Spirax Sarco RIM20, Инструкция по установке и обслуживанию, Страница: 26 / 132

IM-P198-05 MI Issue 2 26
3.10 Installation of meters with packing gland connection
(No Insertion Tool)*
Use the following formula to determine insertion depth for meters with a packing gland
connection (NPT and flanged) without an insertion tool.
Fig. 11 Insertion calculation (Meters without insertion tool)
Example:
To install a RIM20 flowmeter with a standard probe (S = 728.218 mm (28.67")) into a DN350
(14") schedule 40 pipe, the following measurements are taken:
F = 76.2 mm (3") R = 127 mm (5") t = 11.125 mm (0.438")
The example insertion length is 513.842 mm (20.23").
Insertion length formula
I = S - F - R - t
Where:
I
= Insertion length.
S = Stem length - the distance from
the center of the sensor head
to the base of the enclosure
adapter
S = 728.218 mm (28.67") for
standard probes;
S = 1 033.02 mm (40.67") for 304.8
mm (12") extended probes.
F = Distance from the raised face
of the flange or top of NPT
stem housing to the outside of
the pipe wall.
R = Pipe inside diameter ÷ 2 for
pipes DN250 (10") and smaller.
R = 127 mm (5") for pipe diameters
larger than 250 mm (10").
t = Thickness of the pipe wall.
(Measure the disk cut-out
from the tapping procedure or
check a piping handbook for
thickness.)
*
All dimensions
are in mm
(inches)
EXIT EN T ER
I
F
R
t
Flow
S