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Filter Elements · ISO 4406 tank breathers

304 Stainless Steel Hydraulic Filler Breather Strainer Basket

A hydraulic tank filler breather cap lifted out with a stainless steel mesh strainer basket hanging below it

Hydraulic Filler Breather Strainer Basket in 304 Stainless Steel (AISI 304 (1.4301)) is used for catching dirt and debris when hydraulic, gearbox and lube tanks are topped up, with a mesh basket that hangs under the filler-breather cap. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.

Alloy Properties

Grade designationAISI 304 (1.4301)
Magnetic responseEssentially non-magnetic (annealed)
Service temperatureapprox. +450 °C continuous
Corrosion characteristicGood general corrosion resistance in atmosphere and fresh water

Specifications of Hydraulic Filler Breather Strainer Basket Available in 304 Stainless Steel

SizeBasket diameter (mm)Depth (mm)MeshMicron rating (u00b5m)
u00d848488030-Mesh547
u00d8606011040-Mesh385
u00d8808015060-Mesh233

Where 304 Stainless Steel Hydraulic Filler Breather Strainer Basket Is Used

  • Hydraulic power units: combined filler-breather assemblies on reservoirs.
  • Industrial gearboxes: oil fill ports on drives and reducers.
  • Mobile machinery: tank fillers on excavators and tractors.
  • Compressors & engines: oil fill necks.

Ordering Hydraulic Filler Breather Strainer Basket in 304 Stainless Steel

  • Basket size: Basket diameter and depth must suit the filler neck and tank depth.
  • Mesh: 30–60 mesh stops debris without slowing filling.
  • Material: Stainless or zinc-plated steel, compatible with the oil.

Mistakes to Avoid with Hydraulic Filler Breather Strainer Basket

  • Removing the basket, which lets rags and debris into the tank.
  • Ignoring the breather element, so dusty air enters every time the level drops.

Technical Drawing

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Specification
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Dimensions & Specifications (ISO 4406 tank breathers)

SizeBasket diameter (mm)Depth (mm)MeshMicron rating (u00b5m)
u00d848488030-Mesh547
u00d8606011040-Mesh385
u00d8808015060-Mesh233

Frequently Asked Questions

What mesh is used in filler baskets?

Usually 30–60 mesh.

What does the breather element do?

It filters air drawn into the tank as the oil level falls.

How do I request a quotation?

Use the technical drawing on this page to pick the exact specification, then submit it with the quote form. We respond within one business day.