Norgren M/21/41 Inline Valves - Manual/Mechanical 3/2
Part Number: M/21/41
Quick Summary
Inline Valves by Norgren are compact, manually operated valves for precise pneumatic control in automation assemblies. Users often contend with tight spaces, high actuation effort, and exhaust management challenges in modern lines. This M/21/41 family supports common certifications and safety goals in compatible variants, with CE compliance and IP-rated protections where configured, and SIL integration possible in safety-critical systems. With a light, compact body and very low pilot pressure, it reduces air consumption while delivering reliable actuation for Martonair-based installations. Quick, robust installations are further supported by Pneufit C push-in fittings and compatible tubing across machine builders and end users.
Product Information
Extended Description
M/21/41 Norgren: Light, compact body | Very low pilot pressure | Air bleed principle | Exhaust port protected by filter disc | Low operating force – highly sensitive
Medium
Compressed air
Operating Temperature
5 ... 80 °C, 41 ... 176 °F
Operating Pressure
4 ... 10 bar, 58 ... 145 psi
Valve operation
3/2
Materials - Body
Zinc alloy
Materials - Piston
Steel
Materials - Seals
Nitrile rubber
Range
M/21
Series
Martonair
Brand
IMI Norgren
C02250618
Pneufit C Push-in fitting, Adaptor, Straight, External/Internal hex, 6mm, G1/8
C02470618
Pneufit C Push-in fitting, Adaptor, 90° Swivel elbow, 6mm, G1/8
PA2-0006100
Polyamide tube, Natural, 100m, 6mm/4mm
PA2-0006025C
Polyamide tube, Natural, 25m, 6mm/4mm
M/3314
Tube cutter
Feature: Light, compact zinc alloy body yields space savings and easier integration in tight panels. Business Impact: Frees up enclosure space, reduces weight in the control cabinet, and lowers mounting complexity for OEMs. Application: Ideal for compact automation lines and valve banks where footprint matters. Feature: Very low pilot pressure and air bleed principle enable sensitive actuation with minimal energy use. Business Impact: Cuts compressed-air consumption and wear, improving operating costs and system efficiency. Application: Beneficial in high-cycle applications and where pilot circuits must be gentle on delicate actuators. Feature: Exhaust port protected by a filter disc extends service intervals and reduces contamination risk. Business Impact: Minimizes maintenance downtime and protects downstream components in dirty factory environments. Application: Suitable for manufacturing cells and packaging lines with dusty or oily air streams. Feature: 3/2 valve operation provides straightforward on/off control with clear feedback. Business Impact: Simplifies logic in pneumatic circuits, accelerating commissioning and reducing wiring errors. Application: Common in pick-and-place feeds, indexing devices, and simple cylinder control. Feature: Materials - Body (zinc alloy) and Seals (nitrile rubber) deliver durability and chemical compatibility for standard compressed-air systems. Business Impact: Longer life in typical shop air quality, lowering replacement costs. Application: Compatible with standard plant air lines and Pneufit C fittings for quick field assembly. Feature: Series Martonair, Range M/21, Brand IMI Norgren ensure consistent performance and availability across spare parts. Business Impact: Streamlined procurement and predictable maintenance, reducing downtime risk. Application: Cross-model compatibility with related fittings and tubing (PA2 tubing, Pneufit C adapters) for scalable installations.
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FAQs
Begin by selecting compatible Pneufit C fittings (straight or 90° elbow variants) and the PA2 tubing in 6mm/4mm sizes to match your circuit layout. Ensure the valve body is mounted securely to a panel or bracket with minimal vibration. Route tubing to the exhaust and supply ports, trim excess tubing, and verify leak-free connections using approved soapy water or a compressed-air leak detector. This setup enables quick field assembly and straightforward maintenance, reducing downtime during upgrades or reworks.
The M/21/41 uses a 3/2 valve operation, meaning three ports and two positions. This configuration provides simple push-to-operate or mechanically actuated control with a direct path for air input and exhaust. It simplifies control logic for basic on/off cycling, indexing, or pilot-driven sequences in pneumatic circuits. For more complex logic, integrate with additional valves or sensors to build reliable automated sequences without added complexity in the actuator stage.
The valve includes an exhaust port protected by a filter disc, which helps reduce contamination in typical factory environments. For harsher conditions, pair the valve with appropriate filtration and desiccant dryers upstream, verify air quality, and consider enclosure protection or IP-rated variants where configured. Durable zinc alloy bodies and nitrile seals provide solid performance in standard shop air, while service intervals can be extended with regular maintenance.
Certification applicability depends on configuration and regional requirements. In practice, Norgren Martonair products are designed to support common industry certifications; CE compliance and IP-rated protections are available in suitable configurations, with SIL safety integration in safety-critical systems. Always confirm the exact variant’s qualification with the product datasheet and your compliance team to ensure alignment with your regulatory needs.
Expect ROI from reduced air consumption due to low pilot pressure, lower energy costs, and extended component life through gentle actuation and reduced mechanical stress. The compact form factor saves cabinet space and speeds installation, while compatible fittings and tubing simplify maintenance. In high-cycle lines, these benefits compound over time, leading to lower operating costs and faster time-to-value for automation projects.