Plants that are processing dry powder products often run their equipment under slight negative pressure to avoid product leaking out of equipment and into the plant environment.


While dust leakage into the environment is avoided using negative pressure, improperly sealed flexible connections can risk contamination from air ingress.


A leaky flexible connector can also impact productivity if used in conjunction with vacuum pneumatic conveying as they allow air to be drawn in from outside the convey line reducing the efficiency of the product flow.


The snap-in system of the BFM® fitting keeps the connector ends locked in place making it ideal to use in negative pressure applications.

Ask the Tech Expert – Rings vs Flexi

Choosing the right connector is crucial to its longevity and efficacy, specifically in vacuum situations. One of our most frequently asked questions is when to use a Seeflex with rings versus a Flexi.


Although both products are visually similar, they excel at different applications and operating conditions. Watch our video to find out which BFM® connector is best suited for your application!

Flexibility to meet your needs

Product Suggestions

If you’re looking for a BFM® fitting for your vacuum process, check out these products that we suggest considering as you start your search.
Non-Breathable Connectors

Seeflex 040E Connector

Strong, versatile, flexible; superior wear resistance for multiple applications; ATEX Compliant.

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BFM® connectors can be fitted with stainless steel or plastic support rings to help keep the connector walls open.

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Tool Release

Our Tool Release (TR) option provides the perfect solution for areas where you want to significantly reduce the risk of staff putting their hands near dangerous moving parts.

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Ready to discuss your unique BFM® fitting application? Contact us for a solution.

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