Festo DSNU-S-12-20-P-A-MQ – Round Cylinder | Bore 12mm, Stroke 20mm | Murali Pneumatics Coimbatore
The Festo DSNU-S-12-20-P-A-MQ is a compact double-acting round cylinder from the DSNU-S series, featuring a 12 mm piston diameter and 20 mm stroke. Built with high-alloy stainless steel piston rod and cylinder barrel, it is rated for cleanroom use up to ISO Class 5 and handles operating pressures from 1.5 to 10 bar. Its M5 push-in port (MQ variant) and any-position mounting make it ideal for tight-space automation in food processing, pharmaceutical, and precision packaging applications. Festo Part Number: 5211898. Available with Murali Pneumatics, your authorized Festo dealer in Coimbatore.
Note: This cylinder is supplied as a base unit. Proximity switches for position detection, mounting accessories, flow control valves, and fittings must be ordered separately.
Specifications
| Series | DSNU-S |
| Festo Part Number | 5211898 |
| Cylinder Type | Round Cylinder – Double-Acting |
| Bore Size | 12 mm |
| Stroke Length | 20 mm |
| Operating Principle | Double-Acting |
| Piston Rod Thread | M6 |
| Pneumatic Connection | M5 (MQ Integrated Push-In Port) |
| Operating Pressure | 1.5 bar … 10 bar (0.15 MPa … 1 MPa) |
| Cushioning | Elastic Cushioning at Both Ends |
| Mounting Type | With Accessories (Ordered Separately) |
| Position Sensing | Via Proximity Switch (Ordered Separately) |
| Body Material | High-Alloy Stainless Steel |
| Seal Material | TPE-U (Polyurethane) |
| Ambient Temperature Range | −20 °C … +80 °C |
| Cleanroom Class | ISO 14644-1 Class 5 |
| Corrosion Resistance Class | CRC 2 – Moderate Corrosion Stress |
| RoHS Compliant | Yes |
Product Description
About the Festo DSNU-S-12-20-P-A-MQ Round Cylinder
The DSNU-S-12-20-P-A-MQ is a miniature double-acting round cylinder from Festo's DSNU-S series — the stainless-steel-enhanced variant of the widely used DSNU ISO round cylinder family. With a 12 mm bore and 20 mm stroke, this cylinder is engineered for installations where space is at a premium and hygiene or environmental cleanliness is a non-negotiable requirement. The all-stainless internals (piston rod and cylinder barrel in high-alloy stainless steel) combined with ISO Class 5 cleanroom certification make this unit a step above standard round cylinders in demanding applications.Key Features
- High-alloy stainless steel piston rod and cylinder barrel — Provides excellent corrosion resistance for washdown, food-grade, and mildly aggressive environments (CRC 2).
- ISO 14644-1 Class 5 cleanroom suitability — Measured per ISO 14644-14; safe for use in pharmaceutical production, medical device assembly, and precision electronics environments.
- Double-acting operation — Delivers controlled force on both advance and return strokes; advance force 67.9 N and return force 50.9 N at 6 bar.
- M5 push-in port (MQ variant) — The integrated MQ push-in fitting connection at M5 eliminates the need for separate fittings at the port, reducing installation time and potential leak points.
- Elastic cushioning at both ends — Built-in end-position cushioning absorbs impact energy (0.07 J rated), protecting the mechanism and reducing noise in high-cycle applications.
- Any mounting position — No orientation restriction, simplifying machine design and allowing flexible layout changes without re-specifying the cylinder.
- Wide operating temperature range (−20 °C to +80 °C) — Suitable for cold-room packaging lines and elevated-temperature processing environments.
- LABS/PWIS conformity (VDMA 24364-B2-L) — Safe for use in paint shop adjacent equipment and spray-coating environments where surface-active substances must be avoided.
- RoHS compliant — Meets EU and international requirements for restricted hazardous substances, supporting sustainable manufacturing.
- TPE-U (polyurethane) seals — High wear resistance and good low-temperature flexibility, extending service life in demanding duty cycles.
