In-line Pneumatic Flow Meter Installation & Maintenance
Contents
1. Instructions In line Pheumatic Flow Meter Installation amp Maintenance HED TAN DIVISION OF RACINE FEDERATED INC FORM HLIT 208 2G 8635 Washington Avenue Racine Wisconsin 53406 3738 TEL 1 800 HEDLAND FAX 1 800 CHK FLOW I INTRODUCTION The In line Pneumatic Flow Meter is a rugged industrial class flow rate indicator offered in aluminum brass T303 and T316 stainless steel models to monitor pressurized air lines and or a wide range of other compressed gases Available in seven port sizes from 14 to 3 for flow ranges from 0 5 5 scfm 0 2 2 2 l sec through 200 2200 scfm 75 1130 l sec meters are calibrated at 1 0 specific gravity In addition to the basic model the aluminum brass and T303 stainless steel models are offered in 3 other configurations an extended inlet cap fitted with a pressure gauge an extended inlet cap with a 4 NPTF plugged gauge port and a test kit with an extended inlet cap fitted with a 160 psi pressure gauge and control valve on the outlet The Flow Meter is equipped with a 360 rotatable guard scale which allows the meter to be installed in any orientation without regard to scale direction Once the meter is permanently installed the guard scale can be rotated 360 to optimize readability The unique spring loaded design of this variable area flow meter allows it to be installed in any position including inverted without affecting accuracy An optional inv2. H 0 07 02650 R R JRIR R R R RIR Natural Gas 0 60 0 775 CI C R C R NJ CJ R R Nitrogen N2 0 97 0985 C C RIR RIRI R RI R Oxygen 07 1 10 10499 RIRJR R R RIR RI R Propane CHa 1 57 1 253 RI IRI R RIRIN N R R R Recommended N Not Recommended C Consult Factory Pressure vs Temperature Chart 7000 Stainless Steel 2 6000 u E 5000 Stainless Steel ii oa 4000 z e q Brass fi 3000 Teen Oo o 3 2000 Aluminum 1000 100 200 300 400 500 TEMPERATURE DEGREES F CONTINUOUS TEMPERATURE INTERMITTENT TEMPERATURE Page 11 HEDLAND Flow vs Pressure Drop Air Compressed Gases PRESSURE DROP PSI PRESSURE DROP PSI 10 15 20 FLOW SCFM 25 30 100 150 FLOW SCFM PRESSURE DROP PSI 200 250 In Line Pneumatic Flow Meter Installation amp Maintenance Instructions PRESSURE DROP PSI 0 25 50 75 100 125 150 FLOW SCFM 100 1000 s EMEA n2 e 80 800 a PRESSURE DROP PSI 0 200 400 600 800 1000 FLOW SCFM 200 2200 1500 2000 2500 FLOW SCFM 1 The pressure drop curves are valid for fluids with density and viscosity similar to factory test fluids Fluids especially with higher viscosity than these test fluids will yield a higher pressure drop through the flow meter and piping system per a given flow volume Page 12 A system must have adequate fluidic horsepower available to move the system fluid at a prescribed rate at a p
3. maximum operational reliability avoid installation of elbows valves and or reducers immediately adjacent to the meter inlet Don t Install the meter near fast acting valves Fast acting valves have the potential to create high magnitude hydraulic pressure spikes These spikes can damage the internal components of the meter resulting in inaccuracies or malfunction Don t Allow unidirectional meters to be operated against the direction of the flow arrow The standard flow meter is an unidirectional flow meter The piston acts as a check valve to block flow in the reverse direction This causes an excessive pressure differential which can result in damage to internal meter components Page 5 In Line Pneumatic Flow Meter E Installation amp Maintenance Instructions Installing the Flow Meter 1 Mount the meter so fluid is traveling in the direction of the flow arrow See Figure 3 2 Select a mounting location that is suitable for viewing and product service To connect the flow meter into the piping system Place wrench on meter flats on the same side place an open ended wrench onto the plumbing is being tightened flow meter wrench flats adjacent to the pipe connection being installed DO NOT wrench on the opposite end of the flow meter or leakage may result See Figure 4 3 After installation rotate meter by hand to view flow scale See Figure 5 Flow Direction Never place wrench on meter flats opposite A
