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2.1 Before You Begin
After unpacking the unit, check the equipment for compliance and any damage that may have occurred during shipment.
Immediately contact a Welker representative if you received damaged equipment.
When sealing fittings with PTFE tape, refer to the proper sealing instructions for the brand used.
1.
For sampling applications, Welker recommends that the unit be inserted into the center one-third (¹⁄₃) of the pipeline in
a location where the product is well-mixed and will yield an accurate and representative sample.
2.
For gas sampling applications, Welker recommends that the unit be installed in the top of the pipe.
3.
For liquid sampling applications, Welker recommends that the unit be installed in the side of the pipe.
4.
For liquid sampling applications, locate the unit two to four pipe diameters (2–4D) downstream of an inline static mixer
or other flow conditioning system.
5.
Handle the unit with care.
2.2 Installation and Operation
1.
Depressurize the pipeline.
The pipeline must be depressurized prior to installing and removing the unit.
2.
As necessary, install valves to the pipeline connection (Figure 1). One will be product outlet (P₁) valve A, and the other
will be product return (P₂) valve B.
3.
Ensure that product outlet (P₁) valve A and product return (P₂) valve B are closed (Figure 2, Figure 3, or Figure 4). As
necessary, cut off excess tubing from the probe. Using tubing cutters, remove the excess tubing, and then file and
smooth the cut edge of the probe.
4.
If the probe tip is scooped or beveled, determine the direction of product flow in the pipeline. For the Pitot Probe to
function correctly, it must be installed so that the scooped probe tip is open against the direction of product flow.
If applicable, refer to the flow direction stamped on the pipeline connection or handle to determine correct orientation before
installing the Pitot Probe to the pipeline.
5.
If the Pitot Probe has an MNPT pipeline connection, continue to step 6. If the Pitot Probe has a flanged pipeline
connection, proceed to step 9.
11
IOM-101
MODELS: PP-1, PP-2, PP-3, and PP-F
SECTION 2: INSTALLATION & OPERATION
REV: C
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
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