HP Series - Hoffer Flow Controls, Inc
Contents
1. INSERT INCHES REQUIRED ADJUSTABLE OR FIXED STEM MODEL HP B C X X XC X C XX OPTION AL ADJUSTABLE LOW PRESSURE 150 MAX AH ADJUSTABLE HIGH PRESSURE DEPENDENT UPON F FIXED SPECIAL FEATURES MODEL HP B XC XC XC XC XC XE OPTION CE CE MARK REQUIRED FOR EUROPE THE HOUSING TO MEET PED REQUIREMENTS SEP CE SOUND ENGINEERING PRACTICE SP ANY FEATURES THAT ARE NOT COVERED IN THE MODEL NUMBER USE A WRITTEN DESCRIPTION OF THE SP HP 208 Page 4 of 17 HP Insertion Meter MODEL NUMBER DESIGNATION GAS HP INSERTION GAS TURBINE SERIES MODEL HP B B C D E JE G 1 ROTOR SIZE BLADE ANGLE ASSIGNED BY TPC DETERMINED BY GAS DENSITY PROCESS CONNECTION END FITTING BEARING TYPE PICKUP COILS EXPLOSION PROOF COIL JUNCTION ENCLOSURES BI DIRECTIONAL FLOW STEM LENGTH ADJUSTABLE OR FIXED STEM SPECIAL FEATURES ROTOR SIZE MODEL HP B A C FC XC XC XC OPTION 11 2 11 2 ROTOR 2 2 BLADE ANGLE MODEL 8 X X X X X BLADE ANGLE ASSIGNED BY TPC DETERMINED BY GAS DENSITY AND FLOW RANGE PROCESS CONNECTION END FITTING TYPE MODEL FC XC XC XC 2 OPTION QNPT 2 MALE NATIONAL PIPE THREAD 3NPT 3 MALE NATIONAL PIPE THREAD NOTE ALL S S FLANGES ARE 3161 S S DUAL RATED UNLESS OTHERWISE SPECIFIED BEARING TYPE MODEL HP B KO XC TURBINE SIZES OPTION 12. frequency is the direction of flow The velocity may be obtained from the magnitude of the frequency output as this relates to the feet per second calibration of the well assembly As the well assembly is inserted into the pipe the velocity profile may be measured to determine the mean velocity point HP 208 Page 1 of 17 HP Insertion Meter MODEL NUMBER DESIGNATION LIQUID HP INSERTI ON LI QUI D TURBI NE SERI ES MODEL HP B 4 B C 0 E F CO CC XC CE ROTOR SIZE MINIMUM FLOW RATE IN MAXIMUM FLOW RATE IN FPS PROCESS CONNECTION END FITTING PICKUP COILS BEARING TYPE EXPLOSION PROOF COIL JUNCTION ENCLOSURES BI DIRECTIONAL FLOW STEM LENGTH ADJUSTABLE OR FIXED STEM SPECIAL FEATURES ROTOR SIZE MODEL HP B A C XC XC X X XX OPTION 11 2 11 2 ROTOR 2 2 ROTOR MINIMUM FLOW AND MAXIMUM FLOW RATE IN FPS MODEL KC X MINIMUM FLOW RATE IN FPS MAXIMUM FLOW RATE IN FPS PROCESS CONNECTION END FITTING TYPE MODEL HP B OO X X XX X OPTION QNPT 2 MALE NATIONAL PIPE THREAD 3NPT MALE NATIONAL PIPE THREAD NOTE ALL S S FLANGES 3161 5 5 DUAL RATED UNLESS OTHERWISE SPECIFIED BEARING TYPE MODEL HP B HEH X X X X TURBINE SIZES_ OPTION 11 2 CB CERAMIC HYBRID BALL BEARING SELF LUBRICATING C HARD CARBON COMPOSITE SLEEVE BEARING T TUNGSTEN CARBIDE SLEEVE BEARING 27 CERAMI
3. locate the appropriate manual s and or drawing s Identify all model numbers exactly before making any connections A number of options and accessories may be added to the main instrument which are not shown on the basic user wiring Consult the appropriate option or accessory user manual before connecting it to the system In many cases a system wiring drawing is available and may be requested from HOFFER FLOW CONTROLS This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of HOFFER FLOW CONTROLS INC HOFFER FLOW CONTROLS policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering The information contained in this document is subject to change without notice Return Requests Inquiries Direct all warranty and repair requests inquiries to the Hoffer Flow Controls Customer Service Department telephone number 252 331 1997 or 1 800 628 4584 BEFORE RETURNING ANY PRODUCT S TO HOFFER FLOW CONTROLS PURCHASER MUST OBTAIN A RETURNED MATERIAL AUTHORIZATION RMA NUMBER FROM HOFFER FLOW CONTROLS CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned RMA number should then be marked on the outside of the return package and on any correspondenc
4. 00 2 806 4 811 6 813 8 816 1x 10 818 2 827 4 837 6 841 8 847 1 x 10 849 2 865 4 865 HP 208 Page 16 of 17 HP Insertion Meter Table C Insertion Depth and Obstruction Factor Chart Nominal Pipe ID Insertion Depth Obstruction Factor inches inches OF 3 1 5 8245 4 2 0 8590 3 5 2 5 8827 6 3 0 8998 8 4 0 9225 10 5 0 9369 10 1 25 9876 12 1 50 9890 14 1 75 9902 16 2 00 9912 S 18 2 25 9920 Z 20 2 50 9927 on S 24 3 00 9937 gt lt 30 3 75 9949 36 4 50 9957 42 525 9962 48 6 00 9967 NOTE 1 Approximate insertion depth calculated by Medium Diameter Pipe Large Diameter Pipe 10 inches and less greater than 10 inches Centerline Average Velocity Depth 120 5 x ID 120 125 x ID 2 Obstruction factor calculated by 10625 x I 0 3535 ol 2 ID inside diameter of pipe inches I insertion depth in inches OF 1 Where HP 208 Page 17 of 17 HP Insertion Meter