4. rll ost LLY 8191 Y S10d Page 14 Form HLIT 208 2G 11 10 In line Pneumatic Flow Meter A Installation amp Maintenance Instructions Test Kits A B B C D Nominal Length Length Width Depth Port Size in mm in mm in mm in mm SAE 10 SAE 12 12402 1 GA 16 175 48 1 SAE 20 20662 27500 19 SAE 24 20501521 206 52 m B1 Ref Dim 7 Return Goods Authorization When returning equipment for service a Returned Goods Authorization RGA number must be obtained from our Service Department Please contact them by phone at 800 433 5263 or 262 639 6770 or by e mail to hedlandsales racinefed com All returns go to the following address and must include the RGA number on the outside of the box Hedland Division of Racine Federated Inc 8635 Washington Avenue Racine WI 53406 3738 USA Attn RGA xxx xxxx Form HLIT 208 2G 11 10 Page 15 In line Liquid Flow Meter E Installation amp Maintenance Instructions LIMITED WARRANTY and DISCLAIMER Hedland Division of Racine Federated Inc warrants to the end purchaser for a period of one year from the date of shipment from the factory that all flow meters manufactured by it are free from defects in materials and workmanship This warranty does not cover products that have been damaged due to misapplication abuse lack of maintenance or improper installation Hedland s o
5. 208 2G 11 10 Page 9 HEDLAND VI MAINTENANCE A WARNING Before attempting to remove the flow meter from the line check the system to confirm that line pressure has been reduced to zero PSI Failure to follow these instructions could result in serious personal injury or death and or damage to the equipment 1 Remove the flow meter from the line Remove excess piping from meter NOTE It is not necessary to remove the transparent dust guard from the meter to remove the meter from the line If you choose to remove the dust guard assembly refer to Removal of Dust Guard section 2 Thoroughly wipe off the entire flow meter surface using mild detergent or isopropyl alcohol A CAUTION Do not use aromatic hydrocarbons halogenated hydrocarbons ketones or ester based fluids on polycarbonate lens Failure to follow these instructions could result in damage to the meter 3 Remove the inlet cap from the flow meter noting the sequence of disassembly for later reference during reassembly 4 The internal parts are secured with a retaining ring Remove the retaining ring and the internal wetted parts from the flow meter NOTE If internal parts do not slide freely from flow meter use a wooden dowel inserted into the outlet port of the meter to push parts out Page 10 In Line Pneumatic Flow Meter Installation amp Maintenance Instructions 5 Place all parts on a clean work surface Clean and ins
6. 2G 11 10 Page 3 HEDLAND IV INSTALLATION In Line Pneumatic Flow Meter Installation amp Maintenance Instructions A CAUTION This product should be installed and serviced by technically qualified personnel trained in maintaining industrial class flow instrumentation and processing equipment A CAUTION Read instructions thoroughly before installing the unit If you have any questions regarding product installation or maintenance call your local supplier for more information A CAUTION This meter may contain residual amounts of test fluid at the time of shipment This fluid should be removed prior to installation as the fluid may be incompatible or hazardous with some liquids or gases Failure to follow these instructions could result in damage to the equipment Ay CAUTION A line snubber is recommendedforapplications in which rapid valve actuation or pulsation is anticipated This not only reduces the risk of decoupling the flow meter s magnetic piston it also reduces excessive wear on other components in the system Compressiblity of Gases A CAUTION This standard meter is unidirectional Attempts to flow fluids in the opposite direction of the flow arrow will result in the meter acting as a check valve creating a deadheading situation If the differential pressure magnitude is great enough damage to the internal parts of the meter will result Since gases are si
