Festo CRDSNU Stainless Steel Round Cylinder — ISO 15552 Food-Grade Corrosion-Resistant Pneumatic Actuator (91 Models) Specs & Selection Guide
2026-06-14
The Festo CRDSNU Series Stainless Steel Round Cylinder is a high-performance pneumatic actuator conforming to ISO 15552 (ISO 6431 / VDMA 24562) standards, specifically designed for corrosive environments and applications with stringent hygienic requirements. Featuring a fully stainless steel construction and Clean Design architecture, the CRDSNU series not only delivers exceptional corrosion resistance but also complies with EU Regulation (EC) 1935/2004 and FDA standards for direct food contact. The self-adjusting pneumatic end-position cushioning (PPS) technology significantly reduces commissioning time while automatically optimizing cushioning performance under varying load and speed conditions for long-term reliable operation.
Key Features & Highlights
- Fully Stainless Steel Construction: Manufactured from high-quality stainless steel grades 1.4301 and 1.4401, providing outstanding resistance to corrosive environmental conditions
- Clean Design Architecture: Smooth, crevice-free surfaces meeting hygienic requirements of food and pharmaceutical industries
- Food Contact Compliant: Conforms to EU Regulation (EC) 1935/2004; seals and NSF-H1 grease comply with FDA standards for direct food contact
- Self-Adjusting Cushioning (PPS): Automatically adapts to load and speed variations for optimal cushioning without manual adjustment, reducing commissioning time
- Optional Dry-Running Seals: Extended service life with reduced maintenance requirements for demanding applications
- Extensive Derivative Range: Available in standard (P-A) and B-type (PPS-MG-A1) configurations to meet diverse application requirements
- ISO International Standards: Compliant with ISO 15552 / ISO 6431 / VDMA 24562 for excellent mounting compatibility
- Position Sensing: Compatible with proximity sensors for precise piston position detection and motion control
Technical Specifications
| Parameter | Specification |
|---|---|
| Series | CRDSNU |
| Type | Stainless Steel Round Cylinder (ISO 15552 Standard Cylinder) |
| Piston Diameter Range | 12 / 16 / 20 / 25 / 32 / 40 / 50 / 63 / 80 / 100 mm |
| Stroke Range | 10 – 200 mm (varies by piston diameter and configuration) |
| Cushioning | P – Adjustable pneumatic cushioning at both ends / PPS – Self-adjusting pneumatic end-position cushioning |
| Material | Stainless Steel 1.4301 / 1.4401 (barrel, end caps, piston rod) |
| Seals | FDA-compliant, NSF-H1 food-grade grease |
| Standards | ISO 15552 / ISO 6431 / VDMA 24562 |
| Food Compliance | EU Regulation (EC) 1935/2004 |
| Operating Medium | Compressed air, lubricated or non-lubricated |
| Position Sensing | Supported via proximity sensors |
Model Number Naming Convention
The CRDSNU series model naming format is: CRDSNU-[B-][Piston Diameter]-[Stroke]-[Cushioning]-[Connection]
- CRDSNU: Series designation — Stainless Steel Round Cylinder (ISO 15552)
- B: Optional prefix for B-type derivative series (with PPS self-adjusting cushioning and MG-A1 connection)
- Piston Diameter: 12 / 16 / 20 / 25 / 32 / 40 / 50 / 63 / 80 / 100 mm
