Whittaker C422425 User manual
NOTICE: PROPRIETARY INFORMATIONOF WHITTAKER CONTROLS,INC., A BUSINESS UNIT OF MEGGITT PLC.
THE INFORMATION CONTAINED IN THIS DOCUMENT IS DISCLOSED IN CONFIDENCE. IT IS THE PROPERTY OF
WHITTAKER CONTROLS, AND SHALL NOT BE USED, DISCLOSED TO OTHERS, OR REPRODUCED IN WHOLE
OR IN PART WITHOUT THE EXPRESS WRITTEN CONSENT OF WHITTAKER CONTROLS. IF CONSENT IS GIVEN
THIS NOTICE SHALL APPEAR IN ANY SUCH REPRODUCTION.
REVISION 1.1 – 10/15/2004
Maintenance Manual
GAS VENT VALVE
1/2-INCH, SOLENOID OPERATED, 24 VDC
PART NUMBERS:
C422425
C422685
C422695
C422705
C423095
C423155
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page A
LIST OF EFFECTIVE PAGES
On a revised page, the portion of text or illustrations affected by the change is indicated by a vertical line
in the outer margin of thepage. When a revision is issued, the entire document is reissued with the current
revision number and date shown on all pages. For major revisions, the basic number is incremented. For
minor revisions, the number following the decimal is incremented. Dates of issue for original and subse-
quent revisions are as follows:
Revision 1.0 ...........................................10/01/2003
Revision 1.1 ...........................................10/15/2004
The total number of pages in this technical document is 18 consisting of the following:
Title, A, 1 – 16
TABLE OF CONTENTS
SUBJECT PAGE
Introduction .......................................................................4
Description and Operation ...........................................................7
Installation ......................................................................11
Fault Isolation ....................................................................15
LIST OF ILLUSTRATIONS
FIGURE PAGE
1. 1/2-Inch Gas Vent Valve ....................................................8
2. Electrical Schematic Diagram ................................................9
3. Key Dimensions ..........................................................13
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 1
LIST OF TABLES
TABLE PAGE
1. General Characteristics/Specifications ..........................................6
2. Detailed Characteristics/Specifications ........................................10
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS!
This manual contains important instructions that should be followed during installation and maintenance
of the Gas Vent Valve (valve). The following are general safety precautions that are not related to specific
procedures and therefore do not appear elsewhere in this publication. These are recommended precau-
tions that personnel must understand and apply during many phases of maintenance.
The valve is electrically actuated. Wherever electricity is present, there is the hazard of electrocution. Like
anyotherelectro-mechanicaldevice,thevalvecanbedangerousifitisimproperlyoperatedormaintained.
Safety Alert Symbols
Safetyalert symbolsareused inthismanual toidentifypotentialorimmediatepersonalinjuryhazards. The
safety alert symbol words are explained below:
DANGERindicatesanimminentlyhazardoussituationwhich,ifnot
avoided, will result in injury or serious injury.
WARNINGindicatesapotentiallyhazardous situationwhich, ifnot
avoided, could result in injury or serious injury.
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a poten-
tially hazardous situation which, if not avoided, may result in pro-
perty damage.
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 2
WEAR PROTECTIVE CLOTHING
!Wear protective clothing (gloves, apron, etc.) approved for the materials and tools being used.
USE APPROVED SAFETY EQUIPMENT
!When cleaners are being used, approved explosion-proof lights, blowers, and other equipment must
be used. Make sure that fire fighting equipment is readily available and in working order.
GIVE CLEANERS SPECIAL CARE
!Keepcleaners inspecialpolyethylenebottlesorinsafetycansandinminimumquantities.Discard soil-
ed cleaning rags into safety cans.
Equipment Safety Information
The following safety information briefly discusses hazards peculiar to the equipment, whichare likely to be
encountered during maintenance activity.
VALVE INSTALLATION PRECAUTIONS
!Thedesignofthepipingsystemmustprovideadequatepressureandtemperatureprotectiontoprevent
exceeding the limits of the valve.
!Flanged Piping Connections
CMake sure that the valve orientation is correct and install the valve in-line with the flanges. Make
sure that the piping flanges are properly positioned and spaced. Do not force the piping in order to
fit the valve. Do not use the flange bolting to pull the piping into the proper position.
CInstall the gaskets and the bolting, and torque per ANSI or API requirements.
CRe-torque the flange closure bolts after the first exposure to elevated temperature.
!Make sure that the valve cycles and operates correctly after installation.
VALVE OPERATION PRECAUTIONS
!Do not exceed the pressure/temperature limits of the valve.
!Do not lubricate the valve. Use of lubrication or sealants may void the warranty or cause pre-mature
failure of the valve.
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 3
VALVE MAINTENANCE PRECAUTIONS
!Do not loosen any fasteners or attempt to removal the valve from the line until all pressure is isolated
and released from the system, with valve halfway closed to release the body cavity pressure.
GENERAL OPERATING LOCATION PRECAUTIONS
!This manual covers equipment for use under the following atmospheric conditions:
CAn oxygen concentration not greater then 21 percent by volume
CA nominal barometric pressure of one atmosphere
!During and after operation, all of the valve components are hot. Touching hot components can cause
painful injury.
!Use only authorized replacement parts or hardware.
!Observe proper Lock-Out/Tag-Out procedures when working on the valve and makesure that person-
nel protection equipment such as electrical grounds are installed.
!Make sure that all of the electrical wiring is properly terminated. Make sure that all of the wire terminals
are securely connected.
