Norgren R84G-3GK-RFN Pressure Regulator - Relieving
Part Number: R84G-3GK-RFN
Quick Summary
Norgren R84G-3GK-RFN pressure regulator provides precise compressed-air pressure control for automation systems. It addresses common pain points such as drift, tampering, and unreliable gauge readings that drive downtime and maintenance costs. The Excelon Plus range emphasizes CE-ready designs and robust enclosures for industrial environments, with optional IP-rated variants for harsher plants. This model uses a compact, modular layout with a push-to-lock adjusting knob that resists tampering, while offering reliable field adjustment. By combining lightweight construction with durable materials and straightforward installation, it enables faster commissioning, easier service, and improved uptime in both new builds and retrofits for pneumatic circuits.
Product Information
Extended Description
R84G-3GK-RFN Norgren: Reduced weight and size | A flexible modular system | Push to lock adjusting knob with built in tamper resistant feature
Medium
Compressed air
Operating Temperature
-20 ... 65 °C, -4 ... 149 °F
Port Size
G3/8
Gauge Port
Rc1/8
Adjustment
Knob
Maximum Inlet Pressure
20 bar
Outlet Pressure Adjustment
0.3 ... 4 bar, 4 ... 58 psi
Relieving / Non Relieving
Relieving
Flow
125 dm3/sec, 265 scfm
Materials - Adjusting Knob
Acetal
Materials - Body
Diecast aluminium
Materials - Bonnet
POM
Materials - Elastomers
Nitrile rubber
Dimensions - Height
167 mm
Dimensions - Length
74 mm
Dimensions - Width
70 mm
Weight
0.59 kg
Country of Origin
United Kingdom
Range
R84G
Series
Excelon Plus
Brand
IMI Norgren
840055-01KIT
Padlock
840055-02KIT
Padlock Hasp
840048-89KIT
Excelon Plus Panel Nut
840100-02KIT
Excelon Plus Gauge Adaptor Kit - Rc 1/8"
840014-51KIT
Excelon Plus Quikclamp
840014-52KIT
Excelon Plus Quikclamp with Bracket Assembly
840068-51KIT
Excelon Plus Neck Mounting Bracket and Panel Nut
840024-50KIT
Excelon Plus General Mounting Bracket
FRLB84-KIT
Excelon Plus R84/B84 Elastomer Service Kit
Feature → Business Impact → Application: Medium is compressed air for clean, reliable regulation in pneumatic circuits; Port size G3/8 and Gauge Port Rc1/8 provide consistent interfaces with standard piping and instrumentation; Push-to-lock adjusting knob with tamper-resistant feature reduces unauthorized changes, supporting safer maintenance and regulatory compliance; Maximum Inlet Pressure of 20 bar and Outlet Pressure Adjustment of 0.3–4 bar offer a wide operating window for automation lines; Relieving design ensures controlled venting during pressure adjustments, improving system stability; Flow rated at 125 dm3/sec (265 scfm) supports peak demands in peak-load scenarios; Together with materials chosen for durability—Acetal knob, Diecast aluminum body, POM bonnet, and nitrile elastomer seals—this regulator delivers long service life in tough factory environments; Dimensions (Height 167 mm, Length 74 mm, Width 70 mm) and weight (0.59 kg) keep the unit compact for panel mounting and easy retrofit into existing installations; The Excelon Plus platform compatibility extends to a suite of mounting and gauge adaptor options, such as Excelon Plus Quikclamps and Gauge Adaptor Kits, enabling flexible installation in control panels and on machine frames; Overall, the combination of modular design, tamper-resistant features, and robust materials reduces maintenance frequency, improves uptime, and supports predictable pneumatic regulation for high-availability automation.
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FAQs
The R84G-3GK-RFN supports standard Excelon Plus mounting solutions, including Quikclamp assemblies and general mounting brackets. For enhanced panel mounting, refer to accessory kits such as 840014-51KIT (Quikclamp) and 840024-50KIT (General mounting bracket). These options simplify installation, reduce panel fatigue, and enable quick alignment with adjacent components in control panels and machine frames.
The regulator is rated for a maximum inlet pressure of 20 bar. The outlet pressure is adjustable from 0.3 to 4 bar (4 to 58 psi). This range supports a wide variety of pneumatic circuit requirements while maintaining stable regulation and safe venting in relieving configurations.
Yes, the R84G-3GK-RFN is a relieving regulator. This means excess pressure is vented to atmosphere when the setpoint is exceeded, helping protect downstream equipment and improve regulator response during pressure transients. Use with compatible mounting panels and gauge adapters to monitor the relieving port as part of a safe, well-regulated pneumatic system.
A range of Excelon Plus accessories enhances installation and maintenance. Padlock and padlock-hasp kits (840055-01KIT, 840055-02KIT) improve security, while panel nuts (840048-89KIT) and gauge adaptor kits (840100-02KIT) support precise integration with Rc1/8 gauge ports. Quikclamp options (840014-51KIT, 840014-52KIT) simplify mounting, and mounting brackets (840024-50KIT) streamline panel fit.
The Excelon Plus regulator combines a tamper-resistant knob, robust diecast aluminum housing, and nitrile elastomer seals to extend service intervals and reduce unintended adjustments. Its modular design simplifies retrofits and field servicing, lowering downtime and labor costs. In demanding plants, these features translate to more predictable performance, fewer recalibrations, and a lower total cost of ownership over the product lifecycle.