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Page 2

Milltronics Millflo – INSTRUCTION MANUAL

7ML19985CS01

Specifications

Nominal Sizes

• 100 mm (4"), 150 mm (6"), 200 mm (8"), 250 mm (10"), 300 mm (12")

Flow Rate

• 1 t/h to 230 t/h (1 STPH to 250 STPH) dependent upon range (see page 3) and product

bulk density

Product

• fine powder to 13 mm (1/2 inch) (see page 3)

Operating Temperature

• -40 to 65 °C (-40 to 150 °F)

Repeatability

•

"

0.2%

Accuracy

•

"

1% of full scale

Construction

• assembly:

• all welded housing and flowguide

• material:

• mild steel, painted
• optional: 304 (1.4301) or 316 (1.4404) stainless steel

• gasketing:
• silicone rubber

• sensing plate:

• 304 (1.4301) stainless steel
• optional:

• 316 (1.4404) stainless steel
• wear resistant coatings
• low friction coating

Load Cell

• stainless steel parallelogram
• temperature:

• -40 to 85 °C (-40 to 185 °F) maximum range
• 0 to 65 °C (32 to 150 °F) internally compensated

• output:

• 2 mV / V excitation at rated load cell capacity

Approvals

• CE

Weight

• see page 3

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Содержание Milltronics MILLFLO

Страница 1: ...MILLFLO milltronics Instruction Manual September 2003 ...

Страница 2: ...n electronic version We encourage users to purchase authorized bound manuals or to view electronic versions as designed and authored by Siemens Milltronics Process Instruments Inc Siemens Milltronics Process Instruments Inc will not be responsible for the contents of partial or whole reproductions of either bound or electronic versions While we have verified the contents of this manual for agreeme...

Страница 3: ... 4 Negative Displacement 5 Installation 6 Preparation 6 Welding 6 Load Cell Handling 6 Disassembly 7 Installation of Shipping Stop 7 Installation 8 Millflo Outline and Dimensions 9 Millflo Wiring 10 Calibration 11 Applications 13 Material Feed 13 Flowmeter In Feed Chutes 15 Maintenance 18 Periodic Recalibration 18 Checks 18 Spare Parts 18 ...

Страница 4: ...ii ...

Страница 5: ...weight The process is immune to the effect of product buildup as only horizontal force is measured The Millflo features easy installation into standard pipe sizes simple operation and fast and accurate flow response The Millflo is an accurate and repeatable force sensor and its performance depends on the consistency of the material flow into the flowmeter and the quality of the installation The Ma...

Страница 6: ...atability 0 2 Accuracy 1 of full scale Construction assembly all welded housing and flowguide material mild steel painted optional 304 1 4301 or 316 1 4404 stainless steel gasketing silicone rubber sensing plate 304 1 4301 stainless steel optional 316 1 4404 stainless steel wear resistant coatings low friction coating Load Cell stainless steel parallelogram temperature 40 to 85 C 40 to 185 F maxim...

Страница 7: ... Min Flow Max Flow Particle Size Load Cell Size Weight 4 0 1 STPH 0 1 t h 0 15 STPH 0 14 t h 6 mm 1 4 2 or 5 lb 20 kg 45 lb 6 0 4 4 STPH 0 4t h 0 38 STPH 0 35t h 10 mm 3 8 5 or 10 lb 32 kg 70 lb 8 0 20 STPH 0 18 t h 0 88 STPH 0 80 t h 10 mm 3 8 10 or 20 lb 90 kg 200 lb 10 0 50 STPH 0 45 t h 0 14 STPH 0 13 t h 13 mm 1 2 20 or 50 lb 113 kg 250 lb 12 0 100 STPH 0 90 t h 0 250 STPH 0 230 t h 13 mm 1 2...

Страница 8: ...and discharging through the outlet The force exerted on the sensing plate has both a vertical and horizontal component The design of the load cell is such that it reacts to the horizontal component only the vertical component is ignored The sensing plate is displaced proportionally to the material flow and is not susceptible to material build up so long as it does not bridge across to the housing ...

Страница 9: ...ative stop is factory set so that the output signal is limited to 20 mV when the load cell is forced to travel in the negative direction negative displacement Under no flow conditions the load cell sensing plate assembly is at rest at static zero Under this condition the negative stop should not contact the load cell and the output signal from the load cell will be approximately 5 to 0 mV DC norma...

Страница 10: ...y inspected for shipping damage If damage is suspected contact your Siemens Milltronics representative and the shipping carrier When handling the Millflo ensure the shipping stop is in place to secure the sensing plate Never subject the Millflo to shock by hitting it when trying to position it Welding Remove the sensing plate and load cell before welding Load Cell Handling The load cell tolerates ...

