Oval gear monitors - Delimon - #1

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Oval Type Flowmeter - 10/A/01-A - October 2005 DELIMON Cooling, Ramsden Court, Ramsden Road, Rotherwas Industrial Estate, Hereford, HR2 6LR, UK. Tel: +44 Oval Type Flowmeters Description Oval type flow meters are a complete flow measurement and monitoring system for re-circulating oil systems. The method of measurement is based on the rotation of special oval designed gears – the speed of which changes in proportion to the flow of oil through the meter. This gives a visual indication of the flow rate through the transparent cover and also sends electrical pulse signals to an electronic monitor or PLC to provide actual flow figures. This also provides information to allow either low or high flow monitoring to be provided. Benefits Measurement is independent of viscosity and therefore a real flow will be indicated throughout the temperature range. Pressure drop through the flow meter is relatively low. The flow meter is designed to pass a small flow even if the gears are prevented from turning due to solid particles contained in the oil. This prevents complete starvation of oil to bearings etc. Operation Their oval design and the flow of oil passing through the meter affect the rotation of the gears. The differential pressure within the meter produces a rotational force A/B = F1/F2 (0)1432 365000. Fax +44 (0)1432 365001. Web: www.delimon.co.uk. Where: A = the largest radius of the oval gear B = the smallest radius of the oval gear F1 = the force caused by radius A F2 = the force caused by radius B Oil flows around the outside of the two gears that mesh in the centre. The proximity sensor produces two pulses per operation of the gear. An adjustable needle valve is incorporated into the design to allow the flow rate to be set. This valve is viscosity sensitive so that during cold start-up conditions, there will be a reduced oil flow through the meter.