What is the best type of hydraulic fitting?

July 14,

Check now

How to Identify the Correct Hydraulic Hose Fittings

When you have a worn hydraulic hose fitting, you'll have to identify exactly which type you have so you know what to order from your supplier. If you've written all these connectors down somewhere, you'll be ahead of the game, and won't have any difficulty. If you aren't really sure what type of connector you need, you'll just have to determine it the old-fashioned way, and that involves some observation and some measuring.

 

Why are There so Many Different Types of Hydraulic Fittings?

While there might be hundreds if not thousands of hydraulic fittings and connectors, they all boil down to

 

What are the Most Common Fitting Types?

The most common types of fittings are listed below, along with a brief description of each:

• 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.
• 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.
• Metric Taper - the most commonly used thread type in Europe, it is well known for its precise cylindrical inner and outer diameters.
• SAE Straight Thread - a very reliable and reusable thread type, these have excellent sealing because of the 90-durometer O-Rings.
• ISO - has a metric straight thread O-Ring port, which is very useful for diagnostic port applications.
• JIS-B - largely used as hose adapters for equipment designed in Japan or Korea, these usually have BSP threads
• DIN Metric - DIN is the German Industrial Standard, and these are popular throughout Germany and much of Europe
• 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

 

What are the Most Common Hydraulic Connections?

Given the fact that

• 37 degree flare
• 30 degree flare (metric)
• 45 degree flare
• 24 degree flareless (SAE)
• 24 degree flareless (DIN)
• 30 degree flare (BSPP)
• O-Ring Face Seal (ORFS)
• 60 degree NPSM Swivel
• 60 degree Cone (BSPP)
• 60 degree Cone (Metric)

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.

 

High-Quality Fittings and Connections From Sapphire Hydraulics

If you're still not sure of which kind of fittings and connections you need for your equipment, we can help you.

When you have a worn hydraulic hose fitting, you'll have to identify exactly which type you have so you know what to order from your supplier. If you've written all these connectors down somewhere, you'll be ahead of the game, and won't have any difficulty. If you aren't really sure what type of connector you need, you'll just have to determine it the old-fashioned way, and that involves some observation and some measuring.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.The most common types of fittings are listed below, along with a brief description of each:Given the fact that industrial equipment and machines are designed and produced by manufacturers all over the world, it's not surprising that there are countless different types of fittings and adapters. This enormous array of fittings makes use of a number of different sealing methods and thread forms, and while many of these would appear to look the same or at least very similar, it's not that difficult to accurately identify exactly which type it really is. The most common types of fittings are shown below, and these may be used in particular countries of the world, or by manufacturers everywhere on an individual continent.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.If you're still not sure of which kind of fittings and connections you need for your equipment, we can help you. Contact us at Sapphire Hydraulics so we can provide you with the precise fitting for your needs. Keep us in mind for any customized equipment you might need to have designed and manufactured, as well as whenever you might need repairs to your hydraulic hoses or hydraulic cylinders.

Hydraulic fittings are found across nearly every industry, with a wide variety of uses and applications. Different types of fittings are designed for different applications and specifications. It is important to be familiar with the different types of hydraulic fittings to determine the best one to suit your required application, hose size, and assembly. 

This article will explore what hydraulic hose fittings are, their applications, and the most common types, shapes, and materials they are made from. Understanding these key fitting types will allow you to make informed decisions when selecting the right fittings for your hydraulic system.

What Are Hydraulic Hose Fittings?

Quality industrial hydraulic hose fittings are a crucial component of any hydraulic system. Fittings allow hydraulic hoses to connect to various components and machines, and facilitate the transfer of hydraulic fluid and power. 

Hydraulic fittings come in various sizes, materials, types of seals, and temperature and pressure tolerances. Some can allow or prevent the flow of fluids, and some can do both. 

What Are Industrial Hydraulic Hose Fittings Used For?

Because industrial hydraulic hose fittings serve a number of purposes, they can be used for applications in a variety of industries. Some of these industries include:

• Construction and Heavy Machinery: Hydraulic hose fittings ensure reliable fluid transfer and power transmission in hydraulic systems for excavators, loaders, and cranes, enabling precise control and efficient operation.
• Manufacturing and Industrial Equipment: Machine tools, presses, and material handling equipment all need hydraulic hose fittings to ensure smooth operation and minimize downtime.
• Agriculture: Hydraulic hose fittings enable the efficient transfer of power and fluid in tractors, harvesters, and irrigation systems, thereby facilitating lifting, steering, and controlling attachments.
• Transportation and Automotive: From cars to heavy-duty trucks, hydraulic hose fittings are used in applications such as braking systems, power steering, suspension systems, and hydraulic lifts.
• Oil and Gas: This industry relies on hydraulic hose fittings for drilling, extraction, and transportation, providing fluid transfer and control in demanding environments.

3 Common Types of Industrial Hydraulic Hose Fittings

There are three main types of hydraulic hose fittings: the O-ring, the mated angle, and the tapered thread connectors. Other types are used in different and specialized applications, but those are the three most common.

A brief note on fitting gender descriptors: Conventionally, each half of a pair of mating connectors, or fittings in this case, is assigned the designation male or female. The female is generally the receptacle that receives and holds the male piece.

1. O-Ring Face Seal (ORFS)

An ORFS seal fitting has an O-ring at the flat face of the fitting. The seal is achieved by connecting the O-ring with the flat face of the female connection.

ORFS are ideal for high-pressure applications and provide a leakage-free connection. They are secure, reliable, and can eliminate leaks in hydraulic systems that operate at up to 6,000 PSI pressure. ORFS are often preferred because they are less likely to be over or under-tightened.

2. Mated Angle

These fittings have thread, followed by an angled plane (or taper) going around the whole fitting, referred to as the 'flare'. The threads can be either straight or parallel.

