Hydraulic fittings connect the wires in the hydraulic system, such as hoses and pipes. Most fittings have a male and female component connected to form a connection. These connections help control and guide the flow of hydraulic fluid in the conductor while preventing leakage and maintaining pressure.
If you are looking for more details, kindly visit SANYEFLEX.
There are mainly five well-known hydraulic fitting suppliers in the world. They are Bosch Rexroth, Daikin Industries, Eaton, Kawasaki Heavy Industries, Parker Hannifin. We are familiar with these five major hydraulic fittings supplier brands, as well as some Hydraulic accessories companies we do not know, how we choose to follow them and buy their products. Please be patient and read the suggestions.
Hydraulic hose fittings and adapters are widely used in hydraulic systems to connect hoses to other hydraulic components such as valves, actuators, and cylinders to allow fluid conveyance. Although hose fittings and adaptors seem to be very tiny parts of the hydraulic systems, they perform very critical roles in providing strong and secure connections by maintaining safe pressure and preventing potential leakage.
Unfortunately, hydraulic fittings and adapters of wrong choice will cause slow down, or “strikes” of working hydraulic systems, or even worse, accidents and casualties. To avoid all these hassle and hazard, it is essential to find suppliers who are capable of supplying hydraulic fittings and adapters that are strong, reliable, and versatile enough to perform safely and effectively in respective applications.
China is the biggest exporter of steel fittings and adapters around the world. No matter you are buying from local, or foreign countries such as Korea, Italy, Turkey, etc, it would make sense to start sourcing from China. They will make great substitutes.
If you already started buying from China, here are some keys to ask before finalizing your supplier's list.
Carbon steel: #45, #35, #20, 08F. Price could vary greatly with different materials been used, with most expensive #20 #35 and least expensive 08F. Sometimes you getting cheaper ones is only because your supplier is using cheap steel. It is not always a bad case as you could happen to just need cheap steel. Let's say your hydraulic system is not very demanding in pressure, it is economic to use 08F rather than #20 #35. Nevertheless, if your hydraulic application is critical in pressure, it is rational to buy #20 #35 #45 to avoid any potential explosion.
The most common plate is zinc plating, also known as Cr3+ plating. However, the price could again differentiate with same plating. Therefore, it is smart to ask about corrosion resistance time, also known as salt spray test hour. Usually, the industry standard is 96 hours, but prices make differences. It could be as low as 72 hours, or as long as 560 hours or above, depends on your specific needs. On the other hand, there is other kinds of plating such as Nickle zinc plating, which is more expensive and of course for more demanding applications.
The most popular standards of hose fittings and adapters are SAE and Eaton. They differ in hexagons as people in different countries use different wrenches. Overall SAE and Eaton standards are interchangeable, but countries do have their own preferences. Therefore, it would be wise to make sure which standards you use and inquire accordingly.
It is important for your supplier to have his/her own forge plant to lower home costs, maintain consistent product quality, and fasten lead time.
Keep these in mind and you will probably find a great supplier.
There are many manufacturers and suppliers of large and medium hydraulic hose fittings worldwide. China is currently the world's largest exporter of hoses. What are the benefits of choosing Chinese hydraulic hoses?
The three most mainstream ways to find lift manufacturers in China
When it comes to price, you may often hear suppliers asking how much you want to buy. As you can see, the reason is that mass production is more efficient and less expensive for the factory.
If a production line needs to switch orders back and forth, efficiency suffers. If you are buying in bulk, you can ask your Chinese supplier for more price support.
One thing you should know is that components used by different suppliers can vary widely, even if they are the same hydraulic fitting.
Third, timely delivery will minimize your out-of-stocks. Especially if you are doing some marketing activities, we should prevent late delivery.
In addition to the above three aspects that need attention, there are some places that need special attention.
Different markets have different functional requirements and specification requirements. Therefore, customization for a variety of different needs is very important.
In addition, the technology of hydraulic joint products is also more mature.
You can specify the features you want in a product and then check with the vendor to see if the product meets your needs.
Hydraulic fittings are a production machine with very high barriers to entry. For European countries, CE certificate is mandatory. For the US market, both exporters and importers are required to register with the FDA if they sell as "hydraulic accessories".
Having said that, you should verify their eligibility.
Besides product, price and delivery time, the service of the supplier is also important. Whether it's answering your questions in a timely manner or helping you with after-sales issues, these can impact your business operations.
You can observe the supplier's performance during the communication process to see if they have these experiences and the ability to provide good service.
Lake Hydraulics was founded in and is dedicated to the development and manufacture of hose fittings, hydraulic adapters, hose assemblies and other related products that are widely used in mining, machinery, transportation, shipping, and oil fields.
Company
Laike Hydraulics
Established
Size of the factory
18,000 square meters
Number of personnel
> 100 people
Certificates
ISO：，RoHS
With reliable quality, decent price, and superior service, we have successfully established our reputation and won over customers from worldwide. Some of our big clients are Parker, Eaton, Terex, PrincessAuto, etc. Our cooperation includes OEM/ODM service, customization, and so on. We will strive to keep up our work, upgrade and improve, innovate and invent, and thus strengthen the partnerships with our clients.
