Romet RM Series Rotary Meter Installation Manual
Contents
1. ROMME Limited NSTALLATIONS amp MIUNTENANC BULLETIN RM IMPERIAL amp METRIC INTRODUCTION The Romet rotary meter is suitable for the measurement of most clean dry gases The installation of an upstream filter or at the very least a 200 mesh strai ner e g Romet Tee Screen will protect the meter from contaminants in the gas stream and permit accurate measurement The meter is not suitable for the measurement of liquids Consult the factory if any co rrosive gases i e sour or sewer gases are present since these gases may have adverse effects on the mete r Meters specifically constructed for these applications are available The maximum allowable operating pressure MAOP of 175 psig or 12 bar and flow rating Qmax for each meter is indicated on the serial plate and should not be exceeded Although ruggedly constructed the Romet meter is a precision measuring instrument 1 0 Pre installation 1 1 Inspect the meter for any damage which may have occurred during transportation and handling Consult the factory if the meter has been damaged 1 2 Remove the sealing plugs or caps from the inlet and outlet port of the meter 1 3 Ensure that all foreign material and scale hav e been removed from the meter station piping and that the mounting flanges are the correct distance F apart aligned with each other and level maximum of 1 16 per foot or 5mm per meter in all directions INLET Meter Model F RM1000 RM5000 6 15 162. RM7000 RM23000 9 11 16 RM30 RM140 176 mm 7 SEZ RM200 RM650 246 mm ee VERTICAL HORIZONTAL 1 4 The meter can be installed in either the horizontal or vertical position The vertical position is the recommended installation since contaminants are more easily expelled from the meter reducing the potential for internal wear or damage to the meter 1 5 Check that the correct hardware is available as per Table 1 0 TABLE 1 0 HARDWARE SPECIFICATION TABLE METER MODEL FLANGE BOLTS WASHERS GASKETS 5 8 11 x 1 5 long ANSI 150 2 RM1000 RM1500 ANSI 150 Hex Head SAE Grade 5 Flat Steel Zinc Plated Full Face x 1 16 thick RM30 RM40 2 Flat Face Steel Zinc Plated 8 Required Compressed Fiber 8 Required 2 Required 5 8 11 x 1 75 long ANSI 150 2 RM2000 RM3000 ANSI 150 Hex Head SAE Grade 5 Flat Steel Zinc Plated Full Face x 1 16 thick RM55 RM85 2 Flat Face Steel Zinc Plated 8 Required Compressed Fiber 8 Required 2 Required 5 8 11 x 2 long ANSI 150 3 RM5000 RM7000 ANSI 150 Hex Head SAE Grade 5 Flat Steel Zinc Plated Full Face x 1 16 thick RM140 RM200 3 Flat Face Steel Zinc Plated 8 Required Compressed Fiber 8 Required 2 Required 5 8 11 x 2 5 long ANSI 150 4 RM11000 RM23000 ANSI 150 Hex Head SAE Grade 5 Flat Steel Zinc Plated Full Face x 1 16 thick RM300 RM650 4 Flat Face Steel Zinc Plated 16 Required Compressed Fiber 16 Required 2 Required 2 0 Inst
3. allation 2 1 Install the meter using the hardware as specified in Table 1 0 2 2 Tighten the flange bolts to a torque of 20 ft lbs 27 Nm 2 3 Fill the thrust cover magnetic housing RM2000 RM23000 RM55RM650 and module with approved meter oil see section 2 5 to midway within the sight glass In the case of a module with a counter STD CTR DCID TC 2 4 2 5 3 0 3 1 3 2 TCID fill to the line on the counter dial plate Depending on the meter model and mounting position hor izontal or vertical the required volume of oil will be different Refer to table 2 0 to obtain the appropriate oil volumes Note Side reading STD CTR meters require an oil volu me for the module of 4 2 0z 120ml In the case of ECM2 use the oil volumes for the magnetic housing and thrust cover for the applicable size TC meter The ECM2 module being electronic does not require oil TABLE 2 0 OIL VOLUME REQUIREMENTS METER MODEL RM1000 RM1500 RM30 RM40 Imp oz ml STD CTR STD ID amp DCID TC amp TCID HORIZONTAL Module 2 50z 70ml Magnetic Housing N A Thrust Cover 0 90z 25ml VERTICAL Module 6 30z 180ml Magnetic Housing N A Thrust Cover 2 10z 60ml HORIZONTAL VERTICAL RM2000 RM5000 RM55 RM140 Module 6 30z 180ml Magnetic Housing 2 30z 65ml Thrust Cover 0 90z 25ml Module 6 30z 180ml Magnetic Housing 3 50z 100ml Thrust Cover 2 50z 70ml Module 5 60z 160ml Magnetic Housing 2 30z 65ml Thrust Cov
