Norgren R74G-4AK-RFN Excelon Regulator - Relieving
Part Number: R74G-4AK-RFN
Quick Summary
Norgren R74G-4AK-RFN Excelon regulator provides precise downstream pressure control for common automation air systems. Installers often struggle with set-point drift and unauthorized changes; this model’s balanced valve design and push-to-lock knob help prevent drift and tampering. Industry standards such as CE guidelines and general safety practices support reliable operation in demanding environments. In practice, this Excelon regulator reduces downtime and energy waste through fast response and durable construction. Key specs include 0.3–4 bar output, 20 bar inlet, 1/2" PTF ports, and in-line or modular Excelon installations. You gain predictable performance, easier maintenance, and safer system start-ups across automotive, packaging, and process automation environments.
Product Information
Extended Description
R74G-4AK-RFN Norgren: Excelon design allows in-line or modular installation | Balanced valve design for optimum pressure control | Standard relieving models allow reduction of downstream pressure when the system is dead-ended | Push to lock adjusting knob with tamper resistant accessory
Medium
Compressed air
Operating Temperature
-34 ... 80 °C, -29 ... 176 °F
Port Size
1/2" PTF
Gauge Port
1/4" PTF
Adjustment
Knob
Maximum Inlet Pressure
20 bar
Outlet Pressure Adjustment
0.3 ... 4 bar, 4 ... 58 psi
Relieving / Non Relieving
Relieving
Flow
105 dm3/sec, 222 scfm
Materials - Adjusting Knob
Acetal resin
Materials - Body
Diecast aluminium
Materials - Bonnet
Diecast aluminium
Materials - Elastomers
Nitrile rubber
Range
R74G
Series
Excelon
Brand
IMI Norgren
4315-03
Quikmount pipe adapter
4324-50
'Universal' Bracket
4368-51
Neck Mounting Bracket
4314-51
Quikclamp
4314-52
Quikclamp with wall mounting bracket
4355-51
Tamper Resistant Cover and Wire
4348-89
Panel Mounting Nut
R74G-KITR
Service kit R74G
R84G-4AK-RFG
Excelon Plus general purpose pressure regulator, 1/2 PTF, 0.3-4 bar, integrated gauge
R84G-4AK-RFN
Excelon Plus general purpose pressure regulator, 1/2 PTF, 0.3-4 bar, without gauge
Excelon’s in-line and modular installation capability reduces integration time and inventory complexity. This design minimizes piping runs and simplifies retrofits, making it ideal for OEM lines and service-friendly control panels in automated plants. The balanced valve design delivers stable downstream pressure with quick response to load changes, improving actuator performance on conveyors and pick-and-place systems. The relieving option protects downstream circuits when the system is dead-ended, helping maintain safe start-ups and preventing over-pressurization in machining centers and assembly lines. A push-to-lock knob with a tamper-resistant accessory prevents unauthorized adjustments, reducing change-control risk on high-availability lines. Durable die-cast aluminium body and bonnet, paired with nitrile elastomer seals, stand up to shop-floor wear and temperature swings from -34 to 80 °C, supporting long service life in harsh environments. With a 105 dm3/sec (222 scfm) flow and 20 bar max inlet, the R74G-4AK-RFN supports consistent performance across mid-range automation tasks while maintaining compatibility with existing Norgren accessories such as Quikmount adapters and mounting brackets. For installers, the ability to use inline or modular layouts reduces installation time, minimizes inventory skews, and helps maintain tight process control in packaging, robotics, and processing lines. In short, the regulator balances precision, durability, and ease-of-use to deliver measurable efficiency gains and predictable performance in real-world industrial applications.
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FAQs
Mount the regulator in-line with the main air line using the 1/2" PTF inlet. If sensing or monitoring is required, connect a 1/4" PTF gauge port. Ensure downstream components are rated for 0.3–4 bar output and that the system supply does not exceed 20 bar. The modular Excelon design supports both inline and panel-mount configurations to suit OEMs and service corridors.
The R74G-4AK-RFN provides an outlet pressure adjustment from 0.3 to 4 bar (4–58 psi) with a maximum inlet pressure of 20 bar. It delivers a flow of 105 dm3/s (222 scfm), enabling stable operation for common automation actuators and other compressed-air devices across mid-range production lines.
Yes. The regulator’s Excelon design, relieving capability, and tamper-resistant adjustment make it well-suited for packaging, robotics, and assembly lines where reliable pressure control is crucial. Its 1/2 in PTF connections and inline/modular installation simplify integration in existing systems while maintaining consistent downstream pressure across varying loads.
Certification details are not listed in the provided data. For regulated environments, verify CE compliance and other applicable industry standards with Norgren or your procurement team, and confirm IP ratings and SIL considerations as required by your specific application and safety program.
A service kit exists for the R74G series (R74G-KITR), enabling scheduled maintenance and parts replacement to extend service life and maintain set-point accuracy. Regular inspection of the adjusting knob, seals, and return springs, along with periodic calibration and testing of outlet pressure, supports longer mean time between failures and reduces unplanned downtime in production lines.