Flow sensors
DN15, 20, 25: with threaded ends
DN40: with threaded ends
DN15, 20, 25: with flanges (DIN 2501/SN 21843)
DN40, 50: with flanges (DIN 2501/SN 21843)
CONTOIL
®
23
Servicing / repairs
Safety precautions
Before working on the hydraulics:
To restart the plant:
• put the plant or section out of operation
• slowly open the stop valves, avoiding pressure surges ('water hammer')
• close the stop valves
• vent the pipe well
• release the pressure
• check tightness
Dirt filter
Dirt filters must be cleaned periodically, initially at short intervals.
Maintenance, spare parts
Check connections periodically for tightness and if necessary tighten again. For control and cleaning, the measuring chamber and the ring
piston of the meters DN15 … 50 can be removed without dismantling the meter from the pipe.
The cleaning and revision cycle depends largely on the conditions of operation. Under favourable conditions 5 … 10 years suffice. Check
the units for corrosion. When ancillary equipment is used, observe their mounting and operation instructions.
Spare part lists may be requested from
Fa. Ehlers
.
Torque of measuring chamber screws
Flow meter
Screws
Torque
DN 15,20
M 6
6 Nm
DN 25
M 8
16 Nm
DN 40
M 12
47 Nm
DN 50
M 16
100 Nm
Dimensional drawings
B
F
L
b
h1
h2
H
B
F
L
b
h1
h2
H
