What pressure should a sprayer run at?

Running from 40-80 PSI usually. As crw said, the controller will try to match the pump to your ground speed by changing the speed of the pump. That will of course affect the pressure at the nozzles. Lower pressures should mean courser droplets, high pressure = finer droplets.

What is a PWM sprayer?

Pulse width modulation (PWM) is a spraying system where the flow rate is controlled by a pulsing solenoid at each nozzle, unlike a standard spray system that directly controls the overall flow rate.

What affects the application rate of a sprayer?

As is true for all sprayers used for application of chemicals, application accuracy with backpack and hand can sprayers is affected by travel speed, nozzle type, and spray pressure. A higher travel speed will result in a lower application rate.

How much PSI does a pump sprayer have?

The hand held sprayer has a plastic compression pump that is sealed with rubber O-rings. The compression pump is hand actuated to an operating pressure of 40 PSI.

How many PSI is a boom sprayer?

Generally, the operating pressure for a typical boom-sprayer ranges from 15 to 80 psi. Most nozzles tend to produce a greater volume of spray in finer droplets at higher operating pressures.

How many nozzles do I need for a 36m sprayer?

The six nozzles are handy for those operators switching between different chemicals and fertiliser. A 36m boom with Exact Apply installed costs an extra £25,700.

Why do you calibrate your sprayer?

Sprayer calibration provides the information you need to determine the amount of spray solution (both pesticide and carrier) being applied per acre. This information can help ensure you’re applying the amount of solution stated on the product label.

How does a rate controller work on a sprayer?

A rate controller needs to know the boom width (entered by the user), the total spray liquid flow rate (from a flow meter), and the sprayer speed (gps, radar). It controls the spray liquid pressure by opening or closing a bypass valve.

How do you increase the flow rate of a sprayer?

As we increase spray pressure, flow rate increases with a square-root relationship. This means that in order to double the flow rate, we need to increase spray pressure by a factor of four. Figure 2 shows three different flow rate tips, each applying 10 US gpa at a range of travel speeds.

What is an automatic rate controller?

Automatic rate controllers are standard equipment on almost all new sprayers. They ensure consistent application volumes, but they don’t do all the thinking for you. We explore how to make them work properly.

What is the most important factor when choosing a sprayer?

Of these, the most critical is spray pressure. Pressure affects the flow rate of the nozzle, the spray pattern (fan angle) and the spray quality (droplet size range). The last two of these affect coverage, overlap, and spray drift, so it’s important to get them right.