various (Service Manual)
Contents
1. 0 0 00 e eee eee 8 WisCOSIT EAC CHRIS GO ee eee ee 9 Pneumatic Meters Uses amp Operating Theory 9 Troubleshooting amp Maintenance Troubleshooting Chart 0 00 c eee ene eee 13 DISASGeMIDIVE ee ee eee eee 15 Cleaning and Inspection 0 000 cece eee 17 Contamination and Filtration Recommended Filtration 00 00 cece eee 18 Stabilized Contamination 0 000 ccc cee eae 18 Contamination Sources 0 00 ccc eens 18 Interchangeable Floating Orifice Disks Basic Application Information 0000 0c eee eee 19 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Specifications Casing Material Aluminum Brass or Stainless Steel 304 Aluminum and Brass 3500 psi 240 Bar Stainless Steel 304 6000 psi 413 Bar Reading Direct Reading 360 Ref Line Non Electrical Scale Accuracy 4 FS Center 1 3 of scale 2 5 FS Repeatability 1 FS Port Sizes 1 8 2 NPTF 6 32 SAE No Brass 1 4 2 BSP Series 2 1 1 4 O D x 4 13 16 Length 1 8 1 4 32mm O D x 122mm Length Series 3 1 7 8 O D x 6 9 16 Length 1 4 3 8 1 2 48mm O D x 167mm Length Installation Dimensions Series 4 2 3 8 O D x 7 5 32 Length Port Sizes Dimensions 3 4 1 60mm O D x 182mm Length Series 5 3 1 2 O D x 10 1 8 Length 1 1 4 1 1 2 90mm O D x 258mm Length Series 5 3 1 2 O D x 12 5 8 Length 2s 90mm O D x 322m2. the magnetic follower you will notice a slight resistance when removing cartridge If cartridge does not slide out insert a wooden dowel in opposite end of meter and push or lightly tap on dowel until cartridge comes loose 15 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 784 IMPORTANT If inner cartridge does not slide out freely it may be sign of contamination The transfer magnet is a powerful ALNICO magnet Keep it away from metal chips and fillings They may be hard to remove when reassembling and will cause premature failure 7 Examine inner cartridge or level of contamination A If inner cartridge has a low level of contamination and is functioning properly no further disassembly is required Proceed to Cleaning and Inspection See Illustration 5 B If inner cartridge appears to be highly contaminated or damaged it should be completely disassembled for cleaning and inspection Proceed with Step 8 Illustration 5 8 Remove outlet side spring end retainer clip See Illustration 6 which secured pilot disk to tapered center shaft 9 Remove return spring transfer magnet and floating orifice disk See Illustration 7 10 Proceed to Cleaning and Inspection After oe ee re the meter is cleaned Le i 2G reassemble parts in IMAN Eo peor ol Illustration 7 disassembly IMPORTANT Always use new retainer clips for reassembly 3 8 and 1 2 Wa
3. flow position Add some type of surge protection or problem my reoccur Malfunction Meter scale reading is off an equal amount at all points and the magnet follower still moves freely Possible Cause Corrective Action Reading the scale using the top or Be sure to read the scale using the bottom edge of the magnet follower black reference line which runs around the magnet follower Possible Cause Corrective Action Fluid being monitored may not be Standard meters are calibrated for compatible with standard meter scale 873 SP Gr oil at 110 43 C using Mobile DTE 25 Medium fluid Check your fluid data for a variance or call the factory for assistance Possible Cause Corrective Action All meters are calibrated in the vertical Check with the factory for a correction position factor or for a replacement scale cor rected for horizontal use 13 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 TROUBLESHOOTING CHART CONTINUED Malfunction Possible Cause Using incompatible cleaning solution on Lexan window tube Window tube is cracking or crazing Corrective Action Use soap amp water or a mild degreaser Stoddard or Naptha to clean Lexan tube To check the compatibility of your cleaning fluid call General Electric s Lexan Compatibility Reference line at 800 845 0600 Malfunction Scale is fogging or coming loose Possible Cause Ambient or fluid
4. outside of the body casing and is magnetically coupled to the internal transfer magnet As the flow rate increases the internal magnet moves along the tapered center shaft inside the body casing and the magnet follower moves along the outside of the body casing under the scale To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 FLOW METER CROSS SECTION 2 ee 0 G 7 qe X AE 10 e VO a 9 Illustration 1 1 End Porting 8 Flowing Sharp Edged Orifice Disk 2 Body Casing 9 Tapered Center Shaft 3 Magnet Follower 10 Transfer Magnet 4 Window Tube 11 Scale 5 Window Seal 12 Return Spring 6 Seal Assembly 13 Retainer Ring 7 Pilot Disk Cartridge contains 7 8 9 10 12 amp 13 Reading the Meter Notice the black reference line which runs 360 around the white magnetic follower This reference line moves under the scale in direct relation to the movement of the internal orifice disk When fluid is flowing the flow rate through the meter is read by lining up the black reference line with the closest rate line on the external flow scale Specific Gravity or Density Effect Standard meters are calibrated for either WATER with a specific gravity of 1 0 or OIL with a specific gravity of 873 The floating disk meter is effected by fluid density as are most other similar type meters Lake s meters have less of this effect because of the sharp ness of the floating orifice disks