If you need to purchase hydraulic accessories or hoses, please contact us. Or visit our website.https://www.laikehydraulics.com
Once you understand your requirements, the rest of the process becomes much simpler. However, it’s crucial to keep three key points in mind:
Hydraulic hose part numbers reflect the inside diameter in 16ths of an inch.
For instance, a "-6" indicates a 3/8-inch inside diameter, "-8" represents a 1/2-inch inside diameter, "-10" corresponds to 5/8-inch, and "-16" refers to a 1-inch inside diameter. Taking -6 as an example, the part number H identifies a hose in the H280 series, with a size -6 (or 3/8-inch inside diameter). The H280 series is a two-wire braided hydraulic hose widely used across the hydraulic industry.
Most hydraulic hoses have a 4:1 safety factor.
This means a hose rated for 3,000 PSI must have a burst pressure of at least 12,000 PSI, ensuring a high margin of safety during operation.
Hydraulic hoses are designed with multiple layers for strength and durability.
Inside the hose, a reinforced rubber or thermoplastic conduit carries the hydraulic fluid. Surrounding this, a flexible metal or fiber wire wrap provides the strength needed to withstand high pressures. The outer covering protects the reinforcement layer from corrosion, abrasion, and other environmental factors.
Three Layers of a Hose Structure
While there are many types and uses for rubber hoses, all hoses have one basic function: to transport liquids or gases. In terms of the construction of rubber hoses, most hoses are made up of three layers.
The first layer is the innermost "tube", which is formed when rubber is forced through a profile to a specific size, and it serves two purposes: to contain the liquid being transported and to resist being broken down by the liquid.
The second layer is a reinforcement layer, called reinforcement. If the pressure of the contained fluid suddenly increases, the pipe may require a fabric or wire carcass reinforcement. This ensures that the pipe is protected from internal pressure and external forces. Carcass reinforcement wire is applied by braiding, knitting, spiraling, winding or weaving.
The third and outermost layer is the "cover". The cover provides additional protection for the hose from external damage and environmental degradation, such as ozone. The cover can be color coded to aid identification or improve aesthetics. While reinforcement and cover layers are commonly used, "homogeneous" hoses with no added layers are also available.
The tube protects the reinforcement from internal forces, while the cover's primary function is to protect the reinforcement from external forces. Liners and covers are made from various types of rubber, including natural rubber, styrene-butadiene rubber (SBR), nitrile rubber, butyl rubber, and EPDM. Typical reinforcement materials include cotton rayon, polyester, nylon, aramid fiber, and steel wire.
3 Hose Options
As mentioned above, there are three main choices for hose material and construction on the pressure side of the hydraulic system and one on the return side in most applications.
1. Nitrile
Nitrile hydraulic hoses are the most common as they are compatible with most hydraulic fluids. They are either made with a textile braid for low pressure applications under 1,000 PSI or a high tensile strength steel wire braid for pressures up to or over 7,000 PSI. Steel wire reinforcement is the most common and the number of braid layers can range from one to six.
1-Wire Braid – Less common than 2-Wire hoses. Used in low pressure hydraulic systems.
2-Wire Braid – Widely used due to its affordable price and wide range of medium pressure applications.
4-Wire Braid – Commonly used in heavy equipment, it can handle high pressures from 4,000 to 6,000 PSI and is suitable for handling frequent pressure pulses.
6-Wire Braid - Typically used for large diameter hoses that require ultra-high pressures up to 7,000 PSI.
Some manufacturers make hoses with extra durable covers for applications that require protection from severe impact and abrasion. These hose covers are typically Ultra High Molecular Weight Polyethylene (UHMW), a very tough plastic that is highly resistant to abrasion and wear. Polyethylene is a popular plastic for many industrial applications that require good chemical resistance, high durability, and a low coefficient of friction.
2. Thermoplastics
Thermoplastic Polyurethane (TPU) is a type of thermoplastic polyurethane used to make hydraulic hoses. It is typically constructed of a nylon tube, synthetic fiber reinforcement, and a polyurethane cover. Due to its low electrical conductivity, it is often used in common hydraulic applications such as basic material handling equipment and near electrical systems, such as bucket lifts for servicing electrical wires. It is often used in applications where steel wire reinforcement is not appropriate and can withstand pressures similar to 1 and 2 braided steel wire hoses. The polyurethane cover is resistant to abrasion and is often used near forklift chain rollers.
Thermoplastic hydraulic hose has the durability and strength of plastic with the flexibility of rubber. It is an extremely versatile material that can withstand temperatures up to 275°F (135°C). They are often used in high-pressure hydraulic systems, chemical gas handling, and other applications that require pressurized gas delivery.
3. Teflon/PTFE
Want more information on hydraulic hose manufacturers in china? Feel free to contact us.
