Pu Steel Wire Hose with proper type selection and compliant installation will never collapse or be sucked flat under standard negative pressure working conditions for material suction. Stable anti-collapse performance under negative pressure is the core reason why it is adopted as a special hose for powder, particle and fluid suction. Different from ordinary non-skeleton PU hoses and plastic hoses, Pu Steel Wire Hose adopts a special spiral steel wire support structure to specifically solve the problem that the pipe wall is squeezed and deformed by atmospheric pressure during negative pressure material suction. It is widely used in suction machines, dust removal equipment, material transfer pumps and other negative pressure operation scenarios.
Its anti-collapse working principle is as follows. When the equipment sucks materials, negative pressure forms inside the pipe body, and external atmospheric pressure squeezes the pipe wall inward. The embedded high-strength galvanized steel wire or stainless steel wire skeleton of the hose is arranged in a uniform spiral shape to form an all-round rigid support structure. It firmly fixes the pipe diameter and offsets the extrusion force of external atmospheric pressure, keeping the pipe body round and unobstructed all the time. Collapse, shrinkage and deformation will not occur, ensuring uniform passage of materials and air flow, and eliminating blockage, poor material suction and equipment stalling caused by pipe collapse. Regular standard Pu Steel Wire Hose is marked with a rated negative pressure value before delivery. The support performance remains stable without abnormality when operating within the rated negative pressure range.
The collapse and suction flattening of the hose during suction in daily application are triggered by improper type selection, unsuitable working conditions, poor product quality and incorrect installation rather than inherent product defects. The first factor is mismatched specification selection. Small-diameter thin-wall hoses are suitable for low negative pressure working conditions. If they are forcibly used in high negative pressure material suction scenarios, the support force of steel wire cannot resist extrusion, leading to rapid collapse. The second factor is product quality problem. For inferior hoses with excessively wide steel wire spacing, uneven steel wire thickness and thin pipe wall thickness, insufficient density of skeleton support sharply reduces negative pressure resistance, and deformation and collapse easily occur even under standard negative pressure.
Abnormal working conditions also serve as major inducements. Blockage and material jamming in the suction pipeline will cause instantaneous overload of local negative pressure, far exceeding the rated bearing range of the hose. Instant high-pressure extrusion will lead to local collapse of the pipe body. Excessively adjusted negative pressure parameters of equipment beyond the matching threshold of the hose will also cause continuous suction flattening. Meanwhile, long-term use and aging of the hose, worn and thinned pipe wall, rusting and deformation of steel wire and excessive sharp bending of the pipeline will damage the overall structural stability, reduce the anti-negative pressure support capacity, and deformation and collapse easily emerge during material suction, affecting operation efficiency.
To completely avoid collapse during material suction, users shall select special Pu Steel Wire Hose with corresponding caliber, wall thickness and steel wire specifications according to equipment negative pressure, conveying distance and material characteristics, and prohibit overload application of small-specification hoses. Reduce sharp bending of pipelines during installation to guarantee smooth pipeline, and clean blocked sundries in pipelines regularly. Select high-quality products made of uniform steel wire arrangement and qualified wall thickness with virgin materials. Replace aged, deformed and damaged hoses in a timely manner. With standardized use, Pu Steel Wire Hose can keep the pipe unobstructed all the time without collapse and deformation, and ensure stable operation of negative pressure material suction work.