!Avoid hazardous voltage situations that can result from unsafe conditions such as, but not limited to
the following:
CImproper grounding
CHandling electrical leads or devices with wet hands or on wet ground
CDamaged electrical wire insulation
CImproper connection or re-connection of the power terminals.
CShort circuits to ground
OPERATION AND MAINTENANCE OF HIGH PRESSURE COMPRESSED GAS SYSTEMS
!Protect all gas lines from damage or puncture. Do not operate the valve if a gas leak is detected – this
could indicate a loose or damaged high pressure fitting.
!Do not use flammable solvents for cleaning parts.
!Check for tools, rags, or loose parts left in the area before resuming operation.
!Do not attempt to remove the valve from the system without first isolating it from the line pressure and
venting all of the trapped internal pressure.
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 4
INTRODUCTION
1. Purpose of Manual
A. This technical manual contains instructions for operation and shop maintenance of the Gas
Vent Valve (valve). This manual is intended to provide information in sufficient detail to permit
proper fault isolation, maintenance, and repair of the equipment.
B. The valve operates as a component of a fuel metering system to control delivery of natural gas
to a gas turbine engine. Refer to Table 1 for system specifications/characteristics.
2. Revision Service
This manual will be revised as necessary to show the current information.
3. Weights and Measurements
Weights and measurements in this manual are expressed in both English (U.S. customary) and
Metric (SI) units.
4. Scope of Manual
The technical manual is divided as follows:
Introduction – Describes the purpose and scope of this manual.
DescriptionandOperation–Containsaphysicaldescriptionoftheequipmenttogetherwithexplan-
ations of its operation and component functions and characteristics.
Installation – Provides information for installing, connecting, and preparing the equipment for use.
Fault Isolation – Contains procedures for finding the cause of a malfunction.
Maintenance – Provides instructions for adjustment, and replacement of defective components.
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 5
5. Symbols and Abbreviations
Symbols and abbreviations used in this technical manual are as follows:
AWG American Wire Gage
C Centigrade (Celsius)
DC Direct current
F Fahrenheit
Hz Hertz
kg Kilogram
kg/s Kilograms/second
kPa KiloPascal
LVDT Linear variable differential transformer
mm Millimeter
NPT National Pipe Thread
P/N Part Number
psi Pounds per square inch
psia Pounds per square inch, absolute
psid Pounds per square inch, differential
psig Pounds per square inch, gage
SPDT Single-pole, double-throw
VDC Volts direct current
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 6
Table 1. General Characteristics/Specifications
Application .......................................Gas Turbine Engine Fuel Gas Systems
Service Fluid .................... Natural Gas, LPG, Process Gases, Air, De-mineralized Water
Electrical Power ........................................ 24VDC Nominal (20 to 28 VDC)
Temperatures
Ambient ............................................. –40 to 212°F (–40 to 100°C)
Operating ............................................ –40 to 400°F (–40 to 204°C)
DESCRIPTION WHITTAKER
PART NUMBER HAZARDOUS AREA RATING
Gas Vent Valve, Solenoid Operated, Normally
Open, 24 VDC, 1500 psig, 1/2-14 NPT Ports
(with Closed Position Indicating Switch)
C422425 Canada: Certified Explosion Proof,
Ex d IIB, Temp Code T3, Tamb –40
to 100°C. Certified to CAN CSA
E60079-0 and CAN CSA
E60079-1.
United States: Class 1, Division 1,
Groups C and D, T3 Ambient
Temperature Range –40 to 100°C
(certified to UL-1203).
Atex: 0359 II 2 G EEx
d IIB, Temp Code T3, Tamb –40 to
100°C.
Gas Vent Valve, Solenoid Operated, Normally
Open, 24 VDC, 1500 psig, 1/2-14 NPT Ports C422685
Gas Vent Valve, Solenoid Operated, Normally
Closed, 24 VDC, 1500 psig, 1/2-14 NPT Ports
(with Closed Position Indicating Switch)
C422695
C423095
C423155
Gas Vent Valve, Solenoid Operated, Normally
Closed, 24 VDC, 1500 psig, 1/2-14 NPT Ports C422705
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 7
DESCRIPTION AND OPERATION
1. Description and Operation (See Figure 1)
A. Part Numbers C422425 and C422685
The Gas Vent Valve is a solenoid operated poppet shutoff valve. The valve is normally spring-
loaded to its open position. When the solenoid is energized, the solenoid plunger overcomes
the spring force to close the valve. Refer to Figure 2 for the electrical schematic diagram. Refer
to Table 2 for the characteristics and specifications.
B. Part Numbers C422695, C422705, C423095 and C423155
The Gas Vent Valve is a solenoid operated poppet shutoff valve. The valve is normally spring-
loaded to its closed position. When the solenoid is energized, the solenoid plunger overcomes
the spring force to open the valve. Refer to Figure 2 for the electrical schematic diagram. Refer
to Table 2 for the characteristics and specifications.
C. Closed Position Indicating Switch Circuit (Part Number C422425, C422695, C423095 and
C423155 Only)
The valve is equipped with a position indicating switch that is actuated by the solenoid plunger.
When the valve is in its closed position, the switch circuit is closed.
2. Detailed Specifications (Refer to Table 2)
WHITTAKER CONTROLS, INC.
A MEGGITT PLC COMPANY
MAINTENANCE MANUAL
GAS VENT VALVE
C422425 • C422685 • C422695 • C422705 • C423095 • C423155
INDUSTRIAL PRODUCTS GROUP Revision 1.1 10/15/2004 Page 8
Figure 1. 1/2-Inch Gas Vent Valve
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