Marking Of The Fitting; Safety Instructions - Mankenberg NV 93 Betriebsanleitung

2 Marking of the fitting

Each fitting bears the following markings as a minimum:
For Marking
Manufacturer MANKENBERG
Float valve + type
Fitting design
e.g. DN or G and numerical va-
Nominal diameter
lue
Nominal pressure PN or Class and numerical value
Working Operating pressure range and
pressure range numerical values
Max. permitted
Temperature and numerical value
temp.
Body material e.g. CrNiMo steel
Flow direction Indicated by an arrow
The markings (in the case of fittings made of deep-drawn stainless steel, they are etched into the body)
should neither be covered nor painted over, so that the fitting remains identifiable.

3 Safety instructions

3.1 General precaution
The same safety regulations apply to a fitting as to the system into which it is installed. These instructions
only give those safety recommendations that have to be additionally observed for the fitting.
3.2 Special safety instructions for the plant operator
The following requirements for the intended use of a fitting are not the responsibility of the
manufacturer but have to be guaranteed by the user:
• The fitting may only be employed for the purpose described in Section 1 <Intended use>.
•
Only competent specialist personnel may install, operate and service the fitting. Competent as
defined in these instructions refers to persons who, because of their training, specialist knowledge
and professional experience, are capable of correctly assessing and properly executing the work with
which they are entrusted and of recognizing and rectifying hazards.
The pipeline system must be properly designed and installed so that the fitting can be mounted and
•
operated without any tension.
The fitting must be properly installed in the correct mounting position.
•
The usual flow rates should not be exceeded in the pipeline section during continuous operation, and
•
abnormal operating conditions such as vibrations, water shocks and cavitation should be avoided or
– if unavoidable – clarified with the manufacturer in advance.
The prevailing operating conditions must comply with the limits of the design data stated in the
•
MANKENBERG order confirmation.
Hard or sharp objects in the flowing medium could damage internal functional parts of the fitting.
•
A strainer or filter should be installed upstream of the fitting.
The corrosion protection for the fitting must be adapted to the local environmental conditions.
•
The fitting must not be coated with thermal insulation.
•
Detailed notes are provided on some of these prerequisites in the following sections.
Remark
See Section 11 <Further information> for the address
Design name as per accompanying MANKENBERG data
sheet
Numerical value for DN in [mm], for G in [inches]
Numerical value for PN in [bar], for Class in [lbs/square inch]
Pressure data are displayed as overpressure above the
atmospheric pressure
Numerical value for the lower and upper limit
Temperatures above 50 °C entail a reduced pressure
resistance. This must be considered for the corresponding
material in accordance with the DIN EN 1092 standard
CrNiMo steel = high-alloy austenitic steel
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