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All-stainless-steel double-acting round cylinder, specially designed for food, pharmaceutique, humid and corrosive environments. Equipped with pneumatic cushioning adjustable at both ends (PPV), it meets the requirements of dynamic load and speed regulation.
- Model Segment Definition
| Segment de modèle | Signification | Description détaillée |
| CRDSNU | Stainless steel round cylinder | CR = corrosion-resistant; D = double-acting; S = round type; NU = standard type; full stainless steel structure (barrel / end caps / piston rod) |
| 40 | Bore size | 40 mm, determines thrust and tension rating |
| 50 | Stroke | 50 mm, maximum travel distance of the piston |
| PPV | Cushioning type | Pneumatic cushioning adjustable at both ends; cushioning intensity adjustable independently on each side |
| UN | Piston rod end type | External thread (M12×1.25), standard mounting interface |
- Core Specification Parameters
| Catégorie de paramètre | Données techniques | Remarques |
| Basic Characteristics | ||
| Action type | À double effet | Requires air supply on both sides to realize push and pull motion |
| Alésage / Stroke | 40 mm / 50 mm | Standard size, suitable for medium and small loads |
| Piston rod specification | M12×1.25 external thread | Standard ISO thread for easy load connection |
| Taille du port | G1/8 | Air inlet / outlet port, compatible with standard pneumatic components |
| Paramètres de performances | ||
| Operating pressure range | 0.1–1.0 MPa (1–10 bar) | Suitable for most pneumatic systems |
| Theoretical thrust @ 6 bar | 754 N | Formule de calcul: F=π×(D/2)2×p |
| Theoretical tension @ 6 bar | 633 N | Calculated value after deducting piston rod area |
| Cushioning type | PPV (adjustable at both ends) | Cushioning stroke approx. 18 mm, adaptable to different speeds and loads |
| Plage de température | −40 °C … +120 °C | Conception à large température; S6 seal required for extreme high temperature |
| Matériel & Conformité | ||
| Main material | High-alloy stainless steel (CRC3) | Corrosion resistance Class 3, excellent anti-corrosion performance |
| Matériau du joint | Standard NBR / optional FKM | FKM suitable for high temperature and chemical environments |
| Lubrication grade | NSF‑H1 food-grade grease | Direct food contact acceptable, compliant with FDA requirements |
| Classe de protection | IP65 | Dustproof and waterproof, adapté aux environnements difficiles |
| Montage & Dimensions | ||
| Méthode de montage | Any mounting position | Compatible with various mounting accessories (bride / foot bracket / trunnion, etc.) |
| Position detection | Compatible with proximity sensors (SMT / SME series) | Magnetic switch optional for position feedback |
| Dimensions hors tout | Diameter 40 mm × Total length 180 mm | Structure compacte, saves installation space |
| Poids | Environ. 1.2 kilos | Stainless steel construction, robust and durable |
- Recommended Accessories List
| Type d'accessoire | Modèle | Description de la fonction |
| Mounting Accessories | ||
| Front flange | FNC‑40 | Front fixed mounting, adapté aux espaces étroits |
| Rear flange | FNCB‑40 | Rear fixed mounting for easy cylinder disassembly |
| Foot mounting bracket | HNC‑40 | Bottom support mounting with high stability |
| Trunnion mounting | HNZ‑40 | Swing mounting for angular operating conditions |
| Pneumatic Accessories | ||
| One-way flow control valve | VFOE‑3/8‑1/8 | G1/8 port, precise cylinder speed control |
| Push-in fitting | QS‑8‑1/8 | Fast tubing connection, installation facile |
| Silencer | U‑1/8 | Reduces exhaust noise and environmental noise pollution |
| Detection Accessories | ||
| Magnetic proximity switch | SME‑8‑NS‑24V‑KC | Position sensing, suitable for food-grade environments |
| Sensor mounting bracket | DMS‑40 | Fixes magnetic switch with flexible installation |
| Special Accessories | ||
| High-temperature seal kit | S6 | Adaptable to ambient temperature up to +120 °C |
| Extended piston rod | K8 | Extends effective stroke for special mounting requirements |
- Competitor & Comparaison entre marques
| Marque | Modèle | Matching Degree | Core Difference |
| Festo | CRDSNU-40-50-PPS-A | 100% | PPS = self-adjusting cushioning; PPV = manually adjustable cushioning (ce modèle) |
| Festo | DSNU-40-50-PPV-A | 90% | DSNU = carbon steel barrel; CRDSNU = full stainless steel with superior corrosion resistance |
| SMC | CD85N40-50-B | 85% | Stainless steel cylinder, double-acting, adjustable cushioning, R1/8 port |
| Arctique | SI40×50-P | 80% | Stainless steel cylinder, double-acting, elastic cushioning, rentable |
| Norgren | RM/8020/M/50 | 75% | Stainless steel cylinder, double-acting, self-adjusting cushioning, different mounting structure |
- Lignes directrices de sélection & Solutions alternatives
5.1 Three Key Selection Factors
Correspondance de charge: Thrust ≥ Load × 1.5 safety factor; 40 mm bore provides 754 N thrust @ 6 bar, suitable for load ≤ 500 N.
Stroke confirmation: Reserve ≥10 mm cushioning space for 50 mm stroke to avoid rigid impact.
Environmental adaptation:
Nourriture / pharmaceutical industry: Must adopt CRDSNU (full stainless steel + NSF‑H1 lubrication).
Haute température (>80°C): Equip with S6 high-temperature seal kit.
Chemical corrosion environment: Adopt FKM seals + CRC3 stainless steel.
5.2 Recommended Alternative Solutions
| Scénario d'application | Recommended Solution | Avantages |
| Standard food-grade environment | CRDSNU-40-50-PPV-A | Full stainless steel + adjustable cushioning, suitable for dynamic loads |
| Static load working condition | CRDSNU-40-50-PPS-A | Self-adjusting cushioning, maintenance-free, moindre coût |
| Ultra-high temperature (>120°C) | Custom high-temperature cylinder | Special seals and materials for extreme temperature conditions |
| Budget-limited project | Domestic stainless steel cylinder (par exemple. Airtac SI series) | Performances à coût élevé, meets basic functional requirements |
| Clean room environment | CRDSNU-40-50-PPV-A + A1 wiper ring | Enhanced chemical resistance, meets clean room standards |
5.3 Installation & Directives d'entretien
- Clean cylinder ports before installation to prevent impurities from entering and shortening seal service life.
- Cushioning adjustment: Start with minimum cushioning, then gradually increase to proper effect; avoid over-cushioning causing cylinder creeping.
- Pipe length ≤ 5 m, inner diameter ≥ 6 mm to ensure stable air supply.
- Regular inspection every 6 mois: Check seal condition, piston rod surface and cushioning performance; replace parts in time if abnormal.
- Rinse with clean water after use in food processing environments to keep the cylinder clean.
CRDSNU-40-50-PPV-A is a full stainless steel round cylinder developed by Festo for harsh working environments. Its core advantages include CRC3 corrosion resistance, PPV adjustable cushioning and NSF‑H1 food-grade lubrication, perfectly applicable to food & boisson, pharmaceutique, water treatment and other industries. Avec 40 mm bore, 50 mm stroke and adjustable cushioning at both ends, it flexibly adapts to various load and speed requirements, making it an ideal pneumatic actuator for harsh environments.
