Vindum CV Series User manual

1
CV-Series
High-Pressure Valves
USER GUIDE
369 Syringa Ridge
Sandpoint, ID 83864
281.782.8312
www.vindum.com
[e-mail]
V:1.2 (3-07-17)

2
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Copyright 2005-2017
Vindum Engineering, Inc. All rights reserved. Reproducon or use of contents in any manner is prohibited
without express permission from Vindum Engineering. While every precauon has been taken in the prepara-
on of this manual, the publisher assumes no responsibility for errors or omissions. Neither is any liability
assumed for damages resulng from use of the informaon contained herein.

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Table of Contents
Chapter 1 General Overview..................................................................................................1
1.1 Conguraon ............................................................................................................................ 1
1.2 Main O-Ring Seal Material ........................................................................................................ 1
1.3 Pressure Rang ......................................................................................................................... 1
1.4 Solenoid Pilot Valve .................................................................................................................. 2
1.5 Valve Temperature Rang ........................................................................................................ 2
1.6 Weed Parts ............................................................................................................................. 2
1.7 Everything you need to operate your CV Valve........................................................................ 2
1.8 Addional Informaon.............................................................................................................. 3
1.8.1 CV Valve Models .................................................................................................. 3
1.8.2 CV Valve Size ....................................................................................................... 4
Chapter 2 Understanding Your Valve...................................................................................5
2.1 Principles of Operaon for the 2-Way Valve ............................................................................ 5
2.1.1 Possible Conguraons of the 2-Way Valve.................................................................. 5
2.1.2 Direcon of Flow............................................................................................................ 5
2.2 Principles of Operaon for the 3-Way Valve ............................................................................ 5
2.2.1 Possible Conguraons of the 3-Way Valve.................................................................. 5
2.2.1.1 Open / Closed Posion (A1 / B2) ...................................................................... 6
2.2.1.2 Closed / Open Posion (B1 / A2) ...................................................................... 6
2.2.1.3 Open / Open Posion (A1 / A2) ........................................................................ 6
2.2.1.4 Closed / Closed Posion (B1 / B2) .................................................................... 6
Chapter 3 Solenoid Pilot Valves & Manifolds....................................................................7
3.1 Air Supply Requirements .......................................................................................................... 7
3.1.1 Air Input and Output............................................................................................ 7
3.2 Electrical Power......................................................................................................................... 8
3.3.1 Power Failure Opons.......................................................................................... 8
3.3 High Temperature CV Valves .................................................................................................... 9
Chapter 4 CV-200 Series & CV-400 Series Valve Maintenance....................................11

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4.1 Tools You Will Need ................................................................................................................ 11
4.2 Disassembling the 2-Way Valve.............................................................................................. 11
4.3 Disassembling the Piston Assembly........................................................................................ 12
4.4 Disassembling the Sleeve Assembly ....................................................................................... 12
4.5 Inspecng the Sleeve and Cone.............................................................................................. 13
4.6 Reassembling the Sleeve Assembly ........................................................................................ 13
4.7 Reassembling the Piston Assembly......................................................................................... 14
4.8 Reassembling the 2-Way Valve............................................................................................... 14
Chapter 5 CV-300 Series & CV-500 Series Valve Maintenance ..................................17
5.1 Dierences Between the CV 2-Way and 3-Way Valves.......................................................... 17
5.2 Disassembling the 3-Way Valve.............................................................................................. 17
5.3 Disassembling the Piston Assembly........................................................................................ 18
5.4 Disassembling the Sleeve Assembly ....................................................................................... 18
5.5 Reassembling the Sleeve Assembly ........................................................................................ 18
5.6 Reassembling the Piston Assembly......................................................................................... 18
5.7 Reassembling the 3-Way Valve............................................................................................... 18
Chapter 6 Maintenance & Troubleshoong ....................................................................21
6.1 Air Supply Problems................................................................................................................ 21
6.1.1 Solenoid Pilot Valve Visual Check ................................................................................ 21
6.1.1.1 If the Light Goes On and O for a Dierent Solenoid Pilot Valve................... 21
6.1.1.2 If No Light Goes On or O............................................................................... 22
6.1.2 Solenoid Pilot Valve Audio Check ................................................................................ 22
6.1.2.1 No “Air Escaping” Sound When CV Valves Are Opened & Closed.................. 22
6.1.2.2 The Air Supply is Not Dry ................................................................................ 22
6.1.2.3 The Air Pressure is Too Low............................................................................ 23
6.1.2.4 The Air Pressure is Too High ........................................................................... 23
6.1.2.5 Constant “Air Escaping” Sound....................................................................... 23
6.1.2.6 Compressed Air Supply Runs Out Quickly ...................................................... 24
6.2 Fluid Supply Problems............................................................................................................. 24
6.2.1 Fluid Leaks from the CV Valve Bleed Port.................................................................... 24
6.2.2 Fluid Leaks Across a “Closed” Valve............................................................................. 25
6.2.3 Fluid Leaks Into Air Tubes ............................................................................................ 25
6.2.4 Fluid is Not Traveling Properly..................................................................................... 25
Appendix 1: Removal & Replacement of the Cone ........................................................27

