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• Maximise gland packing life through carefully controlled gland-water flow
• Minimise dilution of slurry
• Ensure availability of gland-water to all glands on a common gland-water line
• Minimise wastage of available packing water supplies
• Control flow rate for a variety of other uses - including safety showers and eye washing equipment, pump protection, dust suppression, or fire fighting

• Encourage payment of overdue water bills
• Improve mains distribution pressure
• Extend water meter life
• Enable agreed maximum flow to consumers tanks.
• Enable economical distribution to sparsely populated areas
• Enforce water restriction
• Reduce infrastructure costs

• Prevent media loss during back-flushing
• Protect delicate filters from excessive flow rates
• Control of service water flow through delicate filters.
• Enable controlled flow rate of sampling water to analysing equipment
• Ensure 100% bacteria kill in ultraviolet water sterilisation
• Control flow of carrier water to coupon rack in cooling tower, water treatment installations

• Vacuum Pumps "Liquid Ring" - operator convenience, prevent overheating and overloading
• Fire-fighting – guarantee pressure and flow to all hydrants, control flow of water and foaming agent to ensure correct dose ratio
• Dust Suppression - minimise dust and erosion
• Distilleries - ensure correct cooling of condensers
• Safety showers & eye-wash equipment - ensure safe operation

• Centrifugal Pump Protection
• When an authority enforces limits to, (or reduced) pumping rates, with a non-adjustable valve
• Preventing electric motor overload 
• Preventing nuisance low-pressure motor tripping
• Fertiliser dosing for irrigation
• Vitamin dosing for stock

Extend pump life by:

• Keeping pump on its curve by limiting maximum flow rate
• Prevent up-thrust damage (common on high draw-down submersibles)
• Prevent cavitation damage
• Prevent over-pumping beyond the supply capacity
• Maximise gland packing life through carefully controlled gland-water flow

• Showers - water conservation and energy savings
• Drinking fountains - controlled stream
• Toilet cisterns - Prevent "continuous flush" operation if fill rate is too fast
• Water hammer prevention
• Keep flow below a pre set maximum to ensure gas & electric instantaneous heaters can heat to a sufficiently hot temperature