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Product Overview & Sanitary Snap-In Performance
The SOSHH® SF Snap-In Flexible Connector is a sanitary flexible sleeve designed for tool-free installation in powder and bulk material handling. It snaps into standard internal pipeline grooves without tools, clamps, or external hardware. Designed to reduce powder entrapment and cross-contamination in pharmaceutical and food processing lines.
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![SOSHH® ATEX anti-static and high temperature PU sleeve material specification matrix chart]()
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![SOSHH® food-grade transparent PU flexible connector sleeve with stainless steel throat clamps]()
Key Engineering Features & Interchangeable Design
• Standard Spigot Compatibility: Interchangeable with industry-standard quick-connect snap-in fittings and standard grooved spigots. Allows instant field replacement without line modification or piping re-engineering.
- Tool-Free Installation: Field operators can snap the connector into place by hand, reducing downtime during cleaning and maintenance. drastically reducing plant downtime during Clean-In-Place (CIP) washing or routine maintenance shifts.
- ATEX Zone 20/21/22 Explosion Protection: Optional certified anti-static TPU formulation with surface resistance under "10^6 Ω", safely dissipating electrostatic charges generated during high-speed conveying of explosive combustible dusts (sugar, starch, flour, and lithium battery powders).
- High Tear Strength & Dynamic Flexibility: Formulated from high-density virgin polyurethane (PU/TPU), offering up to 600% elongation at break to absorb continuous multi-axis vibration on sifters, screeners, and active weighing hoppers.
![SF snap-in flexible connector structure diagram and standard dimensions table]()
Material Specifications & Sizing Matrix
| TECHNICAL PARAMETER | STANDARD PU | ULTRA-FLEX PU | STATIC-DISSIPATIVE PU | HIGH-TEMP PU |
|---|
| Material Formulation | Polyether TPU | Polyether TPU (thin wall) | Static-dissipative TPU | High-temperature PU |
| Wall Thickness | 1.0 mm | 0.5 mm | 1.0 mm | 1.0 mm |
| Surface Resistance | 10¹² Ω | 10¹² Ω | <10⁶ Ω | 10¹² Ω |
| Operating Temp Range | -30°C to +110°C (peak +120°C) | -30°C to +110°C (peak +120°C) | -30°C to +110°C (peak +120°C) | -20°C to +150°C |
| Tensile / Elongation | 40 MPa / 600% | 40 MPa / 600% | 15 MPa / 600% | 40 MPa / 600% |
| Standard Diameters (D) | DN102, DN152, DN204, DN254, DN304 up to DN804 (Custom sizes available) | | | |
| Standard Lengths (CL) | 100 mm, 150 mm, 200 mm, 300 mm, 500 mm up to 1000 mm (Min custom 80 mm) |
Hygiene Design for Food & Pharma Processing
The SF connector is designed for hygienic powder processing:
| HYGIENE FEATURE | ENGINEERING DETAIL |
|---|
| Crevice-free bore | Smooth internal surface reduces powder entrapment and cross-contamination between batches |
| Plasticizer-free formulation | No external plasticizers that could migrate into food or pharmaceutical powders |
| 85°C CIP cleanable | Withstands clean-in-place washing without removal from the line |
| FDA 21 CFR 177.2600 tested | TPU material passed total extractives testing for repeated food contact (Report Ref: TQT4821B36E)
|
Hygiene Benefits of Snap-In Powder Connectors
The snap-in powder connector delivers measurable hygiene advantages over clamped sleeves in food and pharmaceutical powder lines:
- Crevice-free bore prevents powder entrapment and cross-contamination between batches
- Plasticizer-free ether-based TPU limits additive migration into the product stream
- Tool-free removal allows operators to strip and clean the sleeve in seconds, eliminating dirty assembly points
- 85°C CIP cleanable without removing the connector from the line
- FDA 21 CFR 177.2600 extractives tested (Report Ref: TQT4821B36E)
These hygiene benefits make the SF snap-in connector the preferred choice for high-hygiene-standard powder handling lines where batch purity and cleanability are critical.
📐Need Custom Spigot Dimensions or **Industry** Cross-Reference Chart?
Download our complete official document: "SOSHH® SF Internal Snap-On Sleeves Engineering Catalog" to access full spigot groove matching tables and chemical resistance profiles.
Primary Applications & Industrial Equipment
![Food grade snap-on flexible PU connector installed on pharmaceutical powder filling machine]()
Typical Applications
Vibratory Sifter & Tumbler Screener Sleeves (Zero-dust transitions for high-frequency vibration equipment).
Bulk Bag & FIBC Filling/Emptying Stations (Handling hazardous or explosive powders safely).Weighing Hoppers & Load Cell Isolation (0.5mm high-flexibility sleeves with zero vertical force interference).Jacob Tubing Line Retrofits & Upgrades (Seamlessly compatible with existing industrial spigots).Quick-Connect Compatible: Superior durability, faster delivery.