Appendix 2: CV-210 & CV-310 Valve Components .........................................................30
Appendix 3: CV-405 & CV-505 Valve Components .........................................................31
Appendix 4: CV-410 & CV-510 Valve Components .........................................................32
Appendix 5: CV-420 & CV-520 Valve Components .........................................................33
Appendix 6: Commercially Available Parts .......................................................................34
A.6.1 Fluid Fings..........................................................................................................................34
A.6.2 Pilot Valves / Air Manifold ........................................................................................................35
A.6.3 Lubricants and Adhesives .........................................................................................................35
Appendix 7: O-Ring Compability Chart............................................................................36
Appendix 8: Quote Request / Order Form........................................................................37
Index.............................................................................................................................................38

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1
Chapter 1
1. General Overview
The Vindum Engineering CV High Pressure Valves are available in two conguraons; either as a 2-posion,
on/o valve, or a 3-way, 4-posion valve. The CV Valves are air-actuated, constant-volume valves with a
switching me of less than .1 second. They are typically used as switching devices in high-pressure uid ow
systems. The valves are designed so that no uid is displaced when they are opened or closed. This allows
them to be useful in systems requiring constant volumes or constant pressures during the switching cycle.
All weed parts on CV Valves ulize either 316 stainless steel, which is corrosion resistant, or Hastelloy© C-
276, which is used for brine applicaons or highly corrosive uids. Our standard valves have a temperature
rang of 180°F (80°C). Valves with our high temperature opon have a temperature rang of 320°F (160°C).
1.1 Conguraon
Each CV Valve is customized to the needs of the user by ulizing the following opons:
The CV Valve can be built as either:
•2-Way, on/o valve, which uses a single solenoid pilot valve
•3-Way, 4 posion valve which uses 2 solenoid pilot valves. The 3-way, 4-posion valve contains two inde-
pendently operated valves that are connected with a center ng (tee).
Solenoids to control the valve are sold separately. Solenoids can be ordered singly or in manifold with up to
twelve staons.
1.2 Main O-Ring Seal Material
The following materials are available for the weed O-ring. The weed O-ring material needs to agree with
the uid used. See Appendix 7 or online sources (such as the Parker O-ring handbook) for chemical combabil-
ity
•Aas
•Buna
•Teon™
•UHMW
•Viton
•Other materials on request
1.3 Pressure Rang
The CV-Valves can have a pressure rang of either 5,000; 10,000; or 20,000 psi.

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1.4 Solenoid Pilot Valve
The solenoid pilot valves for the 85 to 115 psi air supply can be operated by either:
•12 Vdc
•24 Vdc
Note: The standard voltage is 12 Vdc, 24 Vdc is available on request.
1.5 Valve Temperature Rang
•Standard ambient temperature CV-Valves operate up to 180°F (80°C), and have push-in type air line
ngs.
•Oponal high temperature CV-Valves operate up to 320°F (160°C), and have compression type air line
ngs
Note: air line ngs are the only dierence between ambient and high temperature valves.
1.6 Weed Parts
There are two opons of materials for the valve’s weed parts, or the parts of the valve that will come in con-
tact with the uid:
•316 Stainless Steel for inert materials, or
•Hastelloy C-276 for corrosive materials or brine
1.7 Everything you need to operate your CV Valve
•Valve
•High Pressure Fings
•Pneumac ngs
Sold Separately
•Solenoid Pilot Valves
•1/8” air tubing

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1.8 Addional Informaon
1.8.1 CV Valve Models
Table 1-1
CV VALVE MODELS
Valve
Model
Maximum
Pressure
Rang [PSI (Bar)]
Internal
Volume (cc)
Approximate
Flow
Coefficient (Cv)
2-Way On-O Valves
CV-210 10,000 (700) 0.11 .06
CV-405 5,000 (350) 0.44 .24
CV-410 10,000 (700) 0,44 .12
CV-420 20,000 (1400) 0.22 .03
3-Way 4 Posion Valves
CV-310 10,000 (700) 0.31 .06
CV-505 5,000 (350) 1.08 .24
CV-510 10,000 (700) 0.74 .12
CV-520 20,000 (1400) 0.62 .03

