Pressure Transmitter; Sealing And Screw Connections - ABB 265GS Operating Instruction

Mounting
4.3

Pressure transmitter

The pressure transmitter can be mounted directly on the shut-off valves. A mounting bracket for
wall or pipe mounting (2" pipe) is also available as an accessory.
Ideally, the pressure transmitter should be mounted in a vertical position to prevent subsequent
zero position shifts.
IMPORTANT (NOTE)
If the pressure transmitter is installed at an angle, depending on the measuring range the
filling liquid exerts hydrostatic pressure on the measuring diaphragm, resulting in a zero
position shift. In such an event, the zero position will need to be corrected.
However, generally speaking the pressure transmitter can be used in any mounting position. It
is mounted by following the same guidelines as for a manometer.
For mounting options with a bracket, see the section "Technical data".
4.4

Sealing and screw connections

Connecting G ½ B spigot:
For sealing, a flat gasket must be used in accordance with DIN EN 837-1.
NPT threaded connection:
Seal the threads with Teflon or another approved resistant sealant.
Process connection with front-bonded diaphragm:
Prior to mounting the device, install a welded connection or tapped hole according to relevant
soldering standards (for process connection and welded connection dimensions, see "Technical
data").
Process connection for ball valve:
An appropriate ball valve connection or weld-in sleeve is required for mounting purposes. In this
case, the seal is formed by a cone at the outer end of the process connection (metal/metal). For
information on the weld-in sleeve, see the section "Technical data".
26 265Gx, 265Ax IM/265Gx/Ax-EN-07