Kaiyue Rubber (Jingxian): Delivering High-Quality Rubber & Silicone Products for Industrial & Daily Applications Worldwide.
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Our SAE 100 R4 hydraulic hose is meticulously manufactured to meet and exceed SAE J517 specifications, ensuring reliable fluid dynamics across complex circuits. Unlike standard textile-braided alternatives that can easily flatten or deform under negative pressure, this specialized suction hose incorporates a rigid helical steel wire. This structural reinforcement provides exceptional anti-vacuum performance, allowing the hose to withstand up to 28 inHg of vacuum without collapsing. This makes it an indispensable component for pump inlets and low-pressure return lines where maintaining a consistent, unrestricted flow is critical to system health.
The foundation of this hose lies in its premium NBR (Nitrile Butadiene Rubber) inner tube. This densely compounded, smooth interior layer is specifically formulated to resist degradation from a wide spectrum of media. It offers broad compatibility with petroleum-based hydraulic oils, mineral oils, diesel, kerosene, water-glycol fluids, and even compressed air. By preventing the inner wall from swelling, softening, or flaking off into the fluid stream, it protects sensitive downstream valves and pumps from contamination, effectively extending the operational life of your entire hydraulic circuit.
Beyond the inner core, the hose features a robust middle reinforcement layer consisting of high-strength synthetic textile braids intertwined with a resilient helical steel wire. This dual-material architecture allows the hose to comfortably support working pressures ranging from 0.8 to 3.4 MPa depending on the diameter. Furthermore, it boasts a burst pressure that exceeds four times the standard working pressure, delivering a substantial safety margin. This means operators can rely on the hose to maintain its structural integrity even when subjected to sudden fluid surges or heavy-duty industrial vibrations.
Running your hands along the outer cover, you will feel a tough, abrasion-resistant synthetic rubber designed to endure harsh external environments. This outer layer acts as a formidable shield against ozone exposure, UV radiation, and severe weathering. It remains structurally stable and flexible across an extreme temperature range of -40°C to +100°C, with the ability to handle intermittent spikes up to 120°C. Whether exposed to freezing winter conditions or the intense heat of an engine bay, the hose resists surface hardening and micro-cracking, ensuring long-term reliability outdoors.
Produced in a facility with extensive manufacturing capacity and decades of fluid conveyance expertise, every batch of our SAE 100 R4 hose undergoes rigorous quality control. Our testing protocols include dynamic pulse testing, severe abrasion evaluations, and low-temperature bending assessments to guarantee field readiness. Jingxian Kaiyue Rubber Products Co., Ltd. provides comprehensive customization options, allowing buyers to specify exact inner diameters, outer diameters, lengths, and compatible end fittings to perfectly match unique equipment specifications and project demands.
Accurate dimensional and pressure ratings are vital for safe system integration. The table below details the exact specifications for our SAE 100 R4 line. Notably, the engineered helical wire construction grants these hoses an exceptionally tight minimum bending radius—for instance, just 125 mm for the 3/4" size. This superior flexibility allows mechanics and engineers to route the suction lines through confined engine compartments and complex industrial machinery frameworks without risking kinking or restricting fluid flow.
Nominal Size | Inside Diameter (ID) | Outside Diameter (OD) | Min. Bending Radius | Working Pressure |
3/4"（DN19） | 19 mm | 29 mm | 125 mm | 2.0 MPa (20 bar) |
1"（DN25） | 25 mm | 36 mm | 150 mm | 1.7 MPa (17 bar) |
1-1/4"（DN32） | 32 mm | 44 mm | 180 mm | 1.4 MPa (14 bar) |
1-1/2"（DN38） | 38 mm | 51 mm | 220 mm | 1.0 MPa (10 bar) |
2"（DN51） | 51 mm | 65 mm | 280 mm | 0.8 MPa (8 bar) |
In the demanding environment of earthmoving and construction, excavators, loaders, bulldozers, and rollers require continuous fluid power. Our SAE 100 R4 hydraulic suction and return hose excels in these applications by absorbing intense machine vibrations while stably transferring low-pressure fluid. Its vacuum resistance ensures that the main hydraulic pumps never experience cavitation, providing reliable oil suction even during aggressive, continuous operation.
