SVC 7- 1
Section 7
VALVES
This section is intended to help the technician isolate problems to a specific valve component or com-
ponents. The HP 5890 Series II may be found in many different configurations, with varying component
options. This complicates the process of providing detailed troubleshooting procedures for even gener-
al problems. But, by using the general troubleshooting techniques presented here, successful results
should be achieved.
Specific part numbers are not given in this portion of the service manual. For all replacement part num-
bers, refer to the Section 7 of the IPB portion of this document.
This document is not meant to provide instruction for first time installation of any of the options dis-
cussed. The add- on sheets, which accompany the various options, exist for just this purpose, and
should be referenced when performing a first time installation.
TABLE OF CONTENTS
VALVES
SVC 7- 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION
SVC 7- 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VALCO VALVES 18900F
SVC 7- 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose Valves (GPVs)
SVC 7- 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustable Restrictors
SVC 7- 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Sample Loops
SVC 7- 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIQUID SAMPLE VALVES (LSVs)
SVC 7- 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting and Maintenance
SVC 7- 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chromatographic Symptoms
SVC 7- 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Sensitivity or Excessive Drift
SVC 7- 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Peaks in Specific Areas of the Chromatogram
SVC 7- 7
. . . . . . . . . . . . . . . .
Baseline Upsets
SVC 7- 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extraneous Peaks
SVC 7- 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locating Leaks
SVC 7- 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Check
SVC 7- 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Box Assembly Removal
SVC 7- 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Actuator Alignment
SVC 7- 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Actuation of GC- Controlled Valves
SVC 7- 17
. . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Configuration Diagrams
SVC 7- 18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com