Diaphragm Pressure Keeping Valve
Operating Instructions
TA 49
Rev.
13 en
05/2016
Technical modifications reserved!
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3
1
General
Before commissioning and during operation of the
sera
dia-
phragm pressure keeping valve the respective regulations val-
id at the place of installation are to be observed.
sera
diaphragm pressure keeping valves are delivered ready
for assembly.
Carefully read these instructions and especially the safety in-
structions herein contained before installation and initial start-
up of the valves.
sera
diaphragm pressure keeping valves prevent excess sup-
ply of the dosing pump if the geodetic conditions are unfavour-
able. The set pressure of the valve generates the positive
pressure difference required between pressure- and suction
side of the pump.
2
Types
2.1
Type plate
Each
sera
diaphragm pressure keeping valve is factory pro-
vided with a type plate. The following information can be found
on this type plate.
1
2
3
4
5
6
Fig. 01 Type plate
Explanation of the indications on the type
plate
1
Pe
Set pressure:
The set pressure corresponds to the
overpressure (at the valve inlet) at
which the valve opens under test condi-
tions (atmospheric pressure at the valve
outlet).
2
Mat.
Materials:
Material specifications for housing / dia-
phragm according to DIN/ISO
3
Type
Diaphragm pressure keeping valve
type
4
No.
Serial number of the diaphragm
pressure keeping valve
5
DN
Nominal width:
The nominal width is a characteristic
parameter which is used for pipes and
parts, e.g. tubes, tube connections, fit-
tings etc. matching each other.
Nominal widths correspond to the pipe
diameter in mm.
6
PN
Nominal pressure:
The nominal pressure is the permissible
operating pressure in bar at 20° C.
Table 01 Explanation of type plate
