Parker Zander HDK-MT 10-100, Руководство по эксплуатации

Страница: 16 / 55

Available options
16 HDK-MT350_EN_04
Available options
The following options are available for the dryer:

Start-up device

Auxiliary heater

Bypass line

Signalling contacts of control system

Compressor synchronisation

Dewpoint-sensing control

Condensate drain pipe for preliminary and afterfilter
Pressure maintaining valve (also: start-up device)
A pressure maintaining valve is implemented downstream of the dryer. It ensures
fast pressure build-up and prevents pressure spikes in the drying agent bed. This
also prolongs the drying agent service life. A pressure maintaining valve must be
installed. The operator can either purchase and have the pressure maintaining
valve installed from the manufacturer or assign installation to an authorised fitter.
Auxiliary heater
For installation sites with temperatures under +1 ºC (33,8 °F), the wet side of the
dryer must be equipped with an auxiliary heater to prevent valves, cocks, flaps,
and other components from freezing up.
Bypass line
The bypass line is a "detour line", which allows the compressed air system to
continue operating even whilst maintenance of the dryer is in progress. However,
during this time the air is not dried but flows through the bypass line past the
dryer and through to the actual loads. Filters in the bypass line are meaningful so
that the actual loads are largely protected against dirt, water, and oil droplets
even whilst maintenance is in progress.
Signalling contacts of the control system
The control system is equipped with a digital input for the synchronised operation
with a compressor. This feature allows for synchronised and thus efficient dryer
operation with discontinuous compressor operation.The control system can also
be equipped with an optional operation signalling contact with which the dryer
operation can be monitored from an external device.
Compressor synchronisation
Compressor synchronisation helps reduce energy costs, as the dryer can be
operated independently of the compressor. When the compressor is switched off,
the regeneration gas return ensures that regeneration is continued, as soon as a
certain compressed air volume is reached behind the dryer. The regeneration
process must be continued and ended so that the drying agent does not become
unusable prematurely.
The compressor synchronisation controller is a higher-level controller than the
pressure dew point controller (see below). When both options are in place, the
compressor synchronisation controller is treated as the prime controller.