5. 1 2 CB CERAMIC HYBRID BALL BEARING SELF LUBRICATING 27 CB CERAMIC HYBRID BALL BEARING SELF LUBRICATING HP 208 Page 5 of 17 HP Insertion Meter PICKUP COILS MODEL HP B OPTION IM IMC3PA IMC2PAHT IHTM ISM IISM ATEX IRPM gt OGO IRPRXXX IDMXXXX IDRXXXX FC HE CX CX ONE MAG COIL ONE RF COIL ONE HIGH TEMP 6 PIGTAIL RF COIL HIGH TEMP MAG COIL ONE INTRINSICALLY SAFE MAG COIL NORTH AMERICA ONE ISM ATEX COIL ONE REDI PULSE MAG COIL ONE REDI PULSE RF COIL ONE REDI PULSE INTRINSICALLY SAFE MAG COIL ONE REDI PULSE INTRINSICALLY SAFE RF COIL EXPLOSION PROOF COIL JUNCTION ENCLOSURES MODEL HP B OPTION E2 X ATEX E2 E2 NOTES HP 208 EDE XXX E2 ENCLOSURE 3 4 MNPT RISER WITH E2 ENCLOSURE EXPLOSION PROOF FLAME PROOF ENCLOSURE WITH 3 4 FNPT MOUNT AND 3 4 CABLE ENTRY FM CLASS I DIV 1 GR ABCD CLASS DIV 1 GR EFG TYPE 4X CSA CLASS I DIV 1 GR ABCD CLASS II DIV 1 GR EFG CLASS TYPE 4X EX D IIC CLASS I ZONE 1 IP 66 ATEX EXII2GD Ex d tD IIC IP66 68 IEC EX D IIC IP68 Page 6 of 17 HP Insertion Meter BI DIRECTIONAL FLOW MODEL HP B XC KC HEH M OPTION BP BI DIRECTIONAL FLOW REQUIRES THE 2 ROTOR AND 3 END FITTING OPTIONS ABOVE STEM LENGTH MODEL HP B X X XGCOX X OPTION INSERT INCHES REQUIRED ADJUSTABLE OR FIXED STEM MODEL HP B FC XC XC XC XC XCX OPTION AL ADJUSTA
6. BLE LOW PRESSURE 150 MAX AH ADJUSTABLE HIGH PRESSURE DEPENDENT UPON F FIXED SPECIAL FEATURES MODEL HP B 4 X XC X XC X X J OPTION CE CE MARK REQUIRED FOR EUROPE AND TEMPERATURE MUST BE KNOWN AND ENTERED ON THE ORDER THIS INFORMATION WILL BE MARKED ON THE HOUSING TO MEET PED REQUIREMENTS SEP CE SOUND ENGINEERING PRACTICE SP ANY FEATURES THAT ARE NOT COVERED IN THE MODEL NUMBER USE A WRITTEN DESCRIPTION OF THE SP HP 208 Page 7 of 17 HP Insertion Meter PRINCIPLE OF OPERATION The HP Series Profile Insertion Flowmeter is a velocity measuring turbine type flowmeter The flowing fluid engages the vaned rotor causing it to rotate at an angular velocity proportional to the fluid flow rate The angular velocity of the rotor results in the generation of an electrical signal AC sine wave type Summation of the pulsing electrical signals relates directly to the total flow The frequency of the signal relates directly to the flow rate The vaned rotor is the only moving part of the flowmeter ELECTRICAL DESCRIPTION The pickup coil furnished with the flowmeter is a sensing device that converts the motion of the rotating rotor into essentially an AC sine wave Pickup Coil The variable reluctance pickup contains a permanent magnet and associated wire wound coil and the modulated carrier pickup contains an oscillator and associated wire wound coil For both coil types the movement of the of the rotor blad
7. C HYBRID BALL BEARING SELF LUBRICATING HARD CARBON COMPOSITE SLEEVE BEARING T TUNGSTEN CARBIDE SLEEVE BEARING HP 208 Page 2 of 17 HP Insertion Meter PICKUP COILS MODEL HP B4 OPTION 1M 2 1ISM IRPMXXX IRPRXXX 1IDMXXXX IDRXXXX O O H IISM ATEX ONE ISM ATEX COIL XC FEX M XX X NE MAG COIL NE RF COIL NE HIGH TEMP 6 PIGTAIL RF COIL IGH TEMP MAG COIL NE INTRINSICALLY SAFE MAG COIL NORTH AMERICA NE REDI PULSE MAG COIL NE REDI PULSE RF COIL NE REDI PULSE INTRINSICALLY SAFE MAG COIL NE REDI PULSE INTRINSICALLY SAFE RF COIL EXPLOSION PROOF COIL JUNCTION ENCLOSURES MODEL HP B OPTION C XC FC XS X XX E2 E2 ENCLOSURE X ATEX E2 3 4 MNPT RISER WITH E2 ENCLOSURE E2 NOTES EXPLOSION PROOF FLAME PROOF ENCLOSURE WITH 3 4 FNPT MOUNT AND 3 4 CABLE ENTRY FM CSA ATEX TEC CLASS I DIV 1 GR ABCD CLASS IVIIL DIV 1 GR EFG TYPE 4X CLASS I DIV 1 GR ABCD CLASS II DIV 1 GR EFG CLASS III TYPE 4X EX D IIC CLASS I ZONE 1 IP 66 EX II 2GD Ex d tD IIC IP66 68 EX D IIC IP68 FOR UL LISTED ENCLOSURE CONTACT FACTORY BI DIRECTIONAL FLOW MODEL OPTION BF B I DIRECTIONAL FLOW REQUIRES THE 2 ROTOR AND 3 END FITTING OPTIONS ABOVE HP 208 Page 3 of 17 HP Insertion Meter STEM LENGTH MODEL HP B FC XC XC XC XO X OPTION
