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Liquiflo

Installation, Operation & Maintenance Manual

Max

Series Sealed Pumps

Models M2 thru M8

7: Troubleshooting

Guide

Troubleshooting Guide - Part 1

Problem

Possible Cause

Corrective Action

Pump not primed

Verify suction pipe is submerged.
Increase suction pressure.
Open suction valve.

Wrong direction of rotation

Reverse motor leads.

Valves closed

Open all suction and discharge valves.

Bypass valve open

Close bypass valve.

Air leak in suction line

Tighten connections.
Apply sealant to all threads.
Verify suction pipe is submerged.

Clogged strainer

Clean strainer.

No discharge

Pump worn or damaged

Rebuild pump.

Suction pressure too low

Increase suction pressure.
Verify suction piping is not too long.
Fully open any suction valves.

Bypass valve open

Close bypass valve.

Partly clogged strainer

Clean strainer.

Speed too low

Increase driver speed, if possible.
Use larger size pump, if required.

Insufficient

discharge

Pump worn or damaged

Rebuild pump.

Pump not properly primed

Reprime pump.

Air leaks in suction line

Tighten connections.
Apply sealant to all threads.
Verify suction pipe is submerged.

Air or vapor pockets in suction line

Rearrange piping as necessary.

Loss of suction

after satisfactory

operation

Increase in fluid viscosity

Heat fluid to reduce viscosity.
Reduce pump speed.

Fluid viscosity higher than specified

Heat fluid to reduce viscosity.
Reduce pump speed.
Increase driver horsepower.

Differential pressure greater than
specified

Increase pipe diameter.

Gear clearances insufficient for
fluid viscosity

Purchase gears trimmed for the correct
viscosity.

Plastic gear clearance insufficient
for fluid temperature

Purchase plastic gear trimmed for the
correct temperature.

Excessive power

consumption

Rotating parts binding or severely
worn

Disassemble and replace worn parts.

Содержание MAX M2

Страница 1: ...6 M7 M8 Table of Contents 1 General Information 2 3 2 Safety Precautions 4 3 Pump Motor Installation 5 4 Start Up Operation 6 5 Maintenance Repair 7 11 6 Exploded View Reference Drawings 12 13 7 Troubleshooting Guide 14 15 Feb 2005 Document No 3 20 085 Liquiflo 443 North Avenue Garwood NJ 07027 USA Tel 908 518 0777 Fax 908 518 1847 ...

Страница 2: ...en damaged in transit B Verify that the pump Model Code and Serial Number are stamped on the circular tag on the rear housing of the pump C Verify that the Liquiflo Nameplate is secured to the pump D Verify the Group and Category Codes Explanation of Nameplate Group II Explosive atmospheres Category 2 Equipment provides a high level of protection Explosive atmospheres only are likely to occur Cate...

Страница 3: ... 6 5 1 5 5 1 5 5 1 5 4 1 2 3 0 9 ft m Suction Lift dry RMS 2 0 6 4 1 2 6 1 8 6 1 8 7 2 1 6 1 8 14 4 3 ft m Weight 7 39 17 7 39 5 17 9 40 18 1 42 19 1 54 24 5 55 5 25 2 56 25 4 lbs kg RMS Recommended Maximum Speed NPSHR Net Positive Suction Head Required FOOTNOTES 1 Under special conditions Models M2 thru M4 can be operated up to 3600 RPM Consult factory 2 Based on new pump operating at RMS and 0 P...

Страница 4: ... without making sure that the pump is primed Inspect the entire system before start up Monitor the system during operation and perform maintenance periodically or as required by the application Decontaminate pump using procedures in accordance with federal state local and company environmental regulations Before performing maintenance on the pump check with appropriate personnel to determine if sk...

Страница 5: ...olate the pump during maintenance G Suction and discharge piping should be the same size or larger than the inlet and outlet ports H Clean piping as necessary to remove dirt grit weld slag etc I For further instructions on mounting or installing your pump refer to the Hydraulics Institute Handbook J A positive displacement pump should have a pressure relief valve installed in the discharge line Th...

Страница 6: ...t least 20 PSI 1 4 bar differential pressure D The pump is capable of pulling a dry lift but it is still recommended to prime the pump prior to start up E A pressure relief valve should be installed in the discharge line to protect the pump and other system components from any type of line blockage including the inadvertent closing of an isolation valve F If the fluid contains suspended solids a f...

