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Water-driven chemical injectors

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WATER-DRIVEN injection technology provides economic and environmental benefits to industry. Water-driven chemical injectors should be considered whenever there is a need to dilute a liquid concentrate into a flow of water. This technology uses the flow of the water to drive a motor, which in turn operates a dosing mechanism that injects the chemical into the water, requiring no electricity. These injectors are available from Dosmatic .

Advantages of using water-driven chemical injectors include - they can be used where there is no electricity or where electrical circuitry is at risk of water damage; they are generally cheaper than electric models and have minimal running costs; and from an environmental perspective, water-driven injectors reduce chemical handling as the chemical can be sucked directly from the original chemical container which should minimise spillage.

To ensure minimum chemical compatibility issues, it is best to use injectors that either remotely inject the chemical downstream of the injector or have mixing chambers which are independent of the motor mechanism, according to Dosmatic. This is because some injectors mix the chemical with the water within the motor mechanism, providing good mixing but possibly causing problems with chemical compatibility, as most manufacturers use motors constructed with Nylon derivatives.

Not all water-driven injectors dose the chemical proportionately, that is, for every packet of water that passes through the injector, that packet is injected with a precise quantity of chemical. If accuracy is important, a proportional injector should be used. Most injectors on the market will inject between 1:100 and 1:20 at varying degrees of accuracy. The more technologically advanced brands have the capability of accurately injecting at ratios as low as 1:4000 and as high as 1:10.

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