8. HP Series Profile Insertion Flowmeters USER S MANUAL January 2013 H HOFFER FLOW CONTROLS INC Perfecting Measurement 107 Kitty Hawk Lane P O Box 2145 Elizabeth City North Carolina 27906 2145 1 800 628 4584 252 331 1997 FAX 252 331 2886 www hofferflow com Email info hofferflow com NOTICE HOFFER FLOW CONTROLS INC makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose This manual has been provided as an aid in installing connecting calibrating operating and servicing this unit Every precaution for accuracy has been taken in the preparation of this manual however HOFFER FLOW CONTROLS INC neither assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that may result from the use of the products in accordance with information contained in the manual HOFFER FLOW CONTROLS policy is to provide a user manual for each item supplied Therefore all applicab e user manuals should be examined before attempting to install or otherwise connect a number of related subsystems During installation care must be taken to select the correct interconnecting wiring drawing The choice of an incorrect connection drawing may result in damage to the system and or one of the components Please review the complete model number of each item to be connected and
9. ND EXCLUSIVE REMEDY IS THE REPAIR AND OR REPLACEMENT OF NONCONFORMING GOODS AS PROVIDED IN THE PRECEDING PARAGRAPHS HFC SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES HFC 9708 TABLE OF CONTENTS GENERAL DESCRIPTION u Susa ott ee PH E petet HER en noe 1 APPLICATION a pret eet e eene eer Pre rte 1 MODEL NUMBER DESIGNATION LIQUID eee 2 MODEL NUMBER DESIGNATION GAS eee 5 PRINCIPLE OF 8 ELECTRICAL DESCRIPTION esee 8 HP SERIES SPECIFICATION eese 8 INSTALLATION y roit i e ce REO n en PEERS 9 STRAINERS EILTEBRS oorr eorpore a apu sa 10 MAINTENANCE pies ictt tte reete eene in 11 BALL BEARING REPLACEMENT 11 PICKUP COIL REPLACEMENT riisiin nereo riris at ERR a 12 SPARE AND REPLACEMENT PARTS 13 INSERTION DEPTH DETERMINATION esee eene 14 CALIBRATION CONSTANTS DETERMINATION m 14 GENERAL DESCRIPTION The Hoffer HP Series Profile Insertion Flowmeter is designed to measure fluid gas or liquid flow in medium to large diameter pipes and provide an output signal that is proportional to that flow The flowmeter is designed to be installed removed and orientated without interrupting fluid flow in the pipeline A conventio
10. ay be suspect Complete calibrated Well Assemblies are available from Hoffer Flow Controls Inc Consult factory for pricing and availability BALL BEARING REPLACEMENT Remove the meter to a clean flat work surface To disassemble Loosen the stem clamp and carefully slide the housing towards the handle exposing the Well Assembly coil and rotor housing Inspect the rotor and Well for damage bent blades bent damaged Well supports etc All damaged parts must be replaced HP 208 Page 11 of 17 HP Insertion Meter Using for 1 2 meter or 5 16 for 2 meter Spintite remove one shaft locknut Carefully slide the shaft out while supporting the rotor The rotor will drop out once the shaft is removed Remove the deflector cones one from each side of the Well supports Carefully inspect all components replace any that may be worn or damaged To reassemble Install the deflector cones into the Well supports one in each side Insert new ball bearings and shaft bushing into the rotor Position the rotor between the cones making sure that the In side of the rotor faces into the direction of flow Flow direction is marked on the bottom of the Well Assembly Install shaft Install shaft locknut Check that the rotor spins freely Carefully slide the housing over the Well Assembly to the Fully Retracted position as marked on the stem and tighten the clamp PICKUP COIL REPLACEMENT Remove th
11. e FOR WARRANTY RETURNS please FOR NON WARRANTY REPAIRS OR have the following information available CALIBRATIONS consult HOFFER FLOW BEFORE contacting HOFFER FLOW CONTROLS for current repair calibration CONTROLS charges Have the following information 1 P O number under which the product available BEFORE contacting HOFFER 2 Model and serial number of the product 1 P O number to cover the COST of the under warranty and repair calibration 3 Repair instructions and or specific 2 Model and serial number of the product problems relative to the product and 3 Repair instructions and or specific problems relative to the product HFC 9708 Limited Warranty HOFFER FLOW CONTROLS INC HFC warrants HFC s products goods described in the specifications incorporated in this manual to be free from defects in material and workmanship under normal use and service but only if such goods have been properly selected for the service intended properly installed and properly operated and maintained This warranty shall extend for a period of one 1 year from the date of delivery to the original purchaser or eighteen 18 months if the delivery to the original purchaser occurred outside the continental United States This warranty is extended only to the original purchaser Purchaser Purchaser s sole and exclusive remedy is the repair and or replacement of nonconforming goods as provided in the following paragraphs I