7. Pressure Flow Scales The in line pneumatic flow meter is offered with a multi pressure flow scale to visually indicate air flow rates in standard cubic feet per minute scfm at 1 0 s g 70 F at 100 psi or liters per second l sec at 1 0 s g 21 C at 6 9 bar The multi pressure scale design allows for use at line pressures from 40 to 130 psi in 10 psi increments 3 0 to 9 0 bar in 1 bar increments This configuration requires that a pressure gauge be installed at the meter inlet The operator reads the inlet gauge pressure selects the appropriate vertical line or interpolated value closest to the gauge reading and follows the line until itintersects the brightly colored horizontal indicator bar The flow rate is read by taking the intersection points following the slope of the closest diagonal line to a scale value and interpolating the scfm l sec flow rate No further calculations are required See Figure 8 e 70 F SSURE PSIG Si HREAG HORIZONTAL INDICATOR BAR FIGURE 8 Multi Pressure Flow Scale Page 8 In Line Pneumatic Flow Meter Installation amp Maintenance Instructions Single Pressure Flow Scales An optional single pressure flow scale is available in U S or metric units This graduated scale is calibrated for air in standard cubic feet per minute scfm at 1 0 s g 70 F at 100 psi or liters per second l sec at 1 0 s g 21 C at 6 9 bar See Figure 9 A s
8. SS T303ss Guard Viton Polycarbonate Pressure Drop See Appendix for specific meter information Accuracy 2 of full scale Repeatability 1 Threads e SAE J1926 1 NPTF ANSI B2 2 BSPP ISO1179 BSPT BS21 Test Kit Pressure Gauge Glycerin Dampened 0 160 psi 0 10 bar Test Kit Load Valve e Ball valve with chrome plated brass ball and Teflon seals Dimensions See Appendix Indicator amp Internal Magnet Guard Seal Bumper Scale Support Retaining Retaining Ring Spring End Caps 6063 16 Pie Aluminum T316SS PPS Ceramic BunaN Nylon ST 13 Inch models have Celcon piston piston ring 3 Inch models not available in T303SS Caustic and Corrosive Air and Gases Standard Model Pressure Fasteners Seals Spider Plate m Body Piston Cone Spring T316SS T316SS T316SS T316SS Viton Polycarbonate Retaining Retaining indicator amp Guard Scale Rin Sprin Internal Seal Bumper Support g pring Magnet p pp T316SS T316SS PPS Ceramic BunaN 6063716 Nylon ST Aluminum Caustic and Corrosive Air and Gases Hostile Environment Model Pressure Fasteners Seals Spider Body Plate Piston Cone Spring T316SS T316SS T316SS T316SS Viton Guard Cylindrical Pyrex Glass Scale Support Retaining 3 Internal Spring Retaining Bumper Indicator amp Ring T316SS T316SS T316SS T316SS T316SS Form HLIT 208
9. bligation under this warranty is limited to the repair or replacement of a defective product at no charge to the end purchaser if the product is inspected by Hedland and found to be defective Repair or replacement is at Hedland s discretion A returned goods authorization RGA number must be obtained from Hedland before any product may be returned for warranty repair or replacement The product must be thoroughly cleaned and any process chemicals removed before it will be accepted for return The purchaser must determine the applicability of the product for its desired use and assumes all risks in connection therewith Hedland assumes no responsibility or liability for any omissions or errors in connection with the use of its products Hedland will under no circumstances be liable for any incidental consequential contingent or special damages or loss to any person or property arising out of the failure of any product component or accessory All expressed or implied warranties including the implied warranty of merchantability and the implied warranty of fitness for a particular purpose or application are expressly disclaimed and shall not apply to any products sold or services rendered by Hedland The above warranty supersedes and is in lieu of all other warranties either expressed or implied and all other obligations or liabilities No agent or representative has any authority to alter the terms of this warranty in any way 8635 Wash
10. connected to flexible hose the end connected with the flexible hose must be rigidly mounted Do Use Teflon tape for sealing NPT fitting Do Install unions Install a union near the inlet or outlet of the meter This will facilitate quick easy meter removal and inspection during periodic maintenance procedures Do Mount the meter either horizontally or vertically flow arrow pointing to either side or straight up If the meter must be mounted inverted special inverted scales are available from the factory Do Ensure the fluid is traveling in the direction of the flow arrow Figure 3 on page 6 Form HLIT 208 2G 11 10 Do Use at least a 200 mesh 74 micron filter The meter will allow particulate to pass that would jam most valves and flow controls Systems that do not have filtration should be equipped with at least a 200 mesh 74 micron filter Most systems already have much finer filtration Dirt ferrous metal or sealing agents such as Teflon tape may lodge and cause malfunction If the meter is jammed at a fixed position follow cleaning and maintenance instructions Don t Use thread locking compounds as thread sealant Don t Install the flow meter near turbulence producing fittings such as elbows reducers close coupled valves etc The in line flow meter does not require flow straighteners or special lengths of straight inlet outlet piping to stabilize turbulent flow patterns However to assure
