Custom virgin PTFE convoluted bellows hose with 360° loose flanges. Zero-stiffness design eliminates parasitic piping stress on load cells to guarantee 100% weighing accuracy. FDA & CIP ready.





The Soshh Ultra Flex Pure PTFE Bellows (Series UB-2026) is a specialized zero-stiffness PTFE convoluted hose expansion joint engineered specifically for high-precision load cell weighing systems, gravimetric loss-in-weight feeders, and ultra-pure chemical processing lines.
By utilizing a 100% virgin solid-molded PTFE core without heavy metal braiding or rigid plastic liners, this highly flexible loose flange PTFE connector eliminates mechanical piping stress, thermal expansion forces, and machinery vibration—ensuring your sensitive weighing instruments achieve 100% measurement accuracy with zero calibration drift.
In modern automated processing plants, rigid piping connections and stiff braided hoses transfer parasitic forces directly to load cells and weighing hoppers. As process temperatures fluctuate, thermal expansion creates mechanical torque that distorts load cell readings.
How Soshh Ultra Flex Solves This:
For instrument engineers, HSE managers, and procurement officers evaluating Total Cost of Ownership (TCO):
| Engineering Parameter | Technical Specification | Compliance & Industry Standards |
| Product Category | Pure PTFE Convoluted Bellows Hose | Zero-Stiffness Flexible Expansion Joint |
| Core Tube Material | 100% Virgin Molded PTFE / FEP / PFA | FDA 21 CFR 177.1550 & USP Class VI |
| Flange Type & Material | 360° Loose Lap-Joint Flanges (SUS304 / SUS316L / CS) | ASME B16.5 Class 150, DIN PN10/PN16, JIS 10K |
| Pressure & Vacuum Limits | Full Vacuum (-100 kPa) to +2.0 bar positive pressure | Vacuum support rings available for high suction |
| Operating Temperature | -70°C to +260°C (-94°F to +500°F) | Thermal shock & severe chemical resistant |
| Static Protection (Optional) | Embedded copper wire / SS braid grounding lugs | ATEX rated for explosive dust & gas zones |
| Size Range Availability | DN15 (1/2") up to DN300 (12") nominal bore | Custom length & large-diameter CNC machining |
📥 Need 2D CAD Drawings & Custom RFQ Worksheets?Download our comprehensive PTFE Convoluted Hose & Loose Flange Specification Sheet (PDF) to view dimensional PCD tables, pressure ratings, and ordering templates.
Every processing line faces unique spatial and thermal challenges. Soshh provides fully customized engineering support, allowing you to define the exact Face-to-Face length (L), Bore Inner Diameter (ID), and Flange PCD Bolt Hole Layout required for your plant retrofit or new OEM equipment integration.
FDA & USP Class VI compliant pure PTFE flexible hose with 360° rotatable ASME lap joint flanges. Zero metal ion contamination, -0.4 bar anti-vacuum helical wire, and zero-torque load cell isolation for battery electrolytes and gravimetric feeders.
Premium solid virgin PTFE corrugated bellows turned via high-precision CNC. Thick-walled trapezoidal design engineered for extreme high-pressure surges (up to 1.6 MPa) and absolute high vacuum loops. Available with custom-welded stainless steel limit tie-rods to fully absorb pipeline blind flange forces, or as basic flexible displacement models. Ideal for lithium battery materials (copper/iron contamination-free), semiconductor ultra-pure fluids, and glass-lined reactors. Non-standard engineering customizes large-bore sizes up to a maximum diameter of DN1200. Request 2D/3D CAD submittals at amin@soshh.com.