how to fix lmi and roytronic metering pumps

Troubleshooting LMI Troubleshooting LMI andand LMI LMI RoytronicRoytronic®® Pumps Pumps

LMILMI RoytronicRoytronic®®LMI

IntroductionIntroduction

Problems

Causes

Solutions

Helping your customers when their pump stops working.

Troubleshooting OverviewTroubleshooting Overview

These five problems will be addressed:These five problems will be addressed:

I.I. Pump will not prime or loses primePump will not prime or loses prime

II.II. Leakage at tubing or fittingLeakage at tubing or fitting

III.III. Low output Low output – – fails to pump against pressurefails to pump against pressure

IV.IV. Excessive pump outputExcessive pump output

V.V. Failure to runFailure to run

Protective Clothing and Protective Clothing and Eye ProtectionEye Protection

Wear protective clothing and Wear protective clothing and eye protectioneye protection

Check MSDS sheet for other Check MSDS sheet for other precautionsprecautions

I.I. Pump Will Not Prime or Pump Will Not Prime or Loses PrimeLoses Prime

Possible CausePossible Cause

Output dials not set Output dials not set properlyproperly

SolutionSolution

Always prime pump Always prime pump with speed at 80% with speed at 80% and stroke at 100%and stroke at 100%

STROKE LENGTH KNOB

SPEED KNOB

I. Pump Will Not Prime or Loses I. Pump Will Not Prime or Loses PrimePrime


Foot valve not in vertical position on bottom of tank

SolutionSolution

Foot valve must be Foot valve must be verticalvertical

Foot valveFilterscreen

Ceramic

weight

I.I. Pump Will Not Prime Pump Will Not Prime or Loses Primeor Loses Prime

Possible CausePossible CausePump suction lift tooPump suction lift too

highhigh

SolutionSolution

Keep Suction

Lift< 5 FT

I. Pump Will Not PrimeI. Pump Will Not Primeor Loses Primeor Loses Prime


Pump suction lift too high

SolutionSolution Pumps with high

viscosity liquid-handling assemblies require flooded suction

Possible CausePossible Cause Suction tubing is

curved or coiled in tank

SolutionSolutionSuction tubing must be

vertical

I.I. Pump Will Not PrimePump Will Not Primeor Loses Primeor Loses Prime

Parts Item # 32293

Possible CausePossible Cause Air trapped in suction

tubing

SolutionSolution Suction tubing should

be as vertical as possible. Avoid false flooded suction!



Possible CausePossible CauseSolution container Solution container

ran dryran dry

SolutionSolutionRefill container with Refill container with

solution and reprimesolution and reprime

I.I. Pump Will Not PrimePump Will Not Prime or Loses Prime or Loses Prime


Air leak on suction side

SolutionSolutionCheck for pinholes

and/or cracks

Replace if necessary

AutoPrime AutoPrime ValveValve


For use with sodium hypochlorite and hydrogen peroxide applications

Automatic re-prime

Retrofit existing pumps

LMI Roytronic: Liquid EndsLMI Roytronic: Liquid Ends

Mach AutoPrime HeadMolded FastPrime Head Mach FastPrime Head

7X8 NI7X8 SI8XX SI

9XX SI 9XX HI

I.I. Pump Will Not Prime or Loses Prime Pump Will Not Prime or Loses Prime

LMI RoytronicLMI Roytronic®® AutoPrime HeadAutoPrime Head

Features:

Improved compact design

Addition of second ball in the

de-gassing valve prevents back-flow

4FV can be added for yet more features

Machined Acrylic and PVC Head Only (No molded version)

One-Way Degassing

Valve

Suction Check Valve

Spring-LoadedDischarge Check Valve

IIII.. Leakage at Tubing or FittingLeakage at Tubing or Fitting


Worn tubing endsSolutionSolution

Cut about 1 inch (25mm) off end of tubing and reinstall

II. Leakage at Tubing or FittingII. Leakage at Tubing or Fitting

Possible CausePossible Cause Loose or cracked Loose or cracked

fittingfitting

SolutionSolutionReplace the fitting if crackedReplace the fitting if cracked

Carefully - tightenCarefully - tighten

Once fitting comes into contact Once fitting comes into contact with seal ring, tighten an with seal ring, tighten an additional 1/8 or 1/4 turnadditional 1/8 or 1/4 turn

All LMI pumps have straight screw machine All LMI pumps have straight screw machine threads on the head and fittings and are sealed threads on the head and fittings and are sealed by the seal rings or O-rings. by the seal rings or O-rings.