5. rate m high turn down ratios m measuring accuracy within 4 of full scale m operation in any mounting orientation Lake meters are offered in three standard materials of construction m aluminum for standard monitoring applications to 600 PSIG m brass for media material compatibility m stainless steel for compatibility and operation to 1000 PSIG 9 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Measuring ranges cover 1 5 12 SCFM through 150 1300 SCFM Twenty four port sizes from 1 8 through 2 in NPT SAE and BSP can be ordered to meet specific plumbing requirements Lake s pneumatic meters are also available in alarm and transmitter configurations for electronic monitoring applications Standard Cubic Feet Lake s meter are calibrated to measure the 44 7 PSIA PSIG flow of compressible media gases in SCFM standard cubic feet per minute A standard cubic foot is defined as a cubic foot of dry air at standard atmospheric conditions 70 F and 14 7 PSIA 0 PSIG measured at sea level When a standard cubic foot of air is com pressed its actual volume will decrease pro portionally as absolute pressure increases For example a standard cubic foot of air s actual volume will decrease by 50 and den sity will increase by 100 as the air is com pressed from atmospheric pressure 14 7 PSIA 0 PSIG to 29 4 PSIA 14 7 PSIG See Illustration 2 There are three factors that aff
6. solvent IMPORTANT Some solvents may cause damage to Lexan tube check compatibility of solvent being used 7 Clean and inspect seal assemblies O rings and seals for nicks or cuts Replace as needed 8 Clean and inspect the meter every six months Properly filtered meters will provide years of trouble free service If the meter is not properly filtered it may be damaged and malfunction Meter damage caused by excessive contamination in not covered under warranty 17 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 CONTAMINATION AND FILTRATION Recommended Filtration The manufacturer recommends system filtration of at least 74 micron filter or a 200 mesh screen It has been found that if inadequate filtration has caused meter failure it will normally fail in the open position Some systems may require a magnetic filter IMPORTANT Meter damage caused by excessive contamination is not covered under warranty Stabilized Contamination The goal of filtration is to create effective protection from system contamination Proper filtration stabilizes contamination to allow fluid components to function properly A fluid system is considered stabilized when contamination in equals contamination out Proper filtration must reduce initial contamination to a stabilized level within an acceptable time period the system should be stabilized in time to prevent premature wear or damage to meter compon
7. temperature is too high Possible Cause Using incompatible cleaning solvents on scale Corrective Action Relocate meter in another area where temperature specifications are not being exceeded Corrective Action Use soap and water 14 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Disassembly Important It is not necessary to remove window tube or window seals to clean the meter Note also how the meter disassembles for easy of reassembly Warning Shut down system before removing meter from flow line 1 Use aclean dry cloth to remove all foreign Illustration 3 material from exterior of meter especially around threaded ends 2 Remove meter from the flow line 3 With the arrow on the scale pointing upward mount the meter in a vice See Illustration 3 Use the flats of the inlet end porting when securing the meter in the vice Important DO NOT wrench or tighten vice on Lexan tube iad 4 Install a wrench across the flats of the outlet end porting and turn counterclockwise to loosen assembly Do not remove end porting at this time 5 Remove meter from vice Hold the meter so the end port that is loose is on top Remove loose end porting 6 Tilt the open end of meter over a clean cloth to Illustration 4 expose inner cartridge See Illustration 4 Remove inner cartridge assembly from body casing Note Because the transfer magnet is magnetically coupled to
