Marking Of The Fitting - Mankenberg VV Serie Originalbetriebsanleitung

Original operating manual
Vacuum breaker VV
These valves are no shut-off elements ensuring a tight closing of the valve. In accordance with
DIN EN 60534-4 and/or ANSI FCI 70-2 they may feature a leakage rate in closed position in
compliance with the leakage classes IV (0,01 % K
caution
The standard version of the vacuum breakers is no equipment part with safety function in
accordance with the Pressure Equipment Directive. Otherwise this fact would be taken into
account in the Declaration of Conformity.
caution
More than N=1000 alternating pressure loads from 0 bar up to PN (nominal pressure stage)
and/or from 0 bar up to PS (max. admissible outlet pressure) are not permitted.
The range of any number of pressure oscillations must not exceed 10% of the corresponding
note
PN (nominal pressure step) and/or PS (max. admissible outlet pressure).

3 Marking of the fitting

Each fitting bears the following markings as a minimum:
For
Manufacturer
Fitting design
Nominal diameter
Rated pressure
Max. permitted
temp.
Body material
Flow direction
The markings (in the case of fittings made of stainless steel, they are etched into the body or the flange) should
neither be covered nor painted over, so that the fitting remains identifiable.
VV-4.X.22.3 Issue 01.09.2022
Marking
MANKENBERG
vacuum breaker + type
e.g. DN or G and numerical
value
PN or Class and numerical
value
Temperature and numerical
value
e.g. CrNiMo steel
Indicated by an arrow
value).
vs
Remark
See section Further information [} 16] 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
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
5
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