7 Preservation
7.3 Preserving the outer surfaces
Aids: o Preservative (acid-free and resin-free oil)
1. Close a connection of the flowmeter with a blind flange.
2. Position the flowmeter vertically.
3. Fill non-corrosive and resin-free oil into the pressure connection up to approx. 1cm under the
flange at the top while turning the measuring unit slowly, so that the measuring unit is also
wetted.
4. Close the upper connection with a blind flange.
5. After about six months storage check the filling level of the oil and if necessary top up.
7.3 Preserving the outer surfaces
Personnel qualification: o Trained personnel
Personal protective equipment: o Work clothing
o Protective gloves
o Safety boots
Aids: o Castrol Rustilo DWX 33 or other preservative offering compar-
able protection
1. Paint or spray the preservative onto all plain and unpainted parts.
2. At intervals of about six months check the preservation and if necessary repeat.
7.4 Removing the preservation
Personnel qualification: o Trained personnel
Personal protective equipment: o Work clothing
o Protective gloves
o Safety boots
Aids: o Solvent
o Collection tank
CAUTION
Risk of injury through emitted preservative.
► Wear personal protective clothing during all the work.
► Collect any discharging preservative safely and dispose of it in an environmentally compatible
manner in accordance with the applicable local regulations.
1. Remove one of the blind flanges.
2. Drain the flowmeter, collecting the preservative oil in a suitable vessel.
3. Remove the second blind flange.
4. Either remove the residual oil with solvent or flush the flowmeter with pumped liquid.
Operating instructions
OIO 14en-GB Edition 2020-01
23
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