T: +86-19511798062
E: sales@honestflex.com
E: sales@honestflex.com
Licang District, Qingdao, Shandong, China
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The Honestflex SAE 100 R4 is a low-pressure hydraulic hose designed according to the international standard (SAE J517), specifically for the suction and return lines of hydraulic systems. This hose features a classic three-layer structure design, ensuring stable performance under harsh operating conditions. Its inner rubber layer is made of black, smooth, and oil-resistant synthetic rubber, effectively preventing media corrosion of the pipeline. The reinforcing layer is the core of the hose, using high-strength braided or wound textile fibers combined with a helical steel wire skeleton. This composite structure not only gives the hose excellent tensile strength but, more importantly, provides superior resistance to negative pressure. The outer rubber layer is made of wear-resistant, weather-resistant, and aging-resistant synthetic rubber and meets the MSHA (Mine Safety and Health Administration) flame-retardant standards, enabling it to adapt to harsh industrial environments such as mines and construction sites. The standard operating temperature range of this hose is -40°C to +100°C, meeting the fluid transport needs of most outdoor and harsh operating conditions.
Thanks to its unique structural design, the SAE 100 R4 hydraulic hose has wide applications in various industrial fields, primarily suitable for fluid transport in low-pressure or vacuum conditions:
Critical Hydraulic System Lines: Particularly suitable for the suction line of the hydraulic tank, ensuring smooth oil intake by the hydraulic pump; also commonly used in the low-pressure return line of the system, guiding oil discharged from the actuators back to the tank.
Multiple Media Transport: In addition to conventional petroleum-based hydraulic oils and lubricating oils, this hose is compatible with water, hydraulic fluids, emulsions, compressed air, and industrial water, exhibiting excellent media compatibility.
Mobile and Construction Machinery Equipment:Widely used in the hydraulic systems of construction machinery such as excavators, loaders, bulldozers, and cranes, as well as in the fluid transmission lines of mobile equipment such as agricultural tractors and trucks.
Industrial Manufacturing:Used as a low-pressure connection line in the hydraulic control systems of injection molding machines, presses, metallurgical equipment, and various machine tools, ensuring stable equipment operation.
SAE 100 R4 hydraulic hoses offer numerous advantages in low-pressure hydraulic applications due to their performance characteristics:
Superior Vacuum Resistance and Anti-Collapse Capability: The built-in spiral steel wire reinforcement layer provides excellent rigidity, effectively preventing the hose from being sucked flat or collapsing even under negative pressure conditions up to 0.9 Bar, ensuring continuous and stable fluid delivery.
Excellent Flexibility and Easy Installation: Despite the steel wire skeleton, the textile fiber layer maintains good bending performance with a small minimum bending radius, facilitating hose laying and installation in compact and complex mechanical equipment.
Outstanding Environmental Adaptability and Durability: The outer rubber layer is not only abrasion-resistant and cut-resistant but also possesses excellent ozone, UV, and weather resistance. Whether exposed to outdoor sunlight or in humid mining environments, it effectively slows down aging and significantly extends the product's service life.
Wide range of operating conditions: It can maintain flexibility in low-temperature environments of -40℃ to avoid cracking, while also withstanding high-temperature oil impacts of +100℃ and above, meeting the needs of operation in all seasons and extreme climatic conditions.
Metric Size | Inch Size | SAE Dash size | I.D. | O.D. | W.P. | B.P. | Bending Radius | Weight | ||
(mm) | (mm) | |||||||||
mm | Inches | Dash | Min | Max | Min | Mpa | Psi | Mpa | mm | Kg/m |
19 | 3/4 | 12 | 18.2 | 19.8 | 34.9 | 2.1 | 305 | 8.4 | 125 | 0.81 |
25 | 1 | 16 | 24.6 | 26.2 | 41.3 | 1.7 | 247 | 6.8 | 150 | 0.97 |
31.8 | 1-1/4 | 20 | 30.6 | 33.0 | 50.8 | 1.4 | 203 | 5.6 | 200 | 1.24 |
38 | 1-1/2 | 24 | 36.9 | 39.3 | 57.2 | 1.1 | 160 | 4.2 | 255 | 1.50 |
51 | 2 | 32 | 49.2 | 52.4 | 69.9 | 0.7 | 102 | 2.8 | 300 | 1.89 |
63 | 2-1/2 | 40 | 61.9 | 65.1 | 82.6 | 0.4 | 58 | 1.6 | 355 | 2.54 |
76 | 3 | 48 | 74.6 | 77.8 | 95.3 | 0.4 | 58 | 1.6 | 460 | 3.20 |
89 | 3-1/2 | 56 | 87.3 | 90.5 | 107.9 | 0.3 | 44 | 1.2 | 530 | 3.84 |
Q1: What types of fluids can be transported through SAE 100 R4 hydraulic hoses?
This hose is primarily engineered for petroleum-based hydraulic oils and lubricating oils. Additionally, it is compatible with water-glycol based fluids, water emulsions, compressed air, and plain water in low-pressure return or suction applications.
