Accessories; Valve Block; Shut-Off And Equalizing Valves; Compensation Chambers - Samson Media 05 Mounting And Operating Instructions

Accessories

4 Accessories
We recommend installing a shut-off valve in
the differential pressure lines as well as an
equalizing valve. They can be used to shut
off both differential pressure lines and to by-
pass the indicating unit when checking zero.

4.1 Valve block

A valve block comprising three valves (see
Fig. 4) is available as SAMSON accessories.
It is attached directly to the bottom of the dp
cell.
When measuring the flow rate of liquids and
gases, the SAMSON valve block can also be
mounted upside down to ensure the assign-
ment of plus (+) to plus (+) and minus (–) to
minus (–) remains unchanged. Due to this re-
verse installation, however, the pressure
gauge connection cannot be used anymore
and must be sealed with an O-ring and a
G ½ - LH screw cap (see Dimensions, sec-
tion 8).
4.2 Shut-off and equalizing
valves
As an alternative to the SAMSON valve
block, the two shut-off valves as well as the
bypass valve/equalizing valve can also be
installed as illustrated in Fig. 5.
16

4.3 Compensation chambers

Compensation chambers that establish a
constant liquid column are required when
measuring steam. When measuring liquids,
they are only required when the indicating
unit is mounted above the measuring point.
For gas measurements, separation chambers
are required for condensate separation
when the indicating unit is installed below
the measuring point.

4.4 Accessories for connection

The devices are delivered without screw fit-
tings (oxygen versions are protected against
contamination by four NBR blanking plugs).
Required screw fittings, screw plugs or vent
screws as well as screw joints with restric-
tions to dampen medium-induced vibration
(particularly when measuring gases) must be
ordered separately.
Note
The screw fittings and SAMSON valve blocks
with their associated order numbers are list-
ed in Data Sheet u T 9555.
NOTICE
!
Oxygen service: make sure that the dp cell
and all SAMSON accessories only come into
contact with gaseous oxygen.
EB 9520 EN