SAE100 R4 for injection molding machines
High Performance SAE100 R4

GR4 (SAE 100 R4) Hydraulic Hose

GR4 (SAE 100 R4)

SAE 100 R4 is a standard specification for low-pressure return lines used in hydraulic systems to absorb and return petroleum and water-based fluids. The hose is made of oil-resistant rubber, capable of withstanding high temperature and pressure environments while maintaining flexibility and tensile strength.

SAE 100 R4 hoses are commonly used in industrial and automotive applications and are reliable for low-pressure oil lines.


GR4 (SAE 100 R4) Structure:

1. Tube: Oil-resistant synthetic rubber

2. Reinforcement: 1 ply or plies of woven or braided

textile fibers with a suitable spiral of body steel wire

3. Cover: Oil and weather-resistant rubber

4. Application: Low pressure and vacuum petroleum base fluid

5. Safety factor:4:1

6. Temperature Range:-40℃ to 100 ℃


SAE 100 R4 tubing is commonly used in oil suction and return applications such as:

Hydraulic system: used for oil suction and return pipelines in hydraulic transmission systems, including industrial machinery, construction machinery, agricultural machinery, etc.; such as rolling mills, cranes, injection molding machines, etc. steel mills in industrial machinery, and tractors in agricultural machinery, Combine harvesters, irrigation equipment, etc., all use SAE 100 R4 tubing in hydraulic systems.

Ships: used for oil suction and return pipelines, including main engines, auxiliary engines, pumping stations, etc.;

Construction machinery: excavators, loaders, bulldozers, etc., such as hydraulic oil tanks, steering gears, hydraulic pumps, and other parts of excavators;

Automobiles: automobile engines, transmissions, steering gears, etc.;

Aircraft: aircraft engines, hydraulic systems, fuel systems, etc.

Applicable Standards: SAE 100 R4

Part No.I.D. O.D.W.PB.PB.RW.T

Continuous Brand Layline Example:

SINOPULSE SUCTION HOSE GR412 – SAE J517 100R4 3/4″ (DN19) Max. W.P. 2.1MPa (305PSI) -2Q11-

Raw Material:

Imported rubber material Vietnam and Thailand
High tensile strength 2750Mpa steel wire from China’s first-class factory
Powerful, safe and stable hydraulic hose products
Good dispersibility, high bearing pressure and superior pulse performance.
Excellent oil resistance, heat resistance and aging resistance.
Excellent bending resistance and fatigue resistance

Factory Workshop:

Sinopulse is a 100% manufacturer of hydraulic hoses and industrial hoses, including all oilfields, agriculture, transportation, construction, mining, and forestry.
Daily output 500,000 meters of hoses, workshop covering 40,000 m²

40 production lines, involving high-speed joint machines, braiding machines, high-speed spiral machines, Italy VP automatic industrial machines, and Complete series Laboratory Testing Equipment

120 Skilled workers, 6 Engineers with 2 technical counselors from famous international companies,2 QC departments, and 2 warehouse managers are fall of our lovely people.

50 Sales and three groups of logistics specialists serve our clients from Italy, Germany, Uk, Spain, the USA, Canada, Brazil, Argentina, Panama, Peru, Chile, Viet Nam, Indonesia, Australia, Romania

Production equipment and workshops for hydraulic hoses
Production equipment and workshops for hydraulic hoses


Our factory introduces a full range of laboratory testing equipment. It has advanced laboratory capabilities to conduct product quality testing and research and development work to ensure stable and excellent product quality.
After purchasing raw materials, we test each batch to ensure they meet our product’s technical requirements.
After production, we test each hose, its working and burst pressure, and conduct a pulse test for each order to ensure that it is 100% qualified after leaving the factory.
We strive to provide our customers with top-notch hoses, doing everything we can to ensure their quality.
“Let our end users feel comfortable in use and safe in driving!” is our common goal.

Complete laboratory testing equipment
Complete laboratory testing equipment

Product packaging:

1. When packing hydraulic hoses, cartons or wooden boxes according to customer requirements.
2. We will pack the hose after finishing the hose production.
3. Generally, woven bags and plastic films are used for packaging.
4. Special packaging can be provided according to customer requirements. Special packaging is a request of Edible ACC Ording customers.

Sinopulse Hydraulic hose loaded into the container shipping
Sinopulse Hydraulic hose loaded into the container shipping