DO NOT use TeflonDO NOT use Teflon®® tape or pipe dope to seal tape or pipe dope to seal threads. Teflonthreads. Teflon®® tape may only be used on tape may only be used on the ½the ½"" NPT thread side of the Injection Check NPT thread side of the Injection Check Valve as well as stainless steel liquid end Valve as well as stainless steel liquid end connections.connections.

All fittings should be -tightened. An additional All fittings should be -tightened. An additional 1/8-1/4 turn may be necessary to provide a leak-1/8-1/4 turn may be necessary to provide a leak-proof seal. proof seal.

IIII.. Leakage at Tubing or FittingLeakage at Tubing or Fitting


Worn seal ringsWorn seal ringsSolutionSolution

Replace seal rings and ballsReplace seal rings and balls

Purchase Spare Parts SP-XX or

RPM PRO PAC™ kit


Compression washers are Compression washers are located in fittings and located in fittings and function valves function valves

If necessary, remove the If necessary, remove the washer washer

Push washer into fitting Push washer into fitting

by to avoid by to avoid damagedamage

How to: Replace a Compression Washer

II. Leakage at Tubing or II. Leakage at Tubing or FittingFitting

BOTTOM

TOP

Directionof Flow

CORRECT

INCORRECT

SmoothsideBall seat

side

TOP

BOTTOM

How to:How to: Correctly Install Cartridge Valves


Install new cartridge valves or Install new cartridge valves or check valve balls and seal check valve balls and seal rings in pump headrings in pump head

O-ringO-ring

How to:How to: Replace Suction and Discharge Cartridge Valves (Check Valve)

Directionof

Flow

Configuration 2

FOOTVALVEFOR LARGER

PUMPS (WITHOUT CARTRIDGE)

Configuration 1

FOOTVALVEFOR SMALLER

PUMPS(WITH CARTRIDGE)

CARTRIDGEVALVE SHOWN

DIS-ASSEMBLED {{ SEAL RING

BALL

Foot Valves come in TWO basic configurations


Place O-ring on Place O-ring on cartridge valvecartridge valve

Position Position ball seat sideball seat side of cartridge valve of cartridge valve toward floortoward floor

II. Leakage at TubingII. Leakage at Tubing or Fittingor Fitting

CARTRIDGEVALVE

O-RING

How to: Install new cartridge valve and O-ring

(Floor)

(Ceiling)(Ceiling)

Position Position ball seat ball seat side this side this surface surface down.down.

- tighten

SPRING

BALL

PTFE SEAT

O-RING

Install New Injection Check Valve Components

II. Leakage at Tubing or FittingII. Leakage at Tubing or FittingFlapperFlapperValveValve

- tighten

III. Low Output/Fails to Pump Against PressureIII. Low Output/Fails to Pump Against Pressure

Possible CausePossible Cause System pressure System pressure

exceeds pump’s exceeds pump’s maximum pressuremaximum pressure

SolutionSolution Do not exceed Do not exceed

maximum on Pump maximum on Pump Data PlateData Plate

Replace worn Replace worn

parts every parts every

6-12 months6-12 months

carries parts carries parts and kitsand kits


Possible CausePossible CauseWorn seal ringsWorn seal rings

SolutionSolution Replace worn seal rings or

cartridge valves

Purchase

Spare Parts SP-XX

or

RPM PRO PAC™ kit



PossiblePossible CauseCausePPressure control setting ressure control setting is incorrectis incorrect

SolutionSolutionChange pressure settingChange pressure setting

9 Series Pump

Note: Pressure level ranges from 0 – 5

Press the Mode Key and Up Key simultaneously and hold for 2 seconds

Alter the pressure using Up and Down Keys

P5

Pressure level

control

Mode Key

Up Key

Down Key


Possible CausePossible CausePressure control setting Pressure control setting is incorrectis incorrect

SolutionSolutionChange pressure settingChange pressure setting

Adjust with screw driver

B/C & 7 Series Pump

PossiblePossible CauseCause

Ruptured Liquifram™Ruptured Liquifram™

(diaphragm)(diaphragm)

SolutionSolution

Replace Liquifram™ Replace Liquifram™ (diaphragm)(diaphragm)


Replacing the Liquifram™Replacing the Liquifram™

TURN THE PUMP OFF!TURN THE PUMP OFF!Twisting the pressure relief Twisting the pressure relief

knob (black) 1/4 turnknob (black) 1/4 turn

will de-pressurize the linewill de-pressurize the line

Step 1: De-pressurize the Liquid End

III. Low Output/Fails to Pump Against Pressure


Turn the coupling nut Turn the coupling nut

and remove the tubing from and remove the tubing from

the fitting by pulling upthe fitting by pulling up..

