The Festo DSNU-S-12-50-P-A-MQ is a compact double-acting round cylinder from the DSNU-S series, featuring a 12 mm bore and 50 mm stroke. Built with a high-alloy stainless steel piston rod and cylinder barrel, this unit is designed for moderate corrosion environments and is cleanroom-suitable up to ISO Class 5 — making it an excellent fit for food processing, pharmaceutical, and precision automation applications. Elastic cushioning rings at both ends protect the internal components under cyclic duty, and the M5 pneumatic port keeps the overall envelope extremely compact. Festo Part Number: 5211903. 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.
The DSNU-S-12-50-P-A-MQ belongs to Festo's DSNU-S series of round cylinders — a purpose-engineered line designed where space is tight, hygiene matters, and reliability under cyclic loading is non-negotiable. With a 12 mm bore and 50 mm stroke, this double-acting cylinder delivers controlled linear motion in both directions, powered by compressed air. The stainless steel barrel and piston rod, combined with ISO Class 5 cleanroom certification and LABS/PWIS conformity, make this model a strong choice wherever contamination control and corrosion resistance are equally important.
Key Features
High-alloy stainless steel cylinder barrel and piston rod — provides CRC 2 moderate corrosion resistance, suitable for washdown environments and humid production areas without additional protective coatings.
Cleanroom-rated to ISO 14644-1 Class 5 — independently verified low particle emission, making this cylinder directly suitable for pharmaceutical filling lines, medical device assembly, and precision electronics production.
LABS/PWIS conformity per VDMA 24364-B2-L — no paint-wetting impairment substances, critical for automotive paint shops and surface finishing lines where silicone and PWIS contamination cause costly rework.
Double-acting operation — positive thrust in both advance and return strokes (67.9 N advance / 50.9 N return at 6 bar), giving the designer full control of motion in both directions.
Elastic cushioning at both ends — absorbs end-of-stroke impact energy (rated 0.07 J), reducing mechanical stress and noise in high-cycle applications without requiring external shock absorbers at this bore size.
M5 pneumatic connection — the compact M5 port is ideal for micro-automation cells, multi-axis gantries, and anywhere fitting envelope needs to be minimised alongside the cylinder body.
Proximity switch compatible — the cylinder body supports position detection via proximity switch (accessories ordered separately), enabling easy integration with PLC feedback loops.
Wide ambient temperature range: -20 °C to +80 °C — handles sub-zero cold storage environments as well as elevated temperatures near ovens or dryers without seal degradation.
Any mounting position — no orientation restrictions simplify machine design, especially in multi-axis or inverted installations.
RoHS compliant — meets EU and UK RoHS directives, ensuring the cylinder can be incorporated into equipment exported to European and UK markets.
Technical Specifications
Parameter
Value
Festo Part Number
5211903
Model Number
DSNU-S-12-50-P-A-MQ
Series
DSNU-S
Cylinder Type
Round Cylinder
Mode of Operation
Double-acting
Piston Diameter (Bore)
12 mm
Stroke
50 mm
Piston Rod Thread
M6
Pneumatic Connection
M5
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
Position Detection
Via proximity switch (accessory, ordered separately)
Mounting Position
Any
Type of Mounting
With accessories
Operating Medium
Compressed air to ISO 8573-1:2010 [7:4:4]
Note on Operating Medium
Lubricated operation possible; if lubricated, lubrication must always be maintained
Ambient Temperature Range
-20 °C … +80 °C
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
Cylinder Barrel Material
High-alloy stainless steel
Piston Rod Material
High-alloy stainless steel
Cover Material
Anodised wrought aluminium alloy
Seal Material
TPE-U (PU)
Corrosion Resistance Class (CRC)
2 – Moderate corrosion stress
Cleanroom Suitability
Class 5 per ISO 14644-1 (measured per ISO 14644-14)
LABS (PWIS) Conformity
VDMA 24364-B2-L
RoHS Compliance
Yes – RoHS compliant
Common Applications
Pharmaceutical and medical device manufacturing — ISO Class 5 cleanroom rating makes this cylinder suitable for blister pack handling, vial positioning, and sterile assembly cells in LifeTech automation environments.
Food and beverage packaging lines — stainless steel barrel and LABS conformity allow use in direct-contact and near-contact zones on pouch filling machines, tray sealers, and labelling stations.
Precision electronics assembly — the compact 12 mm bore and M5 port fit naturally into pick-and-place units, PCB handling fixtures, and SMT line actuators common in Coimbatore's electronics manufacturing units.
Textile machinery — short-stroke actuation for yarn guides, needle selectors, and clamping mechanisms on shuttle looms and winding machines where installation space is extremely restricted.
Automotive paint shop automation — PWIS-free construction eliminates contamination risk in paint booths and primer application stations, where silicone traces cause fish-eye defects.
Analytical and laboratory equipment — cleanroom compatibility and repeatable force output suit valve actuation, sample handling, and pipette drive mechanisms in lab automation platforms.
Why Buy from Murali Pneumatics?
Authorized Festo Channel Partner since 1991 — over three decades of Festo product expertise based right here in Coimbatore, serving plant engineers across Tamil Nadu and South India.
100% genuine Festo products — every DSNU-S cylinder we supply comes with full Festo manufacturer warranty. No grey imports, no substitutes.
Ready stock of popular Festo cylinders — common bore and stroke combinations are maintained at our Mill Road store to support your urgent maintenance and project requirements.
Expert technical support — need help selecting the right mounting bracket, proximity switch, or flow control valve to pair with this cylinder? Call us at +91 98422 47546 and speak directly with a Festo-trained application engineer.
Compatible Accessories
Proximity switches (SME / SMT-8 series) — for position feedback; confirm groove type compatible with DSNU-S series before ordering
Mounting brackets and clevis joints (LBN / SG series) — for flange, foot, or swivel mounting to machine frames
Rod clevises and joints (SGS / SGL series) — for M6 piston rod thread connection to driven load
Flow control valves (GRLA / VFOE series, M5) — for speed regulation of advance and return strokes
M5 push-in fittings (QS-M5 series) — for 4 mm or 6 mm tubing quick-connect to the cylinder port
Polyurethane or nylon tubing (PUN / PLN series, 4mm OD) — compatible with M5 port fittings for clean air supply lines
Directional control valves (VUVG / VTUG series, M5) — to drive double-acting operation from a solenoid valve island
All accessories available from stock. Ask us to bundle your complete assembly.
