Burkert Type 8750 - Manual (Page 7)

I NSTALLATION
8750 - 5
Description
The Flow Control System FMR Typ 8750 was developed for the control of propellent air for
the pneumatic conveyance of pourable solid media (e.g. plastics granulates) over long
distances. Following its success in this application, the FMR was used in the control of
combustion air and gases (e.g. combustion in ceramic furnaces) and for the control of the
propellent (e.g. air, nitrogen) in pigging installations.
The system consists of
-
a control valve Type 2712 with TopControl Continuous Type 8630
-
two pressure sensors Type 8323
-
and optionally a temperature transmitter.
These components together form a module.
•
All operating functions are executed via 3 function keys.
• The operating menu of the FMR is delivered with factory settings.
• The real flow characteristic curve for the current control valve is stored point-for-point in 5
% steps in the memory of the controller.
• The sensors are built into the connecting tubes to the valve.
• To cover a wide variety of control applications, a broad spectrum of nominal diameters
and seat combinations is available.
• The valve seats may be exchanged as required.
• The outlet sections are already integrated in the system.
• The pressure drop over the control valve (acting as a restriction) is measured
continuously by the two pressure sensors. This pressure difference and the valve flow
characteristic are the parameters for determination of the volumetric flow through the
control valve, i.e. for the process value. This measured value is compared with the
setpoint, evaluated in a PID controller and set on the positioner as the new setpoint.
NOTE Change the factory settings of the operating menu only if required by
concrete process conditions.
NOTE Before first commissioning, check the factory settings and set the
process parameters that are still open.
With these settings, the controller parameters are adapted to system
behaviour in the subroutines AUTO and Process-TUNE.
ATTENTION! On assembly of the module, the intake sections to EN ISO 5167-1
must be observed (shown in the section "Intake sections to
EN ISO 5167-1").