IMI Norgren R68G-NNT-RSN Pressure Regulator - Relieving
Part Number: R68G-NNT-RSN
Quick Summary
IMI Norgren R68G-NNT-RSN pressure regulator is designed to deliver stable compressed air pressure for automation and manufacturing lines. In busy environments, fluctuating outlet pressure can lead to tool chatter, inconsistent cycles, and increased waste. While many regulators exist, this Olympian Plus model emphasizes a diaphragm and balanced valve design and a non-rising T-bar knob with snap-action lock to maintain set pressure under vibration. Certifications and compliance vary by market; verify model-specific documentation for CE marking and any SIL or IP-related requirements. This regulator also emphasizes modular compatibility and serviceability, supporting efficient installation in existing or new pneumatic networks and helping reduce lifecycle costs through reliable, long-term regulation.
Product Information
Extended Description
R68G-NNT-RSN 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
0.7 ... 17 bar, 10 ... 247 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
4355-50
Tamper Resistant Cover
Y68A-6GN-N2N
Yoke assemblies
18-001-979
Wall Bracket
R68G-KITR
Service kit R68G
Feature: Diaphragm and balanced valve design ensures stable regulation. Business Impact: Reduces outlet pressure ripple, improving tool performance and cycle consistency; Application: General automation lines requiring dependable flow control in compressed air systems. Feature: Non-rising adjusting knob with snap-action lock. Business Impact: Maintains set pressure despite vibration or small mechanical shocks, reducing re-adjustments; Application: High-vibration manufacturing environments or equipment mounted on conveyors. Feature: Relieving regulator function. Business Impact: Safe pressure management with controlled release, enhancing system safety and controlled exhaust; Application: Pneumatic circuits where controlled depressurization is needed. Feature: Wide outlet range 0.7–17 bar and inlet up to 20 bar. Business Impact: Flexibility to support multiple tools and operating conditions without swapping regulators; Application: Mixed tooling setups or capex-light retrofits in existing lines. Feature: Flow capacity 170 dm3/s (360 scfm). Business Impact: Supports parallel actuators and higher-demand cycles, reducing pressure drop; Application: High-demand lines and multi-actuator manifolds. Feature: Aluminium body and bonnet with nitrile elastomer seals. Business Impact: Corrosion resistance, durability, and reliable sealing across temperatures; Application: Harsh plant environments and high-duty cycles. Feature: Optional yoke compatibility and serviceability. Business Impact: Modular mounting with Y68A accessories and easy maintenance via R68G-KITR; Application: Retrofit projects and scheduled maintenance programs. Feature: Operating range -20 to 80 °C and compact footprint. Business Impact: Consistent performance in varied environments while preserving space on panels or machines; Application: Industrial plants with tight install space and temperature variation. Feature: Availability of service kits and spare parts. Business Impact: Lower maintenance costs and shorter downtime; Application: Plants prioritizing predictive maintenance and asset longevity.
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FAQs
For a secure retrofit, mount the regulator on a stable panel or wall using compatible hardware and connect to a standard compressed air supply. Consider the Yoke accessory options (Y68A-6GN-N1N or N2N) if you need to adapt mounting to existing manifolds. Ensure the port alignment matches without yoke configurations and verify the 20 bar maximum inlet rating to prevent over-pressure conditions during installation.
The R68G-NNT-RSN operates from 0.7 to 17 bar at the outlet, with a maximum inlet pressure of 20 bar, suitable for a broad range of tools. Operating temperatures span -20 to 80 °C, enabling stable regulation in diverse environments. This wide range helps maintain consistent tool pressure, reducing cycle time variability and improving overall production throughput.
Yes, this model is a relieving regulator, designed to safely vent excess pressure when needed. This feature helps protect downstream actuators and maintains safe shut-off conditions for critical lines. When selecting for high-demand applications, verify the exact relief characteristics in the datasheet to ensure compatibility with your safety and regulatory requirements.
A dedicated service kit, R68G-KITR, is available to support periodic maintenance and parts replacement. The design uses durable materials such as aluminium for the body and nitrile elastomers for seals, aiding long service life. Regular maintenance reduces the risk of drift, maintains regulation accuracy, and extends the regulator’s useful life in demanding plants.
The regulator supports modular mounting and common Norgren accessories. Yoke assemblies (Y68A-6GN-N1N, Y68A-6GN-N2N) and a Wall Bracket (18-001-979) are available to simplify installation and retrofits. This flexibility minimizes installation time, enables easy repositioning, and ensures compatibility with broader Olympian Plus product families and existing pneumatic systems.