- Stroke: 10 / 15 / 20 / 25 / 40 / 50 / 80 / 100 / 125 / 160 / 200 mm
- P: Adjustable pneumatic cushioning (standard type) / PPS: Self-adjusting pneumatic end-position cushioning (B-type)
- A / MG-A1: Connection type (A for standard, MG-A1 for B-type)
Complete CRDSNU Series Model List
The following table lists all 91 standard models in the FESTO CRDSNU series, covering 10 piston diameters, multiple stroke options, and both standard and B-type configurations:
| Order Code | Part Number | Piston Diameter (mm) | Stroke (mm) | Cushioning | Type |
|---|---|---|---|---|---|
| CRDSNU-12- | 552787 | 12 | – | – | 基本型 |
| CRDSNU-12-10-P-A | 8152524 | 12 | 10 | P | 标准型-A |
| CRDSNU-12-25-P-A | 8152525 | 12 | 25 | P | 标准型-A |
| CRDSNU-12-40-P-A | 8152526 | 12 | 40 | P | 标准型-A |
| CRDSNU-12-50-P-A | 8152527 | 12 | 50 | P | 标准型-A |
| CRDSNU-12-80-P-A | 8152528 | 12 | 80 | P | 标准型-A |
| CRDSNU-12-100-P-A | 8152529 | 12 | 100 | P | 标准型-A |
| CRDSNU-16- | 552788 | 16 | – | – | 基本型 |
| CRDSNU-16-10-P-A | 8152548 | 16 | 10 | P | 标准型-A |
| CRDSNU-B-16-10-P-A-MG-A1 | 8073759 | 16 | 10 | P | B型-MG-A1 |
| CRDSNU-16-15-P-A | 8152549 | 16 | 15 | P | 标准型-A |
| CRDSNU-16-20-P-A | 8152550 | 16 | 20 | P | 标准型-A |
| CRDSNU-16-25-P-A | 8152551 | 16 | 25 | P | 标准型-A |
| CRDSNU-B-16-25-P-A-MG-A1 | 8073760 | 16 | 25 | P | B型-MG-A1 |
| CRDSNU-16-40-P-A | 8152552 | 16 | 40 | P | 标准型-A |
| CRDSNU-B-16-40-P-A-MG-A1 | 8073761 | 16 | 40 | P | B型-MG-A1 |
| CRDSNU-16-50-P-A | 8152553 | 16 | 50 | P | 标准型-A |
| CRDSNU-B-16-50-P-A-MG-A1 | 8073762 | 16 | 50 | P | B型-MG-A1 |
| CRDSNU-16-80-P-A | 8152554 | 16 | 80 | P | 标准型-A |
| CRDSNU-B-16-80-P-A-MG-A1 | 8073763 | 16 | 80 | P | B型-MG-A1 |
| CRDSNU-16-100-P-A | 8152555 | 16 | 100 | P | 标准型-A |
| CRDSNU-B-16-100-P-A-MG-A1 | 8073764 | 16 | 100 | P | B型-MG-A1 |
| CRDSNU-B-16-125-P-A-MG-A1 | 8073765 | 16 | 125 | P | B型-MG-A1 |
| CRDSNU-B-16-160-P-A-MG-A1 | 8073766 | 16 | 160 | P | B型-MG-A1 |
| CRDSNU-B-16-200-P-A-MG-A1 | 8073767 | 16 | 200 | P | B型-MG-A1 |
| CRDSNU-20- | 552789 | 20 | – | – | 基本型 |
| CRDSNU-20-10-P-A | 8152557 | 20 | 10 | P | 标准型-A |
| CRDSNU-B-20-10-PPS-A-MG-A1 | 8073980 | 20 | 10 | PPS | B型-MG-A1 |
| CRDSNU-20-15-P-A | 8152558 | 20 | 15 | P | 标准型-A |
| CRDSNU-20-20-P-A | 8152559 | 20 | 20 | P | 标准型-A |
| CRDSNU-20-25-P-A | 8152560 | 20 | 25 | P | 标准型-A |
| CRDSNU-B-20-25-PPS-A-MG-A1 | 8073979 | 20 | 25 | PPS | B型-MG-A1 |
| CRDSNU-20-40-P-A | 8152561 | 20 | 40 | P | 标准型-A |
| CRDSNU-B-20-40-PPS-A-MG-A1 | 8073978 | 20 | 40 | PPS | B型-MG-A1 |
| CRDSNU-20-50-P-A | 8152562 | 20 | 50 | P | 标准型-A |
| CRDSNU-B-20-50-PPS-A-MG-A1 | 8073977 | 20 | 50 | PPS | B型-MG-A1 |
| CRDSNU-20-80-P-A | 8152563 | 20 | 80 | P | 标准型-A |
| CRDSNU-B-20-80-PPS-A-MG-A1 | 8073976 | 20 | 80 | PPS | B型-MG-A1 |
| CRDSNU-20-100-P-A | 8152564 | 20 | 100 | P | 标准型-A |
| CRDSNU-B-20-100-PPS-A-MG-A1 | 8073975 | 20 | 100 | PPS | B型-MG-A1 |
| CRDSNU-B-20-125-PPS-A-MG-A1 | 8073974 | 20 | 125 | PPS | B型-MG-A1 |
| CRDSNU-B-20-160-PPS-A-MG-A1 | 8073973 | 20 | 160 | PPS | B型-MG-A1 |
| CRDSNU-B-20-200-PPS-A-MG-A1 | 8073972 | 20 | 200 | PPS | B型-MG-A1 |
| CRDSNU-25- | 552790 | 25 | – | – | 基本型 |
| CRDSNU-25-10-P-A | 8152627 | 25 | 10 | P | 标准型-A |
| CRDSNU-B-25-10-PPS-A-MG-A1 | 2159636 | 25 | 10 | PPS | B型-MG-A1 |
