* for measurements taken under constant conditions, minimum
30% stroke rate and water at 20 °C - when installed correctly, p< 1
bar
13.2.2 Dosing precision
Data
Value Unit
Dosing precision
±1 % *
* at maximum stroke length and maximum back pressure
13.3 Viscosity
The liquid ends are generally suitable for the following viscosity
ranges:
Design
Area
Unit
no valve springs
0 ... 200 mPas
with valve springs
200 ... 500 mPas
with appropriately laid out installa‐
tion
500 ... 1000 mPas
with appropriately laid out installa‐
tion and advice from ProMinent
over 1000 mPas
* Only when the installation is correctly adjusted.
13.4 Wetted materials
Tab. 4: with DN 25 ball valve
Material ver‐
sion
Liquid end
Suction/pres‐
sure connector
Seals
Valve balls
Valve seat
PPT
Polypropylene
PVDF
PTFE
Borosilicate glass
PTFE
PCT
PVC
PVDF
PTFE
Borosilicate glass
PTFE
TTT
PTFE with
carbon
PTFE with
carbon
PTFE
Ceramic
PTFE
SST
Stainless steel
1.4571/1.4404
Stainless steel
1.4571/1.4404
PTFE
Stainless steel
1.4401
PTFE
HCT
Hastelloy C4
Hastelloy C4
PTFE
Ceramic
PTFE
Technical data
75