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1.8.2 CV Valve Sizes
Valve Size
Valve
Model
Fings
(Autoclave Engineers)
Valve
Dimensions
2-Way On-O Valves
CV-210 W125 - 1/8” Speedbite
2” diameter x 1.695”
(5.0 cm x 4.3 cm)
CV-405 SW250 - 1/4” Speedbite 2.25” diameter x 1.95” (5.7 cm x 4.9 cm)
CV-410 SW250 - 1/4” Speedbite
2.25” diameter x 1.95”
(5.7 cm x 4.9 cm)
CV-420 F250C - 1/4” High Pressure
2.25” diameter x 1.95”
(5.7 cm x 4.9 cm)
3-Way 4 Posion Valves
CV-310 W125 - 1/8” Speedbite
2” diameter x 3.645”
(5.0 cm x 9.2 cm)
CV-505 SW250 - 1/4” Speedbite
2.25” diameter x 4.435”
(57 cm x 11.3 cm)
CV-510 SW250 - 1/4” Speedbite
2.25” diameter x 4.435”
(57 cm x 11.3 cm)
CV-520 F250C - 1/4” High Pressure
2.25” diameter x 4.435”
(57 cm x 11.3 cm)

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Chapter 2
2. UNDERSTANDING YOUR VALVE
2.1 Principles of Operaon for the 2-Way Valve
Each CV 2-Way Valve contains two air supply tubes, A and B, which
are connected to one solenoid-operated pilot valve. Pressurized air
passes from the solenoid pilot valve through one of the air supply
tubes into the 2-Way valve’s piston assembly. Within the piston as-
sembly is a cone that serves as a “gate”, which either opens and al-
lows uid to ow or closes and stops uid from owing.
• Pressurized air passing through air supply tube A moves an inter-
nal cone away from the A air supply port. Because the cone is
pointed towards the A port, this causes the valve to open and u-
id to ow. This is considered the “open” posion.
• Pressurized air passing through air supply tube B moves an inter-
nal cone towards the A air supply port. This causes the valve to
close and uid to stop. This is considered the “closed” posion.
• The C port is a pressure bleed port. It is designed to provide pres-
sure relief in case uid leaks out of the sleeve assembly. If uid is
leaking from the C-Port, there is a problem with your valve. See
secon 6.2.1.
2.1.1 Possible Conguraons of the 2-Way Valve
The 2-Way CV Valve is an on/o valve. It can be congured in two ways, either normally open or normally
closed. In case of a power failure, it can be set to open or to close. See secon 3.2.1: Power Failure Opons
for informaon on valve conguraons.
2.1.2 Direcon of Flow
The uid can ow through the valve in either direcon. Figure 2.1 shows the uid coming in from the le
side.
2.2 Principles of Operaon for the 3-Way Valve
The CV 3-Way Valve contains two piston assemblies, which are connected by a center ng (tee), and four
air supply tubes. Two air supply tubes run between each piston assembly and solenoid pilot valve. Two sole-
noid pilot valves are then aached to an air manifold.
High Pressure
Air
Figure 2.1
Fluid
Path
CV-210 Closed Valve
CV-210 Open Valve

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2.2.1 Possible Conguraons of the 3-Way Valve
Because the three-way CV Valve contains the equivalent
of two 2-Way valves, it can be used as two independently
operated on-o valves, or as a single 3-way, 4-posion
switching valve. The 3-way valve can be operated in the
following four posions.
2.2.1.1 Open/Closed Posion (A1 / B2) Fig. 2.2
• Air ows into air-inlet port A1, causing the cone inside
of valve 1’s piston assembly to open.
• Air ows into air-inlet port B2 causing the cone in-
side of valve 2’s piston assembly to close.
2.2.1.2 Closed/Open Posion (B1 / A2) Fig. 2.3
• Air ows into air-inlet port B1 causing the cone in-
side of valve 1’s piston assembly to close.
• Air ows into air-inlet port A2 causing the cone in-
side of valve 2’s piston assembly to open.
2.2.1.3 Open/Open Posion (A1 / A2) Fig. 2.4
• Air ows into air-inlet port A1 causing the cone inside
of valve 1’s piston assembly to open.
• Air ows into air-inlet port A2 causing the cone inside
of valve 2’s piston assembly to open.
2.2.1.4 Closed / Closed Posion (B1 / B2)
• Air ows into air inlet port B1 causing the cone inside
of valve 1’s piston assembly to close.
• Air ows into air inlet port B2 causing the cone inside
of valve 2’s piston assembly to close.
Figure 2.2 Open/Closed Valve
High pressure
air
Fluid Path
A1 C1 B1 B2 C2 A2
Valve 1 Valve 2
Figure 2.3 Closed/Open Valve
Fluid PathHigh pressure
air
A1 C1 B1 B2 C2 A2
Valve 1 Valve 2
A1 C1 B1 B2 C2 A2
Valve 1 Valve 2
High pressure
air
Fluid Path
Figure 2.4 Open/Open Valve
Figure 2.5 Closed/Closed Valve
Fluid Path
A1 C1 B1 B2 C2 A2
High pressure
air
Valve 1 Valve 2