Technical Specifications
| Parameter | Value |
|---|---|
| Festo Part Number | 5211898 |
| Model Number | DSNU-S-12-20-P-A-MQ |
| Cylinder Type | Round cylinder (DSNU-S series) |
| Mode of Operation | Double-acting |
| Piston Diameter (Bore) | 12 mm |
| Stroke | 20 mm |
| Piston Rod Thread | M6 |
| Pneumatic Connection | M5 (MQ push-in port integrated) |
| Operating Pressure | 1.5 bar … 10 bar (0.15 MPa … 1 MPa) |
| Theoretical Force – Advance Stroke at 6 bar | 67.9 N |
| Theoretical Force – Return Stroke at 6 bar | 50.9 N |
| Cushioning | Elastic cushioning rings/plates at both ends |
| Impact Energy at End Positions | 0.07 J |
| Mounting Position | Any |
| Type of Mounting | With accessories (ordered separately) |
| Position Detection | Via proximity switch (switch ordered separately) |
| Operating Medium | Compressed air per ISO 8573-1:2010 [7:4:4] |
| Note on Operating Medium | Lubricated operation possible; if lubricated, must remain lubricated throughout service life |
| Ambient Temperature | −20 °C … +80 °C |
| Cleanroom Suitability | Class 5 per ISO 14644-1 (measured per ISO 14644-14) |
| Corrosion Resistance Class | CRC 2 – Moderate corrosion stress |
| LABS / PWIS Conformity | VDMA 24364-B2-L |
| Material – Cylinder Barrel | High-alloy stainless steel |
| Material – Piston Rod | High-alloy stainless steel |
| Material – Cover | Anodised wrought aluminium alloy |
| Material – Seals | TPE-U (Polyurethane) |
| Moving Mass (0 mm stroke) | 16.2 g |
| Additional Moving Mass per 10 mm Stroke | 2 g |
| Basic Weight (0 mm stroke) | 35.9 g |
| Additional Weight per 10 mm Stroke | 4.2 g |
| Approximate Total Weight (20 mm stroke) | ~44.3 g |
| RoHS Compliant | Yes |
Common Applications
- Food and beverage packaging lines — Stainless internals and cleanroom rating make this cylinder suitable for portioning, sealing, and label-application stations that undergo regular washdown.
- Pharmaceutical blister and strip packaging — ISO Class 5 cleanroom rating supports tablet transfer, blister pushing, and small-part ejection in controlled manufacturing environments.
- Textile machinery micro-actuation — Compact 12 mm bore fits within spindle frames and yarn-guide mechanisms on spinning and winding machines common in Coimbatore's textile industry.
- Precision electronic assembly jigs — Controlled low-force output suits component clamping, PCB positioning, and connector insertion in electronics manufacturing.
- Medical device and lab automation — Cleanroom suitability and stainless construction are preferred in pipette handling, sample positioning, and diagnostic equipment assembly.
- Plastic moulding ancillary systems — Used for gate-runner separation, small part ejection, and core-pull assistance where compact envelope and reliable cycling matter.
Why Buy from Murali Pneumatics?
- Authorized Festo Channel Partner since 1991 — Over three decades of Festo expertise in Coimbatore means you get the right product specified correctly the first time.
- 100% genuine Festo products — Every unit sold carries full Festo manufacturer warranty. No grey-market stock, no counterfeits.
- Ready stock of popular DSNU-S variants — Common bore and stroke combinations are maintained at our Mill Road store for fast dispatch across Tamil Nadu.
- Expert technical support — Need help selecting the right stroke, mounting bracket, or proximity switch? Call or WhatsApp us at +91 98422 47546 — we give you a straight answer, not a brochure.
Compatible Accessories
- Proximity switches (SME-8, SMT-8 series) — For position detection on the T-slot or barrel of the DSNU-S; specify switch type based on PNP/NPN output and voltage requirement.
- Mounting brackets and flanges — LBN, CRBN, and FA series mounting accessories for DSNU round cylinders; ordered separately to suit your machine interface.
- Clevis and rod-eye joints — SGS/SG series for articulated end connections where slight angular misalignment must be accommodated.
- Flow control valves (GRLA, GRLZ series) — Meter-out speed control for smooth, repeatable stroke velocity on both extend and retract.
- M5 push-in fittings and tubing — Compatible Festo QSM-M5 fittings and 4 mm OD polyurethane tubing for pneumatic connection to the MQ port.
- Miniature silencers (U series) — M5-threaded silencers to reduce exhaust noise at directional control valves feeding this cylinder.
