SC Cylinder
4.
Remove the buttonhead screw and washer seal from the end of the base.
5.
Insert a hex key through the base to the spring adjuster.
6.
Allow full pipeline pressure to reach the GSS-4PM. Check for leaks and repair as necessary.
If the GSS-4PM is equipped with a standard probe, slowly open sample pump isolation valve D (
Figure 2
).
If the GSS-4PM is equipped with the optional LE-2SSKO, slowly open inlet (P₁) valve A and return (P₂) valve B (
Figure 3
).
7.
Turn the spring adjuster to adjust the spring tension until no gas bleeds through, and then turn the spring adjuster
clockwise another full turn.
When sampling into a Welker SC Single Cavity Cylinder, the inline relief must be set to approximately 100 psig above pipeline
pressure.
To increase spring tension and raise the relief set point, turn the spring adjuster clockwise.
To decrease spring tension and lower the relief set point, turn the spring adjuster counterclockwise.
Each full clockwise turn of the spring adjuster increases spring tension approximately 100 psig.
8.
Replace the washer seal, and then return the buttonhead screw to the base.
9.
Verify that the sample outlet pressure gauge reads the pressure appropriate for the sample cylinder (
Figure 2
or
Figure
3
). This reading indicates that the inline relief is holding and that sample cannot flow back to the pipeline.
When sampling into a Welker SC Single Cavity Cylinder, the pressure gauge should read 0 psig at start-up.
10.
Proceed to step 22.
14
IOM-022
MODEL: GSS-4PM
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
