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1 Products availableWe offer a complete product range of gauge hatch, Double Case Positive Displacement Meter, Flow Governors, Master PD Flow Meters and Gauge Hatches
Double Case Positive Displacement Meters have been specially designed to eliminate the effect of line pressure on the metering accuracy. Available in a wide range of flow capacities, the Double Case design ensures a high accuracy along with ease of servicing of in-situ.
The Double Case PD Flow Meter consists of an outer casing with measuring capsule fixed inside. The measuring capsule consists of a bulk meter body, rotor with vane blades and two internal covers. Outer end cover and manifold, bolted to the outer casing, form a closed chamber around the measuring capsule to keep it under equilibrium pressure all the time.
The product enters the Flow Meter measuring capsule through the manifold inlet and at the same time fills up the space between the outer casing and the measuring capsule. This effectively pressure balances the measuring capsule and prevents distortion due to line pressure fluctuations to ensure a high metering accuracy. The separate manifold design further enhances the performance and accuracy by preventing distortion due to pipe line stresses.
The liquid on entering the measuring chamber causes the rotor to revolve by exerting pressure on the vane blades. The proximity of the rotor to the body forms an efficient seal, while 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.
The rotor spindle transmits the drive through a pressure tight lip seal in the meter front cover to the pulse transmitter or the calibrating mechanism, which calibrates the meter output for a corrected counter readout. All mechanical Double Case PD Flow Meters are fitted with Veeder Root mechanical counters.
The Flow Governor is a protective device, installed downstream of the Flow Meter, to limit the flow rate through the Flow Meter, to the maximum Meter flow rate capacity. This becomes essential when the pump capacity is greater than the capacity of the Flow Meter or when a common pump is used for more than one Flow Meter
The Flow Governor consists of a body having an orifice, a spring balanced piston and a butterfly control valve. Variation in liquid flow across the orifice creates a differential pressure, which applies a downward or upward force on the piston. This in turn rotates the butterfly valve to restrict and maintain a constant rate of flow. The downward compression force on the piston is resisted by the spring tension, which is adjustable and enables accurate presetting of a constant flow rate.
Master Meters are 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
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 meters 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 zeroed 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 litres 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 Meters fractional reading is noted from the unit drum. After applying pre-established correction factors to the Master Flow Meters reading, the corrected reading is then compared with the test flow meters reading to calculate the inaccuracies of the test flow meter.
Gauge Hatches have been designed to provide secure, vapor-tight, non-sparking access ports for storage tank dipping and sampling functions.
LOCKABLE GAUGE HATCH SIZE 3 (75 mm)All brass construction with 3 API screwed connection. The thick elastomer ring dovetailed into the recess in the cover provides maximum vapor tightness and security against sparking.Brass body and cover. Screwed 3 API.
PRESSURE TYPE GAUGE HATCH SIZES 4 (100 mm), 6 (150 mm), 8 (200 mm)Cast iron cover incorporates a heavy synthetic rubber ring dovetailed into a recess, In 4 and 6 sizes a special moulded plastic seat inserted into the base ensures maximum vapor tightness and security against sparking. A drip ring drains condensate away from the joint face to minimize the effects of freezing.
Uniform tightness at all points between the cover and the base is provided by a spherical self draining connection between the lever and the cover. Should sticking occur due to infrequent opening the handle use to screw down the cover can be removed and used to loosen the cover by continuing to rotate anti-clockwise until the cover lifts.Steel body cast iron cover bronze lever. 150 lbs ASA flange.
SPARK-PROOF GAUGE HATCH SIZE 8 (200 mm)Cast steel base can be supplied undrilled for welding directly to tank roof plates, or drilled for fitting to tank roof nozzle.A brass insert ring in the base is machined to give radial contact with the conical seating of the brass cover thereby ensuring an effective long term seal. Base has gauging notch located just below the insert ring.Cast steel base brass cover bronze handle. Flange 150 lbs ASA flat face (FF).
GAUGE HATCH SIZES 4 (100 mm), 6 (150 mm), 8 (200 mm)The aluminium base, with gauging notch, incorporates a self draining seat and has 8 slotted holes to facilitate mounting on the range of tank roof flanges listed opposite.
The aluminium cover is secured to the base with a stainless steel hinge pin. A nitrile rubber O ring seal is fitted into the cover to provide tight closure and to cushion the effects of repeated operation.
The units can accommodate service temperatures of -300C to +900C.
SCREW DOWN GAUGE HATCH SIZES 4 (100 mm), 6 (150 mm), 8 (200mm)The aluminium base, with gauging notch, incorporates a self draining seat and has 8 slotted holes to facilitate mounting on the range of tank roof flanges listed opposite.
The aluminium cover is secured to the base with a stainless steel hinge pin. A nitrile rubber O ring seal is fitted into the cover to provide tight closure and to cushion the effects of repeated operation. The cover of the Fig. 5072 is slotted to accept the eye bolt and hand nut used for clamping the cover. The units can accommodate service temperatures of -300C to +900C.
The T-550 is an efficient and highly accurate Positive Displacement Flowmeter. Proven design of Tri-rotor ensures minimal wear and longer service life.
The T-550 flow meter has a simple and robust design. It consists of a housing and three rotors. The rotors are supported by bearings plates. The calibrator captures the rotor rotation in a calibrated manner and transmits to a counter.
Chakan, Pune, Maharashtra 