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Neptune TRU/FLO, Installation And Maintenance Manual

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12

TRU/FLO Compound Meter Installation and Maintenance Guide

5  Maintaining the TRU/FLO Compound Meter

This chapter provides instructions for maintaining the TRU/FLO meter. The 3-inch, 4-
inch, and 6-inch meters in the TRU/FLO product line share similar features and functions. 
TRU/FLO meters are composed of four major components: 

•     T-10 chamber.

•     Turbine measuring assembly.

•     Main valve assembly. 

•     Throttle valve assembly. 

Figure 6  Reusable Parts

 

Maincase

Cover assembly

Plate

Throttle valve assembly

Main valve snap ring

Snap ring

Drive assembly

T-10 strainer

Calibration vane

Main valve 
assembly

Summary of Contents for TRU/FLO

Page 1: ...E C o d E C o d TRU FLO COMPOUND METER INSTALLATION AND MAINTENANCE GUIDE TRU FLO Compound Meter Installation and Maintenance Guide...

Page 2: ......

Page 3: ...TRU FLO Compound Meter Installation and Maintenance Guide...

Page 4: ...ered trademark of Neptune Technology Group Inc E Coder is a registered trademark of Neptune Technology Group Inc R900 is a registered trademark of Neptune Technology Group Inc E Coder R900i is a trade...

Page 5: ...pecifications Environmental Specifications 4 TRU FLO Operating Characteristics 4 TRU FLO Dimensions 5 3 General Installation Guidelines Tools and Materials 7 Safety and Preliminary Checks 7 4 Installi...

Page 6: ...mbly 20 Removing the Turbine Measuring Assembly 20 Replacing the Turbine Measuring Assembly 22 Setting the Calibration Vane Assembly 23 Performing Maintenance on the Throttle Valve Assembly 24 Removin...

Page 7: ...on and Maintenance Guide v C 2 inch TRU FLO Maintenance Removing the UME 39 Performing Maintenance on the Internal Strainer 40 Performing Maintenance on the Main Valve Assembly 40 Performing Maintenan...

Page 8: ...Notes Contents vi TRU FLO Compound Meter Installation and Maintenance Guide...

Page 9: ...e 16 17 T 10 Plate Gasket 17 18 Removing the T 10 Strainer 17 19 Removing the T 10 Chamber 17 20 Square O ring 18 21 Cleaning Around the Chamber 18 22 Cleaning Under the Registers 18 23 Adding the T 1...

Page 10: ...the Main Valve Assembly 27 49 Attaching the Main Valve Snap Ring 27 50 External Strainer 31 51 Representative Breakdown of the 2 inch TRU FLO Meter Components 33 52 Representative Breakdown of the 3 i...

Page 11: ...nty Chart 3 2 Environmental Specifications 4 3 Operating Characteristics 4 4 Dimensions 5 5 Meter Registration Per One Revolution of the Sweep Hand 6 6 Maximum Dial Face Capacity 6 Wheel Odometer 6 7...

Page 12: ...x TRU FLO Compound Meter Installation and Maintenance Guide Notes Tables...

Page 13: ...escription The TRU FLO meter is designed to register wide flow ranges where varying flow rates are typical It combines the low flow sensitivity of a disc type meter with the high flow capacity of a tu...

Page 14: ...handle A calibration vane allows field calibration of the meter to lengthen service life and to ensure accurate registration The two magnetic driven roll sealed registers simplify the meter s design a...

Page 15: ...enance is easily accomplished by in line replacement of major components or a factory calibrated UME Table 1 TRU FLO Warranty Chart Size Extended Low Flow Accuracy New Meter Accuracy Repaired Meter Ac...

Page 16: ...on Maximum Operating Pressure 150 PSI 1034 KPA Maximum Operating Temperature of Water 80 F Table 3 Operating Characteristics TRU FLO Meter Size Normal Operating Range 100 Accuracy 1 5 AWWA Standard Lo...

Page 17: ...n mm Std in mm PRO in mm E Coder R900i in mm in mm in mm in mm in mm in mm 2 inch HP 15 387 8 219 9 229 12 308 2 64 13 16 21 5 149 6 152 1 NPT 38 2 inch Oval 150 lb 32 14 5 3 inch 17 432 10 267 11 279...

