Description:
Capillaries are used to mount pressure gauges, pressure switches or
transmitters in a certain distance from the pipe or the tank.
This can be useful to separate the instrument from high or low fluid
temperature or vibrations or to mount the pressure gauge at a place
with better visibility. It can also reduce the influence of pulsations on
the instrument.
Capillaries can also be used between measuring instruments and
diaphragm seals.
The capillaries can be used without diaphragm seal, if the fluid does not
attack 1.4404 (316L) stainless steel and the viscosity is compatible with
the internal diameter.
The value of the temperature reduction per meter of capillary depends
on several conditions. A good estimation is a reduction of the fluid
temperature of 100 K/m.