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Chapter 3
3. Solenoid Pilot Valves and Manifolds
The CV-Series Valves are completely air actuated. Air is taken into the air inlet and distributed to the solenoid
pilot manifolds. The solenoid pilots then distribute and control the air ow to the valves.
3.1 Air Supply Requirements
Because the CV Valves are completely air-actuated, 85 to 115 PSI of ltered air must be connected to the so-
lenoid pilot valves at all mes. Failure to maintain sucient air pressure at the appropriate port on the CV
Valves can result in valve malfuncon, leakage and subsequent loss of control. Following are the air supply
requirements for all CV Valves.
• The air must be clean.
• The air must be dry because moisture in the air supply will cause the solenoid pilot valves to rust and mal-
funcon.
• The air must be oil-free.
• The air must be 85 - 115 PSI (5.95 to 8.05 bar). If the air pressure is outside this range, the solenoid pilot
valves may stop working.
A standard, ltered laboratory air supply from an air compressor is adequate if it meets the above criteria.
The air compressor should be equipped with a dryer because water vapor in the air lines will cause the pilot
valves to rust and malfuncon. Tanks of compressed air should not be used as a pressurized air source.
3.1.1Air Input and Output
CV Valves are air-actuated. Incoming air must be connected at the solenoid pilot valves’ air inlet port, as
shown in Figure 3-1. The air inlet at the boom of a single solenoid (marked with a “P”) has a 1/8” quick-
disconnect ng. This ng should be connected to a pressurized air source (regulated at 85 - 115 PSI) with
a 1/8” air line. Solenoids are also available in groups connected to a manifold for a common air supply, as
shown in Figure 3-2. The manifold air intake uses a 1/4” airline connected to a quick-disconnect ng.
Figure 3-2: Solenoids
A B
P (Air Inlet)
Figure 3-1: Solenoid Pilot Valve

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The air inlet ngs on the CV Valves are plasc “quick disconnects”, the same as the outlet ngs on the
solenoid pilot valves. Connect the solenoid pilot valves to the CV Valve using 1/8” nylon or Teon™ tubing
(Teon™ tubing is used for high temperature applicaons).
NOTE: Before any of the air lines connecng the solenoid pilot valves to the CV Valves are disconnected, for
any reason, some type of numbered or color-coded tags should be placed on each air line, each solenoid pilot
valve ng, and each CV Valve ng to ensure the correct connecons are made during reassembly.
3.2 Electrical Power
The solenoid pilot valves require electrical power to re-direct air pressure from one valve port to another. If
electrical power is lost, the solenoid pilot valves posion themselves to their default; non-energized posion
and valve control is lost. When the solenoid pilot valve loses power, the “B” port of the soliniod valve be-
comes pressurized and the “A” port has no pressure in it. In gure 3-3 the “B” port of the solenoid pilot valve
becomes pressured and causes the valve to close. For this reason, electrical failure should be taken into con-
sideraon and the lines should be connected so that if a power failure does occur, a dangerous situaon is
not created.
3.2.1 Power Failure Opons
In case of electrical failure, the valves can be congured to either default to a closed or an open posion. To
set up a normally closed conguraon, the “B” ports of the solenoid valve and CV Valve should be connected
together, and the “A” ports should be connected together, as shown in gure 3-3. For a normally open con-
guraon, the “B” port of the solenoid valve should be plugged into the “A” port of the CV Valve and vice
versa, as shown in gure 3-4.
Figure 3-3 Normally
Closed CV-210 Valve

