Festo DSNU-S-12-25-P-A-MQ – Round Cylinder | Bore 12mm, Stroke 25mm | Murali Pneumatics Coimbatore

About the Festo DSNU-S-12-25-P-A-MQ Round Cylinder

The DSNU-S-12-25-P-A-MQ is a miniature double-acting round cylinder from Festo's DSNU-S series — the stainless steel variant of the well-established DSNU round cylinder family. With a 12mm piston diameter and 25mm stroke, this cylinder is designed for applications where space is tight and environmental conditions demand more than standard aluminium-bodied cylinders can offer. The fully stainless steel piston rod and cylinder barrel, combined with cleanroom Class 5 certification and LABS/PWIS conformity, make it a natural fit for food processing, pharmaceutical automation, and precision handling lines across Coimbatore and South India.

Key Features

• Stainless steel cylinder barrel and piston rod — High-alloy stainless steel construction provides superior corrosion resistance (CRC 2), suitable for wash-down environments and moderately aggressive media exposure.
• Cleanroom Class 5 certified (ISO 14644-1) — Measured according to ISO 14644-14; suitable for pharmaceutical, semiconductor, and medical device assembly lines where airborne particle counts are critical.
• LABS/PWIS conformity (VDMA24364-B2-L) — Paint-wetting impairment substance free; safe for use in automotive and precision finishing environments where surface contamination must be avoided.
• Double-acting operation — Powered stroke in both advance and return directions; advance stroke force 67.9 N and return stroke force 50.9 N at 6 bar, providing positive control in both directions.
• Elastic cushioning at both ends — Built-in end-position cushioning absorbs impact (0.07 J rated) without the need for external shock absorbers in most light-duty cycles.
• M5 pneumatic connection — Compact port size consistent with the 12mm bore class; minimises envelope dimensions and integrates neatly into multi-function manifold and sub-base arrangements.
• Any mounting position — No orientation restrictions; flexible for OEM machine builders who need to finalise mounting angles late in design.
• Proximity switch compatible — Groove/slot on barrel allows standard Festo proximity switches for end-position detection without adding external brackets.
• Wide ambient temperature range: -20 °C to +80 °C — Operates reliably in cold store environments as well as near process heat in textile and plastic machinery.
• RoHS compliant — Meets EU and UK RoHS directives; suitable for CE-marked machine builds without material compliance issues.

Technical Specifications

Parameter	Value
Festo Part Number	5211899
Model Number	DSNU-S-12-25-P-A-MQ
Cylinder Type	Round Cylinder (DSNU-S Series)
Mode of Operation	Double-acting
Piston Diameter (Bore)	12 mm
Stroke	25 mm
Piston Rod Thread	M6
Operating Pressure	1.5 bar … 10 bar (0.15 MPa … 1 MPa)
Pneumatic Connection	M5
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 in End Positions	0.07 J
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
Mounting Position	Any
Type of Mounting	With accessories
Position Detection	Via proximity switch
Operating Medium	Compressed air to ISO 8573-1:2010 [7:4:4]
Note on Operating Medium	Lubricated operation possible (lubrication must then be maintained continuously)
Ambient Temperature	-20 °C … +80 °C
Cylinder Barrel Material	High-alloy stainless steel
Piston Rod Material	High-alloy stainless steel
Cover Material	Anodised wrought aluminium alloy
Seal Material	TPE-U (Polyurethane)
Corrosion Resistance Class (CRC)	2 – Moderate corrosion stress
Cleanroom Suitability	Class 5 per ISO 14644-1 (measured per ISO 14644-14)
LABS (PWIS) Conformity	VDMA24364-B2-L
RoHS Compliance	Yes – compliant
Circuit Symbol	00991217

Common Applications

• Pharmaceutical and medical device assembly — Cleanroom Class 5 rating and stainless steel construction make this cylinder suitable for tablet press ejection, vial handling, and blister pack indexing in sterile environments.
• Food and beverage packaging lines — LABS-compliant and wash-down friendly; used for product diverting, lid pressing, and portion gate actuation on filling and sealing machines.
• Precision pick-and-place in electronics assembly — The compact 12mm bore and miniature stroke suit tight-clearance handling jigs in PCB and component assembly fixtures common in Coimbatore's electronics manufacturing sector.
• Textile machinery micro-actuation — Thread guides, tension arm positioning, and yarn feed gates on spinning and weaving machines where small bore cylinders with reliable end cushioning are essential.
• Plastic injection moulding auxiliaries — Ejector gate actuation, side core locking, and part removal assist functions where a compact, corrosion-resistant cylinder is needed adjacent to mould cooling water circuits.
• Automotive body shop and paint-line conveyors — PWIS/LABS conformity ensures no silicone or wetting-agent contamination risk near paint booths; suitable for carrier indexing and latch mechanisms.

Why Buy from Murali Pneumatics?

• Authorized Festo Channel Partner since 1991 — Over three decades of Festo product experience in Coimbatore's industrial sector; we know this product range inside out.
• 100% genuine products with full Festo warranty — Every unit sourced directly through official Festo supply channels; no grey-market risk, no warranty gaps.
• Ready stock of popular DSNU-S variants — Common bore and stroke combinations are maintained at our Mill Road store for same-day or next-day fulfillment.
• Expert technical support — Need help selecting stroke length, mounting accessories, or compatible proximity switches? Call us at +91 98422 47546 — we give real answers, not just datasheets.

Compatible Accessories

• Proximity switches (SME, SMT-8 series) — T-slot or C-slot reed and electronic switches for end-position feedback; specify NPN/PNP output to suit your PLC input card.
• Mounting brackets and foot mounts (LB, FN series) — Festo accessory kits for front flange, rear flange, and swivel-foot mounting to suit any machine structure.
• Clevis and rod eye joints (SG, SGS series) — M6 rod-end joints for pivot mounting and angular misalignment compensation.
• M5 push-in fittings (QSM series) — Mini push-in fittings for 4mm and 6mm OD tubing; match to your existing tubing system.
• Flow control valves (GRLA, GRLZ series) — Meter-out or meter-in speed controllers for M5 ports to set precise advance and return speeds.
• Miniature silencers (U series) — M5 thread silencers to reduce exhaust noise at the valve or directly at the cylinder port.

All accessories available from stock at Murali Pneumatics, Coimbatore. Ask us to bundle your complete cylinder assembly — cylinder, fittings, switches, and speed controllers — as a ready-to-install kit.