Burkert 2657, Operating Instructions Manual, Page: 13 / 75

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