Chemical Tee Remote Seal (S26Cn) - ABB S26 Series Operating Instruction

5.2 Chemical Tee Remote Seal (S26CN)

The chemical tee remote seal is designed to connect to a
1630L Wedge Flow Element or to any process fitting with
appropriate mating surfaces.
Chemical tee elements cannot be connected to a standard
ASME or EN pipe flange.
Please note that the pressure limit for a transmitter with this
remote seal is determined by the seal flange. Maximum
working pressure for the flange is 2 MPa (20 bar or 290 psi).
The gaskets required to connect the seal are available with
the seal element system and can be manufactured either in
PTFE or in graphite. Their relevant process temperature limits
are listed in the product datasheet.
The eight cap screws required to connect each seal are
supplied with the wedge flow element. These gaskets and bolts
have been specifically selected to meet the sealing and
pressure rating requirements of the chemical tee element.
Substitution of these supplied elements with other selected by
the user is not recommended.
Note. If the transmitter is a DP with one remote seal for liquid level
measurement, refer to Section "Connecting the Low Side
Compensating Leg on DP with One Seal" before connecting the seal.
Connect the seal as follows:
1. Remove protective covering from seal.
2. Place the gasket on sealing surface and insert seal into
connection opening.
25 (1)
3. Insert 8 cap screws and finger tighten each screw.
4. Following a diagonal sequence, tighten each cap screw
to a torque of 12.4 Nm.
If you experience a large Zero shift due to temperature change
or erratic output:
1. Take the chemical tee seals and mount them face up
several feet above the transmitter.
2. Wait an hour.
3. With your thumbs at the"9 o'clock and 3 o'clock"
positions on a single diaphragm, lightly apply thumb
pressure alternating right thumb/left thumb. As you press
with the right, the left side of the diaphragm should rise
evenly.
If it does not rise then there is a lack of fill. Replace the seal.
If it rises and then snaps (like an oil can) then the diaphragm
has been stressed. Replace the seal.
4. Lightly tap the diaphragms with the flat part of your
fingernail. A dull thud is heard when fill is behind the
diaphragm.
If there is air present, the sound will be "Tinny". Replace the seal.
13 (0.47)
134 (5.3)
Figure 15: Chemical Tee remote seal
25 (1)
13 (0.47)
134 (5.3)
8 Mounting Holes dia.9 (0.34)
equally spaced
This kind of diaphragm seal has been designed to be
connected to ABB Wedge primary element model WRC.
For vacuum service recommendations, process temperature
limits, temperature effects and configuration, please refer to
product datasheet.
2600T Series Pressure transmitters | OI/S266-EN Rev. B 15
8 Mounting Holes dia.9 (0.34)
Ø 111 (4.38)
Ø 127 (5)
equally spaced