8. To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Flow Meters Installation Operating amp Maintenance Manual LAKE MONITORS INC Division of Total Automated Solutions Inc To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 This manual is a service guide produced by the manufacturer and provides specific procedures and or illustrations for disassembly assembly inspection cleaning and filtration When followed properly these procedures will keep your flow meter in top operating condition It is important for operators and maintenance personnel to be safety conscious when operating or repairing equipment Developing a thorough knowledge of the precautionary areas and following safe operating procedures can prevent equipment damage and or personal injury Before making any repair read all of the repair procedures to learn the correct method and all precautions Table of Contents Specification and General Information Specifications and Basic Application Information 3 Warning and Precautionary AreaS 0 00 eee eee eee 4 Installation Basic Installation Instructions 2 00 0c eee eee 5 Fluid Flow in Reverse Direction 200 ee ee eaee 6 Bi Directional Flow Measurement 0000 2 eee eee 6 Operation Operating Pringiples S WH eee 7 BeadingathesMeteneee MP eee 8 Specific Gravity or Density Effect
9. age the outer magnet follower from the transfer magnet If this occurs a shock suppressor should be used to eliminate malfunction 10 Teflon tape Caution should be used when using Teflon tape on pipe thread joints Leave at least 1 8 8mm of pipe thread exposed from end of pipe when applying tape 11 These meters as well as many other meters use an internal transfer magnet in the design Because of this magnet be aware of the following a Keep flow meters away from computer disks and tapes b If metal particles are moving through the system a magnetic filter may be required To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 INSTALLATION Basic Installation Instructions The meters are mounted in line and are direct reading The meters can be mounted in a vertical or horizontal position as long as the fluid is flowing in the direction of the arrow on the flow scale No straight pipe is required before or after the meter In fact 90 elbows can be installed on both ends without any noticeable flow variation When installing a meter apply Teflon Tape or Liquid Teflon Sealant on pipe threads If tape is used be sure to leave 1 8 8 mm of pipe thread exposed on end of pipe Position filter in front of meter and in a location that allows easy access for routine maintenance Refer to Warnings and Precautionary Areas for additional information INSTALLATION DOS AND DON T To obtain sa
10. ake Monitors for more information on reverse and bi directional flow 6 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 OPERATION Operating Principles Lake has developed a line of unique flow meters which combine the simplicity of a sharp edged orifice disk and a variable area flow meter See Illustration 1 Flow Meter Cross Section on page 8 The meters are tubular with all internal wetted parts sealed within the body casing Running through the center of the body casing is a tapered center shaft which is centered in the bore by pilot disks at each end Encircling the shaft is a sharp edged floating orifice disk transfer magnet and return spring The disk and transfer magnet are held in the no flow position by the biased return spring As the flow moves through the meter it creates a pressure differential across the floating orifice disk forcing the disk and transfer magnet against the return spring As flow increases the pressure differential across the disk increases forcing the disk and transfer magnet to move along the tapered center shaft As flow decreases the biased return spring forces the disk and transfer magnet down the tapered center shaft returning to the no flow position In metal casing meters we cannot see the movement of the floating orifice disk and transfer magnet because they are sealed inside the body casing Therefore a magnet follower is positioned around the
