Factory Direct Polyurethane PU Air Tube Pneumatic Hose Tubing Manufacturer 6x4 8x5 10x6.5 12x8 Blue Black Red Wholesale Price

Product Detailed Description:

The PU tube is a polyurethane pneumatic hose with a smooth-bore design and high flexibility. Engineered as a direct replacement for brand-name polyurethane tubing, it delivers identical performance and push-in fitting compatibility at significantly lower cost. Lightweight, kink-resistant and abrasion-resistant, it reliably connects push-in fittings, cylinders and valves from -20 °C to 60 °C.

Application Industries

• Pneumatic transmission lines — the standard tubing between valves, cylinders and fittings
• Automation assembly lines — air supply for cylinders, grippers and sensors
• Packaging machinery — tubing for sealing, labeling and conveying units
• Textile machinery — air circuits for tensioning and cutting units
• Semiconductor & electronics equipment — clean, lightweight air lines
• Food & beverage processing — non-toxic tubing for control air
• Robotics & grippers — flexible air lines for moving joints
• Vehicle & special machinery — air lines on buses, trucks and workshop equipment
• Laboratory & medical equipment — small-bore air transmission
• General factory air — quick, neat point-to-point connections in any plant

Technical Specification

Customization Options

Product Advantages

• High flexibility — easy to route in tight spaces; good bending radius without kinking.
• Lightweight — reduces load on fittings and moving parts.
• Abrasion & tear resistant — ester grade for high-wear applications; long service life.
• Smooth inner bore — low pressure loss, high flow rate.
• Wide size range — O.D. Ø4 / 6 / 8 / 10 / 12 / 14 / 16 mm with matching wall thicknesses.
• Working pressure up to 1.0 MPa (size-dependent; reference values by size in the selection guide).
• Wide temperature range — -20 °C to 60 °C continuous service.
• 6+ colors — blue, black, red, yellow, green, white and transparent for circuit identification.
• Push-in fitting compatible — works with all standard metric push-in fittings (SMC, Festo, PISCO, Airtac).
• Factory direct — rolls, cut-to-length, custom colors and printing; low MOQ.

Installation and Usage：

Installation

• Cut the tube square — use a tube cutter (not scissors or a knife); a square, burr-free end ensures a full seal in push-in fittings.
• Insert into the fitting — push the tube firmly and straight into the push-in fitting until it bottoms out; you will feel or hear it lock. Give a light pull to confirm.
• Route with adequate bending radius — avoid sharp bends at the fitting; keep the bending radius at least 5× the tube O.D. to prevent stress at the joint.
• Secure long runs — support long tube runs with clamps or cable ties to avoid pulling force on fittings.

Usage Precautions

• Use within the rated working pressure and -20 °C to 60 °C temperature range.
• Do not step on, crush or drag the tube across sharp edges; protect from weld sparks and hot surfaces.
• Do not bend the tube sharply at the same point repeatedly — this can cause kinking and fatigue.
• Keep the tube away from oil and solvents that may attack polyurethane (check compatibility for your medium).
• On moving parts, leave enough slack and use a spiral hose guard if needed.

Maintenance

• Check periodically: tube fully inserted in fittings, no cracks, no leakage (soapy water test).
• If the tube becomes loose in the fitting, cut a fresh square end and reinsert.
• Replace the tube if it is kinked, flattened or cracked — do not patch.
• Store spare rolls away from direct sunlight and ozone sources to prevent aging.

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