Q2: What is the operational temperature range for this hose?
The hose is designed to perform reliably in a wide range of environments, typically from -40°C (-40°F) to +100°C (+212°F). This makes it suitable for freezing winter conditions as well as high-heat industrial settings.
Q3: Is the SAE 100 R4 suitable for suction applications? How does it prevent collapsing?
Yes, it is specifically designed for suction service. The hose features a helix spiral wire reinforcement embedded within the textile layers. This helical wire acts as a rigid skeleton, preventing the hose from collapsing or kinking under high vacuum pressure, ensuring a steady flow of fluid.
Q4: What inner diameter sizes are commonly available?
SAE 100 R4 hoses are manufactured in a variety of sizes to fit different hydraulic systems. Standard inner diameters typically range from 3/4 inch (19 mm) up to 4 inches (101.6 mm) or larger. Specific size requirements can often be accommodated through custom manufacturing.
Q5: Can this hose be used for high-pressure applications?
While it is reinforced, SAE 100 R4 is classified as a low-pressure (or return/suction) hose. It is not designed for high-pressure delivery lines found in hydraulic pumps (which usually require wire-braid hoses like SAE 100 R1 or R2). Its strength lies in handling return lines and suction with excellent durability.
Q6: What standards govern the manufacturing of SAE 100 R4 hoses?
This hose is manufactured in accordance with the SAE J517 standard (specifically 100R4), which is an internationally recognized specification for hydraulic hoses. This ensures consistent quality, dimensional accuracy, and performance reliability.
Q7: Is the outer cover resistant to harsh environmental conditions?
Absolutely. The cover is made from a specialized synthetic rubber compound that is not only abrasion-resistant but also offers excellent resistance to weather, ozone, and UV radiation. Many variants also meet MSHA standards for flame resistance, making them safe for underground mining applications.
Q8: What lengths are typically available for this hose?
Standard production lengths usually include 20 meters, 30 meters, or 50 meters per piece, depending on the diameter. However, it can also be cut to specific custom lengths or supplied in bulk coils based on project requirements.
Q9: Can end fittings be attached to this hose?
Yes, the hose is designed to be compatible with standard hydraulic fittings and couplings. It can be supplied with plain ends for on-site crimping, or pre-fitted with flanges, or quick-connect fittings according to customer specifications.
Q10: Why is there a steel wire helix if the pressure is low?
The steel wire helix is not primarily for pressure containment (like high-pressure wire braids). Its main function is to provide crush resistance and vacuum stability. It protects the hose from being flattened by external impacts or weight and ensures the hose maintains its round shape during suction.
The Honestflex SAE 100 R4 is a low-pressure hydraulic hose designed according to the international standard (SAE J517), specifically for the suction and return lines of hydraulic systems. This hose features a classic three-layer structure design, ensuring stable performance under harsh operating conditions. Its inner rubber layer is made of black, smooth, and oil-resistant synthetic rubber, effectively preventing media corrosion of the pipeline. The reinforcing layer is the core of the hose, using high-strength braided or wound textile fibers combined with a helical steel wire skeleton. This composite structure not only gives the hose excellent tensile strength but, more importantly, provides superior resistance to negative pressure. The outer rubber layer is made of wear-resistant, weather-resistant, and aging-resistant synthetic rubber and meets the MSHA (Mine Safety and Health Administration) flame-retardant standards, enabling it to adapt to harsh industrial environments such as mines and construction sites. The standard operating temperature range of this hose is -40°C to +100°C, meeting the fluid transport needs of most outdoor and harsh operating conditions.
Thanks to its unique structural design, the SAE 100 R4 hydraulic hose has wide applications in various industrial fields, primarily suitable for fluid transport in low-pressure or vacuum conditions:
Critical Hydraulic System Lines: Particularly suitable for the suction line of the hydraulic tank, ensuring smooth oil intake by the hydraulic pump; also commonly used in the low-pressure return line of the system, guiding oil discharged from the actuators back to the tank.
Multiple Media Transport: In addition to conventional petroleum-based hydraulic oils and lubricating oils, this hose is compatible with water, hydraulic fluids, emulsions, compressed air, and industrial water, exhibiting excellent media compatibility.
Mobile and Construction Machinery Equipment:Widely used in the hydraulic systems of construction machinery such as excavators, loaders, bulldozers, and cranes, as well as in the fluid transmission lines of mobile equipment such as agricultural tractors and trucks.
Industrial Manufacturing:Used as a low-pressure connection line in the hydraulic control systems of injection molding machines, presses, metallurgical equipment, and various machine tools, ensuring stable equipment operation.
SAE 100 R4 hydraulic hoses offer numerous advantages in low-pressure hydraulic applications due to their performance characteristics:
Superior Vacuum Resistance and Anti-Collapse Capability: The built-in spiral steel wire reinforcement layer provides excellent rigidity, effectively preventing the hose from being sucked flat or collapsing even under negative pressure conditions up to 0.9 Bar, ensuring continuous and stable fluid delivery.