11. e magnet and the external indicator ring If the system permits simply change flow rate from no flow to full flow allowing the moving piston to magnetically re couple to the indicator ring For rigorous cyclical applications where de coupling may occur frequently consult the technical services staff for further recommendations Test Kit Maintenance Load Valve If the valve fails to load the system remove the valve body and check for foreign material worn parts or seals Flow The absence of any flow reading may indicate a seized piston assembly Remove any material that may be preventing the piston to slide If the Test Kit still fails to indicate flow it is recommended to return the Test Kit to the factory For return procedures see the Return Goods Authorization section of this manual on page 15 Form HLIT 208 2G 11 10 Vil APPENDIX Fluid Selection Chart Internal Body Gul Dust Material pressure Guard Seals Fluid Specific Correction Gravity Factor of g Standard E 3 Scale E 3 3 t d z z amp pe P amp z B E Air 1 00 100 R R R R RI RIR R R Argon A 1 38 1 175 RIRIR R R R R R R Carbon Dioxide CO 1 53 1230 R R R R RIRI R RIR Freon 11 CCI3F 4 92 2218 IRIR RIR RI IR R R R Freon 12 CCLF 4 26 2000 R R IRI RI R R R R R Helium HE 0 14 0 374 RIR R R R R R R R Hydrogen
12. erted scale is available for these applications Aluminum models are offered as a rugged low cost flow meter for monitoring noncorrosive pneumatic systems under operating pressures up to 1000 psi 69 bar 250 psi 17 bar for 3 models and 600 psi 41 bar for test kits Brass meters are recommended for applications with operating pressures up to 1000 psi 69 bar where corrosion inhibitors are not present Stainless Steel is available for monitoring systems operating at pressures up to 1500 psi 103 bar The all T316 stainless steel models are recommended for monitoring caustic or corrosive gases such as hydrogen chloride or sulfur dioxide The T303 stainless steel test kit is rated to 600 psi 41 bar presure rating is limited by the valve For further construction material information see Fluid Selection Chart in the Appendix Page 1 HEDLAND Il OPERATING PRINCIPLE The Flow Meter is a variable area instrument A sharp edged Orifice located within the Piston Assembly forms an annular opening with the contoured Metering Cone The piston assembly carries a cylindrical PPS Ceramic Magnet that is magnetically coupled to an external Indicating MagnetO which moves precisely in direct response to movement of the piston A calibrated Spring amp opposes flow in the forward direction Guard DOrfice Flow Indicator Body 8 Retaining Ring 43 End Cap In Line Pneumatic Flow M
13. eter Installation amp Maintenance Instructions The Hedland variable area flow meters are the most readable products in their class Brightly colored indicators move over the graduated linear Flow Scale which contains bold easy to read numeral and gauge marks The enhanced resolution virtually eliminates parallax problems associated with competitive direct reading flow meters Guard Seal Bumper Flow Scale 6 Spring 2 Piston Assembly Internal Magnet Metering Cone Spider Plate 2 End Fitting Wave Spring Pressure Seal Page2 Form HLIT 208 2G 11 10 HEDLAND In line Pneumatic Flow Meter Installation amp Maintenance Instructions Ill SPECIFICATIONS Temperature Range e Standard 20 to 240 F 29 to 116 C e Hostile Environment 20 to 400 F 29 to 205 C Continuous 400 to 500 F 205 to 260 C Intermittent See Appendix for Pressure vs Temperature correlation information Pressure Rating 10 1 safety factor e Aluminum Brass Models 1000 psi 69 bar maximum 3 Sizes 250 psi 17 bar maximum e Stainless Steel Models 1500 psi 103 bar maximum e Test Kit Models Aluminum Brass SS 600 psi 41 bar maximum Materials of Construction Basic Flow Meters and Test Kits Pressure Spider Fasteners Seals Body Plate Piston Cone Spring 2024 1351 Anodized Alumininum C360 Brass 2024 T351 Anodized Alumininum T316SS T302SS T303