Choosing the Right Connector Type
| REQUIREMENT | RECOMMENDED |
|---|
| Frequent CIP / quick removal | SF Snap-In |
| Sanitary clamp connection | TC Quick-Clamp |
| Bolted flange piping | FLC Round Flange |
| Square / rectangular equipment | FLR Square |
When to choose the SF: when the connection is opened daily for cleaning, when tool-free changeover reduces downtime, or when the line uses standard grooved spigots.
Snap-In Powder Connectors for Machinery Manufacturers
SOSHH supplies snap-in powder connectors directly to machinery manufacturers and OEMs building vibratory sifters, feeders, bag dump stations, and packaging lines. For OEM integration, SOSHH provides:
- Standard grooved-spigot compatibility for drop-in fit on existing machine designs
- Custom diameters (DN102–DN804) and lengths (80–1000 mm) to match machine-specific installation gaps
- Watermarked 2D outline drawings for immediate evaluation; full 3D CAD after a signed NNN agreement
- Sample connectors on freight-collect terms, with the sample fee credited against the first bulk order
Machinery manufacturers specify the SF snap-in connector to standardize one tool-free connection across their equipment range, reducing assembly time and field-service calls.
Quality Assurance & Safety Compliance
- Certified Food Contact Safety: Fully compliant with "FDA 21 CFR 177.2600" and "EC 1935/2004 & EU 10/2011" international food and pharmaceutical hygiene regulations.
- Third-Party Laboratory Verified: Tested and certified by "SGS, CNAS, ilac-MRA, and MA" accredited safety testing laboratories.
- Heavy-Duty Pressure & Vacuum Rating: Airtight sealed construction tested to withstand continuous pneumatic pressure surges and vacuum cycles without snap-ring pop-out.
Frequently Asked Questions
Q1: What is the SF Snap-In Flexible Connector?
A: The SF Snap-In Flexible Connector is a tool-free flexible sleeve that connects rigid process components — such as vibratory sifters, feeders, hoppers, and conveyors — in powder and bulk material handling. It snaps into standard grooved spigots without tools, clamps, or external hardware.
Q2: What material is the SF sleeve made from?
A: Ether-based TPU (thermoplastic polyurethane). The material passed FDA 21 CFR 177.2600 total extractives testing (Test Report Ref: TQT4821B36E).
Q3: What temperature range can the SF sleeve handle?
A: Continuous use from -30°C to +110°C, with a short-term peak of +120°C. The sleeve also supports 85°C CIP (clean-in-place) cleaning.
Q4: Is the SF Snap-In connector compatible with my existing spigots?
A: The SF series is designed to snap into standard quick-connect grooved spigots, allowing replacement of worn sleeves without changing existing steel pipework. For confirmation, provide your spigot’s groove diameter and depth to our engineering team.
Q5: How is the SF sleeve installed and removed?
A: The tool-free snap-in design allows installation and removal by hand during cleaning and maintenance, without disassembling the surrounding equipment.
Q6: Which sleeve thickness is recommended for weighing / load-cell applications?
A: For active weighing hoppers and load-cell systems, a thin, flexible PU sleeve is typically recommended to minimize parasitic force on the load cells. Contact our engineers for a thickness recommendation based on your specific weighing application.
Q7: Is the SF sleeve FDA approved?
A: No. The TPU material passed FDA 21 CFR 177.2600 total extractives testing. This is a material compliance test result, not a product certification, and it covers the tested sample and test conditions in Report Ref: TQT4821B36E.
Q8: What sizes are available?
A: Standard diameters range from DN102 up to DN804, with standard lengths from 100 mm up to 1000 mm (minimum custom length 80 mm). Custom sizes are available on request.
Q9: Can I get CAD files or a datasheet?
A: Yes. 2D outline drawings and datasheets are available for evaluation. 3D CAD files are provided after a signed NNN agreement.
Q10: How do I get a recommendation for my specific application?
A: Contact our engineering team with your equipment type, installation gap, temperature, powder type, and any cleaning requirements. We will recommend the appropriate connector type and material.
Q11:What makes the SF suitable for high hygiene applications?
The crevice-free bore reduces powder entrapment, the TPU is plasticizer-free to limit additive migration, the material passed FDA 21 CFR 177.2600 extractives testing, and the connector supports 85°C CIP without removal.
Q12:Is the SF suitable for pharmaceutical powder transfer?
The ether-based TPU passed FDA 21 CFR 177.2600 total extractives testing for repeated food contact. For pharmaceutical applications, provide your powder type and process conditions so our engineers can confirm suitability.
Why Partner with SOSHH® Industrial Engineering?
- 10+ Years Manufacturing Expertise: Over 1,000+ successful installations across food, pharmaceutical, and battery chemical industries.
- Fast Custom Prototyping: Custom diameter and non-standard length prototypes dispatched within 48 hours.
- On-Time Delivery Guarantee: Reliable global shipping ensuring 99% on-time project completion.
