Heavy-Duty SF Internal Snap-On Steel Spigot / Connector (2mm Wall)

Precision Fit: The End of Hose Clamps

The SOSHH SF Internal Snap-On Steel Spigot is the foundational component of our hygienic powder handling system. Uniquely shaped to enable flexible polyurethane (PU) connectors to snap-fit entirely inside the pipe, it eliminates the traditional, imprecise nature of external hose clamps.

By seating the flexible sleeve internally, the SOSHH spigot creates a perfectly flush, crevice-free internal transition. This prevents product build-up, cross-contamination, and abrasive wear, ensuring strict compliance with FDA food-grade and ATEX explosion-proof safety standards.

Installation Instructions: Permanent Spigot Welding Select the corresponding size of the steel spigot based on the outer diameter of your on-site equipment or piping, and proceed to weld both ends in sequence. Step 01: Measure Outer Diameter (OD) Accurately measure the exact outer diameter of your existing rigid pipe to select the matching SOSHH spigot size. Step 02: Align & Weld First Spigot Position the steel spigot coaxially over the pipe. Apply a full-perimeter TIG (Argon-arc) weld to ensure a secure, airtight seal. The 2mm wall thickness prevents burn-through. Step 03: Weld Opposing Spigot Align and weld the second spigot to the opposing pipe, paying close attention to the vertical alignment. Step 04: Verify Installation Gap (IG) Once welded, check that the correct Installation Gap is maintained between the two spigot heads. The system is now ready for the tool-free snap-in of the flexible PU sleeve.

Core Engineering Specifications

To meet the stringent demands of global procurement and plant design engineers, SOSHH spigots are manufactured to strict physical tolerances:

• Heavy-Duty 2.0mm Wall Thickness: Unlike standard 1.0mm or 1.5mm commercial stampings, our 2.0mm wall provides exceptional structural stiffness. It withstands continuous vacuum pressure, resists wear from abrasive powders (like lithium precursors or sugar), and ensures a stable, burn-through-free profile during on-site TIG welding.
• Hygienic Interior Finish: All internal surfaces are mechanically polished to <= 0.8Ra micro-metres (32Ra micro-inches), eliminating microscopic hiding places for bacteria and facilitating flawless Clean-In-Place (CIP) washdowns.
• Traceable Metallurgy: Precision-machined from premium AISI 304 Stainless Steel for general bulk solids, or AISI 316L Stainless Steel for highly corrosive chemical and pharmaceutical applications.

Spigot Anatomy & The "Installation Gap"

A correct installation is critical for maximizing the life of the flexible connector. The SOSHH spigot is engineered with two distinct zones:

• The Head (Locking Groove): The precision-rolled upper section where the PU sleeve’s snap-band locks into place.
• The Tail (Weldable Section): The straight lower section designed to be welded to your existing pipework. The tail can be easily cut down on-site to suit restricted spaces.
• Installation Gap (IG): The most important part of the welding process is ensuring the exact vertical distance between the top and bottom spigots. A correct Installation Gap ensures the PU sleeve maintains the perfect amount of slack to absorb severe vibrational displacement.

Installation Instructions: Tool-Free PU Sleeve Snap-In Once the steel spigots are welded in place, installing or replacing the flexible PU sleeve takes only seconds. No screwdrivers, wrenches, or external clamps are required. Step 01: Compress the Snap-Band Using your hands, simply push the integrated blue snap-band of the flexible PU sleeve inwards to compress it into a kidney or "heart" shape. Step 02: Seat the Lower Band Insert the compressed band into the lower welded steel spigot. Release your grip, allowing the band's elastic memory to snap it firmly into the internal locking groove. Step 03: Seat the Upper Band Repeat the exact same folding process for the top snap-band. Push it upward into the internal groove of the upper steel spigot and release. Step 04: Perfect Hygienic Seal The flexible sleeve is now fully installed. The outward radial tension of the snap-bands ensures a 100% dust-tight, flush, and crevice-free seal that resists high vibration and pressure.

Standard Size & Dimension Chart

• Wall Thickness (T): 2.0 mm
• Available Total Heights (h): 50 mm (Compact) / 90 mm (Extended - allows more room for tail cutting)
• Inner Diameter (d): Regulated precisely as D - 4mm.

(Note: Custom non-standard outer diameters, matching flanges, and free STEP/DXF 3D model verification are available upon request to assist your plant design team.)