11. being used To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 The indicated flow reading will read high for heavier fluids and low for lighter fluids A corrective factor can be applied to the standard scale or a special scale can be added at a slight additional costs When flowing other specific gravities the basic equations below can be used For WATER Meters use V 1 0 Specific Gravity x scale reading For OIL Meters use V 873 Specific Gravity x scale reading Viscosity Effect The meters incorporate a unique floating sharp edged orifice disk The floating sharp edged orifice disk offers greater operating stability and accuracy over a wide range of viscosities PNEUMATIC METER USES amp OPERATING THEORY Lake s rugged high pressure pneumatic meters are designed for permanent installation in compressed gas systems These products provide a low cost means to measure compressor volumetric outputs pneumatic tool consumptions and other industrial gas flow rates Lake meters operate using the variable annular orifice method with compression spring return the identical method used in our field proven liquid flow rate meters The product s follower where the measurement is indicated is magnetically coupled through a high pressure casing to the meter s internal orifice assembly Benefits of these design features are m high operating pressure m linear displacement of the follower with respect to flow
12. correction factors will need to be applied to retain the design accuracy of the meter The appropriate correction factor equations are detailed above To assure the best monitoring accuracy pressure and temperature measurements should be taken directly at the meter s inlet port Special Scales Special calibrations can be performed by Lake Monitors to correct for the following system characteristics m system pressure m system temperature m media specific gravity m various measuring units i e LPM LPS m3 hr etc m any combination of the above Consult Lake s factory or your distributor for details and prices 11 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Selecting the Proper Meter To order a pneumatic flow meter the following information is required m pipe size and port style m media air nitrogen argon etc for material compatibility and specific gravity considerations m approximate flow range required m system pressure nominal maximum minimum m system temperature Flow Range Estimating the flow rate in a compressed gas system may seem complicated but with some research and a few simple equations an educated guess can be made Two suggested methods are Method 1 A compressor is typically rated in SCFM output at a certain pressure and efficiency If the rating cannot be located or is unknown an esti mate of compressor output can be obtained by the follow
13. ect the Flow Meter Calibration specific gravity pressure and temperature Lake meters are calibrated for air specific gravity of 1 0 at 70 F and 100 PSIG Most low pressure rotameters are cali brated at 0 PSIG and require corrections for use at any other pressure Lake products are designed for pneumatic systems where pressures between 90 110 Illustration 2 PSIG are used In these common applica tions a Lake monitor with a standard calibration can be read directly without applying corrections 10 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 DENSITY CORRECTION FACTORS SCFM indicated x CF SCFM Actual CF F4 x F2 X F3 Note all correction factors need not be used Table 1 f PRESSURE CORRECTION FACTORS inlet pressure psig 25 50 75 100 125 150 175 200 fy 14 7 psig 56 75 88 1 0 1 11 1 2 1 29 1 37 114 7 2 fg TEMPERATURE CORRECTION FACTORS 102 30 50 70 90 1102 1302 1502 fo 1 08 1 04 1 02 1 0 98 96 95 93 Table 3 f3 SPECIFIC GRAVITY CORRECTION FACTOR 1 f4 correction factor for other than 100 PSI inlet Sp Gr fo correction factor for other than 70 F fg correction factor for other than air at 1 0 Sp Gr Correction Factors If a Lake meter is installed in a system where conditions differ from the standard listed above
14. ents Contamination Sources Fresh Fluid When fresh fluid is stored in holding tanks it may be contaminated with scale or metal flakes from inside the tank To prevent this type of contamination be sure to filter fresh fluid before adding to the system New Machinery Contamination When building new machines a certain amount of built in contamination is unavoidable Typical built in contamination consists of dust dirt chips fibre sand flushing solutions moisture weld splatters and pipe sealants Flushing the system before operation can reduce contamination but cannot eliminate it totally Unless the system is flushed at a high velocity some contamination will not be dislodged until the system is in operation System contamination can cause fluid component malfunction Environmental Contamination When performing routine maintenance the system s fluid is commonly exposed to environmental contamination Exercise caution during routine maintenance to prevent this type of contamination Be sure to change breather filter and systems air filter regularly 18 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Self Generation Contamination Self generated contamination is a product of wear cavitation fluid breakdown and corrosion Systems that are carefully flushed maintained and have fresh fluid added mainly have self generated contamination In this case proper filtration can prevent fluid compo
