8
P3MBP Blue
Line
A1710-3.3 en
HBM
2
Construction and operating mode
Blue
Line
series pressure transducers (5000 bar, 10,000 bar, 15,000 bar) have
been designed to measure static and dynamic pressures of fluids.
The development of the P3MB Blue
Line
was based on HBM’s years of expe-
rience in high pressure technology.
Since 1970, devices in accordance with the P3M principle have been working
successfully with a nominal (rated) measuring range up to 3600 bar.
A large number of devices have proved themselves in dynamic applications.
We are now adding to this type series in the high-pressure direction with the
nominal (rated) measuring range 5000 bar and also adding devices with a
range of 10,000 bar and 15,000 bar
The P3MB Blue
Line
is suitable for dynamic applications:
•
The measuring body is made of field-tested, ductile steel
•
P3MB measuring bodies for higher pressures with their threaded connector
are made of a single piece of rolled steel – there is no weld or any other
sort of sealing or jointing point.
•
The size of the chosen output signal is big enough to enable measured
value adjustments to be made without too much extra work. On the other
hand, the choice of output signal – or the stresses and strains - should be
small enough for dynamic loading to be possible (without the premature
signs of material fatigue).
•
Any fluid or gas (vapour) that does not attack these steels is a suitable
measurement medium. The pressure transducer and its threaded connector
are strengthened for the purpose of the pressure connector and can be
installed anywhere. In particular cases there are specific instructions in
Chapter 3 ”Mounting” which must be followed!
The stated properties are protected by FEM calculations and dynamic loading
tests.
The stated measuring body design, chosen for all devices of the P3MB type
series of measuring ranges 500 bar and above, enables the P3MB to meet a
higher safety standard.
Years of reliable use under dynamic load and in rough operating conditions
provide practical proof that the P3MB has a safe and robust design.
Strain gages (S.G.) are attached directly above the measurement hole. They
are coupled to a Wheatstone bridge and to protect them from harsh ambient
conditions, are located in a hermetically sealed reference chamber. This is
made of stainless steel. In this way, the reliability and precision of the trans-
ducers is assured, even if operating conditions are persistently rough.