Страница 7: ...ce review the Safety Precautions given on Page 4 and pay special attention to the cautionary statements given in the following sub sections CAUTION If the pump was used to move hazardous or toxic fluids it must be flushed and decontaminated prior to removal from the system piping Refer to the Material Safety Data Sheet MSDS for the liquid and follow all prescribed safety precautions and disposal p...

Страница 8: ...ish off any burrs or sharp edges on the drive shaft before removing the mechanical seal 6 Remove the seal positioning retaining ring 10 from the drive shaft Note If the pump has a double mechanical seal there will be a second seal seat with O ring installed on the drive shaft instead of the retaining ring If this is the case remove the seal seat and discard the O ring 7 Remove the four housing bol...

Страница 9: ...se O rings 5 Insert housing O rings 5 into the circular grooves of the center housing 20 6 Place center housing onto rear housing and insert two wear plates 7 Note The wear plates have relief grooves to minimize hydraulic separation forces These relief grooves must face the gears to operate properly 7 Insert the idler and drive gear shaft assemblies into the center rear housing Note The drive shaf...

Страница 10: ...y seal seat 16 Note Lubricate O ring with a compatible lubricant such as vegetable oil This will facilitate installation of the seal seat into the front housing b Press the seal seat with O ring firmly into the front housing 8 c Slide the double mechanical seal 14 onto the drive shaft DO NOT tighten the setscrews on the mechanical seal body at this time d Attach the seal housing 11 to the front ho...

Страница 11: ... flange 28 18 Models M2 M4 Bolt the bracket 26 to the motor 12 using four bolts 15 Models M5 M8 Bolt the motor 31 to the pedestal 26 using four bolts 15 19 Bolt the pump to the bracket or pedestal 26 using four bolts 24 Note Models M5 M8 must have the adapter ring 12 installed between the pump and pedestal CAUTION Be certain that the coupling flanges are properly spaced and not touching each other...

Страница 12: ... 1 22 Key Gear 2 7 Wear Plate 4 23 Pin Housing Alignment 4 8 Front Housing 1 24 Bolt Frt Hsg 5 16 18 x 5 8 SHCS 4 9 Plug 1 8 NPT Hex Socket 2 25 Pin Bearing Lock 4 10 Retaining Ring 5 26 Mounting Bracket 1 11 Seal Housing 1 27 Key Coupling Pump Side 1 12 Motor C Face 1 28 Coupling Flange Motor Side 1 13 Bolt Seal Hsg 1 4 28 x 5 8 SHCS 4 29 Coupling Flange 1 2 Pump Side 1 14 Mechanical Seal Assembl...

Страница 13: ... O ring Housing 2 21 Drive Gear 1 6 Idler Gear 1 22 Key Gear 2 7 Wear Plate 4 23 Pin Housing Alignment 4 8 Front Housing 1 24 Bolt Frt Hsg 3 8 16 x 1 5 8 SHCS 4 9 Plug 1 8 NPT Hex Socket 2 25 Pin Bearing Lock 4 10 Retaining Ring 5 26 Pedestal 1 11 Seal Housing 1 27 Key Coupling Pump Side 1 12 Adapter Ring 1 28 Coupling Flange Motor Side 1 13 Bolt Seal Hsg 1 4 28 x 5 8 SHCS 4 29 Coupling Flange 3 4...

Страница 14: ...ean strainer Speed too low Increase driver speed if possible Use larger size pump if required Insufficient discharge Pump worn or damaged Rebuild pump Pump not properly primed Reprime pump Air leaks in suction line Tighten connections Apply sealant to all threads Verify suction pipe is submerged Air or vapor pockets in suction line Rearrange piping as necessary Loss of suction after satisfactory o...

Страница 15: ...ase NPSH available Static seal failure caused by chemical incompatibility or thermal breakdown Use O rings or gaskets made of material compatible with fluid and temperature of the application Static seal failure caused by improper installation Install O rings or gaskets without twisting or bending Use star pattern torque sequence on housing bolts during assembly Allow Teflon O rings to cold flow a...

Страница 16: ... 0 3 E 0 0 co I 3 0 u 0 2 MO Performance Curve on Oil 100 cps 0 5 0 4 1800 npm 1200 0 1 0 0 50 100 150 200 250 Differential Pressure psi 300 350 ...

Страница 17: ... E 0 0 Q ro 0 6 0 0 LL M1 Performance Curve on Oil 100 cps 1 2 1 0 8 0 4 0 2 0 0 100 150 200 250 Differential Pressure psi 300 350 50 1800rpm 1200 900 ...