Page 18: ...6 Maximum Dial Face Capacity 6 Wheel Odometer US Gallon Imperial Gallon Cubic Feet Cubic Meters Turbine Side 2 100 000 000 100 000 000 10 000 000 1 000 000 3 100 000 000 100 000 000 10 000 000 1 000 0...

Page 19: ...ng each installation Verify that you are at the location specified on the Site Work Order Verify that the site is safe for you and your equipment Table 7 is not a complete list of tools Table 7 Recomm...

Page 20: ...packing After unpacking the TRU FLO meter inspect it for damage If the meter appears to be damaged notify your Neptune Territory Manager or Distributor If one or more items requires reshipment use the...

Page 21: ...n pipe is required downstream of the meter and strainer assembly This can include components that are fully open in their normal operating position If a Neptune meter is installed without a strainer a...

Page 22: ...downstream piping must always provide sufficient back pressure to maintain a full line at the meter When installing a TRU FLO meter always follow normal good piping practices In particular all gasket...

Page 23: ...ns See Figure 5 3 With the outlet side gate valve closed slowly open the inlet side valve to pressurize the meter 4 Turn the air bleed screw located next to the turbine register with a flat screwdrive...

Page 24: ...6 inch meters in the TRU FLO product line share similar features and functions TRU FLO meters are composed of four major components T 10 chamber Turbine measuring assembly Main valve assembly Throttl...

Page 25: ...s the register bronze cover and the turbine measuring assembly Figure 7 Unitized Measuring Element UME When a new UME is ordered from Neptune The UME comes with two new registers attached The UME has...

Page 26: ...re 9 Removing the Registers 4 Remove the cover bolts attaching the cover assembly to the maincase 5 The 4 inch and 6 inch TRU FLOs have two 3 8 16 inch threaded holes that can be used to help remove t...

Page 27: ...he Gasket Reinstalling the Cover Assembly Complete the following steps to re install the cover assembly 1 Place the maincase gasket on the maincase See Figure 12 Figure 12 Placing the Maincase Gasket...

Page 28: ...location marked TURBINE on top of the cover assembly Place the T 10 register in the location marked T 10 DISC on top of the cover assembly See Figure 15 Then secure them with the seal pin Figure 15 T...

Page 29: ...strainer See Figure 18 Figure 18 Removing the T 10 Strainer 5 Insert the flathead screwdriver under the T 10 chamber after the strainer is removed then lift to remove the chamber See Figure 19 6 Inspe...

Page 30: ...e the T 10 chamber was seated in the cover assembly See Figure 21 Lightly rub to remove any collected debris or sediment on the machined surfaces Figure 21 Cleaning Around the Chamber Turn the cover a...

Page 31: ...the T 10 chamber See Figure 23 Make sure the screen is flush with the T 10 chamber Figure 23 Adding the T 10 Strainer 3 Place the T 10 chamber with the T 10 strainer in the cover assembly with the mag...

Page 32: ...hree primary assemblies on the turbine measuring assembly Rotor Assembly Calibration Vane Assembly Magnet Drive Assembly Figure 28 Turbine Measuring Assembly Removing the Turbine Measuring Assembly To...

Page 33: ...the Seal Ring 5 Use the 7 16 inch wrench to remove the four lock nuts and bolts underneath the turbine measuring assembly See Figure 31 Figure 31 Removing the Lock Nuts 6 Remove the turbine measuring...

Page 34: ...replace the turbine measuring assembly complete the following steps 1 Before proceeding inspect the magnet drive assembly If it has been cracked or damaged replace the magnet drive assembly See Figure...

Page 35: ...rbine measuring assembly with a wrench from 50 inch lbs to 55 inch lbs to secure it See Figure 37 Figure 37 Tighten Locking Nuts 7 Add the seal ring to the turbine measuring assembly See Figure 38 Fig...

Page 36: ...e Calibration Vane Assembly 4 To increase the registration turn the calibration vane assembly toward the plus sign 5 To decrease the registration turn the calibration vane assembly toward the minus si...

Page 37: ...To replace the throttle valve assembly complete the following steps 1 Place the throttle valve assembly in the maincase with the flap toward the main valve assembly See Figure 43 The main valve assem...

