Liquid Controls MA-7 - User Manual

Other manuals for Liquid Controls MA-7

Installation Manual15 pages

Questions and Answers

J
John YoungAug 17, 2025
What to do if there is no flow through Liquid Controls MA-7?
- E
  eddiebenjaminAug 17, 2025
  If your Liquid Controls Measuring Instruments meter is not flowing any product, there might be a few reasons. It could be due to a faulty or non-functioning pump, a valve that is not open or not working correctly, or the meter might be 'frozen' because of chemical 'salts' or foreign material buildup inside the metering chamber. Consider cleaning the meter and inspecting for any damage.
J
joseph39Aug 19, 2025
How to fix if Liquid Controls MA-7 Measuring Instruments meter counts down in reverse?
- E
  Emily SandovalAug 20, 2025
  If your Liquid Controls Measuring Instruments meter counts down in reverse, you should reverse the direction of flow by reversing the adjuster drive gear.
D
David PowersAug 22, 2025
Why is my Liquid Controls Measuring Instruments meter running too slowly?
- R
  Rebecca Miller MDAug 22, 2025
  If your Liquid Controls Measuring Instruments meter runs too slowly, several factors could be the cause. The valve's internal mechanism might be faulty, preventing it from fully opening. Also, the meter gears or rotors could be partially 'salted', which slows down the rotation of parts. Cleaning the meter might help. Another potential cause could be a downstream restriction or a clogged strainer basket.
P
Patrick RussellAug 26, 2025
How to stop leakage from the cover gasket on Liquid Controls MA-7?
- B
  Billy BakerAug 26, 2025
  If you observe leakage from the cover gasket of your Liquid Controls Measuring Instruments, it might be because the gasket has been damaged due to shock pressure, or the cover bolts haven't been tightened sufficiently. Replace the gasket and ensure the cover bolts are correctly tightened.
S
simpsonmaryAug 27, 2025
How to fix leakage past packing gland drive shaft housing in Liquid Controls MA-7?
- K
  Kimberly FitzgeraldAug 28, 2025
  If you notice leakage past the packing gland drive shaft housing from the internal metering chamber in your Liquid Controls Measuring Instruments, it's likely that the internal seal of the packing gland assembly is worn. Replace the packing gland and O-ring seal.
T
tmartinezAug 30, 2025
Why are teeth breaking on timing gears in Liquid Controls MA-7?
- R
  Rebekah BarajasAug 30, 2025
  If the teeth on the timing gears of your Liquid Controls Measuring Instruments are breaking, it could be due to starting or stopping the flow in the meter too rapidly, or the pump bypass not being adjusted properly.
R
Rebecca WaltersSep 2, 2025
How to fix the Liquid Controls MA-7 when it counts down in reverse?
- A
  Aaron ConwaySep 2, 2025
  If the Liquid Controls Measuring Instruments meter counts down in reverse, reverse the direction of flow by reversing the adjuster drive gear.
M
Michael FergusonSep 5, 2025
What to do if there is leakage from the cover gasket of Liquid Controls Measuring Instruments?
- J
  Justin LopezSep 5, 2025
  If you observe leakage from the cover gasket of your Liquid Controls Measuring Instruments, it's likely that the gasket has been damaged due to shock pressure or the cover bolts haven't been tightened sufficiently. Replace the gasket and ensure the cover bolts are correctly tightened.
R
Robert HallSep 8, 2025
Why is there no flow through my Liquid Controls MA-7?
- B
  Brian JohnsonSep 8, 2025
  If the Liquid Controls Measuring Instruments has no flow, this could be due to a faulty non-functioning pump or a valve that is not open or not functioning.
G
Gabrielle Maddox MDSep 12, 2025
What to do if product flows through Liquid Controls MA-7 Measuring Instruments but the register doesn't operate?
- R
  Ryan LopezSep 12, 2025
  If product flows through the Liquid Controls Measuring Instruments meter but the register does not operate, check the packing gland and gear train. A faulty register should be checked and repaired by a trained mechanic. Also, replace the packing gland, as this may be caused by starting the flow too rapidly.

Summary

Safety Procedures

BE PREPARED

Essential preparations before using the product, including training and safety measures.

SAFELY EVACUATE PIPING SYSTEM

Procedure for safely relieving internal pressures and draining liquid from the system before disassembly.

OBSERVE NATIONAL & LOCAL CODES

Requirements for wiring and peripheral equipment in hazardous locations per electrical codes.

IN THE EVENT OF A GAS FIRE

Immediate actions to take in case of a gas fire, including evacuation and notifying authorities.

IN THE EVENT OF A GAS LEAK

Installation Requirements

TAKE ALL NECESSARY SAFETY PRECAUTIONS

Emphasis on safety precautions, ventilation, temperature control, and fire management.

CONFORM TO ALL CODES

Mandate to comply with all applicable state, federal, construction, electrical, and safety codes.

PREVENT PIPE STRAIN OR STRESS

USE METER ONLY WITH SPECIFIED LIQUIDS

Operation Requirements

THE METER MUST REMAIN FULL OF PRODUCT AT ALL TIMES

Essential condition for meter operation and optimal performance.

AVOID HYDRAULIC SHOCK

How to protect the system components from damage caused by hydraulic shock.

AVOID THERMAL EXPANSION

Methods to prevent damage from thermal expansion in the system.

Meter Start Up and Operation

NEVER OPERATE THE METER OR SYSTEM WHEN PARTIALLY FILLED WITH LIQUID, OR WITH POCKETS OF COMPRESSED AIR OR VAPOR PRESENT

Warning against operating the meter with air or vapor.

DO NOT OPERATE THE METER ABOVE THE MAXIMUM PRESSURE LISTED ON THE SERIAL NUMBER PLATE

DO NOT OPERATE THE METER ABOVE THE MAXIMUM FLOWRATE LISTED ON THE SERIAL NUMBER PLATE

Reversing the Meter Registration

PRIOR TO METER DISASSEMBLY

Setting the Standard Adjuster

Maintenance

Maintenance Requirements

Servicing the Drive Components

RELIEVING INTERNAL PRESSURE

Critical procedure for safely relieving all internal pressure before disassembly.

Disassembling the Meter

Remove non-corroded rotor gears

Remove corroded rotor gears

Remove the bearing plates and rotors

Reassembling the Meter

Reassembling the bearing plates and rotors

Timing the rotor gears

Completing the Meter Reassembly

Troubleshooting

Leakage past packing gland drive shaft housing from internal metering chamber

Product flows through meter but the register does not operate

No flow through meter

Liquid Controls MA-7 Specifications

General

Model	MA-7
Category	Measuring Instruments
Type	Positive Displacement Flowmeter
Pressure Rating	150 PSI
Temperature Range	-40°F to 160°F
Materials of Construction	Aluminum, Stainless Steel
Output	Pulse Output
Power Supply	12-24 VDC