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Master Positive Displacement Flow Meters - Master PD Flowmeter

Master Positive Displacement Flow Meters
Master Positive Displacement Flow Metersare highly accurate Flow Meters used for checking the accuracy & calibration of Flow Meters in use in their normal operating position, without the need for a Proving Tank or the breaking down of pipe work.
Master PD Flow Meters are precision made, highly accurate liquid measuring Flow Meters, used for checking the accuracy and calibration of field flow meters. These are available in single, double and triple capsule models to suit applications covering a wide range of flow capacities. Master PD Flow Meters facilitate quick calibration of field flow meters in their normal operating position, without the need for a proving tank or the dismantling of meters from the pipe lines.
   
 
DESIGN FEATURES
• High accuracy and repeatability over a wide flow range
• Special Unit Drum attachment for higher resolution readout
• Stepless calibration adjustment
• Low pressure drop
• Available in fixed or mobile trolley-mounted version
 
PRINCIPLE OF OPERATION
 
A mechanical Master PD Flow Meter is fitted with a Rate of Flow Indicator, Unit Drum attachment and a Veeder Root Counter. The unit drum facilitates to read-off fractions of litre (or deca-litre) and the final reading can be accurately read to 0.05 litre (or 0.05 deca-litre). The unit drum, positioned below the counter, consists of a
graduated circular drum with vernier scale marking. The mobile unit consists of a mobile trolley on which the Master PD Flow Meter is mounted, alongwith inlet and outlet hose connections to connect the Master PD Flow Meter in series with the field flow meter.
The procedure for checking is simple. The Master Flow Meter is connected in series with the field flow meter, either by connecting it in the field flow meter's pipe line or with the help of rubber hoses. After priming the system, counters of the test flow meter and the Master Flow Meter are zeroised and the adjusting ring of the unit drum is turned so that the zero marking coincides with any graduation on the unit drum. A fixed quantity of liquid, say 1000 ltres is then passed at a constant flow rate and then respective readings on test flow meter and Master Flow Meter counters are noted down. Master Flow Meter's fractional reading is noted from the unit drum. After applying pre-established correction factors to the Master Flow Meter's reading, the corrected reading is then compared with the test flow meter's reading to calculate the inaccuracies of the test flow meter.
 
APPLICATIONS
• Calibration of field flow meters
• Tank calibration
• Test rigs
 
SPECIFICATIONS
 
Type
Positive displacement rotary vane
Sizes & Capsule
80 mm (3"), single capsule (Models TLM-03 & TLM-04)
80 mm (3"), double capsule (Models TLM-05 & TLM-06)
100 mm (4"), double capsule (Models TLM-07 & TLM-08)
100 mm (4"), triple capsule (Models TLM-09 & TLM-10)
150 mm (6"), triple capsule (Models TLM-11 & TLM-12)
Flow Range
136 - 1364 lpm (TLM-03, TLM-04)
205 - 2046 lpm (TLM-05, TLM-06)
227 - 2273 lpm (TLM-07, TLM-08)
295 - 2955 lpm (TLM-09, TLM-10)
295 - 2955 lpm (TLM-11, TLM-12)
(Maximum flow rates can be uprated by 30% for aircraft refuelling with ATF)
End Connections
150 Class, ANSI B 16.5, FF/RF
Meter Hand of
(when facing the counter)
Left hand entry, right hand discharge Discharge (for even meter model nos.)
Right hand entry, left hand discharge (for odd meter model nos.)
Drive :
Positive gear train
Counter :
Mechanical - 5 digit reset, 8 digit non-reset totaliser, weatherproof Veeder Root 7887
Unit of Registration
Litres (TLM-03/04)
Deca-litres (TLM-05 to TLM-12)
(Other units available on request)
Resolution
0.05 Litres (TLM-03/04)
0.05 Deca-litres (TLM-05 to TLM-12)
Accuracy
Better than ±0.10%
(In accordance with IS:2801)
Repeatability
Better than ±0.02%
Rangeability
100% to 10% of maximum flow rate
Max. Working Pressure
10.54 kg/cm2
Temperature
Upto 700C (Standard)
Upto 2000C (Special)
Viscosity
0.5 cst to 200 cst
(Consult factory for liquid viscosity above 200 cst)