ADAST V-line 899 LPG HYBRID Series, Руководство пользователя

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USER’S MANUAL V-line 899x.xxx/LPG HYBRID
12
4.3.1. The hydraulic system of the fuel dispenser V-line 899x.xxx/LPG - piston volumetric
flow meter ADAST M 406.xxxx:
Position Hydraulics components LPG dispenser
1 Separator ADAST N 821.20/1, 821.20/1/ATC
2 LPG piston meter and an integrated magnetic
pulse transmitter M 406.xxP, M 406.xxP/1, M
406.xxЕP, M 406.xxЕP/1
3 Magnetic pulse transmitter ELTOMATIC ME 01-
05 or ME 01-05-05 or METRA MTX 075 or
ADAST40
4 Differential valve ADAST V 860.20/LPG
5 Electromagnetic valve
6 Sight glass LPG – ADAST (optionally)
7 Snímač teploty LPG Pt 100 - ZPA
8 Manometer 0/25 bar
9 Ball valve G 1/2― metrological branch
In normal operation LPG is always in the liquid phase in the hydraulic system of the LPG dispenser.
A spherical cock (in the LPG piping) and a separator with a filter which forms one assembly unit with a
check valve of the liquid phase and pressure release valve and safety valve of gaseous phase are located
at the bottom of the fuel dispenser. A medium temperature resistance transmitter is connected to the
separator from the bottom for the dispensers designed with automatic temperature compensation of
dispensed volume in relation to its momentary temperature (ATC).
A metrological branch with a spherical cock G 1/2" for metrological verification and service purposes is
a part of the separator return piping.
A piston meter fitted with a sensor of impulses transmitted to the counter is connected to the separator
output through a pipe connection. The meter is fitted with pressure control valve keeping the medium in
the meter in liquid phase. The output from a differential valve is connected through an electromagnetic
valve to a sight-glass to which the dispensing hose with the dispensing nozzle is connected.
The dispensing hose is connected through safety breaking or rupture coupling.
The LPG being dispensed is supplied by a pump built-in in the storage tank area. At first the LPG flows
through the spherical cock and the filter into the separator. In case the liquid contains gaseous
components they should be separated and returned through the nozzle in the separator upper part and the
return piping which has to be open (if the dispenser is in operation) to the section of the storage tank that
contains the gaseous phase.
T
he return piping internal diameter should be DN 16 mm (1/2") at least. The gaseous phase space of
the differential valve is connected to the return piping.
If required, the LPG dispenser can be fitted with a two-stage electromagnetic valve closing the LPG flow
during dispensing by means of preselection.