By ERRASONVET
Buyer summary: The five listed configurations have liner lengths of 293, 293, 325, 318 and 148 mm, with matched-shell reference lengths of 140, 155, 147, 148.8 and 108 mm respectively. The two 293 mm liners have different drawing dimensions. A shared liner length does not establish interchangeability.
A replacement enquiry that gives only the liner's overall length can leave important differences hidden. Two of the ERRASONVET products in this guide both measure 293 mm, but their listed shell lengths and drawing diameters differ. Use the liner and shell information together to identify the configuration you want a supplier to review.
Prepare a liner quotation request
Compare five liner and shell dimension sets
Drawing diameters below retain the product-record labels. Do not assign them to mouthpiece, tail or connection positions without checking an annotated drawing. Material and vent details apply only to the row where they are listed.
| Product | Liner length | Liner drawing diameters | Matched shell length | Matched shell drawing diameters | Material | Vent configuration |
|---|---|---|---|---|---|---|
| 293 mm Milking Liner for 140 mm Shell ERV-DF-LIN-00011 |
293 mm | 24 / 22.4 / 8 mm | 140 mm | 44 / 20 mm | Not listed; confirm | Not listed; confirm |
| 293 mm Milking Liner for 155 mm Shell ERV-DF-LIN-00012 |
293 mm | 24 / 20.5 / 10 mm | 155 mm | 44 / 17 mm | Not listed; confirm | Not listed; confirm |
| 325 mm Milking Liner for 147 mm Shell ERV-DF-LIN-00016 |
325 mm | 24 / 28.5 / 10 mm | 147 mm | 44 / 27 mm | Rubber | Not listed; confirm |
| 318 mm Milking Liner for 148.8 mm Shell ERV-DF-LIN-00020 |
318 mm | 24 / 26.7 / 10 mm | 148.8 mm | 40 / 24 mm | Not listed; confirm | With or without vent; specify when ordering |
| 148 mm Milking Liner for 108 mm Shell ERV-DF-LIN-00026 |
148 mm | 20 / 24 / 9.5 mm | 108 mm | 41 / 23 mm | Silicone | Not listed; confirm |
Separate the liner from the shell in your request
Identify both parts, even when you only intend to purchase the liner. Supply the current part codes where available and photographs showing the complete components. The words ‘matched shell’ in the product record describe the catalogue pairing. They do not establish that every shell of that length, or every assembly from another brand, has the same fit.
Compare the two 293 mm entries carefully
ERV-DF-LIN-00011 lists a 140 mm matched shell and liner drawing diameters of 24 / 22.4 / 8 mm. ERV-DF-LIN-00012 lists a 155 mm matched shell and 24 / 20.5 / 10 mm liner drawing diameters. Keep the product codes attached to the complete dimension sets. Selecting either entry from length alone would discard the differences already present in the records.
Use drawing dimensions without inventing labels
The reviewed table calls these values ‘drawing diameters’. It does not, by itself, identify every measurement position. Until an annotated drawing is checked, do not rename a value as a mouth, tail or connection diameter. Ask for the drawing and mark the corresponding points on your existing component. This keeps the comparison useful without pretending the dimension sequence is a complete installation specification.
Clarify material and packing by product
ERV-DF-LIN-00016 lists rubber and a pack quantity of four liners. Those statements apply to that record; they should not be copied into the two 293 mm rows without supporting information. Confirm whether the quotation is for liners alone, shells or an assembly. A matched-shell reference is not evidence that a shell is included in the quoted package.
Request a fit review, not a universal replacement promise
Send the proposed SKU, current liner and shell references, a measurement photo and your required quantity. Ask for confirmation of the exact combination before ordering. Service life, milking performance and compatibility with a named brand are not established by the dimensions reproduced here.
Compare the 318 mm and 148 mm options
ERV-DF-LIN-00020 lists a 318 mm liner, a 148.8 mm matched-shell reference, a four-liner pack and a with-vent or without-vent option. Specify the required vent configuration. ERV-DF-LIN-00026 lists a 148 mm liner, a 108 mm matched-shell reference and silicone. Neither record establishes a universal replacement or a cleaning-temperature rating.
Common purchasing mistakes
- Treating the two 293 mm entries as the same product.
- Turning an unlabelled drawing sequence into a named connection specification.
- Assuming a shell is included because the record lists a matched shell.
- Applying the four-liner pack or rubber description to every SKU.
Replacement enquiry checklist
- Candidate liner SKU and the existing part reference
- Overall liner length and source drawing with measurement positions
- Matched shell reference, shell length and recorded diameters
- Material and packing confirmation for the selected SKU
- Quantity, destination country and whether liners, shells or assemblies are required
Frequently asked purchasing questions
Are the two 293 mm liners interchangeable?
This guide does not establish interchangeability. Their listed shell lengths and drawing dimensions differ; submit the exact existing components for review.
Can I order a liner using only shell length?
Shell length is one field. Include the liner code, full documented dimension sets and measurement references rather than relying on a single length.
Which entries list a four-liner pack?
ERV-DF-LIN-00016 and ERV-DF-LIN-00020 list four liners. Confirm the packing and quotation unit for each selected product; do not apply that quantity to every row.
Which diameter belongs to each connection?
The table preserves the product-record drawing-diameter labels. Request an annotated drawing before assigning individual values to connection or other measurement positions.
How often should a liner be replaced?
This comparison does not establish a replacement interval. Request the instructions for the supplied liner and follow the applicable equipment maintenance requirements rather than inferring an interval from its material or length.
Request a liner quotation
Send the liner SKU, current liner and shell references, measurement photos, required quantity and destination country for a product-specific quotation.
Specify whether you need liners only, shells or complete assemblies, and include material, vent and packaging requirements. Mark missing measurements as unknown.
Request a dairy equipment quotation — enter the selected SKU or product name in the product field, dimensions in specifications, and quantity and destination in the relevant fields. This is a general enquiry; no product is selected automatically.