| CRDSNU-25-15-P-A | 8152628 | 25 | 15 | P | 标准型-A |
| CRDSNU-25-20-P-A | 8152629 | 25 | 20 | P | 标准型-A |
| CRDSNU-25-25-P-A | 8152630 | 25 | 25 | P | 标准型-A |
| CRDSNU-B-25-25-PPS-A-MG-A1 | 2159637 | 25 | 25 | PPS | B型-MG-A1 |
| CRDSNU-25-40-P-A | 8152631 | 25 | 40 | P | 标准型-A |
| CRDSNU-B-25-40-PPS-A-MG-A1 | 2159638 | 25 | 40 | PPS | B型-MG-A1 |
| CRDSNU-25-50-P-A | 8152632 | 25 | 50 | P | 标准型-A |
| CRDSNU-B-25-50-PPS-A-MG-A1 | 2159639 | 25 | 50 | PPS | B型-MG-A1 |
| CRDSNU-25-80-P-A | 8152633 | 25 | 80 | P | 标准型-A |
| CRDSNU-B-25-80-PPS-A-MG-A1 | 2159640 | 25 | 80 | PPS | B型-MG-A1 |
| CRDSNU-25-100-P-A | 8152634 | 25 | 100 | P | 标准型-A |
| CRDSNU-B-25-100-PPS-A-MG-A1 | 2159641 | 25 | 100 | PPS | B型-MG-A1 |
| CRDSNU-B-25-125-PPS-A-MG-A1 | 2159642 | 25 | 125 | PPS | B型-MG-A1 |
| CRDSNU-B-25-160-PPS-A-MG-A1 | 2159643 | 25 | 160 | PPS | B型-MG-A1 |
| CRDSNU-B-25-200-PPS-A-MG-A1 | 2159644 | 25 | 200 | PPS | B型-MG-A1 |
| CRDSNU-32- | 552791 | 32 | – | – | 基本型 |
| CRDSNU-32-10-P-A | 8152637 | 32 | 10 | P | 标准型-A |
| CRDSNU-B-32-10-PPS-A-MG-A1 | 2176399 | 32 | 10 | PPS | B型-MG-A1 |
| CRDSNU-32-25-P-A | 8152638 | 32 | 25 | P | 标准型-A |
| CRDSNU-B-32-25-PPS-A-MG-A1 | 2176400 | 32 | 25 | PPS | B型-MG-A1 |
| CRDSNU-32-40-P-A | 8152639 | 32 | 40 | P | 标准型-A |
| CRDSNU-B-32-40-PPS-A-MG-A1 | 2176401 | 32 | 40 | PPS | B型-MG-A1 |
| CRDSNU-32-50-P-A | 8152640 | 32 | 50 | P | 标准型-A |
| CRDSNU-B-32-50-PPS-A-MG-A1 | 2176402 | 32 | 50 | PPS | B型-MG-A1 |
| CRDSNU-32-80-P-A | 8152641 | 32 | 80 | P | 标准型-A |
| CRDSNU-B-32-80-PPS-A-MG-A1 | 2176403 | 32 | 80 | PPS | B型-MG-A1 |
| CRDSNU-32-100-P-A | 8152642 | 32 | 100 | P | 标准型-A |
| CRDSNU-B-32-100-PPS-A-MG-A1 | 2176404 | 32 | 100 | PPS | B型-MG-A1 |
| CRDSNU-B-32-125-PPS-A-MG-A1 | 2176405 | 32 | 125 | PPS | B型-MG-A1 |
| CRDSNU-B-32-160-PPS-A-MG-A1 | 2176406 | 32 | 160 | PPS | B型-MG-A1 |
| CRDSNU-B-32-200-PPS-A-MG-A1 | 2176407 | 32 | 200 | PPS | B型-MG-A1 |
| CRDSNU-40- | 552792 | 40 | – | – | 基本型 |
| CRDSNU-B-40-10-PPS-A-MG-A1 | 8073989 | 40 | 10 | PPS | B型-MG-A1 |
| CRDSNU-B-40-25-PPS-A-MG-A1 | 8073988 | 40 | 25 | PPS | B型-MG-A1 |
| CRDSNU-B-40-40-PPS-A-MG-A1 | 8073987 | 40 | 40 | PPS | B型-MG-A1 |
| CRDSNU-B-40-50-PPS-A-MG-A1 | 8073986 | 40 | 50 | PPS | B型-MG-A1 |
| CRDSNU-B-40-80-PPS-A-MG-A1 | 8073985 | 40 | 80 | PPS | B型-MG-A1 |
| CRDSNU-B-40-100-PPS-A-MG-A1 | 8073984 | 40 | 100 | PPS | B型-MG-A1 |
| CRDSNU-B-40-125-PPS-A-MG-A1 | 8073983 | 40 | 125 | PPS | B型-MG-A1 |
| CRDSNU-B-40-160-PPS-A-MG-A1 | 8073982 | 40 | 160 | PPS | B型-MG-A1 |
| CRDSNU-B-40-200-PPS-A-MG-A1 | 8073981 | 40 | 200 | PPS | B型-MG-A1 |
| CRDSNU-50- | 552793 | 50 | – | – | 基本型 |
| CRDSNU-63- | 552794 | 63 | – | – | 基本型 |
| CRDSNU-80 | 8126418 | 80 | – | – | 基本型 |
| CRDSNU-100 | 8126417 | 100 | – | – | 基本型 |
Application Industries
- Food Processing & Packaging: FDA and EC 1935/2004 compliant for direct food contact, suitable for filling, sealing, and sorting equipment
- Pharmaceuticals & Biotechnology: Clean Design architecture and corrosion resistance ideal for GMP cleanroom production environments
- Chemical Industry: High-alloy stainless steel resists chemical corrosion for valve actuation, agitator control, and corrosive media handling
