Norgren R68G-NNT-RLN Pressure Regulator - Relieving
Part Number: R68G-NNT-RLN
Quick Summary
Pressure regulator R68G-NNT-RLN provides precise compressed air control for reliable automation in manufacturing lines. Fluctuating pressure can cause actuator chatter, inconsistent cycle times, and unplanned downtime, which this regulator helps prevent. The design supports CE compliance and reliable performance in safety-focused applications, with compatibility for SIL-rated controls and rugged environments. Its Olympian Plus lineage delivers proven regulation characteristics in industrial settings, while the non-rising adjusting knob with snap-action lock reduces drift during servicing. For OEMs and maintenance teams, this unit enables predictable actuation, easier field calibration, and streamlined spares management by aligning with the R68G family.
Product Information
Extended Description
R68G-NNT-RLN 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
0.4 ... 8 bar, 6 ... 116 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
Y68A-6GN-N2N
Yoke assemblies
4355-51
Tamper Resistant Cover and Wire
18-001-979
Wall Bracket
R68G-KITR
Service kit R68G
Feature: Medium is compressed air; Business Impact: ensures clean, dry air delivery, minimizing elastomer wear and extending service intervals. Application: general pneumatic systems in manufacturing lines. Feature: Outlet pressure range 0.4 to 8 bar; Business Impact: enables precise actuator force and fast response, improving cycle consistency. Application: packaging and automation lines requiring tight pressure windows. Feature: Maximum inlet pressure 20 bar and relieving action; Business Impact: safe venting and robust performance during pressure surges, reducing leak risk. Application: reliable start-up and system safety. Feature: Non-rising T-bar adjustment with snap-action lock; Business Impact: setpoints stay stable during servicing, lowering drift. Application: field calibration without rework. Feature: Materials including aluminum body and bonnet, zinc-plated steel knob, nitrile elastomers; Business Impact: durable, temperature-tolerant construction for harsh environments. Application: -20 to 80 C operation. Feature: Compact footprint with defined dimensions and weight; Business Impact: easy integration into existing panels and reduced installation time. Application: wall mounting with optional Yoke assemblies. Feature: Compatibility with service kits and accessories R68G-KITR and Y68A yoke options; Business Impact: streamlined maintenance and flexible mounting. Application: OEM and service environments.
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FAQs
Install the R68G-NNT-RLN as a standard pressure regulator in the main supply line, ensuring the medium is clean, dry compressed air. Since this model has no gauge and no yoke, mount it on a flat panel or bracket and use compatible service kits or mounting accessories. Connect inlet to supply, outlet to the control circuit, and verify the setpoint with an external gauge if required for commissioning. Use the R68G-KITR service kit for maintenance readiness.
Key specs include a 0.4 to 8 bar outlet pressure adjustment range, a 20 bar maximum inlet pressure, relieving outlet venting, and a flow capacity of 170 dm3 per second. The regulator operates over -20 to 80 C, uses a zinc-plated steel adjusting knob, aluminum body and bonnet, and nitrile elastomers. It is designed for compressed air and supports rapid response in automation tasks.
The R68G-NNT-RLN is designed for reliability in industrial automation and is compatible with safety-focused installations. While it supports integration with SIL-rated controls in system designs, verify your specific safety integrity level requirements with your overall control architecture and ensure the regulator sits within a compliant safety loop and installation scheme.
Regular maintenance uses the dedicated service kit R68G-KITR to refresh elastomer seals and moving parts, monitor for wear, and reseat the setpoint if drift is observed. Inspect for leaks, replace elastomer components as needed, and confirm the regulator still meets the desired outlet pressure. This approach minimizes downtime and maintains consistent actuation in production lines.
Yoke assemblies Y68A-6GN-N1N and Y68A-6GN-N2N are available to adapt the regulator to different mounting configurations, along with a wall bracket 18-001-979 for panel or wall installation. For ongoing reliability, consider service kits and maintenance parts such as R68G-KITR, ensuring easy replacement and extended service life in busy facilities.