![SOSHH snap-in clear TPU collection blanking sock installed on vibratory sifter oversize discharge port]()
Technical Image Caption: Transparent 1.0mm ether-TPU collection sock with integrated snap-in cuff mounted directly to a stainless steel spigot, providing full visual monitoring and tool-free disposal of sifter oversize debris.
Engineered for Sifter Rejects and Sanitary Pipeline Blinding
When circular or rectangular vibratory sifters discharge oversize materials, maintaining containment is essential. Standard collection bags secured by hose clamps pinch into folds, creating powder accumulation pockets and leaking airborne dust during continuous vibration.
SOSHH clear blanking socks are thermally welded with a reinforced flat or radiused bottom base. The smooth cylindrical wall ensures gravity drop without material bridging, while the snap-fit top band maintains an airtight seal against oscillating vibration. Operators can inspect debris accumulation in real time and snap the bin off for cleaning or disposal in seconds.
Key Engineering Advantages
Full Optical Transparency for Real-Time Monitoring
Formulated from virgin polyether TPU that resists yellowing and clouding, allowing operators to visually track fill capacity and detect screen breakage immediately.
Tool-Free 30-Second Snap Installation
No screw clamps, screwdrivers, or loose fasteners. The polymer snap band compresses by hand and snaps securely into the spigot groove, eliminating drop-off risks under severe shaker vibration.
Dust-Tight and Liquid-Tight Sealing
High-frequency weld seams provide dust-tight containment during powder processing and liquid-tight sealing during washdown isolation, when correctly installed on a compatible spigot.
Crevice-Free Internal Sanitary Profile
Eliminates dead zones, internal ledges, and thread crevices, preventing bacterial growth and allergen cross-contamination in food and pharmaceutical plants.
Regulatory Food Contact Compliance
Manufactured from virgin polyether TPU. Material compliance: complies with FDA 21 CFR 177.2600 (Report Ref. TQT4821B36E); formulated in accordance with Regulation (EU) No 10/2011 and Regulation (EC) No 1935/2004 (Declaration of Compliance available).
Anti-Static PU Option (PU-10-AS)
For combustible-dust or static-sensitive applications, SOSHH offers a static-dissipative PU-10-AS construction with a surface resistivity of 10⁶–10⁹ Ω/sq (IEC 60079-32-2 test method). The final installation must include an appropriate grounding path; complete-assembly suitability must be evaluated against the site hazardous-area classification.
Material Grade Selection
| REQUIREMENT | SOSHH GRADE |
|---|
| Standard clear collection | PU-10, 1.0 mm |
| Abrasive material | PU-15, 1.5 mm (39.0 mg DIN abrasion) |
| Combustible dust / static control | PU-10-AS (10⁶–10⁹ Ω/sq) |
| Deep vacuum | PU-10-VR / engineering review |
| Elevated temperature | PU-HT / engineering review |
Standard Size and Dimension Specifications
(Material: 1.0 mm Clear Polyether TPU (PU-10) or 1.5 mm Abrasion-Resistant TPU (PU-15) | Base: Fully Welded Sealed Bottom | Temp Range: −30 to +85 °C continuous, +110 °C peak, CIP 85 °C)
| NOMINAL SIZE (COMMON SEARCH) | ACTUAL SPIGOT OD (ORDER THIS) | INCH |
|---|
| 100 mm | 102 mm | 4" |
| 150 mm | 152 mm | 6" |
| 155 mm | 159 mm | 6¼" |
| 200 mm | 204 mm | 8" |
| 215 mm | 219 mm | 8½" |
| 250 mm | 254 mm | 10" |
| 269 mm | 273 mm | 10¾" |
| 300 mm | 304 mm | 12" |
| 321 mm | 325 mm | 12¾" |
| 350 mm | 354 mm | 14" |
| 373 mm | 377 mm | 15" |
| 400 mm | 404 mm | 16" |
| 450 mm | 454 mm | 18" |
| 500 mm | 504 mm | 20" |
| 550 mm | 554 mm | 22" |
| 600 mm | 604 mm | 24" |
| 650 mm | 654 mm | 26" |
| 700 mm | 704 mm | 28" |
| 750 mm | 754 mm | 30" |
| 800 mm | 804 mm | 32" |
Standard Collection Lengths (L): 100 / 150 / 200 / 250 / 300 / 350 / 400 / 450 / 500 / 550 / 600 / 650 / 700 / 750 / 800 / 850 / 900 / 950 / 1000 mm (19 lengths). The platform provides 20 × 19 = 380 standard diameter × length combinations.
