B68G-NNT-MR1-RSN | Norgren | Olympian Plus Filter/Regulator

The Norgren B68G-NNT-MR1-RSN is a high-pressure, high-precision filter/regulator from the Olympian Plus series. This specific configuration is designed for heavy-duty industrial applications requiring fine filtration (5µm) and high-end pressure control (up to 17 bar), featuring a T-bar adjustment for ease of use under high torque.

Technical Specifications

Functional Features

• Standard Bowl (G): Equipped with a liquid level indicator for easy visual monitoring of condensate.

• T-bar Adjustment (T): Provides extra leverage, making it easier to adjust outlet pressure, especially at the higher end of the 17-bar range.

• Fine Filtration (1): The 5µm element removes significantly smaller particles than standard 40µm filters, protecting sensitive downstream equipment.

Installation Guidelines

• Yoke Mounting: This unit is a "Basic" model (Code: NN) and requires an Olympian Plus B68 yoke for installation. The yoke remains in the pipework, allowing the filter/regulator to be plugged in or removed in seconds.

• Orientation: Mount the unit vertically with the bowl facing downward. Ensure there is at least 150mm of clearance below the bowl for manual draining and filter element maintenance.

• Pressure Safety: Given the high maximum pressure (17 bar), ensure all downstream piping, hoses, and tools are rated for the intended operating pressure.

• Relieving Function: This is a relieving regulator. When the downstream pressure is adjusted from a high to a low setting, excess air will be exhausted through the regulator body. Do not block the vent hole.

Frequently Asked Questions (FAQs)

Why does this model use a T-bar instead of a standard knob?

The T-bar is used for the "S" pressure range (up to 17 bar). At higher pressures, the internal spring tension is much stronger; the T-bar provides the necessary leverage for the operator to make precise adjustments comfortably.

Is a 5µm filter element restrictive to airflow?

While a 5µm element provides cleaner air, it does create a slightly higher pressure drop than a 40µm element. Ensure your compressor capacity accounts for this if running high-flow applications.

Can I install a gauge on this unit later?

Yes. Although this model is coded "N" (Without Gauge), the body features gauge ports (usually 1/8" or 1/4" NPT/ISO G). You can remove the port plug and install a standard back-mount pressure gauge at any time.

What maintenance is required for the manual drain?

The drain should be opened periodically to expel collected water and oil. If the liquid level reaches the "Max" line on the indicator, it can cause moisture carryover into the air line.