14.2.2
Metering precision
14.3
Viscosity
14.4
Wetted materials
with DN 25 ball valve
Material version
Liquid end
PPT
Polypropylene
PCT
PVC
TTT
PTFE with carbon
SST
Stainless steel
1.4571/1.4404
HCT
Hastelloy C4
with DN 32 / DN 40 plate valves**
Material version
Liquid end
PPT
Polypropylene
PCT
PVC
TTT
PTFE with carbon
Data
Metering precision
* at maximum stroke length and maximum back pressure
The liquid ends are generally suitable for the following viscosity ranges:
Design
no valve springs
with valve springs
with appropriately
designed installation
with appropriately
designed installation
and advice from ProM‐
inent
* Only when the installation is correctly adjusted
Suction/pressure
Seals
connector
PVDF
PTFE
PVDF
PTFE
PTFE with
PTFE
carbon
Stainless steel
PTFE
1.4571/1.4404
Hastelloy C4
PTFE
Suction/pressure
Seals
connector
Polypropylene
PTFE
PVC
PTFE
PTFE with
PTFE
carbon
Range
Unit
0 ... 200 mPas
200 ... 500 mPas
500 ... 1000 mPas
> 1000 mPas
Valve balls
Borosilicate glass
Borosilicate glass
Ceramic
Stainless steel
1.4401
Ceramic
Valve plates / valve
spring
Ceramic / Hast. C +
CTFE**
Ceramic / Hast. C +
CTFE**
Ceramic / Hast. C +
CTFE**
Technical data
Value Unit
±1 % *
Valve seat
PTFE
PTFE
PTFE
PTFE
PTFE
Valve seat
PTFE
PTFE
PTFE
55