Страница 18: ... 10 9 8 7 6 5 4 3 2 1 0 FLOW GPM 300 1800 600 300 0 6 0 5 0 4 0 3 0 2 0 1 0 1800 1 cP Fluid Water 0 2 4 6 8 BAR DIFFERENTIAL PRESSURE PSI 3 0 2 5 2 0 1 5 1 0 0 5 0 200 150 100 50 350 0 1500 1200 900 POWER BHP LPM 11 10 9 8 7 6 5 4 3 2 1 0 FLOW GPM 300 1800 0 6 12 18 BAR 600 300 1 50 1 25 1 00 0 75 0 50 0 25 0 1800 100 cP Fluid Oil 300 250 24 ...

Страница 19: ...R 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 1 cP Fluid Water 1500 600 300 1800 900 1200 LPM 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DIFFERENTIAL PRESSURE PSI 200 150 100 50 350 0 POWER BHP FLOW GPM 300 1800 0 6 12 18 BAR 2 1 1 8 1 5 1 2 0 9 0 6 0 3 0 100 cP Fluid Oil 300 250 24 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 LPM 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1500 600 300 1800 900 1200 ...

Страница 20: ...0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 1 cP Fluid Water 1500 600 300 1800 900 1200 LPM 22 20 18 16 14 12 10 8 6 4 2 0 5 5 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 POWER BHP 300 1800 2 75 2 50 2 25 2 00 1 75 1 50 1 25 1 00 0 75 0 50 0 25 0 1500 600 300 1800 900 1200 DIFFERENTIAL PRESSURE PSI 200 150 100 50 350 0 FLOW GPM 0 6 12 18 BAR 100 cP Fluid Oil 300 250 24 LPM 22 20 18 16 14 12 10 8 6 4 2 0 ...

Страница 21: ... 8 BAR 1 8 1 6 1 4 1 2 1 0 0 8 0 6 0 4 0 2 0 1 cP Fluid Water 1500 600 300 1800 900 1200 LPM 36 32 28 24 20 16 12 8 4 0 9 8 7 6 5 4 3 2 1 0 300 1800 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 1500 600 300 1800 900 1200 DIFFERENTIAL PRESSURE PSI 200 150 100 50 350 0 FLOW GPM 0 6 12 18 BAR 100 cP Fluid Oil 300 250 24 LPM 36 32 28 24 20 16 12 8 4 0 ...

Страница 22: ...1 20 1 05 0 90 0 75 0 60 0 45 0 30 0 15 0 1 cP Fluid Water 1500 600 300 1800 900 1200 LPM 50 45 40 35 30 25 20 15 10 5 0 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POWER BHP 300 1800 6 5 6 0 5 5 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 1500 600 300 1800 900 1200 DIFFERENTIAL PRESSURE PSI 200 150 100 50 350 0 FLOW GPM 0 6 12 18 BAR 100 cP Fluid Oil 300 250 24 LPM 50 45 40 35 30 25 20 15 10 5 0 ...

Страница 23: ... 1 05 0 90 0 75 0 60 0 45 0 30 0 15 0 1 cP Fluid Water 1500 600 300 1800 900 1200 LPM 60 55 50 45 40 35 30 25 20 15 10 5 0 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POWER BHP FLOW GPM 300 1800 8 0 7 5 7 0 6 5 6 0 5 5 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 1500 600 300 1800 900 1200 DIFFERENTIAL PRESSURE PSI 200 150 100 50 350 0 0 6 12 18 BAR 100 cP Fluid Oil 300 250 24 LPM 60 55 50 45 40 35 30 2...

Страница 24: ...6 8 BAR 3 0 2 7 2 4 2 1 1 8 1 5 1 2 0 9 0 6 0 3 0 1 cP Fluid Water 1500 600 300 1800 900 1200 LPM 80 70 60 50 40 30 20 10 0 20 18 16 14 12 10 8 6 4 2 0 POWER BHP 300 1800 10 9 8 7 6 5 4 3 2 1 0 1500 600 300 1800 900 1200 FLOW GPM DIFFERENTIAL PRESSURE PSI 200 150 100 50 350 0 0 6 12 18 BAR 100 cP Fluid Oil 300 250 24 LPM 80 70 60 50 40 30 20 10 0 ...

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Liquiflo MAX M2, Инструкция по установке, эксплуатации и обслуживанию

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