Step 2: Remove the Discharge Tubing


Turn the coupling nutTurn the coupling nut

to remove and pull the tubing to remove and pull the tubing out of the valve out of the valve

Step 3: Remove the Return Line Tubing



Turn the 4-FVTurn the 4-FV

to removeto remove


Step 4: Remove the 4-FV


Remove the suction tubing by Remove the suction tubing by unscrewing itunscrewing it

Remove the cartridge valve or Remove the cartridge valve or check valve ball and seal check valve ball and seal ring from the pump headring from the pump head

Step 5: Remove the suction fitting



Remove the four screws Remove the four screws that mount the pump that mount the pump headhead

Step 6: Remove the pump head



Remove the pump Remove the pump LiquiframLiquifram™™ by turning it by turning it


Step 7: Remove the pump Liquifram™Liquifram™


Discard the LiquiframDiscard the Liquifram™™ and inspect the backing and inspect the backing disk for damagedisk for damage

Step 8: Remove the Liquifram™Liquifram™ and the backing disk


Liquifram™Liquifram™

Backing disk


Remove used shaft sealRemove used shaft seal

Step 9: Remove the shaft sealRemove the shaft seal



Push the seal in place by Push the seal in place by using a large hollow pen using a large hollow pen cap or wrench socket cap or wrench socket large enough to clear large enough to clear the Liquiframthe Liquifram™™ shaft shaft

Step 10: Install the new shaft

Replacing the Liquifram™Replacing the Liquifram™ III. Low Output/Fails to Pump Against Pressure


Step 10 (cont.)



Step 10 (cont.)Before starting the pump, match the pump series with

the stroke knob setting on this chart.


LiquiframLiquifram™ ™ Stroke Setting ChartStroke Setting Chart Pump SeriesPump Series Stroke Knob SettingStroke Knob Setting

All A, B, J and P SeriesAll A, B, J and P Series

C10, C11, C12, C70, C71, C72, C76, C10, C11, C12, C70, C71, C72, C76, C90, C91, C92, E70, E71, E72C90, C91, C92, E70, E71, E72

90%90%

C78C78 50%50%

C13, C14, C73, C74, C77, C93, C94, C13, C14, C73, C74, C77, C93, C94, E73, E74E73, E74 70%70%

Turn both the disk and Turn both the disk and new Liquiframnew Liquifram™™

moving the Liquiframmoving the Liquifram™™ until its center is flush until its center is flush with the outside housingwith the outside housing

Step 11: Install the disk and new Liquifram™



Replacing the Liquifram™Replacing the Liquifram™ III. Low Output/Fails to Pump Against Pressure

Lightly re-install the four Lightly re-install the four mounting screws and mounting screws and then tighten gradually in then tighten gradually in a crisscross pattern a crisscross pattern until tightuntil tight

Step 12: Re-install the Pump Head


You’re done replacing the Liquifram™ . . .


Install the 4-FV and Install the 4-FV and the suction valvethe suction valve

Re-connect the Re-connect the tubing on suction tubing on suction and discharge and discharge sidessides



PossiblePossible CauseCause

Incorrect stroke lengthIncorrect stroke length

SolutionSolution

Check zero or re-zero pumpCheck zero or re-zero pump

With pump runningWith pump running, turn stroke knob, turn stroke knob

toward zero or end of black or red band toward zero or end of black or red band on dialon dial

The pump should operate quietly The pump should operate quietly without clicking at the zero position; if without clicking at the zero position; if not, the pump zero must be reset. not, the pump zero must be reset.

Remove stroke knob by grasping the knob firmly and pulling it toward you

Pry off the yellow cap

Place the knob on a flat surface

Using needle-nose pliers, squeeze the inner section together while lifting the outer section up

Push the inner section back onto the “D”-shaped stroke

HOW TO: Re-Zero Type I Pump -- Push-On KnobHOW TO: Re-Zero Type I Pump -- Push-On Knob


HOW TO: Re-Zero Type I Pump -- Push-On Knob (Cont.)HOW TO: Re-Zero Type I Pump -- Push-On Knob (Cont.)

