Titan Enterprises has published a new technical article that discusses how variation in flow velocity can impact flow measurement accuracy and how to mitigate any undesirable effects.
It is well known that flowmeters are sensitive to effects such as pulsating flow which can generate errors in flow measurement. Pulsating flows are common in systems using diaphragm, peristaltic or piston pumps for example. In a pulsating flow system, the velocity profile of the flow undergoes a dramatic change during each cycle of pulsation compared to even flow conditions.
According to theory, to accurately measure flow in a pulsating flow scenario the sampling rate of an electronic flow meter needs to be at least double the frequency rate of the pulsations themselves. If the pulsation rate is not taken into account, aliasing of the flow signal will be seen, resulting in erroneous measurement from the flowmeter.
Using advanced electronics, Titan’s Atrato® and Metraflow® ranges of ultrasonic flowmeters are able to resolve the ultrasonic signals to about 50 picoseconds. With downstream signal processing, Titan’s ultrasonic flowmeters are able to accurately measure pulsating fluid flow that is less than 10Hz. To accurately measure pulsating flows above this frequency requires inline pulse dampening.
To read the technical article in full, please visit: www.flowmeters.co.uk/mitigating-the-effects-of-pulsating-flow-in-flow-measurement/ For further information on the Atrato and Metraflow range of ultrasonic flowmeters, please visit: www.flowmeters.co.uk/ultrasonic-flow-meter-selection-chart/ or contact Titan Enterprises on +44 (0)1935 812790 or email: email@example.com
High pressure flowmeter for offshore
Titan Enterprises reports that its High Pressure Oval Gear (OG4) flowmeters provide an ideal solution for applications, within the oil and gas industry, that require a highly accurate and chemically resistant flow measurement device, such as metering high pressure additive injection.
Benefiting from a compact, rugged design, Titan’s OG4 flowmeters are proven to operate reliably even at high pressures, providing long-term performance with minimal maintenance.
Furthermore, Titan’s OG4 flowmeters are able to operate at temperatures up to 150°C and are fully IP67/NEMA 4 compliant. Each OG4 flowmeter comes with a pressure test certificate that verifies the device’s ability to handle pressures up to 700 bar and up to 950 bar for custom-designed models.
With a standard flow range of 0.25 to 50 litre/min on 30cSt oil, OG4 flowmeters are able to regularly achieve outstanding repeatability (0.1%) and accuracy (0.75%).
For oil and gas applications where the presence of strongly acidic or basic chemicals has to be considered, Titan Enterprises is also able to offer a choice of construction materials for the OG4 flowmeter (as well as across its oval gear model range).
Totally non-metallic components and a choice of elastomer seals are options for the standard OG4 flowmeter which aid chemical compatibility. A choice of 316 stainless steel or Hastelloy C is available for the high-pressure range.
For further information on the OG4 flowmeter (and Titan’s full range of oval gear flowmeters) please visit: www.flowmeters.co.uk/og4-pd-oval-gear-flow-meters-positive-displacement-swept-volume-flow-measurement/ or contact Titan Enterprises on +44 (0)1935 812790 or email: firstname.lastname@example.org