4
Signet 3719 pH/ORP Wet-Tap
Installation in Pipe Sizes 2.5 to 12 Inches
•
For reliable in-line measurements of pH and ORP, it is
imperative to position the electrode tip into the process
stream.
•
Because of its compact “short stroke” design, the 3719
requires low-pro
fi
le
fi
ttings to ensure
proper positioning in pipe sizes
DN65 to DN300 (2.5 to 12 inches).
•
It is strongly recommended to
use low-profi le PP clamp-on
saddle fi ttings (customer-
supplied).
•
Choose the 3719 version (-11
or -21) appropriate to the size
of the branch connection of the
required
fi
tting:
Use -11 for sizes DN65 to DN100
(2.5 to 4 in), and -21 for sizes
DN150 to DN300 (6 to 12 in.)
Installation in Pipe Sizes less than 2.5 Inches
•
It is possible to install the 3719 into pipe sizes below
2.5 inches by creating a “
fl
ow cell” with standard piping
components.
•
One simple solution, using a tee
fi
tting and reducer bushings,
is shown in the example below.
•
Many similar con
fi
gurations are conceivable in a wide
variety of materials, but be very careful to verify dimensional
compatibility.
•
Select an appropriate installation orientation to avoid the
entrapment of air inside the
fl
ow cell.
•
Contact your local Georg Fischer Sales and Support of
fi
ce
for assistance.
3-3719-11
pH/ORP Wet-Tap
(Fully Inserted)
2 in. Tee
(S x S x S)
1½ in. NPT
Threads
Flush Style Reducer
Bushings (Spg x S)
2 in. x ½ in.
2 in. x ¾ in.
2 in. x 1 in.
2 in. x 1¼ in.
2 in. x 1½ in.
3-3719-11
pH/ORP Wet-Tap
Flush Style Reducer Bushing
(Spg x FT) 2 in. x 1½ in.
250 mm
(9.9 in.)
45 mm
(1.75 in.)
115 mm
(4.5 in.)
218 mm
(8.57 in.)
OR
89.4 mm
(3.5 in.)
•
Provide 20 inches (minimum) clearance from the top of the
pipe for electrode removal..
Installation continued
Installation continued