Type 8840

7 | 20

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3.

Materials

3.1. Bürkert resistApp

Bürkert resistApp – Chemical resistance chart

You want to ensure the reliability and durability of the materials in your individual application

case? Verify your combination of media and materials on our website or in our resistApp.

Start chemical resistance check

3.2. Material specifications

Actuator size 32 (B)

1

3

4

5

6

7

8

9

10

11

12

2

No.

Element

Material

1

Optical position indicator/Pilot air

ports

Stainless steel 1.4104

Thread M5

2

Actuator cover

Stainless steel 1.4404

3

Spring

1.4310

4

Piston seal

FPM

5

Pipe

Stainless steel 1.4404

6

Spindle seal

PTFE V-Rings (filled) with spring compensation

7

Spindle

Stainless steel 1.4404

8

Wiper

PTFE (filled)

9

Body seal

Graphite

10

Seal holder

Stainless steel 1.4404

11

Seat seal

PTFE

12

Dome nut

Stainless steel 1.4404