14. gnificantly compressible the density of any compressed gas will vary according to changes in operating pressure levels In other words volumetric flow rates will vary significantly with changes in line pressure Therefore pneumatic flow meters should be installed with a pressure gauge located as close as possible to the inlet port The psig range capacity of this pressure gauge should be at least 125 of the anticipated pressure in the system or be suitable for the maximum expected line pressure if higher For example if the anticipated operating pressure is 100 psig a pressure gauge with a capacity of at least 125 psig should be installed as close as possible to the inlet port Page 4 Form HLIT 208 2G 11 10 HEDLAND In line Pneumatic Flow Meter Installation amp Maintenance Instructions Installation Recommendations The in line flow meter is a simple device to install However the following measures are recommended for reliable trouble free operation Do Align pipe accurately Piping should be accurately aligned and of correct length The high pressure body of the flow meter can withstand shock and flow pressure pulsation However the piping should be firmly supported by external mounting brackets both upstream and downstream of the meter to avoid any pipe flexing actions that could reduce meter life Do Use rigid mounting If the flow meter inlet or outlet are to be rigidly mounted and the opposing port is to be
15. ington Avenue Racine WI 53406 3738 USA Telephone 262 639 6770 or 800 HEDLAND Fax 262 639 2267 or 800 CHK FLOW e Www hedland com hedlandsales racinefed com Materials amp specifications are subject to change without notice DIVISION OF RACINE FEDERATED INC HEDLAND is a registered trademark of Racine Federated Inc VITON is a registered trademark of DuPont Dow Elastomers CELCON is a registered trademark of Hoeschst Celanese Corporation PYREX is a registered trademark of Corning Glass Works Corporation TEFLON is a registered trademark of E l du Pont de Nemours and Company UL is a registered trademark of Underwriters Laboratories RFID Racine Flow Meter Group ERIS DYNASONICS Flo tech EDLAND PRESO racine Form HLIT208 2G 11 10 2010 Racine Federated Inc Printed in USA
16. pect all parts Replace any that appear worn or damaged Check inlet port O ring for damage and replace if required AV CAUTION Field replacement of the spring metering cone and or piston magnet assembly may result in changes to the calibration of the flow meter 6 Reassemble spring then piston magnet assembly and retaining ring into flow meter 7 Install metering cone spider plate assembly retaining spring and secure with inlet cap 8 Reinstall meter to the line Removal of Dust Guard To remove the dust guard for cleaning or replacement simply loosen the end fitting located at the bottom of the meter and slide the end cap dust bumper and the dust guard off the bottom of the meter taking care to avoid damaging the O ring seal between the end cap and the dust gland Quick Re Coupling This piston type variable area flow meter is inherently less sensitive to shock and vibration than other variable area designs The unique magnetic coupling also eliminates the need for mechanical linkages that can wear or loosen over the functional life of the meter However on occasion a pressure spike or extreme flow surge can cause the piston to Form HLIT 208 2G 11 10 HEDLAND In line Pneumatic Flow Meter Installation amp Maintenance Instructions move at such rapid speed that it disconnects the piston magnet and the external indicator ring If this occurs use one of these procedures to re couple th
17. ressure adequate to overcome all pressure reducing devices including the flow meter Form HLIT 208 2G 11 10 HEDLAND In line Pneumatic Flow Meter Installation amp Maintenance Instructions Air Compressed Test Kits Air Caustic and Corrosive Gases Form HLIT 208 2G 11 10 PRESSURE DROP PSI PRESSURE DROP PSI PRESSURE DROP PSI PRESSURE DROP PSI 20 PNEU 10 15 FLOW SCFM 20 25 30 25 n2 a zi en 100 150 FLOW SCFM 200 250 20 5 PNEU 10 15 FLOW SCFM 20 100 150 FLOW SCFM 200 250 PRESSURE DROP PSI 0 25 50 T5 100 125 150 FLOW SCFM 1 4 1 12 g P 20 o 74 al ul oc 21 o 7 E a 0 200 400 600 800 1000 FLOW SCFM 20 o5 a a o E 10 W oc E o5 ul 4 a 0 0 25 50 75 100 125 150 FLOW SCFM 30 100 1000 EMEA g EU 2 G 15 z 210 o co a 0 200 400 600 800 1000 FLOW SCFM Page 13 In Line Pneumatic Flow Meter E Installation amp Maintenance Instructions Dimensions Standard Meters VY to 1 2 inch models Ss ues ees nen ted Nominal Length Length Width Depth Port Size in mm in mm in mm in mm 890 26 206 652 206 53 Standard Meter Standard Meter with EP amp EG Option 3 inch SAE NPTF BSPT models Inches mm Sje J SSOIDY FP
