Accessories for tubes and hoses by Parker Legris

Parker Legris Accessories for Tubes and Hoses — Precise Selection, Reliable Assembly

The Parker Legris accessory program for tubes and hoses covers the requirements of industrial pneumatics, fluid technology, and machine-side cabling. The focus is on components that ensure installation, protection, and long-term function: support sleeves to prevent kinking in soft hoses, push-in fittings with integrated anti-kink springs, tube and hose cutters for clean cuts, strippers and hose clamps for precise handling, as well as clip rails and screw clamps for fastening. All components are designed not to impair material properties such as elasticity, temperature resistance, and chemical resistance.

Materials and Material Selection

Parker Legris accessories deliberately use plastics and metals, matched to operating temperature, media, and mechanical stress. Polyethylene (PE) and Polyamide (PA) are frequently used for clips, support sleeves, and clip rails, as they offer good abrasion resistance and temperature ranges up to approximately 80 °C. For high thermal stress or contact with oil/chemical media, fluorinated plastics (FPM, PTFE-coated) or high-temperature resistant polyamides are available. Metallic components such as AISI 316 stainless steel or galvanized steel are used for screw clamps and hose connections when corrosion resistance and shear strength are required.

Shapes, Dimensions, and Standards

Parker Legris accessories cover standard diameters from 2 mm to over 50 mm. Support sleeves and anti-kink inserts are available in differentiated lengths and wall thicknesses to achieve the necessary bend radius reduction for flexible hoses. Push-in fittings comply with common standards for pneumatic connections (ISO, DIN-EN) and are compatible with PE, PU, and PTFE hoses. Screw clamps conform to common screw systems (hose clamp systems according to DIN 3017/3019) and offer defined tightening torques to prevent hose damage.

Connections and Sealing Systems

Connection concepts range from simple hose nozzles to conical screw-in connections and push-in quick couplings with O-ring seals. For push-in fittings, a two-stage seal made of EPDM or NBR guarantees long-term media resistance for compressed air, water, and neutral hydraulic oils. Stainless steel clamps optionally use a thin EPDM backing for pressure distribution. For special media, FKM O-rings are provided. The selection of sealing materials suitable for the temperature and chemical resistance of the process medium is important.

Assembly Practice and Tools

Parker Legris tools are designed for precise, reproducible cuts and stripping. Tube cutters with hardened blades provide burr-free cuts in hard plastics; subsequent deburring prevents abrasion at the connection. Strippers operate at a defined pull-off speed to avoid damaging inner layers of multi-hose assemblies. Hose clamps with padded jaws protect surface coatings and reduce pinch points. When assembling clip rails, mounting rails with guide grooves are recommended to maintain spacing and grid dimensions. Torque specifications for screw clamps ensure tightness without crushing.

Practical Examples — Structured Applications

Example 1: Pneumatic Control System in Assembly Cells In an automated assembly cell, numerous 6x4 mm PU hoses are routed. To prevent kinking, polyamide support sleeves are used at changes of direction to define the bend radius. Push-in fittings with EPDM O-rings and integrated anti-kink springs secure the connection at the valve block. Clip rails with a 10 mm grid fix the cable paths to profile rails. Tube cutters provide clean ends, strippers remove inner coatings before insertion. Result: constant switching times, reduced leakage rate. Example 2: Cooling Water Circuit in Machine Tools For cooling water lines, PVC hoses with a 12 mm inner diameter are used. Since the medium is slightly siliceous, stainless steel screw clamps with EPDM backing are employed to reduce corrosion and microbial growth. T-pieces and push-in fittings made of chloride-resistant plastic ensure low dead spaces. During assembly, a special deburring function on the tube cutter is used to minimize particle release. Result: constant flow rates and longer filter service life. Example 3: Laboratory Setup with Corrosive Media In laboratory setups with aggressive solvents, PTFE-coated hoses are used. PTFE support sleeves prevent kinks in tight routing paths. Conical screw connections with FKM seals are used on the connection side. Clip rails made of acid-resistant material secure the cable routing. Tube cutters with special blades for PTFE ensure clean cuts, as fraying would lead to leaks. Result: safe, chemical-resistant cable routing without contamination.

Product Categories at a Glance

* Support sleeves, anti-kink springs, push-in fittings, tube and hose cutters, strippers, hose clamps, clip rails, screw clamps

Compatibility and Stock Levels

When selecting, the compatibility of hose material, connection diameter, and fitting type must be checked. Parker Legris offers standardized codes and markings that reduce assembly errors. Spare parts and wear parts such as seals and clamps are typically kept in stock; for special materials, longer delivery times exist. For critical applications, plan service kits with O-rings and sealing washers to minimize downtime.

Maintenance and Service Life

Regular visual inspection for abrasion, pinch points, and corrosion extends service life. Leakage tests after initial assembly and after service intervals of 6–12 months are standard in many applications. Proactively replace seals at the first sign of hardening or cracks. For flexible hoses, a four-fold check (cut edge, insertion depth, clamp position, bend radius) reduces failure rates.

Leakage and Safety Control

For pressure-bearing systems, a static leakage test with a defined test medium and test pressure is recommended, followed by a leak rate determination. Quick-release couplings and push-in fittings must be assembled according to the manufacturer's instructions until an audible or palpable click is reached. Document assembly processes and operating instructions to enable personnel changes without loss of quality. Further technical information on selection and application can be found on our technical page: https://maku-industrie.de/technik. For specific application examples and reference setups, visit the application examples: https://maku-industrie.de/anwendungsbeispiele.

FAQs

1. Which support sleeve fits my PU hose?

Choose a support sleeve whose inner diameter is 0–0.2 mm smaller than the outer diameter of the hose to ensure a secure fit without crushing. Pay attention to the hose manufacturer's recommended bend radii; shorter sleeves are suitable for tight radii, longer sleeves distribute bending stress.

2. Which sealing material is suitable for compressed air and which for aggressive media?

For compressed air, EPDM or NBR are standardly suitable. For organic solvents or high temperatures, FKM or PTFE-coated seals are preferable. Check the chemical resistance table in the product documentation before use.

3. How do I prevent leaks in push-in fittings?

Ensure that the hose end is burr-free and straight, the insertion depth is maintained according to the marking, and the O-ring seal is undamaged. For flexible hoses, use anti-kink springs and fix lines with clip rails to reduce dynamic loads.