15. ing formulas m 1 stage compressors motor HP 0 179 SCFM 100 PSIG m 2 stage compressors motor HP 0 164 SCFM 100 PSIG m 3 stage compressors motor HP 0 159 SCFM 100 PSIG Method 2 If all of the potential of a compressor is not being used the unit cycles on and off or if flow rate in excess of compressor capacity is being consumed the compressor cannot meet the demand a sum mation of machine usages can be totaled to determine the maximum flow rate Most machine tools that use compressed air specify the maximum consumption of the tool 12 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 TROUBLESHOOTING amp MAINTENANCE TROUBLESHOOTING CHART Malfunction Magnet follower sticks in mid scale and will not return to the no flow position Possible Cause Corrective Action Horizontal Vertical Mount Disassemble and inspect meter for Particulate Teflon tape rust or other contamination Install proper filtration foreign matter is holding the internal or problem may reoccur parts form returning Horizontal Vertical Mount A surge or shock in the fluid flow moved the internal magnet faster that the external follower could follow thus separating the follower from the magnet Warning Shut down systems before removing meter from flow line Remove meter from system Tip the meter so the arrow on the flow scale points upward This should return the magnet follower to the no
16. ldes No 5105 12H 3 4 and 1 and 1 1 4 and 1 1 2 Waldes No 5105 18H or obtain at no charge from the factory 16 9 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Cleaning and Inspection Note If the inner cartridge is damaged or contaminated beyond repair the complete meter can be sent to the manufacturer for evaluation The manufacturer will inspect repair and or replace parts as needed according to the warranty 1 Inspect inner cartridge and body casing for contamination If the inner cartridge did not slide out freely it may be a sign of contamination Locate and eliminate the source of contamination before reconnecting meter to the system or the same problem will reoccur It may be necessary to install finer filtration or a magnetic filter in the system 2 Soak inner cartridge assembly or individual parts depending on level of disassembly in a suitable cleaning solvent Naptha or Stoddard is recommended CAUTION When using an air hose wear proper eye protection 3 Remove parts from solvent Use an air hose and or scrub with a light brush to remove any remaining contaminants Remove any magnetized particles from transfer magnet 4 Inspect inner cartridge for scored or worn parts Replace parts as needed Parts are available from your local distributor 5 Remove any contaminants from inside body casing 6 Clean Lexan widow tube with soap and water or a compatible cleaning
17. m Length Maximum Pressure Installation Orientation Horizontal or Vertical Scaled Vertically Flow Straighteners Not Required Test Fluid Mobile DTE 25 Medium 110 F 43 C Basic Application Information The flow meter can be installed directly in the fluid line without flow straighteners or special piping The meter is used to measure the flow rate of most liquids which do not contain particles greater than 74 micron 1 External components are sealed inside the Lexan window tube to permit use in areas where the meter may be sprayed or washed with soap and water 2 Mount the meter in the most convenient location to allow easy access for reading and maintenance 3 The meter should NOT be mounted near hot pipes or equipment which can cause deformation of the window tube and scale 4 The meter should be mounted at least one foot 3 meter from large electric motors or the internal magnet may weaken or become demagnetized 5 Aluminum and brass meters should not be mounted where assembled piping is not supported 3 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Warning and Precautionary Areas 1 The meters are designed to operate in systems that flow in only one direction the direction of the arrow on the flow scale Attempting operation in the reverse direction may cause damage to the meter or other system components See page 6 for reverse and bi directional flow informati
18. nent malfunction INTERCHANGEABLE FLOW CARTRIDGE Basic Application Information This unique design permits the exchange of many different cartridges within the same meter thus allowing the conversion to other flow ranges at minimal cost The substitute cartridge offers different flow ranges at the same low pressure drop as the original Each cartridge comes with a new cartridge scale and installation instructions Check with your Lake Monitors distributor for prices and delivery 19 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 For downloadable product manuals data sheets and CAD drawings visit Lake s web site today www lakemonitors com LAKE MONITORS INC Division of Total Automated Solutions Inc LAKE MONITORS INC 2013 SOUTH 37TH STREET MILWAUKEE WI 53215 P 800 850 6110 414 671 3577 F 414 671 5253 WWW LAKEMONITORS COM LFMM 1205 Lake Monitors Inc 2005
