Start with your target geometry and what the spray needs to do. Flat fan for surfaces requiring directed impact in a linear strip — washing, coating, descaling. Full cone for circular coverage with no center dead zone — cooling, rinsing, fire wetting. Hollow cone for ring-pattern coverage at low pressure — FGD absorbers, gas cooling, humidification. Solid stream for maximum throw distance or concentrated impact — tank cleaning, venturi scrubbers, heavy scale removal. Spiral for high-solids slurry where any orifice would clog.

See the Spray Pattern Guide for diagrams, spec grids, and a 5-column comparison table.

Use the square root pressure law: Q₂ = Q₁ × √(P₂ ÷ P₁). Find the catalog flow rate (Q₁) at the catalog pressure (P₁) on the product datasheet, then substitute your operating pressure (P₂) to get your expected flow (Q₂).

Example: a nozzle rated 2.0 GPM at 40 PSI running at 60 PSI → Q₂ = 2.0 × √(60/40) = 2.0 × 1.225 = 2.45 GPM.

Use the Flow Rate Estimator to calculate this automatically, or see the full Flow Rate & Pressure Guide for worked examples and a 10-row reference table.

Coverage width at the target surface is W = 2 × D × tan(θ ÷ 2), where D is mounting height and θ is the full spray angle. Nozzle center-to-center spacing is S = W × (1 − overlap fraction), where a 10–15% overlap is standard for most cleaning and cooling applications.

The Spray Area Planning Tool handles all this automatically — enter angle, height, total width, and overlap to get nozzle count, C-to-C spacing, and a live coverage diagram. The Spray Angle Guide covers angle selection tradeoffs in detail.

Yes — that's exactly what we're here for. Call (650) 375-7002 or use the contact form and tell us: what you're spraying, what the liquid is, your supply pressure and available flow rate, the distance from nozzle to target, and what you need the spray to accomplish. We'll identify the right nozzle type, spray angle, orifice size, material, and connection for your conditions.

Often yes. Provide the existing nozzle's part number, connection size, spray angle, and catalog flow rate and we can identify a NozzlePro equivalent or near-equivalent. In most cases we can match connection type, flow rate at the original operating pressure, and spray angle. Contact our team with the original nozzle's specifications and we'll confirm compatibility before you order.

Body materials: Brass (clean water, general use), 303 SS (sanitary, food-adjacent), 316L SS (corrosive environments, food processing, marine), PVDF (HF, concentrated NaOCl above 10%, strong solvents), Polypropylene (mild acids, cost-sensitive), Hastelloy C-276 (strong oxidizing acids, high-chloride, seawater). Tungsten carbide orifice inserts for abrasive slurry service.

Seal materials: PTFE (universal chemical resistance, high temperature), Viton/FKM (petroleum, fuels, acids, oxidizers), EPDM (hot water, steam, alkaline), Buna-N (general water service, oils).

See the full Material Selection Guide for a chemical environment quick-reference table.

It depends on concentration. For dilute NaOCl below approximately 10% (typical sanitation and CIP concentrations), 316L stainless steel body with PTFE or Viton seals is the standard choice and performs reliably in most food and beverage sanitation applications.

For concentrated bleach above 10% or continuous high-concentration NaOCl exposure, PVDF body with PTFE seals is the correct choice — stainless steel corrodes rapidly at high NaOCl concentrations. Call us with your specific concentration and temperature to confirm the right material combination.

Temperature limits depend on both body material and seal material — the lower of the two determines the usable range. As general guidance: brass and stainless steel bodies handle high temperatures well (up to 400°F+ for the metal itself), but seal material limits the practical range. PTFE seals allow the highest temperatures (up to approximately 450°F). EPDM handles steam and hot water to about 300°F. Viton is rated to approximately 400°F. Buna-N should stay below 200°F.

PVDF bodies are limited to approximately 275°F. Polypropylene bodies should stay below approximately 200°F. For high-temperature applications above 250°F, contact us with your specific conditions to confirm the right combination.

Yes — the Material Selection Guide includes a quick-reference compatibility table covering common industrial chemicals against our standard body and seal materials. For an unlisted chemical or a specific concentration and temperature combination, contact our team and we'll advise based on the chemistry involved.

Yes. We engineer custom nozzle headers to your specific pipe length, nozzle spacing, connection type, nozzle type, and material. ProJet 3X Modular Units provide scalable configurations for larger installations. Pro-Quick Connect Assemblies are available for applications requiring tool-free nozzle changeouts — useful for regular nozzle replacement programs or applications with multiple nozzle types in rotation.

To get a quote, contact us with: pipe length, nozzle type and spray angle, center-to-center spacing, connection size at each end, body and seal material, and operating pressure and flow rate. Call (650) 375-7002 or use the contact form.

