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Pressure management

Pressure management based in DMA, which is the economic method to reduce physical loss. During night-time, no need pressure as high as day-time. At the inlet pipe of block,  PRV (pressure reducing valve) installed to reduce night flow which will reduce MNF effectively

MNF(Minimum night flow) analysis


gFlow Instruments co. ltd.
Unit 3A-8, 12/F, Kaiser Centre, 
No. 18 Centre Street
Sai Ying Pun
Hong Kong SAR

Meter audit and renewal

Gflow offers complete service for meter renewal plan and measuring efficiency evaluation. We will provide complete analysis for your revenue meter condition and an ROI optimized meter renewal plan.

Proactive SCADA/software  solution to reduce your Non Revenue Water

DMA is metering management system to evaluate NRW (physical and apparent loss) in block.   At the inlet pipe of block, district meter installed to measure input water volume and compare with revenue water inside block. Then, water loss is assessed for this block.

DMA-District Metering Area

MNF is the inlet flow rate of block at mid-night (usually 2:00AM-4:00AM). MNF is indicator of physical loss. The increased MNF will indicate new leakage happened or something to be identified.