12. e across the coil tip produces an AC signal within the coil winding Pickup Coil Output As described above is transmitted by the shielded cable to the electronic instrumentation for proper factoring display and control HP SERIES SPECIFICATION Materials Stem Housing Rotor Support 304 stainless Bearing 440SS shielded ball bearings hard carbon composite tungsten carbide sleeve Rotor 17 4 stainless Standard Nickel 200 430 stainless Seals Rulon Standard Viton Teflon End Fittings Flanged and NPT threaded are available Electrical Connections Terminal block in conduit enclosure Flying leads for preamp or two wire transmitter Pickup Variable reluctance type nominal DC resistance 1300 ohms standard Minimum output level 10 millivolt RMS Modulated Carrier type nominal DC resistance 11 5 ohms Frequency Range 0 to 500 Hz HP 208 Page 8 of 17 HP Insertion Meter INSTALLATION In choosing the location to mount the insertion meter it is recommended that there be 10 to 20 pipe diameters upstream and 5 to 10 diameters downstream This will allow the highest measuring accuracy while tending to minimize swirl Care should be exercised not to locate the HP Series Flowmeter in close proximity to electronically noisy devices which could introduce stray noise into the pickup coil In running the signal cable from the HP Series Flowmeter to the associated electronics care should be take
13. e meter to a clean flat work surface To disassemble Disconnect the coil wires in the conduit enclosure Loosen the stem clamp and carefully slide the housing towards the handle exposing the Well Assembly Carefully unscrew and remove the Well Assembly from the stem pulling the pickup coil wires from the stem Unscrew and remove the pickup coil from the Well Assembly To reassemble Install the new pickup coil into the Well Assembly Replace the O ring Well Assembly seal Route the pickup coil wires through the center of the stem to the conduit enclosure Screw the Well Assembly on the stem tightening until the Well Assembly is parallel with the handle Make sure that the flow direction of the Well Assembly is pointing in the same direction as the handle Carefully slide the housing over the Well Assembly to the Fully Retracted position as marked on the stem and tighten the clamp Reconnect the coil wires in the conduit enclosure HP 208 Page 12 of 17 HP Insertion Meter SPARE AND REPLACEMENT PARTS To assure maximum operating efficiency and minimum downtime it is recommended that the spare parts listed in Table A be stocked Table A Recommended Spare Parts Part Nomenclature Qty Pickup Coil Pickup Coil w leads 1 Well Assembly Seal 2 020 Viton O Ring 1 Bearings Ball Bearing type only 1 set Well Assembly Assembled amp calibrated Well Assembly 1 consisting of rotor shaft cones well assembly frame a
14. ese goods to meet the requirements of any safety code of any state municipality or other jurisdiction and Purchaser assumes all risk and liability whatsoever resulting from the use thereof whether used singly or in combination with other machines or apparatus This warranty shall not apply to any HFC goods or parts thereof which have been repaired outside HFC s factory or altered in any way or have been subject to misuse negligence or accident or have not been operated in accordance with HFC s printed instructions or have been operated under conditions more severe than or otherwise exceeding those set forth in the specifications for such goods THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE HFC SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OR LOSS OF USE OF THE GOODS WITHOUT LIMITING THE GENERALITY OF THE FOREGOING THIS EXCLUSION FROM LIABILITY EMBRACES THE PURCHASER S EXPENSES FOR DOWNTIME OR FOR MAKING UP DOWNTIME DAMAGES FOR WHICH THE PURCHASER MAY BE LIABLE TO OTHER PERSONS DAMAGES TO PROPERTY AND INJURY TO OR DEATH OF ANY PERSONS HFC NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OR USE OF HFC s GOODS AND THERE ARE NO ORAL AGREEMENTS OR WARRANTIES COLLATERAL TO OR AFFECTING THE AGREEMENT PURCHASER S SOLE A
