Smart Valve" Valve Function; Maintenance/Removal; Technical Data; Diaphragm Gas Meters Bk - Elster BK-G1.6 Operating Instructions Manual

"Smart Valve" valve function

The "Smart Valve" is switched remotely by the data
management system. The valve first switches to the
"Released" position. From the "Released" position, the
valve automatically switches to the "Open" position,
if the downstream installation is tight.
Released
The "Smart Valve" opens an internal bypass and
releases a minimum gas flow into the customer's
closed consumer piping. Pressure equalisation takes
place between the inlet and outlet side of the valve.
Open
Following pressure equalisation, the valve automati-
cally opens by spring force and fully releases the
gas supply. If consumers of the customer are open,
pressure equalisation cannot occur and the valve
remains in the "Released" position and continues to
release only the minimum gas flow rate of the bypass.
Closed
The valve and the bypass are closed in the event of
remote shut-down.
▷ All valve positions are kept de-energised. ▷

Maintenance/Removal

Gas meters BK-G1.6 to 25 from Elster are mainte-
nance-free.
▷ When used for custody transfer measurements, ▷
recalibration must be carried out in accordance
with national Directives.
▷ If the screw unions are loosened for maintenance ▷
work or retesting, replace the seals.
▷ After the gas meter has been removed, immedi- ▷
ately close the connectors with protective caps,
in order to prevent an ingress of dirt particles.
WARNING
A certain amount of gas may remain in the gas
meter. Taking into consideration the risk of explo-
sion, it is important to adopt safety measures, e.g.:
– Following removal of the gas meter, purge it thor-
oughly with inert gas.
– For transporting the gas meter with gas residue,
use a vehicle with an open or a ventilated loading
area.

Technical data

Diaphragm gas meters BK

Gas type: natural gas, town gas, propane and butane,
as gases of the first to third families pursuant to
DIN EN 437:2003 (DVGW Code of Practice G260).
Max. allowable operating pressure p
[Type label/Index plate – p. 2].
Max. allowable measuring range Q
[Type label/Index plate – p. 2].
Max. allowable ambient temperature range t
[Type label/Index plate – p. 2].
Max. allowable storage temperature range: -25 to
+60°C.
Gas temperature t
lies within the error limits set out in the Directive, see
[Type label/Index plate – p. 2]. If no gas temperature
t is specified on the index plate, t
g

Diaphragm gas meters BK with explosion

protection

Max. allowable ambient temperature range t
temperature range t
see [Type label/Index plate – p. 2].

Diaphragm gas meters BK with integrated

"Smart Valve"

Opening time from closed to open/released state:
≤ 4 s,
closing time: ≤ 0.5 s.
Min. operating pressure: 17.5 mbar.
Allowed leakage flow in the customer's piping:
valve released: max. 13 l/h at 35 mbar,
valve closed: max. 5 l/h.
GB-4
, see
max.
/Q
min. max.
, where the measuring error still
g
= t applies.
g m
: -20 to +55°C, for constraints
g
, see
, see
m
/gas
m