Welker APP-5 User manual

© Copyright 2009, Welker, Inc.
Welker®Adjustable Pitot Probe
Model
APP-5
The information in this manual has been carefully checked for accuracy and is intended to be used as a
guide for the installation, operation, and maintenance of the Welker equipment described above. Correct
operating and/or installation techniques, however, are the responsibility of the end user. Welker reserves
the right to make changes to this and all products in order to improve performance and reliability.
13839 West Bellfort
Sugar Land, TX 77498-1671
[phone] - Office
[phone] - USA Only
[phone] - Fax
http://www.welkereng.com

TABLE OF CONTENTS
IOM-104 Page 2 of 10
APP-5
Rev: B
Last updated: 9/8/2009
1. GENERAL 3
1.1 INTRODUCTION 3
1.2 DESCRIPTION OF PRODUCT 3
1.3 SPECIFICATIONS 4
1.4 DIAGRAM 5
2. INSTALLATION & OPERATION 6
2.1 GENERAL 6
2.2 PREPARING THE PROBE FOR INSTALLATION6
2.3 INSTALLING THE PROBE 7
2.4 HELPFUL HINTS 8
2.5 RETRACTING THE PROBE 8
3. MAINTENANCE 9
3.1 GENERAL 9
Welker®, Welker Jet®, and WelkerScope®are Registered Trademarks owned by Welker, Inc.

SPECIFICATIONS
IOM-104 Page 3 of 10
APP-5
Rev: B
Last updated: 9/8/2009
1. GENERAL
1.1 INTRODUCTION
We appreciate your business and your choice of Welker products. The installation,
operation, and maintenance liability for this product becomes that of the purchaser at the
time of receipt. Reading the applicable Installation, Operation, and Maintenance (IOM)
Manual prior to installation and operation of this equipment is required for a full
understanding of its application and performance prior to use.*
If you have any questions, please call 1-800-776-7267 in the USA or 1-281-491-2331.
Notes, Cautions, and Warnings
Notes emphasize information or set it off from the surrounding text.
Caution messages appear before procedures that, if not observed, could
result in damage to equipment.
Warnings are alerts to a specific procedure or practice that, if not
followed correctly, could cause personal injury.
*The following procedures have been written for use with standard Welker parts and equipment.
Assemblies that have been modified may have additional requirements and specifications that are not listed
in this manual.*
1.2 DESCRIPTION OF PRODUCT
The Welker Adjustable Probe is designed for use in systems where it is desirable to insert
and retract the probe while the pipeline remains pressurized. The preferred location for
installation of the probe is in a straight Section of inlet piping in that the product is well
mixed, before the flowing stream is subjected to turns and impingements that can result
in turbulent flow.

SPECIFICATIONS
IOM-104 Page 4 of 10
APP-5
Rev: B
Last updated: 9/8/2009
1.3 SPECIFICATIONS
The specifications listed in this Section are generalized for this equipment. Welker can
modify the equipment according to your company’s needs. However, please note that
*the specifications may vary depending on the customization of your product.
Table 1
General
Products Gases/Liquids
Materials of Construction 316 Stainless Steel, Viton®and PTFE (others
available)
Insertion Length Up to 24" (609 mm)
Viscosity Range 0.009 cp to 2,000 cp @ 68° F (20°C)
Pipeline Connection 1/2", 3/4", or 1" NPT Standard
Sample Outlet Connection 1/4" NPT Standard
Maximum Insertion Pressure 500 for 3/8" tubing
Maximum Allowable Pressure 1,440 psi @ -20° F to 100° F (99 bar @ -29° C to
38° C)
Maximum Allowable
Temperature 400° F @ 1,030 psi (204° C @ 71 bar)

SPECIFICATIONS
IOM-104 Page 5 of 10
APP-5
Rev: B
Last updated: 9/8/2009
1.4 DIAGRAM

INSTALLATION &OPERATIONS
IOM-104 Page 6 of 10
APP-5
Rev: B
Last updated: 9/8/2009
2. INSTALLATION &OPERATION INSTRUCTIONS
2.1 GENERAL
After unpacking the unit, check it for compliance and for any damages that may have
occurred during shipment.
Claims for damages caused during shipping must be initiated by the receiver and
directed to the shipping carrier. Welker is not responsible for any damages caused from
mishandling by the shipping company.
When sealing fittings with PTFE tape, refer to the proper sealing instructions for the tape
used.
Recommended Tools
It would be advisable to have the following tools available
for installation of the unit; however, tools used will vary
depending on model.
•Measuring tape
•6" adjustable wrench
•10" adjustable wrench
•Permanent marker
•Tubing cutters
•Fine-grit sandpaper
•Small file
2.2 PREPARING THE PROBE FOR INSTALLATION
1. Determining the insertion length
Before installing the unit, determine the length the insertion shaft will need to travel
inside the pipeline. Measure from the top of the pipeline’s isolation valve to the center
one-third of the pipeline.
2. Setting the insertion length on the shaft
Once the insertion length of the shaft is determined, this length should be measured on
the shaft itself (Refer to Figure 2 following steps 2a-2e on the next page.)