18. rrow plumbing being tightened Figure 4 Installing Meter Figure 3 Flow Direction Arrow Never use wrench to rotate meter body when viewing flow scale Figure 5 Rotating Meter Page 6 Form HLIT 208 2G 11 10 In line Pneumatic Flow Meter A Installation amp Maintenance Instructions Installing the Test Kit Flow Meter 1 Mount the VA High Pressure Test Kit Flow Meter so fluid is traveling in the direction of the flow arrow See Figure 3 on page 6 2 Install the test kit at any location in the pneumatic circuit that is suitable for viewing To connect the test kit into the piping system place an open ended wrench onto the test kit extended cap on the inlet side or on the test kit wrench flat on the outlet side adjacent to the pipe connection being installed DO NOT wrench on the opposite end of the test kit or leakage may result See Figure 6 Place wrench on valve body on the same side plumbing is being tightened Or use quick disconnect couplings for easy connections and to keep the test kit sealed and clean when not in use 3 After installation rotate meter by hand to Figure 6 Installing Test Kit view flow scale See Figure 7 Never place wrench on valve body opposite plumbing being tightened Never use wrench to rotate meter Figure 7 Rotating Test Kit Form HLIT 208 2G 11 10 Page 7 HEDLAND IV OPERATION Multi
19. rt can also be used to correct adjust the Multi Pressure Flow Scale to indicate flow rates in applications beyond the parameters stated on the scale To adjust for Pressures beyond above or below scale limits 1 Locate point at which the brightly colored indicator line intersects the vertical 100 psig pressure line 2 Divide this reading by the Pressure Correction Factor fj indicated in the conversion Chart To adjust for changes in Temperature 1 Divide the 100 psig flow rate reading by Temperature Correction Factor f To adjust for changes in Specific Gravity 1 Establish the square root of the new specific gravity 2 Divide the 100 psig flow rate reading by the Specific Gravity Correction Factor fs DETERMINE FLOW RATES USING DIFFERENT PRESSURE amp TEMPERATURES scfm actual scfm indicated 1 2 Where f Conversion factor for inlet pressure f Conversion factor for temperature f 2 Conversion factor for specific gravity TABLE 1 PRESSURE CORRECTION FACTOR f Operating Pressure m os sm bar kPa 172 517 f 13 8 15 5 see 1147 f qf UM f 14 7 psig 7 914 1 014 bar f 790 857 1 101 357 kPa 981 21 0 F E f oe s roo ime sem es iem ee ue f 460 F A 460 F _ 530 f 273 C 3 _273 C 293 TABLE 3 SPECIFIC GRAVITY CORRECTION FACTOR f3 f 4 SP GR FIGURE 10 Conversion Chart Form HLIT
20. tandard cubic foot of air is defined as a cubic foot of air at 70 F at atmospheric pressure 14 7 psia at sea level Since it is impossible to flow air at standard conditions the scale is calibrated for an inlet condition of 100 psi 6 9 bar at 70 F 21 C A correction factor must be calculated to determine the actual air volume Each meter is supplied with the Conversion Chart shown in Figure 10 SCFM 100 PSIG 70 F FIGURE 9 Single pressure Flow Scale Application Information Compressibility of Gases Since gases are significantly compressible their density varies with pressure and temperature Tables 1 amp 2 of the Conversion Chart are used to convert indicated scfm flow rates to actual scfm flow rates for your application Form HLIT 208 2G 11 10 HEDLAND In line Pneumatic Flow Meter Installation amp Maintenance Instructions Effects of Specific Gravity Standard scales are calibrated for air with a specific gravity of 1 0 Table 3 of the Conversion Chart is used to calculate actual scfm flow rates of gases with a specific gravity other than 1 0 Conversion Chart The Conversion Chart provides a series of simplified mathematical formulas to correct the graduated scale for changes in pressure Table 1 temperature Table 2 and or specific gravity Table 3 Special scales can be made to accommodate other pressures temperatures and specific gravity The Conversion Cha
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