15. luid profile shape as a function of Reynolds Number Table B lists the profile scaling factor derived from one such empirical equation To choose the correct profile scaling factor determine the Reynolds Number corresponding to the anticipated minimum and maximum flow rates using the following equation for Liquid Service for Gas Service Dx4 Rn 3 160 2 fni QxDx zxIDxu where where Q flow in US gallons Q flow rate in SCF sec per minute D density in ft3 ID pipe bore in inches u viscosity in Centistokes u u viscosity of gas in in sec From Table B obtain the profile scaling factors corresponding to the approximate Reynolds Number Calculate the mean profile scaling factor using the following equation PF _ PP vax PF uN AVE 2 HP 208 Page 15 of 17 HP Insertion Meter ID nominal pipe ID in inches An estimate of the error introduced into the indicated flow by the varying flow profile may be made with the aid of the following equation PF uix 2x PF vy ERROR x 100 It may be noted that the percent error will increase as a larger turn down range is sought It is therefore advisable that be chosen to correspond to the actual conditions expected and not on the maximum and minimum capabilities of the Profile Insertion Flowmeter Table B Profile Scaling Factor Chart Reynolds Number Rn Profile Scaling Factor PF 4 x 10 791 6 796 8 797 1 x 10 8
16. n in the choice of layout so as not to introduce noise or crosstalk with other cabling It is advisable not to run the signal cable within a conduit with power lines Shielded cabling is required and should be terminated as specified in the manual for the electronic measurement system See the installation drawings for a typical installation Make sure the riser valve and HP Series Flowmeter have pressure ratings suitable for the desired service conditions before installation begins Also check materials compatibility if the fluid is corrosive The HP Series Profile Insertion Flowmeter is designed to be mounted on a full port valve which is in turn mounted on a riser welded to the pipeline The HP Series Flowmeter may be mounted into an active line using conventional hot tap techniques This allows for the installation of the meter without an interruption of service Weld a short riser with appropriate pressure rating to the pipeline This riser and the full port valve should have the mating fitting required by the HP Series Flowmeter Correct gaskets and bolt types should be utilized At this point a hot tap device is mounted on the valve and a hole made through the pipe wall The hot tap device is retracted and the valve is closed Mount the HP Series Flowmeter to the isolating valve Open the full port valve to its fully open position Insert the HP Series Flowmeter to the desired insertion depth The stem is graduated to aid in posi
17. n the event Purchaser believes the goods are defective the goods must be returned to HFC transportation prepaid by Purchaser within twelve 12 months after delivery of goods or eighteen 18 months for goods delivered outside the continental United States for inspection by HFC If HFC s inspection determines that the workmanship or materials are defective the goods will be either repaired or replaced at HFC s sole determination free of additional charge and the goods will be returned transportation paid by HFC using the lowest cost transportation available Prior to returning the goods to HFC Purchaser must obtain a Returned Material Authorization RMA Number from HFC s Customer Service Department within 30 days after discovery of a purported breach of warranty but no later than the warranty period otherwise such claims shall be deemed waived See the Return Requests Inquiries Section of this manual If HFC s inspection reveals the goods are free of defects in material and workmanship or such inspection reveals the goods were improperly used improperly installed and or improperly selected for service intended HFC will notify the purchaser in writing and will deliver the goods back to Purchaser upon 1 receipt of Purchaser s written instructions and ii the cost of transportation If Purchaser does not respond within thirty 30 days after notice from HFC the goods will be disposed of in HFC s discretion HFC does not warrant th
