Welker CPCCP User manual

©Copyright 2009 Welker Inc.
Installation,
Operations,
and
Maintenance
Manual
Constant Pressure Crude Oil Container
Model
CPCCP
The information in this manual has been carefully checked for accuracy and is intended to be
used as a guide for the installation, operations, and maintenance of the Welker®Constant
Pressure Crude Oil Container (CPCCP). 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 to improve performance and reliability.
13839 West Bellfort
Sugar Land, TX 77498-1671
U.S.A.
Tel: [phone]
Tel: [phone]
Fax: [phone]
www.welkereng.com

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Constant Pressure Crude Oil Container (CPCCP)
Installation, Operations, and Maintenance Manual
Document: IOM-016 Last Updated:9/8/2009
Table of Contents
1 General ..................................................................................................................................... 6
1.1 Introduction......................................................................................................................... 6
1.2 Notes, Warnings, and Cautions........................................................................................... 7
1.3 Specifications ...................................................................................................................... 8
2 Installation................................................................................................................................ 9
2.1 Installing the CPCCP .......................................................................................................... 9
2.2 Installing the Motor........................................................................................................... 10
2.2.1 Air Motor .................................................................................................................. 10
2.2.2 Electric Motor ........................................................................................................... 11
2.3 Sampling tothe CPCCP..................................................................................................... 11
2.4 Retrieving a Sample.......................................................................................................... 11
2.5 Cleaning the CPCCP......................................................................................................... 13
3 Maintenance ........................................................................................................................... 11
3.1 Disassembly ...................................................................................................................... 11
3.2 Re-Assembly..................................................................................................................... 20

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List of Figures
Figure 1 CPCCP–31 Assembly....................................................................................................... 7
Figure 2 Air Supply Connected to Air Motor............................................................................... 10
Figure 3 CPCCP with Hex Nuts Removed................................................................................... 15
Figure 4 Remove the Cylinder from the Bottom Flange .............................................................. 16
Figure 5 Piston O-Rings and Backup Rings ................................................................................. 16
Figure 6 Hex Head Bolts on Air Motor ........................................................................................ 17
Figure 7 Spider Seal, 5/8" Coupling Body, End Flange, and Mechanical Seal Assembly ............ 18
Figure 8 Mechanical Seal Components ........................................................................................ 19
Figure 9 Shaft Adapter and Gear Pump Body .............................................................................. 20
Figure 10 End Cap with O-Rings and Backup Rings ................................................................... 21
Figure 11 Mechanical Seal Body.................................................................................................. 22
List of Tables
Table 1 – CPCCP Specifications .................................................................................................... 8

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1 General
1.1 Introduction
We appreciate your business and your choice of Welker products. The installation,
operations, and maintenance liability for this product becomes that of the purchaser at the
time of receipt. Reading the applicable Installation, Operations, 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.
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. After unpacking the unit, check it for
compliance or for any damage that may have occurred during shipment.
Claims for damages caused during shipment must be initiated by the receiver and
directed to the carrier. Welker is not responsible for any damages caused from
mishandling by the shipping company.
The Welker®Constant Pressure Crude Oil Container (CPCCP) is designed to allow the
contents of the cylinder to thoroughly mix, while keeping the contents under line
pressure. This process ensures a stabilized oil-water mixture for analysis.
When sealing fittings with PTFE tape, refer to the proper sealing instructions for the tape used.

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Top Cap
End Cap
Gear Pump
Sample Cylinder
Motor
Indicator Rod
Figure 1
CPCCP–31 Assembly
1.2 Notes, Warnings, and Cautions
Notes emphasize information or set it off from the surrounding text.
Caution messages appear before procedures that, if not observed, could result in loss of
data or in damage to equipment.

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Warnings alert users to a specific procedure or practice that, if not followed
correctly, could cause personal injury or even death.
1.3 Specifications
The specifications listed in this section are specialized for the Welker®Constant Pressure
Crude Oil Container (CPCCP). If the specifications do not meet company stipulations,
Welker can modify the CPCCP so that it is specific to the company's requirements.
Table 1 – CPCCP Specifications
General
Model number CPCCP
Description A self-contained CPCCP with motor mixing capabilities
Materials of construction 316 Stainless steel
Application Can be used with all products that are compatible with the materials of
construction and seal material.
Temperature range 0°F to 250°F (–17.8°C to 121°C); dependent upon pressure
Maximum working pressure 2,160 psig (149 bar)
Connections 1/4" NPT (product and inert gas connection)
11/2" NPT (air connection)

