Understanding the Two Specifications of Oil Separator 6.4334.0: Shallow Port vs. Deep Port

When replacing an air compressor oil separator, many users focus on the outer dimensions and thread size. However, even separators with identical external 

dimensions may have important structural differences that affect installation and performance.

One typical example is the Oil Separator 6.4334.0, which is available in two specifications: a shallow-port version and a deep-port version.Because the external 

dimensions are identical, the two separators may appear interchangeable at first glance.

Key Difference: Port Depth

The only difference between these two specifications is the port depth:

Specification 1 – Shallow Port

Port Depth: 17 mm

Specification 2 – Deep Port

Port Depth: 28 mm

Although the difference may seem minor, the port depth plays an important role in ensuring proper fitment and sealing inside the compressor system.

Why Port Depth Matters

Selecting the incorrect port depth may lead to:

Installation difficulties

Improper sealing

Reduced separation efficiency

Increased oil carryover

Potential maintenance issues

Therefore, it is important to verify the separator specification before placing an order.

How to Identify the Correct Separator

If you are unsure which version your compressor requires, we recommend providing one of the following:

Compressor model

Separator part number

Photos of the existing separator

Machine nameplate information

Our technical team can help identify the correct replacement quickly and accurately.

Qingdao Futai is your one-stop supplier of all air compressor parts to keep your air compressor at its best performance. If you are interested in our products and 

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