Vindum CV Series User manual

CV Series
High-Pressure Valves
Copyright 2005-2006 Vindum Engineering, Inc. All rights reserved. Reproduction or use of contents in any manner is prohibited without
express permission from Vindum Engineering. While every precaution has been taken in the preparation of this manual, the publisher assumes
no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from use of the information contained herein.

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Table of Contents
Chapter 1 General Overview.......................................................................................................1
1.1 Configuration.............................................................................................................................1
1.2 Main O-Ring Seal Material........................................................................................................1
1.3 Pressure Rating ..........................................................................................................................1
1.4 Solenoid Pilot Valve..................................................................................................................1
1.5 Valve Temperature Rating.........................................................................................................2
1.6 Wetted Parts...............................................................................................................................2
1.7 Everything is included with your CV Valve..............................................................................2
2.1 Principles of Operation for the 2-Way Valve............................................................................5
Chapter 2 Understanding Your Valve....................................................................................5
2.1.1 Possible Configurations of the 2-Way Valve..................................................................5
2.1.2 Direction of Flow............................................................................................................5
2.2 Principles of Operation for the 3-Way Valve............................................................................5
2.2.1 Possible Configurations of the 3-Way Valve..................................................................6
2.2.1.1 Open / Closed Position (A1 / B2)......................................................................6
2.2.1.2 Closed / Open Position (B1 / A2)......................................................................6
2.2.1.3 Open / Open Position (A1 / A2) ........................................................................6
2.2.1.4 Closed / Closed Position (B1 / B2)....................................................................7
Chapter 3 Solenoid Pilot Valves & Manifolds....................................................................9
3.1 Air Supply Requirements...........................................................................................................9
3.2 Electrical Power.........................................................................................................................9
3.3 Air Input and Output................................................................................................................10
3.4 High Temperature CV Valves .................................................................................................11
Chapter 4 CV-200 Series & CV-400 Series Valve Maintentance.............................13
4.1 Tools You Will Need...............................................................................................................13
4.2 Disassembling the 2-Way Valve..............................................................................................13
4.3 Disassembling the Piston Assembly........................................................................................14
4.4 Disassembling the Sleeve Assembly .......................................................................................15
4.5 Inspecting the Sleeve and Cone...............................................................................................16
4.6 Reassembling the Sleeve Assembly.........................................................................................17

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4.7 Reassembling the Piston Assembly.........................................................................................17
4.8 Reassembling the 2-Way Valve...............................................................................................18
Chapter 5 CV-300 Series & CV-500 Series Valve Maintenance.............................19
5.1 Differences Between the CV 2-Way and 3-Way Valves.........................................................19
5.2 Disassembling the 3-Way Valve..............................................................................................19
5.3 Disassembling the Piston Assembly........................................................................................20
5.4 Disassembling the Sleeve Assembly .......................................................................................20
5.5 Reassembling the Sleeve Assembly.........................................................................................20
5.6 Reassembling the Piston Assembly.........................................................................................20
5.7 Reassembling the 3-Way Valve...............................................................................................20
Chapter 6 Maintenance & Troubleshooting......................................................................23
6.1 Air Supply Problems................................................................................................................23
6.1.1 Solenoid Pilot Valve Visual Check...............................................................................23
6.1.1.1 If the Light Goes On and Off for a Different Solenoid Pilot Valve ................24
6.1.1.2 If No Light Goes On or Off .............................................................................24
6.1.2 Solenoid Pilot Valve Audio Check...............................................................................24
6.1.2.1 No “Air Escaping” Sound When CV Valves Are Opened & Closed..............24
6.1.2.2 The Air Supply is Not Dry...............................................................................25
6.1.2.3 The Air Pressure is Too Low...........................................................................25
6.1.2.4 The Air Pressure is Too High ..........................................................................25
6.1.2.5 Constant “Air Escaping” Sound.......................................................................25
6.1.2.6 Compressed Air Supply Runs Out Quickly.....................................................27
6.2 Fluid Supply Problems.............................................................................................................27
6.2.1 Fluid Leaks from the CV Valve Bleed Port..................................................................27
6.2.2 Fluid Leaks Across a “Closed” Valve ..........................................................................27
6.2.3 Fluid Leaks Into Air Tubes...........................................................................................28
6.2.4 Fluid is Not Traveling Properly....................................................................................28
Appendix 1: Removal & Replacement of the Cone.........................................................29
Appendix 2: CV-210 & CV-310 Valve Components.......................................................31
Appendix 3: CV-405 & CV-505 Valve Components.......................................................33
Appendix 4: CV-410 & CV-510 Valve Components.......................................................35

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Appendix 5: CV-420 & CV-520 Valve Components.......................................................37
Appendix 6: Commercially Available Parts........................................................................39
Appendix 7: O-Ring Compatibility Chart...........................................................................41
Appendix 8: Quote Request / Order Form..........................................................................43

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Chapter 1
1. General Overview
The Vindum Engineering CV High Pressure Valves are available in two configurations;
either as a 2-position, on/off valve, or a 3-way, 4-position valve. The CV Valves are air-
actuated, constant-volume valves with a switching time of less than .1 second. They are
typically used as switching devices in high-pressure fluid flow systems. The valves are
designed so that no fluid 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 CV Valves utilize either 316 stainless steel, which is corrosion resistant, or Hastelloy
C-276, which is used for brine applications or highly corrosive fluids. Our standard
valves have a temperature rating of 180°F (80°C). Valves with our high temperature
option have a temperature rating of 320°F (160°C).
1.1 Configuration
Each CV Valve is customized to the needs of the user by utilizing the following options:
The CV Valve can be built as either:
•2-Way, on/off valve which is supplied with a single solenoid pilot valve
•3-Way, 4 position valve which is supplied with 2 solenoid pilot valves. The 3-way, 4-
position valve contains two independently operated valves that are connected with a
tee.
1.2 Main O-Ring Seal Material
The following materials are available for the main o-ring seal. The o-ring seal material
needs to agree with the fluid used.
•Aflas
•Buna
•Teflon
•UHMW
•Viton
1.3 Pressure Rating
The CV-Valve can have a pressure rating of either 5,000; 10,000; or 20,000 psi.
1.4 Solenoid Pilot Valve
The solenoid pilot valves for the 85 to 1,000 psi air supply can be operated by either:
•12 VDC
•24 VDC

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1.5 Valve Temperature Rating
•Standard Ambient Temperature: 180°F (80°C) with push-in type air line fittings.
•Optional High Temperature: 320°F (160°C) with compression type air line fittings
1.6 Wetted Parts
There are two options of materials for the valves wetted parts. (The parts of the valve that
will come in contact with the fluid:
•316 Stainless Steel for inert materials, or
•Hastelloy C-276 for corrosive materials or brine
1.7 Everything is included with your CV Valve
•Valve
•High Pressure Fittings
•Solenoid Pilot Valves
•Pneumatic fittings
•1/8” air tubing
The following tables show additional Valve information.
CV VALVE MODELS
Valve
Model
a)
Maximum
Pressure
Rating [PSI (Bar)]
Internal
Volume (cc)
Approximate
Flow
Coefficient (CP)
2-Way On-Off 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 Position 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
Table 1-1

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Valve Size
Valve
Model Fittings (Autoclave Engineers) Valve Dimensions
2-Way On-Off Valves
CV-210 W125 - 1/8” Speedbite 2” diameter x 1.695”
(5.0 cm diameter 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 Position 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)
Table 1-2

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