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2 Installation
2.1 Installing the CPCCP
To apply the CPCCP a pre-charge, complete the following steps:
1. Use 1/4" tubing or flex lines to connect the 1/4" NPT port on the top of the CPCCP to a
pre-charge system.
Caution To apply a pre-charge, the system connected to the CPCCP must have a bottle supply
capacity that is at least 50% greater in capacity than the pre-charge container.
2. Apply a pre-charge pressure greater than the sample line pressure to the valve on the
container (50 to 100 psig or 3.4 to 6.9 bar).
3. Slowly open the valve on the container.
4. Connect the most convenient unused 1/4" NPT port to a sump.
5. Connect the sample line to the container.

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2.2 Installing the Motor
2.2.1 Air Motor
To install the air supply system on the air motor (Figure 2), complete the following steps:
Air Supply
Pressure Balance
Tubing
Air Motor
Muffler
Figure 2
Air Supply Connected to Air Motor
1. Use the 1 ½” NPT ports on the bottom of the CPCCP to connect the air supply system
to the air motor.
Do not run the air motor without an accompanying system to supply oil to the part, as this
will cause the air motor to fail.
2. Ensure that the air supply system being used for the air motor is capable of supplying
air pressure at approximately 130 psig, and has an unrestricted air flow from the air
supply to the air motor.

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When operating the system at maximum pressure, 130 psig (9.0 bar) of air pressure is
necessary. When operating the system at lower pressures, a lower air supply pressure
may be used.
3. Connect the isolation valve from the air supply to the air motor.
2.2.2 Electric Motor
Not Applicable Operation
2.3 Sampling to the CPCCP
To sample from the pipeline, complete the following steps:
1. Refer to the company procedures for obtaining a sample.
Do not exceed 80% of gas or liquid according to indicator rod. This can cause damage to
the cylinder.
2. Stop sampling once desired amount of sample is obtained, up to 80% as shown on the
indicator rod.
2.4 Retrieving a Sample
To mix the contents of the CPCCP and draw off a homogeneous mixture of the contents:
complete the following steps:
1. Slowly open the valve to the air motor to begin mixing the sample.
2. Allow the contents of the container to mix according to API 8.2, ASTM-D4177, IP
Section VI, ISO-3171 or as directed by your company performance-based testing
specifications.
3. Place a container under the draw-off valve and open it to extract as much sample as
necessary for testing.

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Consult the company's policies and procedures for the correct amount of sample required
for testing.
4. Close the draw-off valve.
5. Repeat Steps 2 through 4 if other samples are required.
6. Open the valve connected to the sump to drain the contents of the CPCCP.

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2.5 Cleaning the CPCCP
It is necessary to use a pressurized system to properly clean and maintain the interior of
the CPCCP.
1. Fill your solvent reservoir with approximately 1 gallon of solvent.
Welker recommends that a quick-evaporating solvent be used to clean the CPCCP.
Consult your company for the correct type of quick-evaporating solvent to use. All of the
elastomers within this system are Viton, unless specified otherwise. Any solvent used for
cleaning this assembly must be compatible with the seals and the materials of
construction.
2. Pressurize the solvent reservoir to a pressure above the pre-charge pressure.
If you don’t have high-pressure solvent reservoir, it is necessary to relieve the pre-charge
pressure to below the solvent reservoir pressure.
3. Slowly open the valve to the air motor to start mixing the solvent in the CPCCP.
4. Allow the air motor to circulate the solvent for approximately 90 seconds.
5. Open the drain valve and allow the solvent to drain into the sump.
6. Close the drain valve.
7. Repeat Steps 1 through 6 until the solvent is clean when it is drained into the sump.
If a non-vaporizing solvent is used, hook an inert gas supply to sample inlet valve and
inject it into the CPCCP to dry the interior.

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3 Maintenance
3.1 Disassembly
3.1.1 CPCCP
To properly maintain and repair the CPCCP, complete the following steps:
1. Isolate the air supply and disconnect the pre-charge system from the CPCCP.
2. Turn off the sampling system and isolate the pressure from the sample pump.
3. Open the draw-off valve to the sump and release pressure within the CPCCP.
4. Ensure that the indicator rod displays 0%, and the bottom process gauge shows 0
psig.
5. Open the valve on the top cap to release the pre-charge pressure.
It is imperative that the system be de-pressurized before performing the
following steps. Performing these steps on a sample pump under pressure can
cause severe injury.
6. Use a 15/8" crescent wrench to remove the six hex nuts on the top of the end cap
(Figure 3).