Yes — provide the original manifold's dimensions, nozzle type and spacing, connection sizes, and operating conditions and we will match or improve the original specification. For OEM replacement applications where dimensional interchangeability is critical, send us a drawing or photo of the existing assembly along with the operating parameters and we'll confirm compatibility before production.

Lead time for custom assemblies depends on complexity, material availability, and current production schedule. Contact our team before placing the order — we'll confirm the lead time for your specific configuration. For time-sensitive projects, let us know your required delivery date upfront and we'll advise on feasibility.

Higher than rated flow (above ~110% of rated): Orifice wear. The orifice has enlarged — a 10% increase in orifice diameter causes approximately 21% higher flow because flow scales with the area, not the diameter. Cleaning will not restore a worn orifice. Replace the nozzle.

Lower than rated flow (below ~90% of rated): Clogging or scale buildup is restricting the orifice. Remove the nozzle and clean it. Check whether the liquid contains particles above the nozzle's free passage rating and consider adding filtration upstream.

The definitive diagnostic is timed collection: collect output for 30 seconds at your design supply pressure and compare against rated flow × 0.5 min.

Common causes of uneven spray pattern, in order of likelihood: Partial clogging — one side of the orifice is partially blocked; remove and clean. Worn orifice — asymmetric wear deforms the spray sheet; replace the nozzle. Operating below minimum pressure — flat fan nozzles require a minimum pressure to develop a coherent sheet; check your supply pressure at the nozzle inlet under operating flow. Wrong nozzle for the application — some patterns require a minimum distance from the nozzle to the target to fully develop.

If cleaning doesn't resolve the issue and pressure is within spec, the nozzle likely has asymmetric orifice wear and should be replaced.

Common conversions: 1 PSI = 0.0690 bar | 1 bar = 14.50 PSI | 1 GPM = 3.785 L/min | 1 L/min = 0.264 GPM.

Use the Pressure Conversion Tool for instant PSI ↔ bar ↔ kPa ↔ MPa conversion, or the Unit Conversion Tool for all seven unit categories including flow, length, temperature, density, and viscosity.

Replacement intervals depend on orifice material, operating pressure, liquid abrasiveness, and duty cycle — there is no universal answer. In clean water service at moderate pressure, stainless steel nozzles can run for years. In abrasive slurry service at high pressure, even tungsten carbide inserts may need replacement within months.

The practical approach is to measure flow rate periodically (timed collection test) rather than replace on a fixed schedule. Replace when the measured flow exceeds 110% of rated — this indicates measurable orifice wear. In applications where replacing slightly early is far cheaper than the cost of process disruption, some operations use a fixed schedule based on their history with that specific service.

Most NozzlePro nozzles use NPT (National Pipe Taper) threads — the most common industrial pipe thread standard in North America. Standard sizes are 1/8" NPT, 1/4" NPT, 3/8" NPT, and 1/2" NPT depending on the nozzle model and flow range.

NPT threads seal on the taper — use PTFE tape (2–3 wraps in the direction of thread engagement) on the male threads for a reliable seal. Do not over-torque. See the Thread & Connection Guide for NPT dimensions, identification method, and sealing instructions.

Yes. NozzlePro holds ISO 9001:2015 certification from Bureau Veritas covering the design and manufacture of industrial spray nozzles and spray system components at our Burlingame, California facility. The certification covers our full quality management system including design control, incoming material inspection, in-process quality checks, finished goods inspection, and corrective action processes.

See the Certifications & Compliance page for the full scope of what our certification covers and what it does not.

No — for security reasons relating to our manufacturing facilities, NozzlePro does not distribute copies of the ISO certificate or supporting quality documentation externally. The certification exists and is current and is audited by Bureau Veritas. If your supplier qualification program requires a certificate copy and cannot accommodate this policy, contact our team and we can discuss whether a written confirmation on company letterhead would satisfy your process.

No. NozzlePro's only certification is ISO 9001:2015 — a manufacturing process certification. We do not hold product certifications of any kind, including NSF/ANSI, 3-A Sanitary Standards, FDA product listing, ATEX, CE, RoHS, or any similar mark.

ISO 9001 is a process certification covering our quality management system — it certifies how we manufacture, not that the products themselves have been tested and approved to a specific product standard. If your application requires products with a specific product certification, that requirement needs to be confirmed before purchasing. See the Certifications & Compliance page for full detail on what our quality system does and does not cover by industry.

Certificates of Conformance and material certifications may be available for specific orders. Contact our team at the time of purchase to discuss your documentation requirements — what's available depends on the specific product and the documentation our suppliers provide for incoming materials. We do not guarantee CoC or material certification availability for all products or all orders.