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Positive Displacement Flow Meters - TL Series PD Flow Meters (3" to 8")

Positive Displacement Flow Meters - Master PD Flowmeter
Positive Displacement Flow Meters are precision made liquid measuring Flow Meters. These are available in single, double and triple capsule models to suit applications covering a wide range of flow capacities. Simplicity of design and construction ensures unmatched accuracy and trouble-free operation over long periods of use.
   
 
DESIGN FEATURES
 
• Unique wear compensating vane design for sustained accuracy over a wide flow range
• Separate meter manifold prevents pipeline stresses from being transmitted to the measuring chamber
• Pressure balanced end covers protect distortion of measuring chamber due to line pressure
• Modular construction ensures interchangeable parts, lower inventory of spares and ease of service
• Stepless calibration adjustment
• Low pressure drop
• Mechanical or electronic readout
 
PRINCIPLE OF OPERATION
 
The product enters the Flow Meter through the manifold inlet and causes the rotor to revolve by pressure on the vane blades (see figure overleaf). The proximity of the rotor to the body forms an efficient seal, whilst the profile of the body ensures that the vane blades are guided through the measuring crescent. The vane blades divide the liquid into segments and each revolution of the rotor displaces four such segments. Pressurised product also fills spaces between the inner and outer end covers, so that the inner end covers, which form the measuring chamber, are pressure balanced and are prevented from distortion due to line pressure. The rotor spindle transmits the drive through a pressure tight lip seal in the meter's front cover to the pulse transmitter or the calibrating mechanism to calibrate the meter output for a corrected counter readout. All mechanical PD Flow Meters are fitted with Veeder Root counter.
 
APPLICATIONS
 
• Aviation refuelling
• Tank truck and rail wagon gantry filling
• Ship bunkering and barge loading
• Refineries
• Tank calibration
• Test Rigs
• Blending and batching in lube plants, process control and chemical industries
• Microprocessor based automation, remote control and data acquisition systems
 
SPECIFICATIONS
 
Type
Positive displacement rotary vane
Sizes & Capsule
80 mm (3"), single capsule (Models TL-03 and TL-04)
80 mm (3"), double capsule (Models TL-05 and TL-06)
100 mm (4"), double capsule (Models TL-07 and TL-08)
100 mm (4"), triple capsule (Models TL-09 and TL-10)
150 mm (6"), triple capsule (Models TL-11 and TL-12)
Flow Range
136 - 1364 lpm (TL-03, TL-04)
: 205 - 2046 lpm (TL-05, TL-06)
: 227 - 2273 lpm (TL-07, TL-08)
: 295 - 2955 lpm (TL-09, TL-10)
: 295 - 2955 lpm (TL-11, TL-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 Discharge
(when facing the counter )
Left hand entry, right hand 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
: Electronic - 5 digit reset, 8 digit non-reset totaliser, flameproof
Unit of Registration
Litres (TL-03/04) Deca-litres (TL-05 to TL-12) (Other units available on request)
Accuracy
Better than ±0.10% (In accordance with IS:2801)
Repeatability :
Better than ±0.02%
Rangeability :
100% to 10% of maximum flow rate