Glass Tube Level Gauge Installation / Operation / Maintenance Guide

Installation Instructions

Only Qualified Personnel Who Are Familiar With Gauge Glass Valves And Their Operation Should Undertake Installation Of This Product. Failure To Properly Install Could Result In Serious Personal Injury And Property Damage.

1. Prior To Actual Installation, Turn Handwheel On Upper And Lower Valve On Gauge Clockwise Until Stem Closes Against Seat.
2. Make Sure That The Face Of The Process Connections Are Aligned Vertically With Each Other.
3. Adjust the flanges of theLevel Gauge to the flanges of the tank connection.
4. Put the gaskets onto the flange face and insert the bolts/screws.
5. Tighten the screws/nuts firmly.
6. Re-Check Vessel Connections As Well Vent/Drain Connections On Each End Of Gauge To Ensure That They Are Pressure Tight.
7. Turn Valve Handwheels Counterclockwise Very Slowly To Avoid Excessive Thermal Shock And Mechanical Stress On Tubular Gauge Glass Sight Tube Contained Inside Gauge Frame.
8. Allow Gauge Temperature And Pressure To Slowly Equalize With Vessel.

Note: Failure To Slowly Bring Gauge Into Service Will Cause Rapid Pressurization Of Sight Tube Which Could Result In Serious Personal Injury And Property Damage.

9. Inspect Gauge To Insure That There Are No Leaks Prior To Proceeding With Installation.
10. Open Valves Completely After Temperature And Pressure Have Equalized To Permit Ball Checks In Valve Bodies To Properly Seat In The Event Of Possible Glass Breakage. (Note: In Some Circumstances Where Liquid Being Gauged Tends To Surge In A Rapid Manner, Ball Checks Can Seat And Give A False Level Reading).

Maintenance Instructions

1. During System Shutdown, Gauge Valves Are To Be Left Open To Allow Gauge To Lose Pressure And Cool To Ambient Temperature With Vessel.
2. Should Gauge Need Maintenance While Vessel Is Still In Service, Valves On Each End Of Gauge Are To Be Closed Completely To Allow Gauge To Cool To Ambient Temperature If Necessary. Liquid Can Then Be Carefully Drained By Using Connection Port On Lower End Of Gauge.

Note: Do Not Proceed With Any Maintenance Unless Gauge Has Been Relieved Of All Pressure Or Vacuum And Has Been Allowed To Reach Ambient Temperature. Gauge Should Also Be Flushed Out To Remove Any Hazardous Liquids Before Handling If Possible.