
Material specifications
Pos.
Description
PPE
PPB
PCE
PCB
PVT
SST
1.19
Valve housing
PP
PVC-U
PVDF
1.4404
2
Spring dome
PP GF30
3
Separating disc
PP
PVC-U
PVDF
1.4404
4
Thrust washer
POM
5
Diaphragm
EPDM / PTFE - laminated
6
Pressure plate
Steel, nickel plated
7
Spring collar
POM
8
Compression spring Steel, galvanized
9
Ball
1.3541
10
Plunger
PP*
PVC-U*
PVDF
PTFE nat‐
ural
11
Protective cap
PE
12-14,
17****,
18
Housing screws,
nuts, washers
V2A
15
Seal
EPDM
FKM
EPDM
FKM
FKM
PTFE***
16
Piston seal
EPDM²
FKM
EPDM²
FKM
PTFE**
PTFE**
FKM = fluorine rubber
* or high quality PVDF
** cover ring PTFE / FKM
*** shaped composite seal PTFE / EPDM
**** Bolt protective caps for SST in PE
² With DN32, DN40: The piston seal is a PTFE / FKM cover ring
For the item numbers, see the "Exploded view DHV-U diagram" after the title page of the operating
instructions as a whole or the cross-sectional view in the "Repairs" chapter
Combination options
The combination options back pressure valve / metering pump are limited by the maximum flow Q
max
of the back pressure valve.
Technical data
62