Viscous Media

We specialise in the design, manufacturing and supply of a wide range of flow meters here at Litre Meter, stocking applications suitable for all kinds of materials and job specifications.
As all fluids have different characteristics, some are better suited to certain flow meters than others. Finding the best flow meter for the job is influenced by the flow’s properties; its given pressure, temperature, temperature, density, conductivity and composition, for example.
Our wide selection offers a number of applications that are suited to measuring viscous media, designed to avoid common problems of high viscosity materials like sticking to surfaces. When it starts to stick, this causes the movement of the liquid to slow down and become inconsistent, leading to inaccurate readings.
However, there are certain types of flow technology that aid the movement of the liquid, including:

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Rotary Piston Meter

Positive displacement flowmeters, also known as PD meters, measure volumes of fluid flowing through by counting repeatedly the filling and discharging of known fixed volumes. A typical positive displacement flowmeter comprises a chamber that obstructs the flow. Inside the chamber, a rotating/reciprocating mechanical unit is placed to create fixed-volume discrete parcels from the passing fluid. In the VFF the rotor is basically a disc shape with an annular groove on its underside capable of holding and transporting flow from the chamber inlet to the outlet i.e. a rotary piston. The units are manufactured in 316 stainless steel or titanium. They can measure pulsing flows. Suitable for a wide range of adhesives and epoxies. 0.01 to 33,000 l/hr. +/-0.5% accuracy, +/-0.25% repeatability.

Vortex240-1-1

Vortex Mass Meters

Vortex and other types of ‘oscillatory’ flow meters utilize the behaviour fluid oscillations in order to derive flow rate. This technology works by inducing fluctuations in the fluid properties such as pressure, density or viscosity which can be converted into a flow rate. These flowmeters are normally calibrated on water. No moving parts and relatively tolerant to particulate flow these find many applications where temperatures are high or where other more traditional flowmeter technologies are out of spec. +/- 1.5% rate, 1/2″ to 8″ and insertion.

 

Helical Screw Meter

Positive displacement flowmeters, also known as PD meters, measure volumes of fluid flowing through by counting repeatedly the filling and discharging of known fixed volumes. A typical positive displacement flowmeter comprises a chamber that obstructs the flow. Inside the chamber, a rotating/reciprocating mechanical unit is placed to create fixed-volume discrete parcels from the passing fluid.

The helical screw principle uses 2 counter rotating gears to form a continuous constant volume cavity. The SRZ is a stainless steel version suitable for high viscosity and abrasive media flow metering. 0.04 to 400 litres per minute, +/-0.1% accuracy, +/-0.05% repeatability. Housing in 316L and 303 with screws in 1.4122 (430), tungsten carbide bearings and FKM or PTFE seals. Pressures to 400 bar, -40°C to 150°C.

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