Rotameters (Variable Area Flow Meters)

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stubbe rotameter flowmeter limit switches

Rotameters or Variable Area Flow Meters for technically clean fluids are available in a number of different models, involving different tube lengths and connection sizes. Details of these provided below. Standard unit has transparent PVC tube, PVDF non-magnetised float (target), UPVC union ends with solvent weld end connectors to BS/Ansi dimensions.

Note 1: Flow scale is in LITRES PER HOUR and is calibrated using the viscosity and density of water at 20°C.
Note 2: PVC is not recommended for gaseous media
Note 3: DFM 165 = tube length 165mm

DFM 165 3/8” (DN10) Flow range 3-24, 5-60, 10-100, 25-250 (LPH)
DFM 170 1/2” (DN15) Flow range 5-50, 15-150, 25-250, 40-400 (LPH)
DFM 185 3/4” (DN20) Range 15-150, 50-400, 60-600, 100-1,000 (LPH)
DFM 200 1” (DN25) Range 25-250, 40-400, 100-1,000, 150-1,500 (LPH)
DFM 350 1” (DN25) Flow range 15-150, 30-300, 60-600, 100-1,000 (LPH)
DFM 350 1-¼” (DN32) Flow range 150-1,500, 250-2,500 (LPH)
DFM 350 1-½” (DN40) Flow range 200-2,000, 300-3,000 (LPH)
DFM 350 2” (DN50) Flow range 400-4,000, 600-6,000, 1,000-10,000 (LPH)
DFM 350 2½” (DN65) 1,500-15,000, 2,500-25,000, 10,000-50,000 (LPH)

* Options: Different scales (eg LPS, GPM, M³/H), BSP end connectors, alternative tube materials for different media PA, PSU or PVDF, alternative float material 1.4301 (V2A), union ends in PP, PVDF or white malleable cast iron, union O-rings in FPM