PLAST-O-MATIC Window Sight Flow Indicators

Used for measuring the liquid flow rates, through a closed system, at a maximum line pressure of 200 psi. Feature sensors with switches to initiate the alarm, activate other equipment or shut the system. Integrated with a PVC constructed screen for quantitative readout

Working Mechanism

• These devices rely on the difference between two pressures to function (delta-P).
• As flow is established through the variable orifice that is created between the spring-biased metering cone and the end cap that the cone rests in, developing delta-P.
• The cone can move linearly in relation to the delta-P due to the variable orifice. A follower magnet is rotated by a magnet on the metering cone which moves together with the cone in a chamber next to the fluid cavity.
• To deliver gauge readings proportional to flow, the gauge pointer is positioned at the end of the rotary magnet shaft and spins with the magnet.
• Between the flow chamber and the rotary chamber, there are no mechanical seals. It is attained by coupling forces between two neighbouring magnets through a solid wall.