Hydraulic Fitting Material and Temperature:
Sinopulse Hose Factory Co., Ltd.'s comprehensive range of hydraulic fittings fulfills todays application requirements as well as state of the art safety and quality needs. Our fittings are specifically designed to perfectly match with the respective hose types for superior service life and leak free operation.
Selection criteria & points of attention, Hydraulic fittings are used to connect all cylinders, tubes,power sources, gauges,components and hoses in a hydraulic system. Sinopulse Hose Factory Co., Ltd. fittings provide flexible, safe and leak free connections.We also carries stainless steel hydraulic hoses along with stainless steel hose end fittings.
The following criteria should be considered before selecting the correct hydraulic fitting types for your application:
Size: The internal and external diameter of the fittings are two important sizes to consider. These diameters of the fitting should be compatible with the hose diameter. Over or under-sized fittings can cause leakage or the connection to fail.
Material: The material of the hydraulic fitting should be compatible with the hydraulic fluid and with the operating environment. The most commonly used fitting materials are brass, aluminum, steel, or stainless steel. NBR (Nitrile) O-rings are the most widely used sealing materials.
Temperature: The hydraulic fittings should be suitable for your temperature range.
Pressure: The hydraulic fittings must be suitable for your pressure range, including the pressure spikes. Operating beyond this range can cause damage to the fittings.
Application: The type of application also determines the fitting type to be used. Tee- or cross- fittings are used for mixing or distribution application.
Assembly: If the hydraulic system requires frequent connecting and disconnecting of the hose or tube, the hydraulic quick-connect fittings can be used. Similarly, hydraulic compression fittings can be used to remove the need for welding or soldering of the fitting. It uses a compression nut to tighten against the ferrule creating a very tight seal. It can be used in areas with high temperatures as welded joints can leak in such environments.
Hydraulic Fitting Types and Applications:
Hydraulic fittings come in a wide range of types and applications. They are used to connect the hydraulic hose to components like hydraulic cylinders, pipes, tubes, or different types of hydraulic hoses in hydraulic systems.
The different types of hydraulic fittings allow the fluid to flow, change its direction, divert, or mix. These fittings should be capable of creating a tight seal and preventing leakage in the application. These fittings are widely used in hydraulic-powered applications including plumbing, robotics, assembly lines, and heavy equipment.
Hydraulic fittings are used for piping and tubing with hydraulic hoses in the following applications:
1、Construction and mining equipment.
2、Factory applications like assembly lines, presses, robotics, hydraulic power units.
3、Plumbing applications.
4、Oil and gas industry.
5、Agricultural equipment.
Different Types Of Hydraulic Fittings:
While there might be hundreds if not thousands of hydraulic fittings and connectors, they all boil down to three basic types.
These three types are either metal seal, soft seal, or tapered thread connectors. No matter which of these types of fittings yours belongs to, it will be required to satisfy two conditions: it must seal and it must hold.
In some cases, the same mechanism can fulfill both functions, and in other cases, two different parts of the same mechanism will handle the necessary functions.
Tapered pipe connectors are cut on a taper with a pipe’s diameter, and it changes along the entire threaded portion of a pipe, in order to make the connection tighter.
These types of fittings require a sealer, so you can be sure there will be no leakage around the fitting, and this is usually accomplished with a chemical sealant or a tape sealant.
While it might be difficult to orient the tapered pipe threads correctly, it’s very important to do so, because a poor seal might result in leakage when pressure is applied.
If there is a disadvantage to tapered pipe connections, it’s that they must be either soldered or welded to tubes when making a connection.
Metal seal connectors were invented largely to provide an alternative to tapered pipe thread varieties. This type uses a tapered thread combined with a machined face, to provide a seal capable of handling the typical high pressure associated with hydraulics.
The thread helps to accomplish the holding power, while the sealing is managed by the machined face.
These kinds are easier to orient than a tapered connector, and they generally provide a better seal, without the need for any kind of additional sealant.
However, they do still require welding or soldering to the tube. Soft seal are probably the most popular type used today, and these have an elastomeric seal that prevents leakage even under high-pressure situations.
One of the big advantages to using soft seal connectors is that they can be installed very quickly, and this is highly advantageous in industrial applications.
They are also capable of resisting heavy vibrations which many systems are subject to, so they don’t break down nearly as frequently.
Hydraulic Fitting Related Question:
SAE stand for in hydraulic fittings?
SAE stands for the Society of Automotive Engineers, an organization that develops standards and develops technical information and expertise.
What are hydraulic fittings?
Hydraulic Fittings are used to connect a hydraulic hose to components like hydraulic cylinders, pipes, tubes, or different types of hydraulic hoses. The different types of hydraulic fittings allow the fluid to flow, change its direction, divert, or mix.
How to seal hydraulic fittings?
Hydraulic fittings are either self-sealing, such as SAE flanged fittings, sealed by using an o-ring, or through the use of thread sealant.
How to install hydraulic hose fittings?
