:

The PDF scraper ring profile A7 is supplied as a closed ring.
Avoid pressure against the back of the ring.
It can be snapped into closed grooves will.

Material:

The standard material is a plastic-based on polyamide (pA66).
In special operating conditions (Temperature, speed, etc.) please contact our Department of Application Technology, Material, and construction on your special application.

Ød D H Order code
44,5 56 1,9 A74055W5015
45 56 2 A74056W5015
56 67 2 A75068W5015
59,5 71 1,9 A75090W5015
63 74 2 A76033W5015
69,5 81 1,9 A76981W5015
70 82 2 A77082W5015
75 87 2 A77517W5015
78 89,5 1,9 A77815W5015
80 92 2 A78092W5015
87 98,5 1,9 A78799W5015
90 102 2 A79012W5015
97 108,5 1,9 A79708W5015
100 112 2 A7A012W5015
104 115,5 1,9 A7A215W5015
110 122 2 A78022W5015
118 129,5 1,9 A78829W5015
120 132 2 A7C032W5015
124 136 2 A7C036W5015
130 150 2,5 A7D050W5015
140 160 2,5 A7E060W5015
150 170 2,5 A7F070W5015
160 180 2,5 A7G080W5015
180 200 2,5 A7J020W5015
200 220 2,5 A7L020W5015

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