19. on 2 The window tube of standard meters is made of Lexan Lexan can be safely cleaned with soap and water However many other cleaning agents can damage Lexan causing discoloration or crazing If you are unsure of your cleaning agent call the General Electric Lexan Compatibility Reference Line at 800 845 0600 3 To retain accuracy and repeatability many internal moving parts are precision machined and require filtration of at least 74 micron or a 200 mesh screen 4 All meters are tested and calibrated at our test facility using a light hydraulic oil The units are well drained but some oil residue may still remain within the meters Please check the compatibility with your fluid The meter may have to be cleaned before use See Cleaning amp Inspection section 5 When installing aluminum or brass meters onto steel pipe caution should be taken not to over tighten the pipe connections The thread in the meter end fittings may strip if over tightened 6 Aluminum and brass meters should not be used in systems where the assembled piping is not supported Heavy weight may cause the meter to bend or malfunction 7 Operating Temperature In standard meters several components have a maximum temperature rating of 240 F 115 C 8 Operating Pressure All meters are tested at a burst pressure three times of operating pressure Meters should not be used over the operating pressure rating 9 Pressure and flow surges may diseng
20. tisfactory operation from a Lake flow meter the following points should be considered DO m install a pressure gauge near the inlet of the meter m place throttling valves at the outlet of the meter use pipe sealer on the connections m install a union on one side of the meter for easy removal for maintenance and calibration install solenoid valves at meter outlet as far downstream as possible m mount in any orientation vertical horizontal or upside down DO NOT m place restrictions between the meter s pressure gauge meter inlet m use in systems where reverse flow is possible m place meter in non aligned piping m over flow the meter by more than 150 of maximum reading m operate at pressures and temperatures greater than specified install restrictions between pressure gauges and the meter inlet x install solenoid valves at the meter inlet pneumatic flow meter applications 5 To order this part call Lifco Hydraulics USA Toll Free at 1 800 952 7849 Fluid Flow in Reverse Direction The standard meter will not permit flow in the reverse direction opposite direction to the arrow printed on the flow rate scale In the reverse direction the meter will behave in a manner similar to a leaky check valve Prolonged flow in the reverse direction will cause damage to the standard meter s internal mechanism that could result in inaccurate readings or premature failure of the meter If the standard meter
21. will be installed in a system where reverse flow is possible Lake recom mends that a check valve be installed in parallel with the meter in order to facilitate reverse flow around the meter Check valves are readily available through fluid component distributors Alternatively flow meters with a built in reverse flow bypass mecha nism may be specified and ordered for a small additional cost These meters are designated by a RF suffix attached to the end of the standard 8 digit model code Flow meters with the built in reverse flow bypass will allow flows in the reverse direction of up to the maximum flow rate printed on the flow rate scale without any damage to the monitor s internals If the part number label on the meter that is being installed shows a model code containing the RF suffix then the meter may be installed in systems where reverse flow is possible without the need for an external check valve Bi Directional Flow Measurement In certain situations it may be necessary to measure flow rates in both directions For a small additional fee an option for bi directional flow measurement may be specified Meters that include this option are designated by a Bl suffix attached to the end of the standard 8 digit model code If the part number label on the meter that is being installed shows a model code containing the BI suffix then the meter may be installed in any orientation regardless of flow direction Contact L
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