The threads themselves do not form the seal; instead, they push the flares together. When the male and female are threaded together, the flares meet up and are 'seated' or sealed together.

3. Tapered Threads

In a tapered thread fitting, the male has threads on the outside, and the female fitting has threads on the inside. The tapered thread deforms when they are threaded together. The consequent pressure on the couplings creates the seal. 

Under high pressure, fluid may work through the threading over time, spiraling through the threads until it finds its way out. Plumber tape may be used to prevent this; however, the tape is prone to shredding and contaminating sensitive areas. Tapered threads are also prone to being over-torqued. These disadvantages often cause tapered threads to be prohibited for use in hydraulic and pneumatic systems.

Other Hydraulic Host Fitting Features to Consider

Other important features of hydraulic hose fittings include how they attach to the hose, their shape, and the material they are made from.

Link to zkhthydraulics

Additional reading:
Sippy Cups - Las Vegas Pediatric Dentist

Permanently Crimped vs. Field Reusable

The Advantages of Incorporating Rubber Foam Insulation
Key Questions to Ask When Choosing a Ta Oil Seal

Hydraulic fittings can be attached to hydraulic hoses in two main ways: crimped fittings and field attachable fittings. 

Field attachable or reusable fittings have a socket and nipple, and can be installed anywhere without using crimping equipment.

Crimped fittings are permanently sealed with a crimping machine. Permanent hydraulic fittings are much more widespread than reusable fittings. They have a reputation for being the most secure and reliable fitting, and are widely used in the fluid power industry. 

Permanent fittings require the use of a crimping machine. Crimping machines range from large workshop variants to more portable handheld devices. Portable crimpers have become very popular and are suitable for on-site use.

Shape

Hydraulic hose fitting shapes allow hoses and components to connect, change direction, and split or combine fluid. Here is a list of common industrial hydraulic hose fitting shapes:

• Straight Fittings: These are the simplest hose fittings. They have a straight design and are used to connect two hoses or a hose to a component in a straight line.
• Elbow Fittings: These fittings have a bent or angled design. They are used when a change in direction is required in the hydraulic system. Elbow fittings come in various angles, such as 45 and 90 degrees, allowing flexibility in system design and installation.
• Tee Fittings: Tee fittings are T-shaped, and are used to split or combine hydraulic fluid flow. They enable the connection of three hoses or components, allowing for the branching or merging of hydraulic lines.
• Cross Fittings: Cross fittings, similar to tee fittings, have a cross-shaped design. They enable the connection of four hoses or components, allowing for more complex hydraulic system configurations.
• Flange Fittings: These fittings are used to connect hoses or components to a flanged surface. They provide a secure, leak-free connection, making them suitable for high-pressure applications.

Material

There are many different materials for hydraulic hose fittings. The most common fittings are made with stainless steel or brass, though the material typically depends on the industry and application. 

Let's look at the most common materials in hydraulic fittings:

Steel Hydraulic Fittings

Steel is the most common hydraulic hose fitting material. It offers excellent strength and durability. Steel can withstand temperatures ranging from -65 degrees Fahrenheit to 500 degrees Fahrenheit.

Stainless Steel Hydraulic Fittings

Steel comes in various grades, mixing iron, carbon, and other metals (such as Chromium) to create tougher, more durable, or more corrosive-resistant metals. These fittings are used when the temperature rating requires ranges from -425 degrees to 1,200 degrees Fahrenheit.

Stainless steel is used for highly corrosive environments and can be rated up to 10,000 PSI, or even up to 20,000 PSI with special designs. Stainless steel hydraulic fittings are much more expensive than other materials but are the most reliable.

Plastic Hydraulic Fittings

Fittings made of plastic are very corrosion-resistant but weaker and less durable than other materials. They are affordable but do not hold up to high-pressure ratings or high temperatures. Because of their low durability, metal fittings are preferred.

Brass Hydraulic Fittings

Brass fittings are less durable than stainless steel. However, they can meet the required SAE, ISO, DIN, DOT, and JIS standards.

Brass fittings can handle temperature ranges from -65 degrees to 400 degrees Fahrenheit. Brass offers excellent corrosion resistance and can handle up to 3,000 PSI, but lower pressure ranges are usually recommended.

Aluminum Hydraulic Fittings

Aluminum fittings are lightweight and very resistant to corrosion. Aluminum fittings are less prevalent and durable than steel, but the automotive industry has embraced them due to offering an excellent strength-to-weight ratio.

How to Choose the Right Hydraulic Hose Fitting for Your Application

Industrial hydraulic hose fittings are essential for various hydraulic systems. Understanding the different types of fittings, the materials they are made from, and their typical applications is crucial for selecting the right fittings for your specific needs. Choosing the appropriate fittings ensures your hydraulic system's safe and efficient operation, minimizing downtime and maximizing productivity.

The most important factors to consider when choosing the right hydraulic hose fitting include size, material, temperature range, and pressure requirements. You should also consider your application itself and what you need the fitting to do. Finally, if the fitting needs to be frequently connected and disconnected, you'll need to find one with easily assembles and disassembles.

IBT's Industrial Hose Products and Services

IBT's Hose Division offers an unbeatable combination of quality hydraulic hose products and outstanding service. We maintain over a million dollars in inventory of industrial hoses, fittings, and accessories so that we have everything you need on hand. 

Our KC Industrial Hose Shop can complete any custom hose assembly to your exact specifications. We can help you design and build a safe and efficient hydraulic system that best meets your needs. 
Contact us for more information on hydraulic hose fittings, our hose division services, and our crimping station offerings. You can also shop for hydraulic hose fittings and products directly on ShopIBT.com!

If you are looking for more details, kindly visit interlock din hydraulic fittings.