B68G-NNK-MR3-RLN | Norgren | Olympian Plus Filter/Regulator

The Norgren B68G-NNK-MR3-RLN is a high-capacity filter/regulator (piggyback) unit from the Olympian Plus series. This series is known for its unique plug-in design, allowing for rapid installation and maintenance without disturbing the pipework, provided a compatible yoke is used.

Technical Specifications

Functional Components

Installation Guidelines

• Yoke Requirement: This specific model (NN) is supplied without a yoke. To install it into a pneumatic line, you must have an Olympian Plus B68 series yoke of the appropriate port size (e.g., 3/4" or 1" NPT/ISO G).

• Flow Direction: Ensure the unit is installed with the air flowing in the direction of the arrow cast into the body.

• Vertical Orientation: The unit must be mounted vertically with the bowl at the bottom to ensure the filter element and manual drain function correctly.

• Relieving Feature: Since this is a "Relieving" model, the outlet pressure can be reduced even when the system is dead-ended. You will hear a brief hiss of air from the adjustment knob when lowering the pressure; this is normal operation.

• Bowl Clearance: Leave sufficient space (approx. 150mm) below the bowl to allow for manual draining and element replacement.

Frequently Asked Questions (FAQs)

Can I replace the manual drain with an automatic one?

Yes. Norgren offers auto-drain conversion kits for the B68 series. This is recommended for systems where high moisture accumulation is expected and manual maintenance is difficult.

What is the purpose of the "Relieving" diaphragm?

It allows the regulator to vent downstream pressure when you turn the knob to a lower setting. This is a safety and convenience feature that prevents high pressure from being "trapped" in the downstream line.

What happens if I use this without a gauge?

The "N" code indicates no gauge is included. While the unit will function perfectly, it is highly recommended to install a gauge into one of the 1/8" or 1/4" ports on the body to ensure accurate pressure settings.

Is the 40µm element sufficient for sensitive tools?

40µm is standard for general industrial air tools. However, for precision instruments or paint spraying, you may require a secondary 5µm filter or an oil-removal (coalescing) filter downstream.