When a flexible connection leaks, the impact is immediate — dust in the air, product loss, longer cleanup, and less confidence in the process.

These three BFM® fittings remain PSI’s most commonly used because they solve the most frequent challenges in powder-handling systems: connections, inspection access, and controlled venting.

Our Most Popular Dust-Control Solutions

1. Seeflex 040E — Flexible Fittings That Go the Distance

Seeflex 040E remains PSI’s most widely used BFM® fitting because it performs well across a broad range of everyday powder-processing applications.

What It Is

Seeflex 040E is PSI’s standard BFM® fitting material. It combines a clear sleeve for visibility with flexibility and strength that support consistent performance in day-to-day operations.

Why Facilities Choose It

• Visibility During Operation: The clear sleeve makes it easier to monitor product flow and spot buildup
• Flexibility With Strength: Designed to handle movement and vibration while maintaining a 100% seal
• A Practical Standard: A reliable default for many common applications across food & bakery, dairy, nutrition, pharmaceutical, chemical, mineral, ingredients, and pet food facilities

Standardizing on a common BFM® fitting material can simplify maintenance. Because Seeflex 040E is widely used, PSI typically has more sizes available for quick replacement shipping. If Seeflex 040E is your default BFM® fitting, document your most common sizes so reorders stay fast and predictable.

2. Blanking Caps You Can Look Through

BFM® blanking caps are increasingly used where teams want inspection access without giving up containment.

What It Is

BFM® blanking caps are made from the same polyurethane material used in Seeflex 040E BFM® fittings. They snap into standard BFM® spigots to create a transparent, secure pipe end with a 100% seal.

Why Facilities Choose It

• See Without Removing: Transparency allows inspection without breaking the seal
• Quick Access When Needed: Easy removal and snap-in for inspection or changeovers for CIP
• Consistent Containment: Helps keep product in and dust out of the surrounding environment

Blanking caps are commonly used as sight-glass or inspection ports, especially where inspections are frequent or hygiene expectations are high.

If you currently rely on a traditional cover, a BFM® blanking cap is a simple upgrade that adds visibility while maintaining a 100% dust-free connection.

3. FM1 Breather — Venting Without Dust Escape

Sealing a system is often the goal, but some processes still require controlled airflow. That’s where the FM1 Breather is used.

What It Is

The FM1 Breather is a BFM® fitting designed for breathing applications such as venting hoppers and other contained vessels. It is typically used when a system is fully sealed but still needs pressure equalization.

Why Facilities Choose It

• Supports Airflow Where Needed: Designed specifically for breathing applications
• Maintains Dust Containment: Allows airflow while helping contain product dust
• Handles Higher Temperatures: Suitable for applications beyond standard material limits

Most BFM® fittings are intentionally non-breathable. When airflow is required, the FM1 Breather is the purpose-built option that supports venting without compromising dust control.

Why Select PSI as Your BFM® fittings Distributor?

An authorized distributor plays a practical role in how well a BFM® fitting performs over time.

When you work with an authorized partner, you get:

• Genuine BFM® fittings manufactured to the correct specifications

• Manufacturer-backed support and warranty, if issues arise

• Application guidance to help match the right BFM® fitting to your process

The result is fewer installation issues, fewer replacements, and more confidence that the fitting you select will perform as intended in your system.

Why Plants Partner With PSI

PSI’s team of BFM® fitting application experts has completed more than 25,000 installations since 2008, supporting retrofit, new, and custom applications. PSI also provides installation guidance, product recommendations, and responsive technical support to help BFM® fittings perform as intended.

Quick Summary: Which One Should You Start With?

• Choose Seeflex 040E for a reliable, general-purpose BFM® fitting
• Use BFM® blanking caps when you need visibility and a sealed pipe end
• Select the FM1 Breather when your sealed system requires controlled venting

Ready To Match the Right BFM® Fitting to Your Application?

If you’d like help deciding which BFM® fitting makes sense for your system, reach out to the PSI team. We can walk through your setup, answer questions, and help you confirm material and sizing — no guesswork required.