Liquid Controls Flow Meter MA-5

Examine all fasteners for issues

Check housing and cover for flatness

Use a straight edge to determine flatness

Relieve all internal pressures and drain all liquid from the system.

Close all liquid and vapor lines between the meter and liquid source.

Refer to local authorities and relevant NFPA Codes for safety rules.

Ensure pipes are supported independently of the meter.

Check that pipes are aligned correctly to the meter.

Are all pipes supported and not hanging?

Repair pulled threads with threaded insert fasteners

Contact distributor for advice if needed

Coat threads with anti-seize when removing bolts

Coat threads with anti-seize when replacing bolts

Coat threads with anti-seize when removing castings

Coat threads with anti-seize when replacing castings

Acknowledge understanding of the warning regarding relieving internal pressure

Relieving Internal Pressure Procedure for LPG and NH₃ Meters

Close the belly valve of the supply tank

Close the valve on the vapor return line

Close the manual valve in the supply line on the inlet side of the meter

Is there a manual valve on the inlet side of the meter?

Consult the truck manufacturer for procedures to depressurize the system if no manual valve exists

Slowly open the valve/nozzle at the end of the supply line

Identify the condition of the O-rings

Do the O-rings need replacement?

Is there a potential shock problem indicated by nibbled O-rings?

Replace damaged O-rings if necessary

Describe any shock problems identified