Type 2921

6 | 15

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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

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Nr.

Element

Werkstoff

1

Cover

Polyamide (PA)

2

Screw

Stainless steel 1.4301

3

Locking device

Stainless steel 1.4305

4

Handwheel

Polyphenylene sulphide (PPS)

5

Visual position

indicator with scale

Polyamide (PA)

6

Spindle seal

PTFE V-rings (filled), with spring

compensation

7

Stem

Stainless steel 1.4401 or 1.4404

8

Spindle guide

Stainless steel 1.4404 (316L),

PTFE filled

9

Housing seal

Graphite

10

Swivel plate

Stainless steel 1.4401 (316)/1.4404

(316L)

11

Seat seal

PTFE or PEEK

12

Valve seat with O-ring Stainless steel 1.4571, EPDM

13

Valve body

Stainless steel 316L/CF3M