BERTHOLD TECHNOLOGIES LB 3602, Руководство по эксплуатации

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LB 379
14
2.1.1.2 Measuring Path LB 3601
1. The permissible operating pressure of the product pipe made of polypropylene de-
creases with increasing temperature. The following values must not be exceeded:
Temperature
max. pressure in kp/cm
2
20 10
30 10
40 6.2
50 5
60 3.6
70 2.2
80 1.2
90 0.8
2. You have to check whether the material of the product pipe is suitable for the intended
application.
3. Do not open the sealed screws.
C
AUTION
:
A damaged measuring path must be disassembled immediately.
Please inform immediately:
a) the manufacturer or their local agent
b) the competent supervisory authority.
2.1.2 Selection of Measuring Site
When selecting the installation site, please keep in mind:
a) The pipeline must always be completely filled at the measuring site with the product
to be measured during the operation.
b) Corrosion, abrasion or wall deposits must not occur at the pipeline walls. This hazard
is least likely with installations on vertical pipes.
c) Gas bubbles in the product falsify the results. This risk can be avoided or at least
reduced by:
 Performing measurements under fairly high pressure (see 2.1) (installation in
pressure pipes, at the foot of a standpipe).
 If no air bubbles are to be expected in the product, the suction side of the pump
should preferably be used for installation to exclude air bubbles which might oc-
cur as a result of damaged pump seals.
 Measurements on horizontal pipelines should be performed using horizontal irra-
diation to reduce errors caused by deposit formation and gas bubbles (see Figure
50).