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Burkert Type 2658 User Manual

Page 13

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13

TechnicalData

name and material of the individual parts

position

Components

Material

1

Insert

PVC-U

2

Handle

PVC-U

3

Shaft O-ring

EPDM-FKM

4

Shaft

PVC-U/PP/PVC-C/PVDF

5

Ball seat

PTFE

6

Ball

PVC-U/PP/PVC-C/PVDF

7

Body

PVC-U/PP/PVC-C/PVDF

8

Support O-ring for ball seat EPDM-FKM

9

Radial seal O-ring

EPDM-FKM

10

Socket seal O-ring

EPDM-FKM

11

Support for ball seat

PVC-U/PP/PVC-C/PVDF

12

End connector

PVC-U/PP/PVC-C/PVDF

13

Union nut

PVC-U/PP/PVC-C/PVDF

16

Spring for lock (optional)

Stainless steel

17

Safety handle block for lock
(optional)

PP-GR

25

Position indicator

POM

26

Dual Block Locking device

POM

6.2.2. pressure-temperature graphs

The fluidic data is dependent on the material properties of the plastic
ball valve.

Information on the chemical resistance of thermoplastic and
elastomer materials can be found in our table of resistances
- on the Internet at www.buerkert.com or in a brochure
(order no. 00896009)

At operating temperatures above 20° C reduce the operating

pressure depending on the material as follows:

bar

PVC

16
14
12

10

8
6
4
2

0

20

40

60

°C

PVC

Fig. 4:

english

Type 2657

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