Stationary industrial environments, such as factory floors utilizing large hydraulic power units, CNC machine tools, and injection molding machines, depend on steady fluid circulation. This hose serves as a critical conduit for these automated systems. The oil-resistant NBR core prevents internal degradation, while the anti-collapse structure guarantees that fluid reserves are drawn smoothly from the reservoir into the production line, minimizing downtime and maintenance costs.
Agricultural operations subject equipment to constant outdoor exposure, UV rays, and abrasive dust. Suitable for tractors, combine harvesters, and specialized farming hydraulic systems, this hose maintains its flexibility and structural integrity in open-air environments. It withstands the daily rigors of field vibrations and drastic weather shifts, supporting the long-term, uninterrupted operation of vital farming implements during critical planting and harvesting seasons.
Deep underground or in open-pit mines, conveying equipment and extraction machinery face extreme physical abuse. Applied in these punishing sectors, our hose features a highly durable outer cover that resists impact and abrasion from loose rocks and debris. More importantly, its strong negative pressure resistance effectively avoids tube collapse during heavy oil suction, providing safe and stable fluid transmission in the most unforgiving mining conditions.
Commercial transport and utility vehicles, including heavy-duty trucks, mobile cranes, and municipal service vehicles, require flexible yet durable fluid lines. This hydraulic hose fits perfectly into the return and suction circuits of mobile hydraulic systems. It effortlessly adapts to chassis vibration, sharp routing angles, and the fluctuating temperature zones between the engine compartment and external hydraulic rams during vehicle transit and operation.
To maximize the service life and performance of your SAE 100 R4 hydraulic hose, please adhere to the following operational and installation guidelines:
Pre-Installation Inspection: Before mounting, thoroughly check the hose exterior for any signs of transit damage and verify that the inner diameter precisely matches your system's fittings to prevent pressure drops.
Proper Routing: Utilize the hose's tight bending radius capabilities, but strictly avoid exceeding the minimum bend radius (e.g., 125mm for the 3/4" size). Install the hose without twisting its body, as torsional stress can weaken the internal steel wire reinforcement.
Environmental Shielding: Route the assembly away from sharp metal edges, moving mechanical parts, and direct high-temperature exhaust sources to protect the synthetic rubber cover from premature wear.
Secure Connections: Tighten all clamps and fittings to the manufacturer's specified torque. Over-tightening can crush the hose end, while under-tightening will lead to fluid leakage and loss of vacuum.
Routine Maintenance: Establish a regular inspection schedule. Check the outer cover for signs of hardening, micro-cracks, or severe abrasion, ensuring the continuous, safe operation of your complete hydraulic circuit.
Yes, it is purposefully engineered for this application. Our SAE 100 R4 hose features a specialized helical steel wire embedded within the textile braid. This rigid structure supports up to 28 inHg of vacuum, actively preventing the tube from collapsing inward under negative pressure. It is widely and successfully used for oil suction and return circuits across various heavy industries.
The hose operates with complete stability in ambient and fluid temperatures ranging from -40°C to +100°C. For brief, intermittent periods, it can withstand temperatures up to 120°C. The premium synthetic rubber formulation ensures the hose retains excellent flexibility in freezing conditions while resisting thermal aging and hardening in high-temperature environments.
Yes, Jingxian Kaiyue Rubber Products Co., Ltd. fully supports custom manufacturing. Backed by our robust factory capacity, we can tailor the inside diameter (ID), outside diameter (OD), and overall length of the SAE 100 R4 hose to your exact specifications. We also supply perfectly matched fittings to streamline installation for our global clientele.
Absolutely. The inner tube is constructed from high-grade NBR (Nitrile Butadiene Rubber), which is renowned for its exceptional oil resistance. It safely and efficiently conveys petroleum-based hydraulic oils, lubricating oils, mineral oils, diesel, and water-glycol fluids without experiencing internal swelling, degradation, or damage over time.