With the pump running, zero the pump as before

Push down on the outer section (a snap sound indicates parts are locked together)

Replace the yellow cap over the outer section of the knob, aligning the tabs on the cap with the slots inside the knob


How to: Re-Zero Type II Pump -- Collet KnobHow to: Re-Zero Type II Pump -- Collet Knob

1. Remove the Yellow Cap2. Hold knob with soft jaw pliers3. Loosen but do not remove the 5/16” (8mm) collet nut to

disconnect the knob4. Pull the knob toward you to remove5. With the pump running, zero the pump as before6. Position the knob at zero, or the end of the low range

band, and tighten the 5/16” (8mm) collet nut7. Replace the yellow cap


Stroke Adjustment for the Roytronic® pump

1. Install a new Stroke Shaft. There might be resistance as the O-ring slides into the control panel. To get the STROKE SHAFT completely forward, turn the Stroke Shaft by using the Stroke Knob until there is no diaphragm movement. It may be necessary to turn on the pump in order to get the SHAFT forward.

2. Once the Stroke Shaft is completely forward, reset the stroke length by pressing in the Stroke Knob so that the Stroke Knob Pointer indicates 0 (zero)

3. Install the Stroke Knob Screw using a Phillips

4. Insert the Stroke Knob Pointer into the Stroke Knob

RoytronicRoytronic®®RoytronicRoytronic®®


TO AVOID PUMP DAMAGE be sure the Stroke Shaft is contacting the plunger before turning on pump

Possible Cause Tubing run on discharge Tubing run on discharge

may be too long.may be too long.

SolutionReduce tubing run lengthReduce tubing run length

Shorten tube length for Shorten tube length for higher viscosity fluidshigher viscosity fluids

Increase tube diameter to Increase tube diameter to permit longer run permit longer run lengthlength

Consult Consult for more informationfor more information


Possible CauseClogged Foot Valve Clogged Foot Valve strainerstrainer

SolutionRemove the Remove the

Foot Valve Foot Valve Strainer and Strainer and clean it. clean it.

Replace if Replace if cracked or cracked or damageddamaged

Foot Valve Strainer


IV.IV. Excessive Pump Output Excessive Pump Output

Possible Cause

Siphoning (pumping Siphoning (pumping downhill without a downhill without a multi-function valve)multi-function valve)

Solution

Move injection point to a pressurized location or install an LMI 4-FV when applicable

IV.IV. Excessive Pump OutputExcessive Pump Output

Possible Cause

Little or no pressure at injection point

Solution If pressure at

injection point is less than 25 PSI (1.7 Bar) install an LMI multi-function valve when applicable


Remove the yellow screw cap on the top of the pump head and screw in the valve so that it contacts the O ring. An additional 1/8 -1/4 turn may be necessary to prevent leakage

1/4" O.D. tubing connects to the side of the valve and acts as a return line to the solution tank. To ensure priming, this tubing must NOT be submerged in the solution.

Secure return line to ensure pumped solution returns to supply tank

Multi-Function (4-FV) Valve Tubing Connection


Improves diaphragm sealing

Double ball design


Encapsulated Encapsulated HardwareHardware

Ergonomic Ergonomic KnobsKnobs

FEATUREFEATURE

RICHRICH

FEATUREFEATURE

RICHRICH

Mates onto discharge

check valve giving

customer control of rotational alignment


NEW TUBING CONNECTIONS



DO NOT OVER TIGHTEN

STEP 1 Thread the 4FV fitting

onto the head

STEP 2.

Insert ¼" tubing through Bleed Nut

DO NOT SUBMERGE TUBING IN SOLUTION

Assemble 4FV Fitting and Coupling Nut with appropriate cartridges into the discharge

port of the pump. Use 13/16” or 20mm socket wrench to tighten to 50 inch-pounds.

STEP 3.

- tighten

Bleed Nut

NOTE


O-Ring

O-Ring

IV.IV. Excessive Pump OutputExcessive Pump Output

Possible Cause

Excessive strokes Excessive strokes per minuteper minute

Solution

ConsultConsult

PULSER may need PULSER may need replacementreplacement

V. Failure to RunV. Failure to Run

Possible CausesEPU (Electronic EPU (Electronic

Processing Unit) Processing Unit) or or

PULSER failurePULSER failure

Solution

DO NOT VOID YOUR DO NOT VOID YOUR WARRANTY WARRANTY

by attempting to repair your by attempting to repair your EPU or PULSER EPU or PULSER

yourselfyourself

Contact Contact

Authorized Warranty Authorized Warranty Service CenterService Center

TROUBLESHOOTINGTROUBLESHOOTINGLMI and ROYTRONICLMI and ROYTRONIC

®® PUMPS PUMPS

how to fix lmi and roytronic metering pumps

Self Improvement

prime pump

prime leakage

fitting solution

possible cause suction

vertical pump

pump head oring

fitting possible cause

tank solution suction