Recommended For:Petroleum and water-base hydraulic fluids in suction lines or in low pressure return line. Meets or exceeds requirements of SAE 100 R4. Uses half the bend radius of SAE 100R4.
Tube:Black, synthetic rubber is specifically designed for resistance to high emperatures.
Reinforcement:Double spiral textile (braid for -12, -16 and -20) reinforced with a helical spiral-wire to prevent collapse.
Cover:Black synthetic rubber is oil and abrasion resistant.
Temperature Range:-40℉ to +212℉ (-40℃ to +100℃)
STANDARD: SAE 100 R4
| Item Code | Hose I.D. | Hose O.D. | Working Pressure | Burst Pressure | Min.Bend Radius | Weight | ||||||
| mm | inch | max | inch | MPa | psi | MPa | psi | mm | inch | kg/m | lb/ft | |
| R4-19 | 19 | 3/4" | 34.9 | 1.37 | 2.1 | 305 | 8.4 | 1218 | 125 | 5 | 0.92 | 0.62 |
| R4-25 | 25 | 1" | 41.3 | 1.63 | 1.7 | 245 | 7 | 1015 | 150 | 6 | 1.1 | 0.74 |
| R4-32 | 31.5 | 1 1/4" | 50.8 | 2 | 1.4 | 203 | 5.6 | 812 | 200 | 8 | 1.3 | 0.87 |
| R4-38 | 38 | 1 1/2" | 57.2 | 2.25 | 1.05 | 152 | 4.2 | 609 | 255 | 10 | 1.8 | 1.21 |
| R4-52 | 51 | 2" | 69.9 | 2.75 | 0.7 | 102 | 2.8 | 406 | 300 | 12 | 2.23 | 1.5 |
| R4-63 | 63 | 2 1/4" | 82.6 | 3.25 | 0.4 | 58 | 1.7 | 245 | 355 | 14 | 3.23 | 2.17 |
| R4-76 | 76 | 3" | 95.3 | 3.75 | 0.4 | 58 | 1.6 | 232 | 460 | 18 | 4.25 | 2.86 |
| R4-89 | 89 | 3 1/2" | 107.9 | 4.25 | 0.3 | 43.5 | 1.25 | 182 | 530 | 21 | 5.05 | 3.39 |
| R4-102 | 102 | 4" | 120.7 | 4.75 | 0.25 | 36.5 | 1 | 145 | 610 | 24 | 5.6 | 3.76 |
SAE 100 R4 Oil Suction and Return Hydraulic Hose
Hydraulic hose SAE 100 R4 is mainly used for oil suction and delivery in hydraulic systems. The inner and outside tube are made of high-quality oil-resistant synthetic rubber. The middle reinforcement layer is one or more layers of textile fibers with high tensile spiral steel wire, making the hoses have more solid structure and longer service life.
Hydraulic hose SAE 100R4 can be used for petroleum and water based hydraulic fluids. It widely serves in various machines like tractor, crane, road roller. In addition, it’s ideal for other vehicles such as car, bus, harvester and many others.
We can not only produce oil suction and discharge hose, but also provide corresponding hose coupling to maintain the sealing of the pipeline.
We has our own production plant, the daily output can reach 50,000 meters hoses. There are more than 50 employees, everyone will abide by professional norms and complete the work with quality and quantity. We have 20 years of experience in the production of hydraulic hoses. We will take every order seriously and treat every customer with care.
Not only will the raw materials and production process be strictly controlled, but also the finished products will be tested for pulse and wear resistance. For low-temperature high-pressure hoses, this special pipe will be subjected to strict low-temperature bending tests. Ensure that every hose is qualified.
What is SAE 100R4?
SAE 100R4 is a hydraulic oil suction hose suitable for suction and delivery of hydraulic oil in hydraulic systems. It has a three-layer structure, the inner tube is smooth and oil-resistant synthetic rubber, the reinforcement layer is high-strength synthetic cord and spiral steel wire, and the outer cover is weather-resistant synthetic rubber. The working temperature is – 40 ℃ to + 100 ℃. The conveying media include mineral oil, polyethylene glycol-based hydraulic oil, hydraulic oil, etc.
What is the pressure rating of 100R4?
The inner diameter size of SAE 100R4 hydraulic suction hose ranges from 3/4″ to 4″. The working pressure is 58PSi ~ 305PSI, which is a low-pressure hydraulic hose. The larger the inner diameter, the smaller the pressure it can withstand. The bursting pressure is four times the working pressure, and it has a higher safety factor.
What is the bend radius of SAE 100R4?
The inner diameter size of SAE 100R4 hydraulic suction hose ranges from 3/4″ to 4″, the bend radius is 120mm~610mm, because its reinforcement layer is high-strength textile, it has a small bending radius.