18. nal hot tap may be used to Install the flowmeter The HP Series Flowmeter consist of a support assembly turbine rotor and pickup coll which provides a pulse output signal that is proportional to the fluid flow The support assembly portion consists of a stem stem housing handle and conduit enclosure The stem is graduated to aid in insertion to the desired depth and has a pickup coil located within its interior The stem housing provides the necessary sealing action The handle is used to align the sense head to the proper orientation The conduit enclosure may be used as a junction box with connections to the turbine flowmeter or alternately as an enclosure for a preamplifier or two wire transmitter APPLICATION The HP Series Profile Insertion Flowmeter responds to the average velocity appearing across the well assembly To accurately measure the flow of fluid in a large diameter pipe it is necessary to locate the well assembly at an insertion depth corresponding to the average velocity When located at a point other than that corresponding to the average velocity a scale factor must be included see Table B The effective area of the pipe as well as other factors must be considered in order to predict the pulses per unit volume of the flow metering section Since the axis of the rotor may be moved with the handle it is possible to obtain information on the swirl present in the pipe The orientation that produces the maximum output
19. nd O ring seal NOTE Recommended spare parts lists should not be construed as an indication of possible failure but reflect material available only Jrom the manufacturer or his authorized representative Spare parts are recommended for a normal operating period of 18 months Quantity of recommended spares is based upon a single unit at any given location and provisioning may be adjusted accordingly in the event that multiple units comprise a system HP 208 Page 13 of 17 HP Insertion Meter INSERTION DEPTH DETERMINATION A review of the principles of fluid flow in pipelines reveals that the velocity of the fluid across the pipe is not constant Under a given set of conditions a flow profile exists which varies from a parabolic shape in laminar flow to approximately flat in the turbulent flow region It is the average flow in the pipeline which is of interest in obtaining a measurement of flow in the pipe For medium diameter pipes diameters of 10 inches and less the turbine is positioned at the center of the pipe Center line positioning is recommended to avoid the effects of stagnant flow near the pipe wall and the turbulence of fluid near the riser For large diameter pipes diameters greater than 10 inches the turbine is positioned at the depth where the flow equals the average fluid velocity of the flow Table C lists the required insertion depth for selected pipe diameters CALIBRATION CONSTANTS DETERMINATION Calibration of the me
20. tamination of the rotor may occur if foreign matter succeeds in wrapping itself about the well assembly This is easily removed The turbine rotor should be checked for obvious damage 1 bent blades shaft etc If no damage is apparent and the rotor spins freely it may be returned into service The types of bearings installed in the flowmeter have been selected to operate in the type of service being metered It is recommended that the bearings be checked periodically for wear Since the type of fluid being measured as well as temperature have a direct relationship on the bearing life expectancy it is best to contact the HFC Engineering Department for the proper preventive maintenance interval If the rotor wobbles on the shaft bearing wear is indicated and necessitates replacement If the rotor fails to spin freely the bearings may be suspected Ball bearings may be replaced in the field all others should be returned to factory for rework and recalibration It is recommended that the bearings be replaced if any signs of wear are apparent An unexplained shift in the output accuracy could be a sign of worn bearings CAUTION If bearings are allowed to operate without replacement at the recommended interval the accuracy of the device may drift from the original calibration and if left long enough severe damage to the rotor may occur Should the unit fail to produce an output signal while the rotor is spinning the pickup coil m
