CR Outside Braided Hose

BESTYIELD Technology (Huizhou) Co., Ltd. is one of the leading manufacturers and suppliers of cr outside braided hose in China, also supports customized service. Welcome to wholesale bulk cr outside braided hose in stock here and get pricelist from our factory. For price consultation, contact us.

The CR 803 series is designed around a high-pressure dual-layer reinforcement architecture, delivering superior burst strength and pressure cycling endurance for the most demanding industrial fluid transfer applications. Key features include:

• Tube: Black CR (Chloroprene Rubber) - inherent flame retardancy and broad chemical compatibility for industrial service
• Inside braid: Polyester fiber, Aramid fiber, Copper-plated steel wire - primary pressure containment layer with multiple reinforcement options
• Cover: CR; smooth finish - continuous protective barrier against environmental and chemical exposure
• Color: Black or multiple colors - identification coding options for complex fluid systems
• Outside braid: Polyester or stainless steel - secondary reinforcement layer providing additional burst strength and abrasion protection
• Temperature range: -40°C to +140°C - wide thermal capability for diverse operating environments
• Compliance standards: RoHS, REACH - full European regulatory compliance
• Flame resistance rating: HB, V1, V2, V0, VW-1, EN45545 - from basic self-extinguishing to railway fire safety standards

The 803 series represents the high-pressure tier of our CR hose platform, engineered for demanding industrial fluid transfer at working pressures up to 2.0 MPa. The key differentiator lies in its multi-layer construction: the CR tube is extruded with a controlled surface texture that maximizes interlayer adhesion with the braided reinforcement. Aramid fiber or copper-plated steel wire is helically wound at an optimized 55° angle, balancing burst strength with flexibility.

The outer CR cover is applied under tension to eliminate air pockets, then cured in vulcanization line to achieve uniform cross-link density. This manufacturing precision results in a hose that withstands repeated pressure surges without delamination - a common failure mode in lower-quality braided hoses. The stainless steel outside braid option (available for sizes 1/2" and above) adds abrasion protection for drag-service applications.

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Rail transit systems rely on the 803 series for brake air supply lines, pantograph pneumatic controls, and underfloor cooling circuits that must endure vibration, thermal cycling, and exposure to track-side contaminants. In marine applications, these hoses serve engine room cooling water circuits and deck wash-down systems where saltwater resistance and EN45545 flame certification are mandatory. Heavy machinery manufacturers specify the 803 series for hydraulic pilot lines, concrete pump circuits, and crane outrigger cylinders - environments where pressure spikes of 2× working pressure occur regularly during operation.

In the rail sector specifically, the 803 series meets EN45545-2 hazard level HL2 and HL3 requirements for railway vehicle fire protection, making it approved for use in passenger compartments and underfloor equipment bays. Shipbuilders value the CR compound's resistance to saltwater immersion and marine-grade anti-fouling paint splashes. Mining equipment OEMs select the stainless steel outside braid variant for underground hydraulic systems where rock abrasion would destroy unprotected rubber covers within weeks.

• Remarks: Inner and outer diameter sizes are customizable.

The 803 series is manufactured through a carefully controlled multi-stage process. CR compound mixing begins in a Banbury internal mixer at an initial temperature of 45°C, with stearic acid added first as processing aids to ensure scorch safety during subsequent high-shear mixing. The compounded CR is then cooled and stored under controlled humidity conditions prior to tube extrusion.

Tube extrusion employs a cold-feed extruder equipped with a precision ground die, achieving wall thickness tolerances of 0.20-1.00mm. The extruded tube passes through a laser micrometer for real-time diameter monitoring before entering the braiding station. Braid winding is performed on high-speed braiders with constant tension control (±2N), ensuring uniform fiber coverage and consistent braid angle throughout the hose length.

Cover extrusion and curing process achieves complete cross-linking of the CR cover. Braiding is carried out after hose vulcanization. Finished hose is cooled, coiled, and packaged in moisture-barrier film for shipment.

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