Страница 11: ... vertical 6 Set the assemblies aside in a safe place top cover screws 4 places top cover junction box assembly top cover flange calibration weight cable load cell sensing plate assembly access cover shipping stop threaded rod loosen 2nd to remove shipping stop loosen first to free sensing plate gasket load cell cable load cell mounting screws 2places IMPORTANT While transporting support the load c...

Страница 12: ...pping stop If the load cell sensing plate assembly was removed reverse the disassembly procedure to reassemble the load cell sensing assembly into the housing and to replace the cover junction box assembly on to the top access flange Do not reinstall the shipping stop Exercise caution while handling the load cell sensing plate assembly Refer to the diagrams in the Load Cell Handling section on pag...

Страница 13: ... 229 mm 9 108 mm 4 26 191 mm 7 5 22 5 8 22 mm 0 875 279 mm 11 162 mm 136 241 mm 9 5 22 5 413 mm 16 25 150 mm 6 838 mm 33 254 mm 10 838 mm 33 435 mm 17 1 1 8 22 mm 0 875 279 mm 11 162 mm 6 36 241 mm 9 5 22 5 8 22 mm 0 875 343 mm 13 5 212 mm 8 33 298 mm 11 75 22 5 660 mm 26 200 mm 8 1168 mm 46 356 mm 14 1168 mm 46 577 mm 22 72 8 22 mm 0 875 343 mm 13 5 212 mm 8 33 298 mm 11 75 22 5 6 25 mm 1 483 mm ...

Страница 14: ...Millflo Wiring Millflo junction box wire by colour refer to integrator manual to Millflo loadcell red EX black EX white SIG green Sig shield customer cable to integrator single load cell sensing or non sensing configuration Refer to integrator instruction manual ...

Страница 15: ... flowrate based on the Millflo Calibration Constant of 45 g T H tons per hour 1 Test Weight Design Flowrate x Calibration Point x Calibration Constant Test Rate Test Weight Calibration Constant For Example If the Design Flowrate is 6 T H then Test Weight 60 6 T H x 60 x 45 g T H 162 g Test Weight 80 6 T H x 80 x 45 g T H 216 g Therefore the test weight should be between 162 g and 216 g If an avail...

Страница 16: ...ffective material flow friction and velocity can only be reproduced by running actual material tests At least two 5 minute samples should be taken to ensure repeatability Refer to Material Test and subsequent Factoring of the flowmeter sections of the integrator manual Re Rating After material tests have been done and a decision is made to re rate the Millflo at a higher or lower capacity with 20 ...

Страница 17: ...best monitored at low velocity Material Feed Ideal material in feed characteristics constant and relatively low material velocity uniform material flowrate not pulsing negligible air flow through the flowmeter flowguide 17 to 50 full during operation Feed Conditions A gravity fed flowmeter generally provides accurate readings A mechanically fed flowmeter may not provide a consistent feed affecting...

Страница 18: ...Required when the material is pneumatically conveyed or flowmeter process isolation is required Use a reverse flowguide transition for variable operating speeds or constant speeds above 10 rpm Common to grain applications Slow elevators typically chain drive often produce heavily pulsing material discharge requiring feeder discharge damping Generally not suitable for the Millflo Fast elevators typ...

Страница 19: ...speed varieties motor vibrating pan A reverse flowguide transition reverses the direction of the bin or feeder material discharge before the material enters the flowmeter flowguide Reversing direction forces the material into a desirable flow pattern as opposed to permitting material to be flung from the feeder directly into the flowguide This transition is especially important for high or variabl...

Страница 20: ... fall is more than 0 6 m 2 ft from the material infeed The long fall chute presents problematic conditions because material velocity is increased increasing flowmeter component abrasion Increased distances after chute angle changes to settle material into desirable flow patterns are also required 0 6m 2ft Use a dogleg to reduce the detrimental effect of high or variable material velocity and when ...

Страница 21: ...feed diameter upper limit choose the next largest diameter Vent the in feed and discharge chutes to a common dust collector if a material in feed discharge differential air pressure is anticipated and rotary airlock feeders are not used A tuning gate can be installed in each vent to balance the air pressure If a dust collector is not used an air bypass chute can be installed between the flowmeter ...

Страница 22: ...nics representative Check for material bridging across the load cell or sensing plate to the housing which can restrict the free movement of either component Do not strike the flowmeter its components or adjacent piping to dislodge material Check for wearing of the sensing plate If wear is excessive contact your Siemens Milltronics representative Spare Parts The following are the recommended spare...

Страница 23: ......

Страница 24: ...s Process Instruments Inc 1954Technology Drive P O Box 4225 Peterborough ON Canada K9J 7B1 Tel 705 745 2431 Fax 705 741 0466 Email techpubs siemens milltronics com Siemens Milltronics Process Instruments Inc 2003 Subject to change without prior notice Printed in Canada ...

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