How to Match Ersa-Compatible Nozzles Without Original Part Number

Not having the original part number for your selective soldering nozzle does not mean you cannot order a compatible replacement. This guide explains how to identify and match the correct aftermarket compatible nozzle using dimensions, photos, machine model information, and other methods when the part number is unknown.

Key Takeaways

**Three dimensions identify any nozzle** — ID/AD, height (H), and base type

**Machine model narrows the search** — VERSAFLOW, ECOSELECT, SMARTFLOW each use specific base types

**Photos provide identification without measurements** — clear photos with scale reference

**Old nozzle comparison works** — send your worn nozzle for direct matching

**Custom manufacturing fills gaps** — when no standard configuration matches your dimensions

Why Part Numbers Are Sometimes Unavailable

There are several common reasons you may not have the original part number:

ReasonFrequencySolution

|---|---|---|

Documentation lostCommonUse dimensions or photos Nozzle marking worn offCommonMeasure dimensions, photograph New machine without recordsOccasionalCheck machine manual, measure sample nozzle Inherited production lineOccasionalInventory existing nozzles, photograph each Custom nozzle without documentationRareSend old nozzle or drawing for matching

Ersa, VERSAFLOW, ECOSELECT, SMARTFLOW and other brand names are used for compatibility reference only. Our aftermarket compatible nozzles are designed to match the specifications of the original nozzle configurations.

Method 1: Identify by Dimensions

The three critical dimensions that uniquely identify a nozzle configuration are:

Step-by-Step Dimension Identification

1. **Measure the ID (Inner Diameter)** — Use calipers to measure the opening at the nozzle tip

2. **Measure the AD (Outer Diameter)** — Use calipers to measure the overall width at the tip

3. **Measure the Height (H)** — From the base seating surface to the top of the nozzle tip

4. **Identify the base type** — Check your machine model or examine the base thread pattern

With these four values, you can search the nozzle catalog for the matching configuration:

ID/ADHeightBase TypePart Number Match

|---|---|---|---|

3.0/6.0H=47B14.1/B22114609 4.0/8.0H=47B14.1/B22114611 6.0/10.0H=47B14.1/B22114613 8.0/12.0H=47B14.1/B22118615 3.0/6.0H=47B16.1/B366isk47957020a 4.0/8.0H=47B16.1/B366isk47957022a

Measurement Tips

DimensionMeasurement MethodAccuracy Tip

|---|---|---|

IDInner jaw of digital caliperMeasure at the very tip opening ADOuter jaw of digital caliperMeasure at the widest point of the tip HeightDepth gauge or rulerFrom base seat surface, not bottom of base Base typeVisual comparison or machine modelCompare thread pattern to known base types

Method 2: Identify by Machine Model

If you know your machine model but cannot measure the nozzle, the machine model alone can narrow the search:

Machine SeriesBase TypeCommon Configurations

|---|---|---|

VERSAFLOW 1/2/3B14.1/B2290+ nozzle options VERSAFLOW 4 (specific models)B16.1/B3618 nozzle options ECOSELECT seriesB14.1/B22 (most)Standard configurations SMARTFLOWB14.1/B22 or B16.1/B36Check your specific model

Knowing the machine model confirms the base type, and then you only need the ID/AD and height to identify the exact nozzle.

Method 3: Identify by Photo

When you cannot measure dimensions precisely, clear photographs can provide the information needed for matching. See our [Photo Request Guide](/technical-guides/how-to-request-selective-soldering-nozzle-by-photo) for detailed photo instructions.

**Minimum photo requirements**:

Top view showing ID opening

Side view showing height and profile

Base view showing thread pattern

Scale reference (ruler) in at least one photo

Method 4: Send the Old Nozzle

If you have the old nozzle available, the most reliable method is to send it directly to the supplier for matching. The supplier can:

Measure all dimensions precisely

Identify the base type from the actual thread pattern

Determine the original ID/AD specification (even if the nozzle is worn)

Recommend the correct aftermarket compatible replacement

Identify any wear patterns that may affect nozzle selection

Method 5: Custom Nozzle Manufacturing

If none of the standard configurations match your dimensions, a custom nozzle can be manufactured to your exact specifications:

From your measured dimensions

From your photographs with scale reference

From your old nozzle sample

From your engineering drawing

See our [Custom Nozzles Guide](/technical-guides/custom-selective-soldering-nozzles-by-drawing-or-sample) for details.

Comparison of Identification Methods

MethodAccuracySpeedEquipment Needed

|---|---|---|---|

Part numberExactFastestJust the number Dimensions (calipers)HighFastDigital calipers Machine model + dimensionsHighFastMachine info + calipers Photos with scaleMediumMediumCamera, ruler Old nozzle sent to supplierExactSlower (shipping)The old nozzle itself Custom from drawingExactSlowestEngineering drawing

Related Products

[B14.1/B22 Nozzles](/products/b14-1-b22-nozzles) — Full catalog searchable by dimensions

[B16.1/B36 Nozzles](/products/b16-1-b36-nozzles) — Full catalog searchable by dimensions

[Part Number Lookup](/part-number-lookup) — Search by part number or dimensions

[Custom Nozzles](/technical-guides/custom-selective-soldering-nozzles-by-drawing-or-sample) — When standard sizes do not match

Need Help Matching Your Nozzle?

[WhatsApp us](https://wa.me/8615706606161) your dimensions, photos, or machine model for immediate nozzle identification, or [Request a Quote](/contact) through our online form.