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Tie Bolts
End Cap
Bottom Flange
Sample Cylinder
Figure 3
CPCCP with Hex Nuts Removed
7. Remove the end cap from CPCCP.
8. Remove the O-ring in the O-ring groove on the outer diameter (OD) of the end cap.
9. Remove the O-ring and two backup rings in the O-ring grooves on the inner diameter
(ID) of the end cap.
10. Remove the piston and cylinder from the bottom flange (Figure 4).
Bottom Flange
O-Ring
Tie Bolt

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Figure 4
Remove the Cylinder from the Bottom Flange
11. Remove the O-ring in the O-ring groove on the OD of the bottom flange.
12. Place the cylinder in a horizontal position and use a block of wood (or equivalent) to
push the piston out of the cylinder.
13. Remove the two O-rings, three backup rings, and three spiral backup rings in the
O-ring grooves on the OD of the piston (Figure 5).
Spiral Backup
Rings
Piston
O-Ring
3 Split
Backup Rings
Pist on Shaft
Figure 5
Piston O-Rings and Backup Rings
14. Inspect the shaft for scratches or wear.
15. Replace the shaft, if necessary, as referenced in the following steps:
•Use a 3/16" Allen wrench to remove the lock collar by loosening the screws
•Unscrew the piston shaft from the piston.
3.1.2 Air Motor
The air motor provided by Fennerstone should be maintained as discussed in the
manufacturer's specifications included in your order.
3.1.3 Gear Pump

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To disassemble and properly maintain the gear pump on the CPCCP, complete the
following steps:
1. Remove the pressure balance tubing from the bottom flange and pump balance port.
2. Use a 9/16" wrench to remove the hex head bolts securing the air motor in place.
3. Remove the air motor from the assembly.
4. Use a 3/16" Allen wrench to lock the set screws on the motor mount to secure into
place (Figure 6).
Hex Head Bolts
Motor Mount
Air Motor
Figure 6
Hex Head Bolts on Air Motor
The following steps should be completed after completely disassembling the CPCCP.
5. Position the assembly upside down on a workbench or the floor.
6. Remove the 5/8" spider seal from the coupling body (Figure 7).

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Mechanical
Seal
Outer
Seal
Inner
Seal
Body
End Flange
5/8” Coupling
Body
5/8” Spider
Seal
Figure 7
Spider Seal, 5/8" Coupling Body, End Flange, and Mechanical Seal Assembly
7. Use a 1/8" Allen wrench to remove the set screw from the end flange.
8. Remove the coupling body and key from the end flange (Figure 7).
9. Use a 3/16" Allen wrench to remove the 11 set screws from the end flange.
10. Remove the end flange from the mechanical seal (Figure 7).
The mechanical seal is made up of three parts: the body, the inner seal, and the outer
seal.
11. Remove the inner and outer seals from the body of the mechanical seal, exposing the
1/4" set screw (Figure 8).
The inner and outer seals within the mechanical seal are silica graphite and must be
cleaned with lint free cloths and alcohol to ensure that they are dust free before being
re-installed.

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Installation, Operations, and Maintenance Manual
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Body
Outer Seal
O-Ring
Inner Seal
O-Ring
Figure 8
Mechanical Seal Components
12. Remove the O-rings on the OD of the inner and outer seals (Figure 8).
13. Use a 3 mm Allen wrench to remove the two set screws securing the body of the
mechanical seal in place.
14. Remove the mechanical seal from the shaft adapter.
15. Use a 1/8" Allen wrench to remove the 1/4" set screw from the shaft adapter.
16. Remove the shaft adapter from the gear pump body (Figure 9).

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Installation, Operations, and Maintenance Manual
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Gear Pump Body
Shaft Adapter
Figure 9
Shaft Adapter and Gear Pump Body
17. Remove the O-ring in the O-ring groove in the ID of the shaft adapter.
18. Remove the O-ring on O-ring groove on the OD of the mechanical seal.
3.2 Re-Assembly
3.2.1 CPCCP
1. Install the alignment pin into the piston.
2. Seat the lock collar onto the piston so that it sits on the alignment pin.
3. Install the piston shaft into the piston through the lock collar.
4. Install the O-ring and three backup rings in the O-ring groove on the OD of the piston
nearest the piston shaft.
5. Install the O-ring and three spiral backup rings in the O-ring groove on the OD of the
piston farthest from the piston shaft.
6. Install the O-ring into the O-ring groove on the OD of the bottom flange.
7. Seat the piston on top of the bottom flange.