AUTOMATED
CONSTANT
SPRAY
CONTROL
PRECISION SPRAY WITHOUT WATER WASTE
Designed to distribute water to a road surface in a controlled manner, ETT’s CDR (Constant Deposition Rate) Spray Head maintains a spray pattern with minimal variation in width and deposition rate. Parameters such as pump speed, pressure and ground speed are taken into account to achieve consistent spray coverage, regardless of the truck travel speed.
The CDR Spray System ensures that the correct droplet size is achieved across the entire flow range. Conventional spray systems cannot achieve this and regularly emit droplets too big that create pools, or droplets too small that are more susceptible to wind.
EVEN GRADIENT SPRAY
Traditional spray systems are prone to spraying excessive water on sloping gradients, thereby increasing the risk of large mining vehicles sliding. By comparison, the CDR Spray Head ensures an optimal amount of water is sprayed onto the ramp, which ensures no water pooling or uneven distribution of water.
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Meet the Team
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WHAT MAKES THE CDR SPRAY SYSTEM SUPERIOR TO CONVENTIONAL SPRAY SYSTEMS?
• All 304 stainless steel components with phosphor bronze piston
• This is the only commercially available spray head with continuously variable nozzle aperture
• Hydraulically balanced piston creates the variable nozzle aperture
• Laminar flow is maximized right up to the aperture
• Fully adjustable: left/right, up/down
• Flow rates 700-2500 litres per minute with excellent droplet size and distribution
• IR road temperature measurement and compensation
• Geofencing, traffic sensing, and tanker position inputs for automatic spray control
• Autonomous-ready, no operator decisions required
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AUTOMATED CONSTANT SPRAY CONTROL
The CDR Spray Head provides a consistent, predetermined water deposition rate including over a consistent spray width, regardless of engine speed and road speed. With automated constant spray control, water distribution remains even with zero pooling and significantly reduced road damage, regardless of the truck engine speed or road speed.
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HOW DOES CDR WORK?
The ETT CDR Spray System, in its basic form, controls two important factors.
1. The hydraulic pump speed and the spray nozzle orifice.
In CDR-V, the nozzle orifice is continuously variable as is the pump speed, both independent of the truck engine speed. Basically, changing these two variables allows full control of the spray flow and pressure and consequently droplet size, throw and spray width.
2. Measurement of the vehicle road speed to select your water deposition rate.
These variables, when correctly controlled, provide the solution that is required to automatically prevent under- or over-watering of haul roads.
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CDR-V ENHANCEMENTS
In CDR-V, there are some enhancements available.
1. The infra-red road temperature measurement. An increase in the road temperature means an increase in the deposition rate.
2. Incline measurement. This option continuously monitors the slope of the road and allows lower deposition rate on inclines or declines.
3. Geofencing and GPS. A very sophisticated system whereby historic spray routes are used to switch the spray, thereby ideal for autonomous trucks.
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VS CONVENTIONAL ON/OFF SPRAY SYSTEM
Conventional spray systems provide little-to-no control of precise water deposition. With the hydraulically driven pump dependent on engine rpm, the pump flow rate provides an inconsistent spray; and conventional nozzles offer no automatic orifice adjustment. Therefore, the spray width cannot be kept constant.
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SAFE ASCENTS AND DESCENTS
The ETT Intermittent Spray function ensures safe ascent and descent on steep gradients for heavy vehicles by minimizing potential wet road slipping segments thereby creating strategic dry road intervals.