Key size mapping: 250 mm = Ø254 mm · 350 mm = Ø354 mm · 600 mm = Ø604 mm. The blanking sock must match the spigot OD, not the pipe bore. Confirm the measured spigot OD before ordering.
Common Size Reference — 250 mm and 350 mm
Do you need a 250 mm or 350 mm blanking sock? On the SOSHH standard snap-in platform, the corresponding engineering references are Ø254 mm and Ø354 mm. Because nominal equipment dimensions, sleeve bore and spigot seating dimensions may differ, confirm the actual spigot OD and groove profile before ordering. Custom lengths such as 150 mm, 350 mm and 600 mm are manufactured to the required collection volume.
Custom Blanking Sock Manufacturing
SOSHH manufactures custom PU-10 blanking socks from flat TPU sheet using CNC cutting and HF welding — no injection-mold tooling. Custom options: non-standard diameter and length, extra-short or extended body, flat or radiused welded bottom, bottom reinforcement, pull handles, anti-static TPU, abrasion-resistant TPU, vacuum-reinforced designs, round-to-square transitions, and stainless-steel support rings (by engineering review). Tolerances to ISO 2768-m.
Target Industrial Applications
- Vibratory Sifter & Screener Oversize Collection: Captures rejected particles, agglomerates, and fibers discharged from vibrating screens.
- CIP Washdown Blind Plugs: Snaps into open pipeline ends during Clean-in-Place cycles to isolate wash water without bolting blind flanges.
- Metal Detector Rejection Bins: Mounts on secondary reject diverters to isolate contaminated powder batches for QA testing.
- Rotary Valve & Feeder Sight Windows: Installed below discharge spigots as temporary inspection chambers to check material color and flow characteristics.
Related Procurement RFQs and Technical FAQs
- What is a blanking sock? — A transparent, flexible collection sleeve fitted to a sifter or screener discharge spigot to capture oversize, reject or sampled material.
- What is a blanking bin used for? — Primarily sifter oversize collection; also reject capture, sampling and temporary inspection.
- What is the difference between a blanking cap and a blanking sock? — A blanking cap is a shallow closure used to seal an open spigot, prevent contamination during cleaning or changeover, or act as a small inspection window. A blanking sock / bin is a deeper collection component used to capture oversize, reject, sample or discharged material from a process outlet. If you need a shallow closure, choose a cap; if you need a transparent collection volume, choose a sock.
- Can you make a 250 mm blanking sock? — Yes, our Ø254 mm reference matches a nominal 250 mm bore.
- Can you make a 350 mm blanking sock? — Yes, our Ø354 mm reference matches a nominal 350 mm bore.
- What standard diameters are available? — Ø102–804 mm (20 references).
- What standard lengths are available? — 100–1000 mm in 50 mm increments (19 references).
- Can diameter and length be customized? — Yes, tool-free from your spigot OD or drawing.
- Can a stainless-steel support ring be added? — Yes, by engineering review for larger diameters or high vibration.
- Is PU-10 suitable for food contact? — Material complies with FDA 21 CFR 177.2600 (Report TQT4821B36E); EU 10/2011 & EC 1935/2004 (DoC available).
- Is an anti-static / ATEX-compatible material available? — Yes, PU-10-AS, 10⁶–10⁹ Ω/sq (IEC 60079-32-2 method).
- Can you provide 2D drawings and custom OEM dimensions? — Yes, watermarked 2D PDF for unpaid inquiries; 3D CAD after signed NNN.
Hydrolytic Stability
Ether-based TPU provides hydrolytic resistance and resists microbial attack, making it suitable for wet cleaning, high-humidity food manufacturing, and alcohol-based cleanroom sanitizers without cracking or turning brittle.
