Venting Liquid-Filled Pressure Gauges

Liquid-Filled or Dry? Small-plot agricultural sprayers should have a pressure gauge on the wand or boom to ensure accurate application rates. Most are added after-market and the operator has the choice of buying liquid-filled or dry gauges. Glycerine- or silicone-filled gauges are preferred because they dampen pressure spikes, pulsation and mechanical vibration. Compared to dry […]

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Pressure spikes and relief valves on air-assist sprayers

A properly-sized pump should produce more flow than is needed and work in conjunction with the atomizers to regulate that flow. Typical to high pressure pumps, a piston relief valve (aka regulator) should maintain the desired system pressure through the normal speed range of the sprayer, regardless of the number of booms (or boom-sections) that […]

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Is Your Pressure Gauge Accurate?

AAMS-SALVARANI Gauge tester

Here’s an oldie-but-a-goodie filmed in New Hampshire in June, 2014. It’s something to keep in mind when you’re getting your sprayer ready for spring service. We were at a train-the-trainer event when someone asked: If pressure is critical to spray quality and rate, how do you know if your gauge is accurate? A great question, […]

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Does Higher Pressure Increase Spray Penetration?

This is a coarse droplet - seriously.

A very common question we hear at sprayer demonstrations is: “I want to drive the spray deeper into the canopy – does higher pressure help?” Well, here’s the classic government answer: “…yes and no.” It depends on two things. First, the size of the droplet and second, your tolerance for drift (ours is almost zero, […]

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The Pressure Gauge Shows More Than Pressure

A sick pressure gauge might be trying to tell you something...

Kim Blagborne (formally with Slimline Manufacturing) has long said that the pressure gauge on an airblast sprayer indicates more than just pressure. It can be used to diagnose a number of pump and plumbing issues… if you know what to look for. Here’s Kim’s troubleshooting guide to reading into what your gauge is REALLY telling […]

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