21. tering section consists of relating the precise velocity measurement at the specified insertion depth to the geometry of the piping to obtain a measurement of the entire flow through the metering section Calculate the calibration constant for the metering section using the following equation K K Pulses MS PF x OF 42 ue 24 K F zm Hz Min where K KFACTOR from calibration sheet Hz FPS PF Mean Profile Scaling Factor equal to 1 for large diameter pipes OF Obstruction Factor ID Inner diameter of pipe inches HP 208 Page 14 of 17 HP Insertion Meter A consequence of using center line positioning in medium diameter pipes is that a scaling factor relating the average flow to the center line flow must be included in determining the calibration constant of the metering section In general the profile scaling factor PF relates to the shape of the velocity profile under a given set of fluid conditions i e Reynolds Number Rn In large diameter pipes the profile scaling factor PF is equal to one since the turbine is located at the average velocity point It is necessary to consider the effects of the flow profile PF within the line as well as the obstruction that the stem and well assembly present to the fluid flow OF The profile scaling factor may be obtained from measured data or by utilizing empirical equations derived from fluid mechanics of the f
22. the pipe wall Due to profile effects a scaling factor must be used with center positioning It should be noted that the turbine rotor responds to the average velocity appearing across its surface While the mean velocity depth may vary it will often remain within the diameter of the turbine rotor and thereby minimize the affects of not being exactly at the mean velocity depth STRAINERS FILTERS Profile Insertion flowmeters are designed for use in a clean fluid service However the service fluid may carry some particulate material which would need to be removed before reaching the flowmeter Under these conditions a strainer filter may be required to reduce the potential hazard of fouling or damage that may be caused by foreign matter Strainer filters are recommended to be used with the Hoffer Mini Flow Series meters METER SIZE MESH SIZE Mann a MF Series 100 0055 V4 to V2 100 0055 5f to 1347 70 008 1 to 3 40 015 4 to 12 24 028 If a strainer filter is required in the system it should be located upstream of the flowmeter taking care that the proper minimum distance is kept between the strainer and flowmeter HP 208 Page 10 of 17 HP Insertion Meter MAINTENANCE The field maintenance of the HP Series Flowmeter is limited to inspection and or replacement of a few components In general it is advisable to remove the insertion meter from the line on a periodic basis and examine it for contamination and wear Con
23. tioning to the desired depth NOTE A swirl present in the fluid ahead of the meter can change the effective angle of engagement and therefore cause a deviation from the supplied calibration Proper installation of the flowmeter minimizes the harmful effects of fluid swirl HP 208 Page 9 of 17 HP Insertion Meter Aligning the handle with the center line of the pipe will also align the turbine rotor to the proper position The turbine rotor is normally calibrated in one direction The handle is marked with the calibrated direction of flow A rotor may be calibrated in both directions where required In the later application the arrow indicates the flow direction for the forward calibration In order for the HP Series Flowmeter to properly measure fluid flow it is necessary to insert the well assembly at the mean velocity point At this depth the velocity and net area of the pipe section may be used to calculate the pulses per unit volume of the measuring section The mean velocity point is a weak function of flow rate as well as other factors which influence Reynolds number The mean velocity point may be determined using experimental methods to establish the flow profile and empirically determine the desired insertion depth See Table C Table C includes the approximate location of the mean velocity point in large diameter pipes For small diameter piping locate the rotor in the center of the pipe to eliminate sidewall effects near
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