4. er 0 90z 25ml Module 8 80z 250ml Magnetic Housing 3 50z 100ml Thrust Cover 2 50z 70ml RM7000 RM23000 RM200 RM650 Module 4 202z 120ml Magnetic Housing 3 50z 100ml Thrust Module 4 20z 120ml Magnetic Housing11 60z 330ml Thrust Module 8 10z 240ml Magnetic Housing3 40z 100ml Thrust 1 40z 40ml Module 20 60z 570ml Magnetic Housing11 60z 330ml Thrust Cover 8 80z 250ml Cover 1 40z 40ml Cover _8 80z 250ml Cover An approved meter oil is available from Romet in one litre plastic bottle Substitute oils should have a 60 65 SSU or ISO 10 15 at 100 F or 38 C and a pour point of 40 F C The use of non approved oil without Romet s prior consent may void the warranty The approved oil for use with Romet meters is Shell Tellus R 10 Post installation Turn the gas supply on slowly two seconds per 15 psig or 100 kPa maximum checking constantly for leaks Turning the gas supply on too quickly can overspeed and possibly damage the meter The flow rate of the meter should be checked to insure that the meter is correctly sized for the application and that the rated capacity Qmax is not being exceeded The rated capacity Qmax is indicated on the serial plate that is located on the thrust cover After installing the meter the customer s total gas load should be turned on to ens ure that the meter is sized correctly for the maximum flow rate By measuring the number of seconds that the instru ment drive or righ
5. er body and causing the impellers to rub against the cylinder wall Impellers rubbing meter noisy 5 Damaged impellers or timing gears Correctly align the mounting flanges following the specifications in section 1 3 of this bulletin Refer to the Romet Shop Manual for the proper procedure for inspecting the meter pressure and addressing any possible damage Meter accuracy low and 6 Impellers and or bearings 6 Shut off the gas supply to the meter and differential pressure high in contaminated dirt pipe purge the gas from the line Drain the oil comparison to the factory results scale pipe dope moisture from the meter and remove the meter distillate etc from service Flush and service the meter per the Romet Shop Manual Reinstall the meter and refill the oil per the procedures in section 2 of this bulletin 7 Mechanical instrument on 7 Repair or replace the instrument The an instrument drive meter is recommended maximum torque that an producing excessive drag instrument should transmit to the drive of the meter is 4 in oz or 0 004 Nm 8 Meter has been overfilled 8 Shut off the gas supply to the meter and with oil and the oil has purge the gas from the line Drain the oil passed through the impeller from the meter and remove the meter bearings contaminating the from service Flush and service the meter measurement chamber per the Romet Shop Manual Reinstall the meter and refill the oil as per the procedu
6. he meter and meter is running impellers purge the gas from the line Drain the oil from the meter and remove the meter from service Flush and service the meter per the Romet Shop Manual Reinstall the meter and refill the oil per the procedures in section 2 of this bulletin Any upstream filters or strainers should be inspected for possible damage 16 Worn or corroded impeller 16 Install new bearings Refer to the Romet bearings Shop Manual for the proper procedure Check the mounting flange alignment to ensure that the wear on the bearings is not attributable to misalignment Refer to section 1 3 of this bulletin Istec Corporation www istec corp com sales istec corp com