Choosing the Right R4 hydraulic hose for Petroleum and Water-Based Fluids in Suction Lines
Choosing the correct R4 hydraulic hose for conveying petroleum and water-based hydraulic fluids in suction lines requires focusing on the hose's specialized structure designed to prevent collapse and ensure fluid compatibility under negative pressure conditions.
The primary function of the R4 hydraulic hose is as an oil suction and return hydraulic hose, meaning it operates under low pressure and is specifically engineered to handle the vacuum created by the pump when drawing fluid. The most critical structural feature addressing this is the helical spiral-wire reinforcement. This internal wire, along with the double spiral textile (or braid), provides a rigid skeletal structure that actively prevents collapse of the inner tube. This is essential for suction applications, as a collapsed hose would severely restrict fluid flow, leading to pump cavitation and system failure. The helical wire ensures the hose maintains its full inner diameter and flow capacity, even under high vacuum or when subjected to external pressure.
Fluid compatibility is equally important. The R4 hydraulic hose is specifically designed for use with both petroleum and water-base hydraulic fluids. This versatility is achieved because the tube is made of black, synthetic rubber formulated for resistance to high temperatures and compatibility with these diverse media. This resistance prevents the inner tube from degrading, swelling, or contaminating the fluid, which is crucial for the efficient and safe operation of the hydraulic system.
Furthermore, selecting the right size is paramount for optimal performance. The working pressure is 58PSI-305PSI, classifying it as a low-pressure hydraulic hose. When choosing, it is important to remember the inverse relationship between size and pressure capacity: the larger the inner diameter, the smaller the pressure it can withstand. Therefore, matching the hose's inner diameter and rated pressure to the specific flow and vacuum requirements of the suction line ensures maximum efficiency and a longer service life for the R4 hydraulic hose.
Changing Hydraulic Hose Safely: Tips for Replacing SAE 100 R4 Hoses in Industrial Equipment
When changing hydraulic hose safely, particularly replacing SAE 100 R4 hoses in industrial equipment, adherence to safety protocols and specific procedures is essential to prevent injury and ensure the correct function of the replacement component.
Before commencing replacement, the most critical safety step is to de-energize the hydraulic system. This means turning off the machinery, relieving all internal pressure, and locking out the power source. Since the SAE 100 R4 is a low pressure return line or suction hose, one must ensure both positive and negative pressures are neutralized. Never attempt to disconnect a hose under pressure, as even low pressure can spray hot hydraulic fluid, posing a severe burn hazard.
When physically replacing the hose, meticulous attention must be paid to matching the original component. The new SAE 100 R4 hose must meet or exceed the original hose's specifications, including temperature range and inner diameter. It is also crucial to match the reinforcement type and ensure the replacement includes the vital helical spiral-wire to prevent collapse, which defines this suction hose. When routing the new hose, it should follow the path of the original, avoiding sharp bends that exceed the small bend radius capability of the hose, as well as minimizing contact with sharp edges or high-heat components.
Finally, ensuring cleanliness and proper connection is key to extending the life of the new hose. The replacement should be performed in a clean environment to prevent contaminants from entering the hydraulic system. The corresponding hose coupling must be securely attached to maintain the sealing of the pipeline, and all connection points should be torqued according to manufacturer specifications. After installation, the system should be slowly re-pressurized and checked thoroughly for leaks before being returned to full operation.
How 100R4 Hydraulic Hose Maintains Flexibility With a Small Bend Radius for Confined Spaces
The 100R4 hydraulic hose is specifically engineered to maintain excellent flexibility with a small bend radius which makes it ideal for installation in confined spaces common in agricultural and construction machinery. This key performance characteristic is achieved through the hose's unique layered reinforcement design.
Unlike high-pressure hoses that rely on multiple layers of rigid steel wire spirals, the 100R4 hydraulic hose is rated for low pressure applications and utilizes a specialized structure. The reinforcement layer combines double spiral textile (or braid) with a helical spiral-wire. The textile elements provide inherent flexibility, allowing the hose to bend easily. The helical spiral-wire, while essential to prevent collapse under suction, is positioned in a way that allows for considerable bending without permanent deformation or kinking. This combination allows the hose to achieve a small bending radius, making it significantly more adaptable than rigid wire-braided hoses.
The hose's overall construction also contributes to its flexibility. The inner tube is smooth and made from synthetic rubber, and the cover is also made from a flexible, oil, and abrasion resistant synthetic rubber. These materials are chosen to resist hardening within the specified temperature range, ensuring that the hose maintains its pliability whether operating in cold conditions or under high-heat exposure.
This small bend radius capability is critical when installing hydraulic lines in complex or tight vehicle chassis found in tractors, cranes, and road rollers. It allows technicians to route the hose around tight corners and components without compromising the structural integrity of the suction and return line. The combination of low-pressure application and helical wire reinforcement enables the 100R4 hydraulic hose to meet challenging installation requirements where space is limited, ensuring reliable fluid delivery where other, less flexible hoses would fail.
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