LMI G Series User Manual (English)

Other manuals for LMI G Series

Questions and Answers:

L
Luis FloresAug 13, 2025
How to fix an LMI Water Pump when the motor won't operate?
- M
  Michael WatsonAug 13, 2025
  If the LMI Water Pump motor won't operate, there are several potential causes and solutions: * Low process liquid level: Add liquid. * Worn or dirty check valves: Clean or replace them. * Blocked discharge line: Clear the line. * Frozen liquid: Thaw the liquid throughout the pumping system. * Blown fuse: Replace the fuse. * Open thermal overload device in motor starter: Reset the device. * Broken wire: Locate and repair. * Low voltage: Investigate and correct, as wiring may be too tight. * Pump not primed: Allow suction line and pump head to fill with liquid before pumping against pressure. * Capacity adjustment set at zero: Readjust capacity.
B
Brittany SharpAug 17, 2025
Why is my LMI G Series not delivering enough?
- M
  Michael VelasquezAug 17, 2025
  Insufficient pump delivery in your LMI Water Pump could stem from: * Incorrect capacity adjustment: Readjust the capacity setting. * Incorrect pump speed: Match the line voltage and frequency to the pump motor data plate. * Starved suction: Increase piping size or suction head. * Leaky suction piping: Repair the piping. * High suction lift: Rearrange equipment to decrease lift and/or install a foot valve in the suction line. * Liquid near boiling: Cool the liquid or increase the suction head. * Leaky safety valve in the discharge line: Repair or replace the valve. * High liquid viscosity: Reduce viscosity or consult the factory for special check valve options. * Worn or dirty check valve seats: Clean or replace them.
A
Aaron MeyerAug 20, 2025
What to do if LMI G Series delivery is erratic?
- S
  Steven RamosAug 21, 2025
  If your LMI Water Pump's delivery is erratic, consider these potential causes: * Leaky suction piping: Repair the piping. * Leaky safety valve: Repair or replace the valve. * Insufficient suction head: Raise the suction tank level and/or install a foot valve in the suction line. * Liquid near boiling: Cool the liquid or increase the suction head. * Worn or dirty check valves: Clean or replace them. * Clogged or dirty line strainer: Clean the strainer.
M
Michelle LambAug 25, 2025
Why are the motor and pump body of my LMI G Series Water Pump hot?
- P
  Pamela SmithAug 25, 2025
  The motor and pump body of the LMI Water Pump might be hot due to several reasons: * Normal operating temperature: The normal operating temperature of both motor and pump body is frequently uncomfortable to the touch. However, neither should exceed 200°F (93°C). * Power supply mismatch: Ensure proper matching of power supply and motor. * Overrated performance: Reduce pressure or stroke speed. If this is not practical, contact service facility. * Improper lubrication: Drain oil and refill with proper amount of recommended lubricant.
P
pricejulieAug 27, 2025
What to do if LMI G Series still pumps at zero capacity?
- Z
  Zachary RodriguezAug 27, 2025
  If your LMI Water Pump continues to pump even when set to zero capacity, it could be due to: * Misadjusted capacity knob: Readjust the capacity setting. * Insufficient discharge pressure: Correct the condition (e.g., install a back pressure valve).
P
Paul DavisAug 31, 2025
How to troubleshoot gear noise in LMI Water Pump?
- D
  David RiosSep 1, 2025
  Gear noise in your LMI Water Pump could be caused by: * Excessive backlash: Consult service facility. * Worn bearings: Consult service facility. * Wrong or insufficient lubricant: Replace or replenish lubricant.
M
Michael MosleySep 4, 2025
Why does my LMI G Series Water Pump make a loud knock with each stroke?
- J
  Joseph ChambersSep 4, 2025
  A loud knocking sound with each stroke in your LMI Water Pump may indicate: * Excessive gear set wear: Consult service facility. * Worn bearings: Consult service facility.
J
johnsonlauraSep 8, 2025
What causes noisy operation in the liquid end of an LMI G Series?
- C
  christopherfrancisSep 8, 2025
  The noisy operation in the liquid end of your LMI Water Pump may be due to: Noise in check valves: Ball checks move up and down with some force. A distinct "clicking" noise is normal, especially in metal piping systems.

LMI G Series Specifications

General

Series	G Series
Control	Manual
Materials	PVDF, Stainless Steel
Power Source	Electric
Material	Polypropylene, PVDF, Stainless Steel
Applications	Water treatment, chemical dosing

Summary

Macroy D Pump Model Number and Options

Frame and Liquid End Options

Lists codes and descriptions for pump frame and liquid end sizes.

Motor and Speed Options

Details codes for motor types and stroking speeds.

Material and Connection Options

Lists codes for liquid end materials and pump connections.

Section 1 Description

General Information

Overview of the Series G Model D metering pump features.

Principles of Operation

Explains the drive assembly and diaphragm liquid end operation.

General Specifications

Lists key specifications including flow rate, pressure, and accuracy.

Section 2 Installation

Unpacking

Instructions for carefully unpacking the pump and checking contents.

Storage

Guidelines for short-term and long-term storage to prevent corrosion.

Safety Precautions

Essential safety warnings and precautions for handling and installing the pump.

Mounting

Guidance on securely mounting the pump on a level, stable foundation.

Drip Collection

Provisions for collecting potential fluid leaks from diaphragm or oil seal failures.

Installation and Piping

General advice on installing the pump, including NPSH, piping, and ventilation.

Valves

Discusses back pressure, pulsation dampeners, safety, and shut-off valves.

Electrical Connections

Instructions for proper motor connection, including rotation and earthing.

Section 3 Operation

Start-Up Procedures and Checks

Steps for ensuring pump security, correct oil, and open valves before start-up.

Checking Motor Connections

Procedure to verify the motor's direction of rotation before pump operation.

Start-Up Process

Guidance on starting the pump, checking for noises, and priming the liquid end.

Capacity Calibration

Methods for testing and calibrating pump capacity after initial operation.

Section 4 Maintenance

Preventative Maintenance

Schedule for changing drive oil and replacing diaphragm/oil seal bellows.

Returning Pumps for Repair

Procedures and requirements for returning pumps for factory repair, including safety.

Routine Maintenance

Weekly checks for seal integrity, pump capacity, and leak detection.

Spare Parts Identification

List of recommended spare parts to stock for preventing repair delays.

Corrective Maintenance

Steps for cleaning check valves and replacing check valve assemblies.

Diaphragm and Oil Seal Bellows Replacement

Detailed steps for replacing the diaphragm and oil seal bellows.

Restarting the Pump

Steps to reconnect the pump, set capacity, and restart after maintenance.

Section 5 Parts List

Drive Parts List

Comprehensive list of spare parts for the pump drive assembly.

D2 Plastic Liquid End Parts

Spare parts list for D2 plastic liquid ends in various materials and connections.

SD2 Metallic Liquid End Parts

Spare parts list for SD2 metallic liquid ends made of stainless steel.

SD4 Metallic Liquid End Parts

Spare parts list for SD4 metallic liquid ends made of stainless steel.

D4 Plastic Liquid End Parts

Spare parts list for D4 plastic liquid ends with various materials and connections.

D7/D8 Plastic Liquid End Parts

Spare parts list for D7/D8 plastic liquid ends in PVC, PVDF, Polymer, Slurry, H2SO4.

SD7/SD8 Stainless Steel Liquid End Parts

Spare parts list for SD7 and SD8 stainless steel NPT liquid ends.

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