7. hould be performed to ensure that the meter is clean and in good operating condition 5 0 Troubleshooting TROUBLE POSSIBLE CAUSE Meter stopped 1 Obstruction jamming the impellers i e weld bead stone tap shaving 2 Mounting flanges have not been properly aligned or are not at the correct FL dimension deforming the meter body and causing the impellers to jam against the cylinder wall 3 Mechanical instrument has seized on an instrument drive meter REMEDY Shut off the gas supply to the meter and purge the line of any gas Remove the access plug from the thrust cover of the meter and insert a clean screwdriver until it engages the slotted crank cap on the end of the impeller shaft Rotate the impellers back and forth to expel the obstruction If the obstruction cannot be expelled remove the meter from service and disassemble the meter per the procedure in the Romet Service Manual Reinstall the meter per section2 of this bulletin Correctly align the mounting flanges following the specifications in section 1 3 of this bulletin Repair or replace the instrument The recommended maximum torque that an instrument should transmit to the drive of the meter is 4 in oz or 0 004 Nm The instrument drive module should be inspected for any damage per the Romet Shop Manual Impellers rubbing meter noisy 4 Mounting flanges have not been properly aligned or are not at the correct FL dimension deforming the met
8. res in section 2 of this bulletin 9 Meter was filled with oil 9 See remedy no 6 prior to installation Oil may have passed through the impeller bearings during handling and contaminated the measurement chamber Meter accuracy low and or 10 Mounting flanges are not 10 Correctly align the mounting flanges differential pressure high in properly aligned or at the following the specifications in section 1 3 comparison to the factory results correct F dimension of this bulletin deforming the cylinder body of the meter and causing the impellers to rub on the cylinder and or the impeller bearings to bind 11 Worn or corroded impeller 11 Install new bearings Refer to the Romet bearings Shop Manual for the proper procedure 12 Hoses and or connections 12 Runa leak test on the prover system and between the prover and the fix any leaks test meter are leaking Meter accuracy substantially 13 The master meter of the 13 Check the master meter accuracy with a higher than the factory test transfer prover may have reference meter results been contaminated during previous tests and running slow 14 Incorrect module is mated 14 Remove the module from the meter body to the pressure body i e and verify that the number stamped on RM5000 body with an the module face plate matches the meter RM7000 module body e g 5 matches with an RM5000 body Excessive vibration when the 15 Contaminates on the 15 Shut off the gas supply to t
9. t hand uncorrected counter wheel takes to complete one rota tion the meter can be clocked to calculate the actual flow rate using the formula below ACTUAL VOLUME PER HOUR TEST VOLUME x 3600 ROTATION TIME Test volume Volume of gas CF or m 3 for one complete revolution of the instrument drive or right hand wheel of the uncorrected counter METER VOLUME REVOLUTION RM1000 RM1500 10 CF RM2000 RM11000 10 CF 100 CF RM16000 RM23000 100 CF RM30 RM85 0 1 m RM140 RM650 1 0 m 4 0 Rotation time The time in seconds for one complete revolution of the instrument drive or right hand wheel of the uncorrected counter Maintenance The meter oil should be clear and at the correct f ill levels refer to section 2 4 Under normal operating conditions the oil should be inspect ed every 5 10 years and changed or topped up as required The change period will vary with the cleanliness of the gas being measured Pressure access plugs are offered as an option to permit o il filling and draining while the meter is pressurised and operating If the meter is running abnormally slow or has stopped due to contamination from the gas stream flush and or service the meter per the Romet Shop Manual Always drain all of the oil from the before removing the meter from the installation to prevent the oil from entering the measurement chamber during handling After completing the servicing oft he meter a differential pressure or proof test s
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