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In the case of the three way CV Valves, the Valves can be set to have both valves open or closed, or it can be
set to have one valve remain open while the other closes. Although this conguraon is not shown, set up
the valve in the normally closed conguraon, then swap the connecons on the valve you wish to be nor-
mally open.
• If normally-closed operaon is desired for a CV-310 Valve, connect the solenoid pilot valves to the CV-310
Valve as shown in Figure 3-5.
• If normally-open operaon is desired for a CV-310 Valve, connect the solenoid pilot valves to the CV-310
Valve as shown in Figure 3-6.
3.3 High Temperature CV Valves
If you are connecng a high temperature CV Valve, the following two changes should be made when in-
stalling the air lines:
• The 1/8” tubing used for the air connecon between the solenoid pilot valve and the CV Valve must be
made of Teon™ instead of nylon
• The inlet air line ngs on the CV Valve will be swage-type ngs with metal ferrules. The tubing is slid
through the back side of the threaded cap. The metal ferrule is then slid onto the end of the air line, and
the threaded cap is rmly ghtened onto the ng, compressing the ferrule onto the air line.
If using CV Valves in an applicaon where they are placed in an oven, the solenoid pilot valves must be placed
outside of the oven, and the Teon™ air lines connecng them to the CV Valves should be as short as possi-
ble. Placing a solenoid pilot valve in an oven will destroy it. Do not use nylon air lines in an oven.
Figure 3-4: Normally Open CV-210 Valve
Figure 3-5: Normally Closed CV-310 Valve
A1
B1
B2
A2
A1 B1
A2 B2
A1
B1
B2
A2
Figure 3-6: Normally Open CV-310 Valve
A1 B1
A2 B2

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11
Chapter 4
4. CV-200 Series and CV-400 Series Valve Maintenance
The informaon contained in Chapter 4 explains how to disassemble, reassemble, and service all of the CV-
series on-o valves. Chapter 5 will explain how to service the 3-way valves. The piston assemblies and sleeve
assemblies in the 3-way valves are relave to those used in the on-o valves, so most of the informaon in
his chapter also pertains to 3-way valves.
Figure 4-1 is an expanded view of the CV-210 Valve. The CV-400 Series valves are similar, except that they are
slightly larger in size. Throughout this chapter, refer to Figure 4-1 for component numerical references, which
will be shown in brackets. For example, the four 8-32 x 1/2" socket-head cap screws shown as number “1”
will be referenced as “[1]”.
4.1 Tools You Will Need
You will need the following tools in order to maintain your valves.
• 1 each - 9/64 inch Allen wrench
• 1 each - 1/2 inch adjustable wrench, or vice grip with cloth as to not damage end ng
• 2 each - 3/4 inch adjustable wrenches
• 1 each – Wooden toothpick, plasc dental pick or nylon rod approximately 1/8” in diameter and tapered
at one end (No Metal)
Figure 4-1: Valve for CV-210, CV-405, or CV-410
4.2 Disassembling the 2-Way Valve
To disassemble the CV-200 Series or the CV-400 Series valve, refer to Figure 4-1, above, while following the
instrucons below.
1. Unplug valve from all tubing it is aached to.
1 4 7 8 6 7 4 2
5
End Fings
End Cap
3 Support Brack-
Socket Head Cap
Screws
O-RingPiston
Assembly Cylinder Shell

12
2. Use a 9/64” Allen wrench to remove the two 8-32 x 1/2” socket head cap screws [1] securing the valve to
the Support Bracket [3].
3. Remove the remaining six 8-32 x 1/2" socket-head cap screws [2] securing both End Caps [4] in place.
4. Grasp the valve in one hand and slide a 1/2” adjustable wrench onto one of the end ngs [5]. Use the
wrench to rotate the End Fing and End Cap in a clockwise direcon while simultaneously applying force
away from the body of the valve. When there is sucient space between the End Cap and the Cylinder
Shell [6], grasp the End Cap by hand and gently separate the two parts. As the End Cap begins to sepa-
rate from the Cylinder Shell, connue to pull “straight back”, with a minimum amount of “rocking back-
and-forth”.
NOTE: The End Fing is permanently aached to the End Cap with “Locte® 272”.
5. Inspect the polished stem on the End Fing to make sure that it is free of scratches. If it is scratched, it
needs to be polished using 2,000 grit sandpaper. Polishing the stem is easiest if done on a lathe.
6. Repeat step 3 with the other end of the End Cap/End Fing, and set both pairs of parts aside on a clean
work surface.
7. Gently slide the Piston Assembly [8] out of the Cylinder Shell [6], and set the Cylinder Shell aside.
Note: you can remove the Piston Assembly from the Cylinder Shell easily without removing both end caps
by removing one end cap and acvang the pressurized air to the air ng opposite of the open end cap.
Use as low of pressure air you can to remove the assembly, and make sure to catch the Piston Assembly
as it pops out of the Cylinder Shell.
Figure 4-2: Piston Assembly

