WIKA BNA - Handbuch (Seite 10)

GB
10 WIKA operating instructions bypass level indicator model BNA
112195.01 11/2012 GB/D
3. Installation and commissioning
Installation and commissioning of the bypass level indicator in a
heated double-walled version
The bypass tube can also be delivered in a heated double-
walled version. In this case, the bypass tube is surrounded
by a second tube. Heated liquid or steam (heat carrier) can
flow through this double-sheathed space via two connec-
tions. The materials for higher temperatures must be desig-
ned according to AD information sheets in non-corroding
qualities.
The heating sheath of the bypass level indicators may only
be used according to the specified maximum values for
pressure and temperature.
Attachment of the evaluation devices to the bypass level indicator
When attaching the evaluation devices (e.g.: WIKA sensors MG …,
WIKA magnetic switches) to the BNA …, the respective maximum
values of the field instrument must be heeded. The applicable laws or
directives for the use or the planned purpose of application must also be
observed.
Attachment example (sensor MG… to the bypass tube)
This description is only intended as an orientation aid for the
local installation situation. Please refer to the mounting and
operating instructions of the attachment devices as well.