- Marine Engineering & Shipbuilding: Grade 1.4401 high-grade stainless steel withstands salt-spray corrosion for deck equipment and hatch control
- Water Treatment Technology: Long-term reliable operation in humid and chemical agent environments
- Life Sciences: Suitable for laboratory automation equipment, medical devices, and clean environment applications
Related Series
- CRHD Series: Stainless steel round cylinder for harsh corrosive environments with flexible end cap options
- DSNU Series: Standard round cylinder for general industrial environments
- DSNU-S Series: Round cylinder with self-locking mechanism for safety-critical applications
- CRDNG Series: Stainless steel standard cylinder, ISO 15552 compliant, corrosion-resistant design
Frequently Asked Questions
Q: What is the main difference between the CRDSNU and CRHD series?
A: Both are stainless steel round cylinders but with different positioning. The CRDSNU conforms to ISO 15552 international standards, features self-adjusting pneumatic end-position cushioning (PPS) technology, and has FDA-compliant seals and grease for direct food contact. The CRHD series focuses more on multiple end cap configurations and connection options (MQ/MC/MS) with an optional heat-resistant version (S6). If your application requires food contact compliance and ISO-standard mounting, CRDSNU is the more suitable choice.
Q: What is the difference between P and PPS cushioning on CRDSNU?
A: P cushioning (standard type) features adjustable pneumatic cushioning at both ends, requiring manual adjustment of the cushioning valve for optimal performance. PPS cushioning (B-type) is a self-adjusting pneumatic end-position cushioning system that automatically adapts to varying loads and speeds without manual tuning — ideal for applications with frequently changing loads or where rapid commissioning is needed. B-type (PPS) and standard-type (P) series are fully interchangeable in mounting dimensions.
Q: What is the expected service life of CRDSNU cylinders? Are dry-running options available?
A: CRDSNU cylinders come standard with long-life seals, with optional dry-running seals available for further extended service life. Dry-running seals operate reliably without lubrication, reducing maintenance frequency and costs. In cleanroom applications, the dry-running option also eliminates the risk of grease contamination. Actual service life depends on operating conditions (cycle frequency, load, environment) — consult a FESTO engineer for application-specific recommendations.
Q: What does the “B” prefix mean in CRDSNU model numbers?
A: The B prefix designates a B-type derivative series characterized by: PPS self-adjusting pneumatic end-position cushioning (replacing standard P-cushioning) and MG-A1 connection type (replacing standard A-connection). The B-type series covers piston diameters from 16 to 40 mm with various stroke options, making it ideal for applications requiring automatic cushioning adaptation and specialized connection configurations.
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Technical Documentation: CRDSNU Product Catalog & Technical Manual (PDF)
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