PTFE is a generic formulation of DuPont Teflon material. PTFE hydraulic hose consists of Teflon tube and stainless steel braid reinforcement and does not require an outer layer because the stainless steel braid does not corrode in most cases. Teflon hose is used for chemical compatibility, corrosion resistance, and high temperature applications up to 450°F (232°C).
When specifying Teflon hose, size and bend radius should be considered. Sizes are generally 1/16 inch smaller than the part number shown. For example, a -6 is 3/8 inch for other hose materials, but a -6 is 5/16 inch for Teflon.
Also, the bend radius is not as small as with other hose materials. Teflon hose is a hard plastic - if you bend it to the point of kinking, there is a weak section and the hose will fail.
Hydraulic Return Hose
The return hose is used to handle suction and return hydraulic fluid back to the system. The hydraulic return hose is usually a rubber hose with a textile braid that creates positive pressure through the spiral wire to create suction.
Rubber Hose Manufacturing
In terms of manufacturing, rubber hoses are produced in a variety of ways, including extrusion, spiral wrapping, calendaring, hand layup, and molding. Generally speaking, small diameter hoses are primarily produced by extrusion, while large diameter hoses are often produced by spiral wrapping.
Rubber Hose Industry
Now that we understand the structure of rubber hoses, let's explore the rubber hose segment of the industrial rubber products industry, which includes vehicle, fluid power, water, air, and other industrial types.
Vehicle hoses are and will continue to be the largest market segment, accounting for more than one-third of total hose demand. Rising vehicle production and an increase in the total number of vehicles in use are driving demand in the OEM and replacement markets, respectively. High-value custom hoses designed for under-the-hood applications in harsh environments also support demand.
Rubber Hose Market
Rubber hoses are used in a wide range of durable goods, including industrial machinery, motor vehicles, aerospace equipment, and other transportation equipment. Nearly two-thirds of total rubber hose demand comes from industrial equipment, including off-road equipment such as construction and agricultural equipment. Almost all categories of hoses are used in industrial equipment, with fluid power, industrial, and vehicle hoses being particularly prevalent. The automotive industry is also a large consumer of rubber hoses for engine, transmission, steering, air conditioning and brake systems.
Applications of Rubber Hoses
Now that we know about rubber hoses, manufacturing, the industry, and the market and demand, let’s now turn our attention to the applications of rubber hoses. Since rubber hoses are flexible and can absorb vibrations, they are suitable for designs that move and shake. High-pressure hydraulic applications often use hoses to contain water-oil and water-glycol mixtures as well as low-viscosity mineral oils.
Step-By-Step Hydraulic Hose Fabrication
Step 1: Gather Tools and Materials
Hydraulic hose
Hydraulic hose fitting
Hose lubricant
Calipers
Paint pen
Safety goggles
Crimping machine
Crimping die and collar
Ultra Clean nozzle, projectiles, and seal caps
Step 2: Wear Safety Equipment
Always wear safety goggles while cutting and crimping to comply with company safety protocols.
Step 3: Measure and Cut the Hose
Measure the required hose length and cut it using a hose saw. Consider the cutoff factor for critical lengths.
Ensure a clean edge after cutting; use a file if necessary.
Clean the hose ends to minimize contamination. Fire Ultra Clean projectiles through the hose from both ends to remove debris and ensure cleanliness.
Step 4: Select Fitting Series
Choose the appropriate fitting series based on:
Working pressure
Style and type
Orientation
Attachment methods
Corrosion-resistant material
Important: Do not mix hose and fitting brands.
Step 5: Mark Insertion Depth and Attach Fittings
Use a depth block to mark the insertion depth on the hose with a paint pen.
Lubricate the hose with P-80 if needed, avoiding lubrication for spiral hoses.
Push the hose into the fitting until the mark aligns with the fitting shell's edge.
Step 6: Verify Crimper Settings
Confirm the crimping machine's capabilities.
Adjust the settings or replace the die as needed to match the hose specifications.
Use Parker Crimpsource or similar references for technical specifications.
Step 7: Select the Crimping Die
Choose the correct die set based on the crimper decal and hose type. Lubricate the die bowl with lithium-based grease if needed.
Step 8: Position the Hose in the Crimper
Insert the hose into the crimping machine (bottom-loading) until the fitting is visible above the die.
Ensure the top of the fitting is aligned properly, with the fitting resting on the die step.
Step 9: Install the Die Ring
Place the die ring on the adapter bowl as instructed by the crimper decal.
Step 10: Crimp the Hose
Turn on the machine and let the cylinder head move down.
Allow the collar to compress the die fully. Avoid touching the machine until the process completes.
Step 11: Verify Crimp Diameter
Check the hose for movement by inspecting the paint mark. If it’s misaligned, the crimp is invalid.
Measure the crimp diameter on the fitting and compare it to the decal reference. Ensure the crimp matches specifications.
Step 12: Cap the Hose Assembly
Clean the hose ends and cap both ends with plastic or heat-shrink caps.
Use UltraClean heat shrink caps for a contamination-free seal. These are available in various sizes and quantities to meet your needs.
If you want to learn more, please visit our website dredge hoses.