Operating Instructions KDF-9/KDG-9
Page 9
KDF-9/KDG-9 K04/0922
The measured values only apply to the calibrated fluid data stated on the scale. Any change or deviation
in pressure will cause a display fault.
6.3.6 Pressure loss
Depends on the measuring range.
(see measuring range tables in Section 3.2)
7 Design details
7.1 Design/dimensions
The meter consists of a conical measuring tube made of borosilicate glass with a vertically movable float
made of stainless steel or glass. The measuring tube is installed in the device fitting and does have a hor-
izontal connection on the rear.
The standard version of the device is equipped with an adjusting valve at the outlet
KDF-9/KDG-9 ( dimensions in mm )
7.2 Design / dimensions / operating details E/F/A/B (option differential pressure
regulator)
Differential pressure regulators are used to achieve constant flow values at variable inlet and outlet pres-
sures.
Differential pressure regulators are not pressure reduction valves
The measuring device consists of variable area flowmeter with control valve and mounted differential
pressure regulator.
The flow amount will be adjusted via the integrated adjusting valve.
The max.one side pressure resistance of the regulator membrane is 7 bar. If the operating pressure ex-
ceeds 7 bar, the control valve must not be fully closed as this leads into overstressing the membrane.
IMPORTANT OPERATION DETAILS
The installation of any valve before the inlet and outlet of the instrument shall be avoided
Initial operation / start up of the process only with opened control valve
When operating any gas the inlet pressure shall be increased slowly to avoid strong pressure
peaks
Any operation of the instrument trough any solenoid valve shall be avoided, this will prevent
the float will be thrown upwards heavily.
For the operation of the regulator minimum inlet pressure are required.
Regulator with constant outlet pressure:
350 mbar
Regulator with constant inlet pressure:
350 mbar
The threaded pins M4 are only mounted if the option
„Wall Mounting“ has been selected.