Begin by selecting the appropriate fitting for your application and cutting the hose to the required length. Insert the hose into the fitting and crimp the hose. Clean the assembly to ensure debris does not enter the system.
Do you use Tteflon tape on hydraulic fittings?
No, Tteflon tape should not be used on hydraulic fittings. Hydraulic fittings usually seal on the thread or through the use of an o-ring.
Determine the hydraulic fitting sealing technique.
Hydraulic fittings are classified according to their size, configuration, and thread type. Hose fittings are classified into three types: O-ring, mated angle, and threaded. There are, however, several other types of hydraulic hose fittings available.
Hydraulic Hose Fittings Identification - Parker Hose Products Division - Mated Angle Seals.
Mated Angle: SAE 45° or JIC 37° are two examples of mated angles, but there are others.
Angle seat fittings have straight or parallel threads for sealing. The male and female counterparts are threaded together, but the threads do not form the seal. Instead, they work mechanically to bring the two mating angle seats together, forming the seal.
Hydraulic Hose Fittings Identification - Parker Hose Products Division - O-Ring Seals O-ring seal designs include O-ring bosses, flat face O-ring seals, and O-ring flanges. The main component in creating the seal with these types of couplings is an O-ring seal.
Common Hydraulic Fluids
Water-based fluids: These fluids have high water content, so, they are used for fire-resistance. They are available as water-in-oil emulsions, oil-in-water emulsions, and water-glycol blends. They are more expensive than petroleum-based fluids and have lower wear resistance.
Synthetic-based fluids: These fluids are man-made and provide advantages like fire-resistance, lower friction, and thermal stability. They are ideal to use in high-temperature and high-pressure applications due to their excellent lubricating property. However, they are more expensive than petroleum-based fluids and maybe slightly toxic.
Petroleum-based fluids: Petroleum or mineral-based fluid is the most used hydraulic fluid. Additives in such fluids provide protection from rust and oxidation, wear and tear, corrosion, and extreme pressure. These fluids are generally high quality, low cost, and widely available.
Hydraulic Fitting Link:
Tapered Threads: These fittings have two thread types: male and female. Female fittings have threads on the outside, while male fittings have threads on the inside.
Hydraulic Hose Fittings Identification - Parker Hose Products Division - Tapered Threads
When the male and female counterparts are threaded together, the tapered threads deform, applying pressure to the couplings and resulting in a tight seal. Tapered threads can be imprecise, but tape should never be used to ensure a tight seal.
Tape is frequently prohibited in hydraulic and pneumatic systems due to its proclivity to shred and contaminate sensitive areas. Its lubricity has also been linked to over-torquing.
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Common Hydraulic Fitting Types:
BSPT (JIS-PT) – commonly known as the British Thread Type, these are standard fittings which have been internationally adopted for sealing pipe ends and making connections.
NPT/NPTF – the most commonly used type of thread in North America, these are recognizable by the tapered inner diameter and the tapered outer diameter, making the fitting self-sealing.
SAE Straight Thread – a very reliable and reusable thread type, these have excellent sealing because of the 90-durometer O-Rings.
DIN Metric – DIN is the German Industrial Standard, and these are popular throughout Germany and much of Europe.
Metric Taper – the most commonly used thread type in Europe, it is well known for its precise cylindrical inner and outer diameters.
JIS-B2351 – largely used as hose adapters for equipment designed in Japan or Korea, these usually have BSP threads.
ISO 6149 – has a metric straight thread O-Ring port, which is very useful for diagnostic port applications.
BSPP (JIS-PF) – JIS stands for Japanese Industrial Standards, and these BSPP connectors follow the standard British thread dimensions
4-Bolt Flange – there are a number of different types of 4-bolt flange options, either for normal duty or heavy duty.
We provide hydraulic fitting type:1. Ferrule/Sleeve 3. Hydraulic Adapter 2. Hydraulic Fittings 4. Hydraulic Quick Coupling.
The Most Common Hydraulic Fitting Connections:
37 degree flare
45 degree flare
30 degree flare (metric)
30 degree flare (BSPP)
60 degree NPSM Swivel
60 degree Cone (BSPP)
24 degree flareless (DIN)
60 degree Cone (Metric)
O-Ring Face Seal (ORFS)
24 degree flareless (SAE)
To determine the type you’re actually working with, there’s a simple four-step process involved. First of all, you need to figure out whether it’s a permanent or reusable type, and the permanent fittings will be those which are crimped. These are easier and quicker to attach than reusable fittings are, and that makes them ideal for applications in the fluid power industry.
Next you need to identify the port connections before you attempt to install a hose or tube assembly, and those port connections are the ones listed above. Then you need to identify the particular sealing method, and this will generally be an automated angle, tapered threads, or an O-ring. After having determined the sealing method, you have to use a seat gauge in order to determine the seat angle.
The last thing you need to do is measure the thread, and this will call for the use of calipers. By determining the number of threads per inch on both the outside diameter and the inside diameter, you’ll be able to get an accurate reading of the thread size. Now that you know exactly which kind you’re working with, it will be fairly easy for you to call a supplier and order that precise connector.