Page 38: ...Maintenance on the Throttle Valve Assembly on page 24 1 Place a flathead screwdriver underneath the notch in the snap ring See Figure 44 Figure 44 Notch in the Snap Ring 2 Turn the screwdriver 1 4 tu...

Page 39: ...bly complete the following steps 1 Place the main valve assembly back in the maincase then push it toward the inlet side of the meter See Figure 48 Figure 48 Returning the Main Valve Assembly 2 Attach...

Page 40: ...nce is required more frequently Similarly if a meter has a high amount of usage then routine maintenance can be performed more frequently for two reasons The meter is moving more water which means it...

Page 41: ...the magnet drive for damage b Examine the calibration vane assembly for damage c Examine the rotor assembly for damage d Clean the bronze strainer The register on the meter can be the wrong size The...

Page 42: ...Why Maintenance is Important 30 TRU FLO Compound Meter Installation and Maintenance Guide Notes...

Page 43: ...ntain the TRU FLO strainer Cleaning the Strainer To clean the strainer complete the following steps 1 First remove the cover 2 Pull the metal strainer out of the body and clean off any build up of deb...

Page 44: ...Appendix A 32 TRU FLO Compound Meter Installation and Maintenance Guide Notes...

Page 45: ...t This appendix describes the individual parts that makeup the TRU FLO meter 2 inch Meter The following diagram is a representative breakdown of the 2 inch meter Table 8 on page 34 describes each part...

Page 46: ...TRU FLO Parts List Item Description Item Description 1 Maincase 7 Lockring 2 Main Valve Assembly 8 Gasket Maincase 3 O ring 9 Bolt 3 8 16 UNC 2A x 1 inch LG SS 316 4 Retainer Ring 10 Cover Assembly 5...

Page 47: ...5 3 inch 4 inch and 6 inch Meters The following diagram is a representative breakdown of the 3 inch 4 inch and 6 inch meters Table 9 on page 36 describes each part of the diagram Figure 52 Representat...

Page 48: ...2 Maincase Gasket 11 Vent Screw 20 Screw 3 Maincase Gasket Kit 12 Seal Wire with Lead Seal 21 Bolt 4 Snap Ring 13 Seal Cap 22 Washer Lock 5 Throttle Valve Assembly 14 Calibration Nut 23 Drive Assembl...

Page 49: ...TRU FLO Maintenance This appendix provides information on maintenance for the 2 inch meter Removing the UME Complete the following steps 1 Remove the bolts around the perimeter of the cover 2 Separat...

Page 50: ...e 54 Internal Strainer Performing Maintenance on the Main Valve Assembly Complete the following steps 1 Remove the four screws that secure the retainer ring to inlet of the main valve assembly See Fig...

Page 51: ...e 57 4 Replace the o ring if needed Figure 57 O ring 5 After checking the retainer ring the o ring and the integrity of the main valve the parts can be reinstalled See Figure 58 Figure 58 Reinstalling...

Page 52: ...replaced by removing the two flathead screws on the side of the valve 3 It is possible that the entire throttle valve needs to be replaced In that case the throttle valve door fits into the throttle...

Page 53: ...nating complicated combined drive mechanisms main valve assembly Spring loaded assembly used to divert low flow rates through the T 10 measuring chamber Primarily composed of a stainless steel spring...

Page 54: ...O s overall flow rate increases As the flow increases through the TRU FLO the main valve assembly seals off the throttle valve This helps regulate the amount of flow moving through the T 10 measuring...

Page 55: ...asuring assemblies 1 nutating disc meters 43 F flow conditions 9 G gasket 10 chamber 19 kit 7 gate valve 11 guide pins 15 H high flow 1 29 HP Protectus III 13 hydraulic valve 2 I inspect 8 installatio...

Page 56: ...trainer installing 9 plate 9 T 10 17 19 T T 10 chamber 2 12 13 16 19 29 removing 16 replacing 19 T 10 plate 16 T 10 plate gasket 17 T 10 strainer 17 19 29 throttle valve assembly 12 24 removing 24 rep...

Page 57: ......

Page 58: ...ghway 229 Tallassee AL 36078 USA Tel 800 633 8754 Fax 334 283 7293 Neptune Technology Group Canada Ltd 7275 West Credit Avenue Mississauga Ontario L5N 5M9 Canada Tel 905 858 4211 Fax 905 858 0428 Nept...

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