Norgren R74G-3GK-RFN Excelon pressure regulator - Relieving
Part Number: R74G-3GK-RFN
Quick Summary
Norgren R74G-3GK-RFN Excelon pressure regulator is a general purpose regulator for compressed air systems that provides precise downstream pressure control. Too often, fluctuating downstream pressure and dead-ended lines slow cycles and shorten tool life. The Excelon family emphasizes balanced valve design, inline or modular installation, and relieving relief options with a tamper-resistant knob. CE-compliant manufacturing and standard pressure range protection help ensure regulatory adherence and consistent performance across plants. This page highlights efficiency gains, installation compatibility with G3/8 lines, and the option to add gauges or relievers as needed. Designed for automation environments, it supports inline installation and modular assemblies to simplify upgrades and service.
Product Information
Extended Description
R74G-3GK-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
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
105 dm3/sec, 222 scfm
Materials - Adjusting Knob
Acetal resin
Materials - Body
Diecast aluminium
Materials - Bonnet
Diecast aluminium
Materials - Elastomers
Nitrile rubber
Dimensions - Height
74 mm
Dimensions - Length
170 mm
Dimensions - Width
80 mm
Weight
0.8 kg
Country of Origin
Mexico
Range
R74G
Series
Excelon
Brand
IMI Norgren
4316-52
Porting Block - Excelon 73/74 Series, Connection G1/4"
T74T-3GA-P1N
Excelon 3/2 modular system shut-off valve, G3/8
4315-10
Quikmount pipe adapter
4324-50
'Universal' Bracket
4314-51
Quikclamp
4368-51
Neck Mounting Bracket
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-3GK-RFN
Excelon Plus general purpose pressure regulator, G3/8, 0.3-4 bar, without gauge
R84G-3GK-RFG
Excelon Plus general purpose pressure regulator, G3/8, 0.3-4 bar, integrated gauge
Feature: Medium is compressed air. Impact: Clean, dry air supports stable regulation and reduces drift and maintenance costs in downstream devices. Application: Ideal for automation cells and pneumatic tooling where reliability matters. Feature: Operating Temperature range from -34 to 80 °C (-29 to 176 °F). Impact: Broad environmental tolerance minimizes performance variation between factory floors and harsh environments. Application: Suitable for indoor plants and outdoor enclosures in varied climates. Feature: Port Size G3/8 with Gauge Port Rc1/8. Impact: Standardized piping accelerates installation and enables easy monitoring with gauges. Application: Great for retrofit projects and modular systems in existing Norgren Excelon workflows. Feature: Outlet Pressure Adjustment 0.3–4 bar with Maximum Inlet Pressure up to 20 bar; Relieving design. Impact: Precise downstream control while providing relief to protect downstream components in dead-ended or surge conditions. Application: Protects valves, actuators, and cylinders in automated lines. Feature: Materials – Body and Bonnet are Diecast aluminium; Adjusting Knob in Acetal resin; Elastomers in Nitrile rubber. Impact: Durable, chemically resistant construction with cleanability suitable for industrial environments. Application: Long service life in manufacturing, packaging, and process zones. Feature: Dimensions and Weight – Height 74 mm, Length 170 mm, Width 80 mm; Weight 0.8 kg. Impact: Compact footprint supports tight panel spaces and modular mounting. Application: Fits standard DIN rails and cabinet layouts for streamlined integration. Feature: Push to Lock Adjusting Knob with Tamper-Resistant Accessory. Impact: Reduces accidental setting changes in high-vibration environments. Application: Ideal for lines with operator access concerns or safety-critical processes.
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FAQs
The R74G-3GK-RFN Excelon supports both inline and modular installation configurations, allowing you to drop it into existing hard-piped networks or into a modular framework of Excelon components. Use the G3/8 port sizing for standard piping, and consider the Rc1/8 gauge port if you plan to monitor downstream pressure with a gauge. For retrofit projects, verify space in the panel and confirm compatibility with T74 and 4316-52 accessory blocks to simplify mounting and plumbing.
This regulator delivers an outlet pressure range of 0.3 to 4 bar (4 to 58 psi) with a maximum inlet pressure of 20 bar, designed to maintain stable downstream pressure across flow rates up to 105 dm3/sec (222 scfm). The relieving option helps protect downstream lines during dead-end conditions, and the balanced valve design minimizes hysteresis and response time variability in dynamic automation cycles.
Yes. Built for industrial environments, the Excelon regulator features diecast aluminium bodies, nitrile elastomers, and a robust acetal knob that resist oil and abrasion. The unit’s 74 mm height and 170 mm length fit compact panels, while its inline or modular compatibility enables scalable deployment across conveyors, pick-and-place stations, and robot grippers with consistent, controllable pressure.
The R74G-3GK-RFN is part of the Excelon family, which is designed to meet common European and global regulatory expectations for pneumatic components. You should consult the datasheet and installation guide for exact CE compliance statements and any region-specific approvals, especially if your system interfaces with safety-rated devices or SIL-capable controls in critical processes.
Regular inspection of the gauge port and adjustment knob, plus periodic replacement of elastomer seals and O-rings, preserves accuracy and reduces drift over time. The unit’s durable diecast construction and tamper-resistant knob minimize unplanned adjustments and downtime, contributing to lower maintenance costs, fewer spare-part requirements, and faster system uptime in automated lines.