Norgren PM/31021 Air Bellow - 2-3/4 dia, 2600 N
Part Number: PM/31021
Quick Summary
Norgren PM/31021 air bellow provides frictionless actuation for compact, high-force automation in pneumatic systems. Designers often struggle to achieve short strokes with substantial force without increasing size or maintenance. This actuator delivers smooth operation with no lubrication and a single-acting design, making it ideal where space is tight and reliability is critical. While the data sheet highlights a non-magnetic aluminium body and vibration isolation, users should verify regulatory marks such as CE and SIL with the supplier. For engineers, the combination of 2-3/4 dia, 20 mm stroke, and 0-8 bar operating range translates into predictable performance and easier integration with standard fittings. In short, it supports factory floor uptime and reduces lifecycle costs while enabling compact automation architectures.
Product Information
Extended Description
PM/31021 Norgren: Frictionless operation | No maintenance or lubrication | Ideal for short stroke, high-force applications | High vibration isolation level | Easy, compact installation
Medium
Compressed air
Operating Temperature
-30 ... 50 °C, -22 ... 122 °F
Operating Pressure
0 ... 8 bar, 0 ... 116 psi
Port Size
G1/4
Nominal Diameter
2-3/4"
Number Of Convolutions
1
Stroke Length
20 mm, 3/4"
Operation
Single acting
Magnetic/Non-magnetic
Non-magnetic
Theoretical Force
2600 N
Materials - Body
Aluminium
Dimensions - Height
80 mm
Dimensions - Length
80 mm
Dimensions - Width
80 mm
Weight
0.35 kg
Country of Origin
Germany
Range
PM/31000
Brand
IMI Norgren
Feature: Single-acting air bellow design reduces overall footprint and simplifies installation. Impact: Enables compact fixtures and retrofit projects, cutting enclosure size and installation time. Application: Ideal for tight automation zones where short strokes must still deliver substantial actuation force. Feature: Frictionless operation with no lubrication required. Impact: Reduces maintenance costs and consumables, boosting line uptime and predictable performance. Application: Continuous production lines and automated handling where lubricant-free operation is advantageous. Feature: High theoretical force of 2600 N at 2-3/4 dia and 20 mm stroke. Impact: Delivers strong actuation in short-stroke packages, enabling robust clamping and quick work-piece expulsion. Application: Press-side actuations, gripping fixtures, and high-force release modules within compact footprints. Feature: Aluminium, non-magnetic body. Impact: Light-weight construction with compatibility in magnetic-sensitive environments; simplifies integration into varied systems. Application: Robotics fixtures and sensor-adjacent mechanisms where magnetic interference must be minimized. Feature: G1/4 port and 0–8 bar operating range. Impact: Easy integration with standard pneumatic hardware and flexible supply options, reducing system redesign. Application: Retrofit projects and new lines where existing valves and regulators are in use. Feature: High vibration isolation and compact installation. Impact: Mitigates chatter and component wear in dynamic environments, supporting longer life and steadier cycles. Application: Automotive, packaging, and textile automation lines requiring reliable actuation under vibration.
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FAQs
PM/31021 uses a standard G1/4 port and should be mounted on a rigid, vibration-free plate. Use appropriate thread sealing and mounting hardware, verify alignment to prevent side loads, and connect to a regulator or filter-regulator-lair supply capable of 0–8 bar. Lubrication is not required, so follow the datasheet for attachment and torque recommendations to ensure a reliable, leak-free installation.
Theoretical force is 2600 N at the specified 2-3/4 dia and 20 mm stroke. Actual force depends on supply pressure, friction, load position, and alignment. Operates across 0–8 bar with frictionless movement, so factor in dynamic loads and mounting constraints. For accurate performance, validate with a controlled test under your specific load condition and installation geometry.
Yes, the PM/31021 design emphasizes high vibration isolation and non-magnetic aluminium construction. Ensure mounting is rigid and that the fixture can withstand expected vibration levels. In practice, this configuration reduces chatter and wear, supporting longer service life in packaging, automotive, and manufacturing lines subject to periodic shocks or rhythmic vibration.
The provided data does not specify formal certifications such as CE, SIL, or IP ratings. For regulated applications, confirm certification status and documentation with Norgren or the distributor before installation. Request the latest datasheet and compliance certificates to ensure alignment with your system’s regulatory requirements.
PM/31021 provides frictionless operation with no lubrication, reducing ongoing maintenance and consumable costs. Its aluminium non-magnetic body keeps weight down while enabling compatibility in sensitive environments. The combination of compact installation, predictable performance, and vibration isolation translates to lower downtime and longer equipment life in automated lines.