13
4.3 Disassembling the Piston Assembly
Refer to Figure 4-2, above, for the following instrucons.
1. Slide two 3/4” adjustable wrenches over the ats on the outside of both the Piston halves [11] and [13].
2. Turn either one of the Piston halves counter-clockwise, while holding the other Piston staonary with the
wrench. Aer the two halves “break free”, connue to gently unscrew them by hand and set both pieces
aside on a clean surface with their threaded sides “up”.
3. Remove the Sleeve Assembly [12] from the Le Piston by hand.
4.4 Disassembling the Sleeve Assembly
Refer to Figures 4-3, 4-4, or 4-5 to Disassemble the Sleeve Assembly for your CV Valve.
The Figures 4-3, 4-4, 4-5 use false colors for illustrave purposes. Teon back-up rings are white, PEEK back-
up rings are tan, and the O-ring color is material dependent.
Figure 4-3: Sleeve and Cone Assembly for CV-210 and CV-310
14 15 16 15 14 17 18 19 14 15 16 15 14
PEEK back-up
ring
Teon™ back-up
Ring
Main O-Ring
Seal Sleeve Cone Spacer
20 21 22 21 20 23 24 25 20 21 22 21 20
PEEK back-up
ring Main O-Ring
Seal
Teon™ back-
up ring Sleeve
Cone Spacer
Figure 4-4: Sleeve and Cone Assembly for CV-405, CV-410, CV-505, and CV-510 Valves

14
1. Grasp the Sleeve Assembly and, using a toothpick or other appropriate tool; GENTLY slide it into the in-
side of one of the PEEK (tan) Back-Up Rings [14] on either side of the Sleeve Assembly. Only slide the End
Fing (or tool) in far enough to capture the PEEK Back-Up Ring, but not the Teon™ (white) Back-up Ring
[15] or the O-ring [16].
2. Remove the PEEK Back-Up Ring.
3. The objecve of this step is to remove the rings one at a me without damaging the inside surface of the
Sleeve. Repeat steps 1 and 2 for all remaining back-up and O-rings in the Sleeve Assembly, removing
them one at a me, for both ends of the sleeve.
Note: The sleeve assembly is slightly dierent for each CV-Valve Model. The gures below show details for
the CV-210 / CV-310 Valves, (Figure 4-3), the CV-405 / CV-410 / CV-505 and CV-510 Valves, (Figure 4-4) and
the CV-420 / CV-520 Valves, (Figure 4-5).
4.5 Inspecng the Sleeve and Cone
Now that the outside ring, O-rings, and the back-up rings are removed, wipe everything dry with a clean lint-
free cloth.
Look inside of the sleeve. Check to make sure the area inside of the sleeve where the O-ring sits is clean and
scratch-free. If there is a build-up, or anything is stuck on the sleeve barrel, remove it. You may use a solvent
and rag to clean the sleeve assembly. DO NOT use steel wool. If you see any scratches inside of the sleeve
where the O-ring sits, a new O-ring may leak. Contact Vindum Engineering to purchase a replacement sleeve.
Next inspect the cone [18, 24], which is inside of the sleeve. Check to make sure the cone has no scratches,
nicks, cracks, or broken-o areas. Make sure the cone does not appear o-center or have an asymmetrical
wear paern. Proceed only if the cone appears in good condion. If the cone displays any of the above prob-
lems, refer to Appendix 1 for informaon on replacing it. Replacement cones are available from Vindum Engi-
neering.
For CV-420 and CV-520 valves, the enre sleeve must be replaced if there is damage to the seat. To with-
stand the high pressures these valves are capable of, the valve seat is permanently embedded in the sleeve.
4.6 Reassembling the Sleeve Assembly
To reassemble the Sleeve Assembly, follow the instrucons below.
Figure 4-5: Sleeve and Cone Assembly for CV-420 and CV-520 Valves
PEEK Back-
up ring
Teon™ Back
-up Ring
Main O-ring Seal
26 27 30 26 27 28
29
Sleeve
Seat
28 27 26 26 27 27 26