WIKA PG28 Betriebsanleitung Seite 16

5. Commissioning, operation
With parallel male threads (e.g. G ½ B), use flat gaskets, lens-type
„
sealing rings or WIKA profile sealings.
With tapered threads (e.g. NPT threads), sealing is made in the
„
threads, using a suitable sealing material (EN 837-2).
When screwing the instruments in, the force required for sealing must
„
not be applied through the case, but only through the spanner flats
EN
provided for this purpose, and using a suitable tool.
The tightening torque is dependent on the selected process
„
connection.
16
Spanner flats
Sealing face
WIKA operating instructions pressure gauge, model PG28
Installation with open-ended spanner
Sealing
in the thread