Venturi effect in Brightwell solutions
Our equipment features the best technology to deliver the best possible performance and provide the solutions the market needs. In the case of chemical dilution equipment and spraying systems, this is the Venturi system, which applies the laws of physics and fluid dynamics to operate.
What the Venturi effect is
At its core, the Venturi effect describes how fluid behaviour changes when it flows through a constricted section of pipe. According to fluid dynamics principles (stemming from Bernoulli’s equation), when a fluid travels through a narrower channel, its velocity increases and its pressure decreases.
This pressure differential is the key to inducing fluid from a secondary source without using mechanical pumps, and it is the basis for our products.
How the Venturi system works in Brightwell products
In Brightwell’s dosing and spray systems, the Venturi device acts as a self-powered injector:
- Water flows through the Venturi constriction — typically driven directly by mains water at standard pressures.
- Velocity increases and static pressure drops at the Venturi throat.
- This creates a vacuum suction zone, which pulls chemical concentrate into the water stream without moving parts or external pumps.
- Chemical mixes with water immediately and proportionally, based on the geometry of the Venturi and calibration of the system.
This process ensures a consistent solution every time, without electricity or complex controls.
Where Brightwell uses Venturi technology
1. Chemical dilution systems
EcoMix and EcoMulti series use Venturi injectors to draw precise volumes of concentrated chemicals into a mains water flow. These systems:
- Deliver predetermined dilution ratios.
- Are configurable for multiple chemicals from a single point.
- Feature backflow prevention to protect the water supply.
2. Spray & Foam systems
Venturi-based injectors are also at spray and foam applicators:
- In EcoSprayer systems, a venturi injector mixed with a stainless steel nozzle delivers a precise spray pattern for surface cleaning.
- EcoFoam stations incorporate Venturi injectors to introduce foam agents into water for improved cleaning action.
These systems rely on the same underlying effect: creating suction via water flow to entrain and mix chemical concentrate consistently and efficiently.
Advantages of the Venturi system
No moving parts
Venturi injectors have no motors or moving valves, which dramatically reduces wear, potential downtime, and servicing costs.
Consistency & safety
Because the dilution ratio is governed by fluid physics rather than mechanical metering, the results remain repeatable and reliable. Built-in backflow prevention adds safety for potable water connections.
Flexibility
Different models cater to varying flow rates and applications — from compact single chemical dosing to systems handling multiple chemicals simultaneously, and with flow rate differences (high, low, or both at the same time)
Minimal maintenance and installation cost
Because the Venturi injector operates without moving mechanical components, motors, seals, or dynamic wear parts, there is minimal mechanical fatigue and virtually no risk of pump failure or electrical malfunction.
Installation is simplified due to the absence of power supply requirements, control panels, or calibration electronics.
Technical considerations
To achieve consistent performance, Venturi systems must be matched to the appropriate water pressure range. For example, Brightwell proportioners typically operate within a specific pressure window (e.g., 2–5 bar), ensuring sufficient velocity through the Venturi to draw chemical effectively without causing cavitation or inconsistent dosing.
Backflow Prevention
To protect potable water systems, Brightwell systems incorporate backflow preventers and check valves at the suction port — ensuring no reverse migration of chemical into supply lines.
