Airless Sprayer Tip Size Calculator

ANA›Life Services Authority›National Calculator Authority›Airless Sprayer Tip Size Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Airless Sprayer Tip Size Calculator

Determine the correct airless sprayer tip size based on your desired spray fan width and flow rate (GPM). Tip codes are read as: first digit × 2 = fan width (inches), last two digits = orifice size (thousandths of an inch).

Desired Spray Fan Width (inches)

Required Flow Rate (GPM)

Operating Pressure (PSI)

Material Type

Water / Stains / Thin Lacquers Latex Paint (Standard) Heavy Latex / Elastomeric Texture Coatings / Thick Materials

Calculate Tip Size

function airCalc() { const fanWidthEl = document.getElementById('air-fan-width'); const flowRateEl = document.getElementById('air-flow-rate'); const pressureEl = document.getElementById('air-pressure'); const materialEl = document.getElementById('air-material'); const resultEl = document.getElementById('air-result');

const fanWidth = parseFloat(fanWidthEl.value); const flowRate = parseFloat(flowRateEl.value); const pressure = parseFloat(pressureEl.value); const viscFactor = parseFloat(materialEl.value);

// --- Validation --- resultEl.style.display = 'block'; resultEl.className = 'calc-result';

if (isNaN(fanWidth) || isNaN(flowRate) || isNaN(pressure)) { resultEl.innerHTML = '⚠ Please fill in all numeric fields.'; return; } if (fanWidth 24) { resultEl.innerHTML = '⚠ Fan width must be between 4 and 24 inches.'; return; } if (flowRate 3.0) { resultEl.innerHTML = '⚠ Flow rate must be between 0.05 and 3.0 GPM.'; return; } if (pressure 3500) { resultEl.innerHTML = '⚠ Pressure must be between 500 and 3500 PSI.'; return; }

// --- Tip Code First Digit (fan width digit) --- // Fan width digit = fan width (inches) / 2 const fanDigit = Math.round(fanWidth / 2);

// --- Orifice Size Calculation --- // Industry formula: GPM = Cv × sqrt(ΔP) // For airless tips: GPM ≈ 0.0009 × orifice² × sqrt(PSI) // Solving for orifice (in thousandths): orifice = sqrt(GPM × viscFactor / (0.0009 × sqrt(PSI))) // Adjusted flow for material viscosity const adjustedFlow = flowRate * viscFactor; const orificeRaw = Math.sqrt(adjustedFlow / (0.0009 * Math.sqrt(pressure))); // orificeRaw is in inches; convert to thousandths const orificeThousandths = orificeRaw * 1000;

// Round to nearest standard tip size (increments of 1 thou, common sizes: 9,11,13,15,17,19,21,23,25,27,29,31,33) const standardSizes = [9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45]; let closestSize = standardSizes[0]; let minDiff = Math.abs(orificeThousandths - standardSizes[0]); for (let i = 1; i ' + 'Recommended Tip Code' + '' + tipCode + '' + 'Fan Width Digit' + '' + fanDigit + ' (fan = ' + (fanDigit * 2) + ' in)' + 'Orifice Size' + '.' + String(closestSize).padStart(3,'0') + '" (' + closestSize + ' thou)' + 'Calculated Raw Orifice' + '' + orificeThousandths.toFixed(2) + ' thou' + 'Actual Flow Rate at ' + pressure + ' PSI' + '' + actualGPM.toFixed(3) + ' GPM' + 'Approx. Spray Rate' + '' + sprayRateSqFtMin.toFixed(0) + ' sq ft/min' + 'Estimated Tip Life' + '~' + tipLifeGallons.toLocaleString() + ' gallons' + '' + 'Tip code ' + tipCode + ': fan width = ' + (fanDigit*2) + ' in, orifice = .' + String(closestSize).padStart(3,'0') + '"

'; }

#### Formulas Used

Tip Code: First digit = Fan Width (in) ÷ 2  |  Last two digits = Orifice size in thousandths of an inch

Orifice Size (thou): orifice = √( GPM × ViscosityFactor / (0.0009 × √PSI) ) × 1000

Actual Flow Rate: GPM = 0.0009 × orifice² × √PSI / ViscosityFactor

Spray Rate: sq ft/min = GPM × (400 / ViscosityFactor)

Tip Life: Gallons = orifice_thou × 40

#### Assumptions & References

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References

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