Norgren V74G-3GK-NMN Valve - Excelon Pressure Relief 0.3-10 bar
Part Number: V74G-3GK-NMN
Quick Summary
Excelon pressure relief valve V74G-3GK-NMN is a valve that protects compressed air systems from over-pressurisation, enabling reliable operation in manufacturing environments. Without proper relief, unexpected pressure spikes can cause equipment damage and unplanned downtime, complicating maintenance and throughput. Key regulatory alignment is provided by PED compliance under 97/23/EC, with Category 0 (S.E.P.) and Category 1 certification, supporting safe EU integration. The design supports in-line or modular Excelon configurations, delivering flexible protection across lines and machines. Durable aluminium bodies with acetal adjusting knobs and nitrile elastomer seals ensure long life, while tamper-resistant features and compatibility with standard mountings deliver predictable performance and lower total cost of ownership for industrial pneumatic systems.
Product Information
Extended Description
V74G-3GK-NMN Norgren: Excelon design allows in-line installation or modular installation with other Excelon products | Push to lock adjusting knob with tamper resistant accessory | Helps protect air operated equipment from over pressurisation | Norgren pressure relief valves comply with category 0(S.E.P.) and category 1 of the Pressure Equipment Directive 97/23/EC.
Medium
Compressed air
Operating Temperature
-34 ... 80 °C, -30 ... 175 °F
Port Size
G3/8
Gauge Port
Rc1/8
Maximum Inlet Pressure
10 bar
Outlet Pressure Adjustment
0.3 ... 10 bar, 4 ... 145 psi
Materials - Adjusting Knob
Acetal resin
Materials - Body
Aluminium
Materials - Bonnet
Aluminium
Materials - Elastomers
Nitrile rubber
Dimensions - Height
170 mm
Dimensions - Length
74 mm
Dimensions - Width
80 mm
Weight
0.82 kg
Country of Origin
Mexico
Range
V74G
Series
Excelon
Brand
IMI Norgren
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Tamper Resistant Cover and Wire
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Neck Mounting Bracket
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Quikclamp
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Quikclamp with wall mounting bracket
4324-50
'Universal' Bracket
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Feature: Excelon design allows in-line installation or modular installation with other Excelon products. Business Impact: Reduces installation time, simplifies upgrades, and enables scalable protection across existing networks. Application: Retrofit projects and new lines in automated plants benefit from quick integration and consistent performance. Feature: Push to lock adjusting knob with tamper resistant accessory. Business Impact: Prevents accidental pressure changes, improving process stability and operator safety. Application: High-usage production floors where adjustments must be controlled. Feature: Protects air-operated equipment from over pressurisation. Business Impact: Extends component life, reduces maintenance costs, and minimizes downtime. Application: Pneumatic actuators and tools in assembly and packaging lines. Feature: Adjustable outlet range from 0.3 to 10 bar; Maximum inlet pressure 10 bar. Business Impact: Enables precise setpoints and safe limit control, improving process consistency and energy efficiency. Application: Critical air circuits requiring accurate relief, from clamping to tooling. Feature: Aluminium body and bonnet with nitrile elastomer seals; Acetal adjusting knob. Business Impact: Combines durability with chemical compatibility and temperature resilience, lowering part replacement. Application: Harsh factory environments and high-cycle applications. Feature: Compatibility with standard accessories and service kits (e.g., V74G-KIT, MB004B silencer). Business Impact: Streamlines maintenance, reduces downtime, and supports easy retrofits. Application: Field servicing and upgrades in existing installations.
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FAQs
The V74G-3GK-NMN is designed for seamless integration with the Excelon product line, supporting both in-line and modular configurations. It uses a G3/8 port and Rc1/8 gauge port to match standard pneumatic manifolds, making it straightforward to retrofit existing systems or expand new installations without reworking upstream piping.
Key specs include a maximum inlet pressure of 10 bar, outlet pressure adjustment from 0.3 to 10 bar (4 to 145 psi), operating temperature range of -34 to 80 °C, and a compact aluminium body with nitrile elastomer seals. The unit weighs 0.82 kg and is designed for compressed air, enabling precise, reliable relief in demanding environments.
Yes. The valve features a tamper-resistant adjuster and robust Excelon construction, supporting frequent maintenance and reducing the risk of accidental setpoint changes. Its modular compatibility, durable materials, and clear pressure range help ensure stable performance in high-cycle pneumatic applications, minimizing unscheduled downtime and helping maintain production targets.
The V74G-3GK-NMN complies with the Pressure Equipment Directive 97/23/EC, including Category 0 (S.E.P.) and Category 1 ratings. This PED alignment provides regulatory assurance for safe operation in EU-regulated environments, supporting integration into compliant machinery and systems.
Maintenance benefits come from a tamper-resistant knob, durable aluminium construction, and readily available service kits and silencers. The predictable relief performance reduces unplanned downtime and wear on downstream equipment, delivering a favorable return on investment through longer equipment life, lower replacement costs, and smoother plant operations.