Maintenance; Lubrication; External Silicagel Cartridge; Inspection And Repair - DRESSER MZ 002-099-4115 Manual De Instrucciones

• Tools used for installing, removing, or repair-
ing the meter on site must be appropriate
for use in the hazardous area bearing in
mind that the hazardous area classification
during meter replacement may differ from
that during normal meter operations .
• The meter shall not be exposed to flames,
ionising radiation, and ultrasound .
• Pulse values and maximum frequencies are
given in Annex 1 . Electrical characteristics
and wiring of the socket are given in Annex
4 . The wiring of the transmitters is written on
the name plate of the meter .
5 Maintenance
When properly installed and put into service,
the MZ need no particular attention and will
provide you with many years of satisfactory
service .
5.1 Lubrication
Meters equipped with an oil pump have to
be periodically lubricated . Oil is delivered with
the meter . Specific oil has to be used, for ex-
ample
• Aeroshell fluid 12 MIL6085A
• Isoflex PDP38 (Klüber)
• Anderol 401D (Mobil Oil)
• Univis P38 (Shell)
Quantity of oil to be filled:
a) On commissioning to fill the volume
between the pump and the bearings
DN Oil vol . (cm
50/80 4
100 5
150/200 6
6
) Push
3
20
25
30
b) In Service
DN Oil vol . (cm
50/80
100
150/200
c) Recommended lubrication periodicity
Application
Dry gas, no dust
Gas comprising
light condensates
and little dust
Gas with high
percentage
of condensates
and dust .
BIOGAS
applications
5.2 External silicagel cartridge
The meter can be equipped with an external
silicagel cartridge for installation in severe
environment conditions . The cartridge has to
be replaced when its colour has changed . To
replace the cartridge, unscrew the old car-
tridge, remove the protective plug of the new
cartridge and screw it into the totaliser .
5.3 Inspection and repair
It is possible to check the good functioning
of the MZ by applying a spin test . This test will
give information about eventual friction in
the turbine ball bearings .
The test has to be conducted as follow:
• Accelerate the turbine wheel around 30 to
50% of Qmax then to measure the time until
the turbine wheel stops .
) Push
3
0,5 2-3
0,8 4
1,0 5
Lubrication periodicity
6 months
Monthly
Weekly