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
! Keep cleaners in special polyethylene bottles or in safety cans and in minimum quantities. Discard soil-
ed cleaning rags into safety cans.
Equipment Safety Information
The following safety information briefly discusses hazards peculiar to the equipment, which are likely to be
encountered during maintenance activity.
VALVE INSTALLATION PRECAUTIONS
! The design of the piping system must provide adequate pressure and temperature protection to prevent
exceeding the limits of the valve.
! Flanged Piping Connections
C Make 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.
C Install the gaskets and the bolting, and torque per ANSI or API requirements.
C Re-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.
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