Norgren R74G-4GK-RFN General Purpose Regulator - Relieving

Part Number: R74G-4GK-RFN
Manufacturer
Norgren
Part number
R74G-4GK-RFN

Quick Summary

Norgren R74G-4GK-RFN is a general purpose regulator designed to deliver stable, adjustable downstream pressure for pneumatic automation lines. When pressure drifts or a system dead-end occurs, downtime and inconsistent actuation erode efficiency. CE marking and ISO 9001 quality practices underpin its manufacture, with the Excelon portfolio addressing robustness in harsh industrial environments. This regulator supports inline or modular installation and offers a tamper-resistant, push-to-lock adjusting knob as a security feature, delivering reliable performance in demanding production environments. By combining engineered precision with practical installation options, it helps engineers optimize control loops and reduce lifecycle costs in compressed-air systems.

Product Information

Extended Description

R74G-4GK-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
G1/2
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
4314-51
Quikclamp
4355-51
Tamper Resistant Cover and Wire
4314-52
Quikclamp with wall mounting bracket
4368-51
Neck Mounting Bracket
4324-50
'Universal' Bracket
R74G-KITR
Service kit R74G
R84G-4GK-RFN
Excelon Plus general purpose pressure regulator, G1/2, 0.3-4 bar, without gauge
R84G-4GK-RFG
Excelon Plus general purpose pressure regulator, G1/2, 0.3-4 bar, integrated gauge
Feature → Balanced valve design provides stable pressure control, reducing downstream fluctuation and improving actuator repeatability in automated lines. Business Impact → Higher cycle accuracy and reduced air waste translate to lower energy consumption and operating costs. Application → Use on G1/2 ports for medium-volume pneumatic circuits where precise pressure regulation is critical. Feature → In-line or modular installation flexibility supports compact layouts and retrofit projects. Business Impact → Faster site deployment and easier maintenance, minimizing downtime during system upgrades. Application → Suitable for OEM machines and control panels desiring scalable air regulation. Feature → Relieving relief capability with a 0.3 to 4 bar adjustable outlet enables safe dead-end relief and system protection. Business Impact → Enhanced safety and compliance for pressure control without external add-ons. Application → Ideal for lines requiring controlled down-stream pressure under transient conditions. Feature → Knob adjustment with push-to-lock and tamper-resistant accessory option improves process integrity. Business Impact → Lower risk of accidental setting changes, preserving tuned performance over time. Application → Environments where operators require restricted access to regulator settings. Feature → Durable construction with die-cast aluminium body and bonnet and nitrile elastomer seals supports long service life. Business Impact → Reduced maintenance frequency and extended intervals between rebuilds. Application → Harsh workshop and factory floor conditions where air quality and temperature vary. Feature → Moderate footprint with 74 mm height, 170 mm length, 80 mm width and 0.8 kg weight for easy panel and machine integration. Business Impact → Minimal impact on enclosure size and mounting arrangements, simplifying installation. Application → Panel-mounted regulators for compact control stations and tool rooms.

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FAQs

Install the regulator using the G1/2 inlet and outlet ports with the Rc1/8 gauge port accessible for system monitoring. Mount in-line or on a modular panel using compatible brackets (e.g., 4368-51 neck mount or 4324-50 universal bracket). Ensure seals are nitrile and tighten connections to a standard pneumatic torque. This setup supports quick-access maintenance and reliable gauge readings on the Rc port.
The R74G-4GK-RFN provides an adjustable outlet pressure from 0.3 to 4 bar (4 to 58 psi) and supports a maximum inlet pressure of 20 bar. Flow capability is listed at 105 dm3/sec (222 scfm), making it suitable for moderate-flow pneumatic applications. The relieving design helps protect downstream circuits during dead-end conditions.
Yes, the Excelon design is intended for reliable, repeatable regulation in automation environments. Its balanced valve and knob-based adjustment provide stable downstream pressure, improving actuator consistency across frequent cycling. For high-cycle lines, ensure the installation leverages inline/modular configurations and is paired with appropriate service kits for predictable long-term performance.
The R74G-4GK-RFN adheres to common industrial standards including CE marking for European markets and ISO 9001 quality management practices in manufacturing. For specific project requirements, consult the distributor or Norgren documentation to confirm current certifications and any region-specific conformance.
R74G-KITR is the dedicated service kit for this family, enabling periodic refresh of seals and moving parts to extend life and maintain accuracy. Regular maintenance reduces unexpected downtime, improves control stability, and lowers total cost of ownership in automated pneumatic systems. Plan preventive maintenance intervals aligned with operating hours and duty cycle.