Industrial grade 4SH spiral hoses and SAE standard hydraulic rubber tubing
The 4SH 3/4" Hydraulic Rubber Hose, governed by the EN 856 standard, represents the pinnacle of high-pressure spiral hose technology. In the current global industrial landscape, the demand for these "four-layer steel wire spiral" hoses is skyrocketing due to the intensification of heavy-duty machinery operations. From the shale gas fields of North America to the massive open-pit mines of Australia, the 3/4 inch (DN19) size serves as the "artery" for hydraulic systems that require both high flow rates and extreme pressure resistance (typically up to 420 bar or 6090 psi).
Industry trends are shifting toward "Embossed Marking" rather than traditional inkjet printing. Embossed branding ensures that technical specifications, safety data, and manufacturer traceability remain legible even after years of exposure to abrasive grit, UV radiation, and hydraulic oil leaks. This transition reflects a global push for enhanced safety protocols and long-term maintenance reliability in industries like tunneling (TBM), offshore drilling, and large-scale agricultural automation.
Global buyers are moving away from purely "cheap" options toward "Total Cost of Ownership" (TCO) models, favoring durable Chinese-manufactured hoses with IRIS certification.
The 4SH spiral structure provides superior impulse resistance compared to braided hoses, making it indispensable for hydraulic hammers and heavy excavators.
Embossed hose surfaces provide permanent identification, meeting the strict regulatory requirements of the EU and North American mining safety boards.
Shaanxi Kelong New Materials Technology Co., Ltd. was founded in 1996, growing from the Xianyang Kelong Rubber Products Institute. We are a technological innovation powerhouse integrating R&D, production, and sales.
Our focus lies in hydraulic seal sets, high-pressure hoses, and coal mine auxiliary equipment. With high-quality products trusted globally, we serve industries ranging from Civil Aviation and High-speed Railway to Wind Power and Engineering Machinery.
Imported technology and rigorous quality control systems
Our hydraulic hose production base adopts a complete set of equipment imported from Italy, ensuring precision winding and vulcanization.
Our sealing products utilize equipment and production technology from DMH Company in Austria, the gold standard in polymer processing.
ISO and IRIS certified. R&D investment accounts for 7%+ of income, keeping our technology at the industry's forefront.
Proving reliability in the world's most demanding environments
Ultra-tough 4SH hoses for rock-solid underground performance.
High-pressure hoses staying stable under extreme load lifting.
Combining flexibility and strength for salt-mist environments.
Efficiency-upgrading hydraulic lines for pitch and yaw control.
As a leading China Factory, Shaanxi Kelong offers competitive 4SH 3/4" hydraulic rubber hose pricelists without compromising on international standards. Our local application scenarios include the deep coal mines of Shaanxi and the high-speed rail projects connecting Asian hubs. We understand that global companies need more than just a supplier; they need a partner who can provide technical services, repair expertise, and technological innovation. Our 180+ engineers are dedicated to ensuring that every foot of embossed hose meets the "Kelong Standard" of excellence.
Browse our extended range of spiral and braided hydraulic hoses
Kelong New Materials
