Norgren R68G-NNT-RFN Pressure Regulator - 0.3-4 bar
Part Number: R68G-NNT-RFN
Quick Summary
Norgren R68G-NNT-RFN pressure regulator provides precise air pressure control for general pneumatic systems in automation and manufacturing. Inconsistent supply pressure can derail cycles, increase tool wear, and raise maintenance costs. For safety and compliance, critical certifications commonly seen with regulators in this class include CE conformity, IP ratings for rugged environments, and SIL-capable interfaces. Choosing this model supports uptime and predictable performance across production lines, delivering reliable regulation while simplifying procurement with a compact, field-proven solution. The Olympian Plus family behind this regulator offers a robust diaphragm and balanced valve design for dependable operation in harsh environments, along with serviceability that helps reduce total cost of ownership.
Product Information
Extended Description
R68G-NNT-RFN Norgren: Diaphragm and balanced valve design ensure good regulation characteristics | Non-rising adjusting knob has snap-action lock
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Port Size
Without Yoke
Adjustment
T-bar
Maximum Inlet Pressure
20 bar
Outlet Pressure Adjustment
0.3 ... 4 bar, 4 ... 58 psi
Relieving / Non Relieving
Relieving
Flow
170 dm3/sec, 360 scfm
Materials - Adjusting Knob
Zinc plated steel
Materials - Body
Aluminium
Materials - Bonnet
Aluminium
Materials - Elastomers
Nitrile rubber
Dimensions - Height
234 mm
Dimensions - Length
111 mm
Dimensions - Width
91 mm
Weight
1.16 kg
Country of Origin
Czechia
Range
R68G
Series
Olympian Plus
Brand
IMI Norgren
Y68A-6GN-N1N
Yoke assemblies
4355-51
Tamper Resistant Cover and Wire
Y68A-6GN-N2N
Yoke assemblies
18-001-979
Wall Bracket
R68G-KITR
Service kit R68G
Diaphragm and balanced valve design ensure stable regulation under fluctuating load and supply, reducing cycle time variation and tool wear in automated lines. This translates to improved throughput and lower maintenance costs in busy production environments. The non-rising adjusting knob with snap-action lock prevents inadvertent setpoint changes, safeguarding process stability and minimizing operator-induced drift during high-traffic shifts. A relieving/regulating configuration provides predictable pressure relief behavior, enhancing safety margins when downstream demand suddenly drops. With a maximum inlet pressure of 20 bar and an adjustable outlet range of 0.3 to 4 bar, this regulator fits a wide spectrum of shop-air systems while maintaining precise control. The aluminium body and bonnet, zinc-plated steel knob, and nitrile rubber elastomers deliver durable performance in standard factory conditions and resist typical oil- and abrasion-related wear. Compatibility with Yoke assemblies (Y68A-6GN-N1N/N2N) and wall mounting (18-001-979) simplifies installation on existing frames, saving integration time and reducing downtime. Flow capacity of 170 dm3/sec (360 scfm) supports modern tooling without sacrificing response speed, while the compact footprint and defined dimensions (Height 234 mm, Length 111 mm, Width 91 mm) ease enclosure planning.
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FAQs
The R68G-NNT-RFN uses a port design without a yoke, enabling compact panel mounting. For secure installation, you can pair it with Yoke assemblies Y68A-6GN-N1N or Y68A-6GN-N2N, or use the 18-001-979 Wall Bracket for surface mounting. Ensure proper alignment and clearance around the adjustment knob to avoid interference during service.
The regulator tolerates a maximum inlet pressure of 20 bar and provides an adjustable outlet pressure from 0.3 to 4 bar (0.3–58 psi). It is a relieving type, which helps vent excess pressure downstream when demand drops, maintaining stable downstream pressure and protecting connected tools from overpressure.
Yes, the unit is designed for general automation environments with an operating temperature range of −20 to 80 °C and an aluminium body for durability. The elastomer components use nitrile rubber, offering chemical resistance suitable for typical factory air with minor contaminants. For harsher environments or washdown areas, consider enclosure protection or a dedicated IP-rated housing as needed.
Install on a clean, vibration-free surface and verify panel alignment to prevent misadjustment. Use the snap-action lock on the T-bar adjustment to prevent unintentional changes. Pair with the service kit R68G-KITR for routine calibration and diaphragm inspection, and select appropriate mounting accessories to ensure quick replacement and minimal line downtime.
The balanced diaphragm design delivers stable output with reduced drift, lowering cycle-time variability and potential tool wear. Quick-access adjustment and compatibility with service kits support predictable maintenance. Over time, this can translate into improved uptime, reduced scrap, and lower total cost of ownership for automated production lines.