Excellent Flexibility and Easy Installation: Despite the steel wire skeleton, the textile fiber layer maintains good bending performance with a small minimum bending radius, facilitating hose laying and installation in compact and complex mechanical equipment.
Outstanding Environmental Adaptability and Durability: The outer rubber layer is not only abrasion-resistant and cut-resistant but also possesses excellent ozone, UV, and weather resistance. Whether exposed to outdoor sunlight or in humid mining environments, it effectively slows down aging and significantly extends the product's service life.
Wide range of operating conditions: It can maintain flexibility in low-temperature environments of -40℃ to avoid cracking, while also withstanding high-temperature oil impacts of +100℃ and above, meeting the needs of operation in all seasons and extreme climatic conditions.
Metric Size | Inch Size | SAE Dash size | I.D. | O.D. | W.P. | B.P. | Bending Radius | Weight | ||
(mm) | (mm) | |||||||||
mm | Inches | Dash | Min | Max | Min | Mpa | Psi | Mpa | mm | Kg/m |
19 | 3/4 | 12 | 18.2 | 19.8 | 34.9 | 2.1 | 305 | 8.4 | 125 | 0.81 |
25 | 1 | 16 | 24.6 | 26.2 | 41.3 | 1.7 | 247 | 6.8 | 150 | 0.97 |
31.8 | 1-1/4 | 20 | 30.6 | 33.0 | 50.8 | 1.4 | 203 | 5.6 | 200 | 1.24 |
38 | 1-1/2 | 24 | 36.9 | 39.3 | 57.2 | 1.1 | 160 | 4.2 | 255 | 1.50 |
51 | 2 | 32 | 49.2 | 52.4 | 69.9 | 0.7 | 102 | 2.8 | 300 | 1.89 |
63 | 2-1/2 | 40 | 61.9 | 65.1 | 82.6 | 0.4 | 58 | 1.6 | 355 | 2.54 |
76 | 3 | 48 | 74.6 | 77.8 | 95.3 | 0.4 | 58 | 1.6 | 460 | 3.20 |
89 | 3-1/2 | 56 | 87.3 | 90.5 | 107.9 | 0.3 | 44 | 1.2 | 530 | 3.84 |
Q1: What types of fluids can be transported through SAE 100 R4 hydraulic hoses?
This hose is primarily engineered for petroleum-based hydraulic oils and lubricating oils. Additionally, it is compatible with water-glycol based fluids, water emulsions, compressed air, and plain water in low-pressure return or suction applications.
Q2: What is the operational temperature range for this hose?
The hose is designed to perform reliably in a wide range of environments, typically from -40°C (-40°F) to +100°C (+212°F). This makes it suitable for freezing winter conditions as well as high-heat industrial settings.
Q3: Is the SAE 100 R4 suitable for suction applications? How does it prevent collapsing?
Yes, it is specifically designed for suction service. The hose features a helix spiral wire reinforcement embedded within the textile layers. This helical wire acts as a rigid skeleton, preventing the hose from collapsing or kinking under high vacuum pressure, ensuring a steady flow of fluid.
Q4: What inner diameter sizes are commonly available?
SAE 100 R4 hoses are manufactured in a variety of sizes to fit different hydraulic systems. Standard inner diameters typically range from 3/4 inch (19 mm) up to 4 inches (101.6 mm) or larger. Specific size requirements can often be accommodated through custom manufacturing.
Q5: Can this hose be used for high-pressure applications?
While it is reinforced, SAE 100 R4 is classified as a low-pressure (or return/suction) hose. It is not designed for high-pressure delivery lines found in hydraulic pumps (which usually require wire-braid hoses like SAE 100 R1 or R2). Its strength lies in handling return lines and suction with excellent durability.
Q6: What standards govern the manufacturing of SAE 100 R4 hoses?
This hose is manufactured in accordance with the SAE J517 standard (specifically 100R4), which is an internationally recognized specification for hydraulic hoses. This ensures consistent quality, dimensional accuracy, and performance reliability.
Q7: Is the outer cover resistant to harsh environmental conditions?
Absolutely. The cover is made from a specialized synthetic rubber compound that is not only abrasion-resistant but also offers excellent resistance to weather, ozone, and UV radiation. Many variants also meet MSHA standards for flame resistance, making them safe for underground mining applications.
Q8: What lengths are typically available for this hose?
Standard production lengths usually include 20 meters, 30 meters, or 50 meters per piece, depending on the diameter. However, it can also be cut to specific custom lengths or supplied in bulk coils based on project requirements.
Q9: Can end fittings be attached to this hose?
Yes, the hose is designed to be compatible with standard hydraulic fittings and couplings. It can be supplied with plain ends for on-site crimping, or pre-fitted with flanges, or quick-connect fittings according to customer specifications.
Q10: Why is there a steel wire helix if the pressure is low?
The steel wire helix is not primarily for pressure containment (like high-pressure wire braids). Its main function is to provide crush resistance and vacuum stability. It protects the hose from being flattened by external impacts or weight and ensures the hose maintains its round shape during suction.
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