INSTALLATION &OPERATIONS
IOM-104 Page 7 of 10
APP-5
Rev: B
Last updated: 9/8/2009
a. Fully retract the probe from the tubing union assembly and base.
b. Begin at the top of the tubing union assembly and measure up on the
shaft to the desired length.
c. Mark this point on the shaft, as this is where you will lock the assembly.
d. Move the tubing union assembly up on the shaft to the marked point.
e. Use an adjustable wrench to tighten the tubing nut onto the tubing union.
The ferrule will clasp onto the shaft, locking the assembly in place.
f. Loosen the nut and slide the base down until it stops.
Do not tighten the tube union to the base. The TFE ferrule is a back up to the
primary seal (O-ring), and should only be tightened if the primary seal or o-ring
leaks.
3. Cutting off excess tubing from the shaft
a. Measure up on the shaft approximately two inches from where the tubing
union assembly is now positioned. Mark this point on the shaft.
b. Using tubing cutters, remove the excess tubing from the two-inch mark on
the shaft.
c. File and smooth the cut edge of the shaft.
d. Thread valve “A” onto the shaft, making sure the valve is closed.
2.3 INSTALLING THE PROBE
1. Make sure valves “A” and “B” on the unit are closed.
2. Retract the shaft from the base and tubing union assembly.
3. With the pipeline isolation valve closed, install the unit onto the pipeline isolation
valve.
4. Slowly open the pipeline isolation valve, and push the shaft down into the pipeline.
Figure 1

INSTALLATION &OPERATIONS
IOM-104 Page 8 of 10
APP-5
Rev: B
Last updated: 9/8/2009
As pipeline pressure will be pushing up on the shaft, you will have to firmly push down on
the unit in order to insert the shaft. Maximum Allowable Pressure is 500 psi at -20° F
to 100° F.
5. Thread the tubing union assembly tightly onto the base to hold the shaft in the pipeline.
Do not let go of the unit until the tubing assembly is securely tightened.
6. Connect the product out Valve A (P1) to the sample inlet on the sampler to the sampler
or a sampling system.
7. Connect the return to pipeline Valve B (P2) to the sample outlet on the sampler to the
sampler or a sampling system.
8. Open Valves "A" & "B".
2.4 HELPFUL HINTS
1. Avoid rough handling of the unit and bending of the shaft. The shaft has a polished
surface that travels through seals.
2. Operate the unit slowly and smoothly while inserting and retracting.
3. The entire unit should be treated with care
2.5 RETRACTING THE PROBE
Pipeline pressure will be forcing the shaft out of the pipeline. Failure to push down
on the unit while loosening the assembly could cause a rapid retraction of the
probe from pipeline, possibly resulting in injury. Maximum Allowable Pipeline
Pressure is 500 psi at -20° F to 100° F. Do not remove at pressures higher than
maximum.
1. Close Valves “A” and “B”.
2. Disconnect the sampler or sampling system.
3. Firmly push down on the unit while slowly loosening the tubing assembly from the
base.
4. Make sure the probe has completely retracted from the pipeline by pulling up on the
shaft until it stops.
The most common cause for repairs to an adjustable probe is due to the pipeline isolation
valve closing on the probe while the probe is still inserted into the pipeline. Please avoid
this practice.
5. Close the pipeline isolation valve.
6. Loosen and remove the unit from the pipeline isolation valve.
7. The unit is now ready for maintenance or to be moved to another location.

MAINTENANCE
IOM-104 Page 9 of 10
APP-5
Rev: B
Last updated: 9/8/2009
3. MAINTENANCE
3.1 GENERAL
Maintenance should not be necessary unless a leak occurs due to improper or excessive
use of the unit. Prior to maintenance or disassembly of the unit, it is advisable to have a
repair kit handy for the system in case of unexpected wear or faulty seals.
Recommended Tools
It would be advisable to have the following tools available for installation of the unit.
However, tools used will vary depending on cylinder model and connectors used.
•6" adjustable wrench
•10" adjustable wrench
•10" channel lock pliers
•Tubing cutters
•1/4" stainless steel ferrule set
•fine-grit sandpaper
•small file
Refer to diagram on page 5.
1. Loosen and remove Valve “B” from the base.
2. Loosen and remove Valve “A” from the top of the shaft.
3. Loosen the tubing nut from the shaft.
4. Cut and remove the shaft tubing from the unit’s components. The tubing can be
discarded.
5. Remove the tubing union assembly and base from the shaft tubing.
6. Replace the O-ring inside the base.

13839 West Bellfort, Sugar Land, Texas 77498-1671
Phone: [phone]
Fax: [phone]
Toll Free: [phone]
Web Page: www.welkereng.com