Orfs hydraulic fittings

Orfs hydraulic fittings DEFAULT

Hydraulic Hose Fittings & Connector Sizes Charts

Hydraulic Hose Fittings Chart

Hydraulic hose fittings are very useful when it becomes necessary to connect various conductors such as tubes, pipes, and hoses in a hydraulic system. Most of these connections will have a male and female component to accommodate the connection and will assist with the process of containing and directing the flow of fluid; while also preventing any leakages and maintaining pressure in the lines. Various types of fitting allow the designer to change the flow of the fluid, to split the flow of the fluid, or to elevate the lines. Below we’ve compiled a hydraulic hose fittings chart describing some of the more common fitting sizes and types currently in use by pipefitters and other professionals.

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Thread Dash for JIC (37° Flared)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Jic Flare Fitting

Thread Dash for NPT (Dryseal Taper)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Npt Dryseal Taper

Thread Dash for SAE (45° Flared)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Sae 45 Flared

Thread Dash for ORFS (O-Ring Face Seal)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Orfs O Ring Face Seal

Dash Size for Code 61

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Code 61 Connectors

Dash Size for Code 62

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Code 62 Connectors

Metric Connections (ISO 8434-1)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Metric Connections Iso 8434 1

JIC Connections (ISO 8434-2)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Jic Connections (iso 8434 2)

BSP Connections (BS 5200)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Bsp Connections (bs 5200)

NPT Connections (SAE J476)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Npt Connections (sae J476)

Japanese Metric Connections

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Japanese Metric Connections

Japanese Gas Connections

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Japanese Gas Connections

ORFS Connections (ISO 8434-3)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Orfs Connections (iso 8434 3)

Split Flanges (SAE J518)

Series 23 / 24 / P23 / P12 / P24 / P25 / 26 Connectors

Split Flanges (sae J518)

Flare Fittings

Flare fittings are a kind of compression fitting which is generally used with some kind of metal tubing, often comprised of aluminum, copper, or soft steel, although other metals are sometimes used as well. Once assembly begins, a flare fitting is generally needed to secure the tapered end of flared tubing to the fitting, which is also tapered. This results in a leak-tight seal that can stand up to high levels of pressure. Flare adapters provide significant long-term reliability, making them suitable for most mission-critical situations, as well as for usage in locations that can be relatively inaccessible.

NPT Dryseal Taper

American National Standard Pipe Thread, often called national pipe thread standards, or NPTs, are technical standards adopted in the United States for the specific screw threads which are in general usage for pipes and threaded pipes. These standards include straight thread series as well as tapered series for a wide variety of applications requiring pressure-tight sealing or rigidity and, sometimes, both together. Threaded pipes offer an effective seal on pipes that are used to transport hydraulic fluid, steam, gases, or liquids.

The taper which is applied to NPT threads helps them to form a tight seal, because the flanks of the threads will become compressed against each other, rather than the straight thread connections or compression connections. The difference is that parallel or straight connections provide no seal at all and are merely tasked with holding the two pieces together. Pipe threads are designed to be used with or without accompanying thread sealants, depending on the particular application that they’re being used for.

O-Ring Face Seal (ORFS)

As you might guess from the name, an O-Ring Face Seal fitting makes use of an O-ring right at the face of the fitting to eliminate leaks in systems that make use of high-pressure hydraulics. ORFS connections utilize O-rings that are typically seated in the face groove of the fitting, and these elastomeric seals provide a leak-proof flared tube fitting which should eliminate hydraulic leaks when properly implemented.

As the connection is tightened, the O-ring will compress against a flat face sleeve, and this creates a metal-to-metal seal, with the O-ring providing a leak barrier. O-ring face seal connections are capable of eliminating hydraulic system leaks up to pressures reaching 6,000 psi. Another thing that makes them very popular is that ORFS connectors can easily be assembled or disassembled out in the field when it’s necessary to replace O-rings or even replace the entire assembly.

JIC Fittings

Joint Industry Council fittings, or JIC, are a type of flare fitting that is machined with a 37° seating surface. JIC connections have wide applications in fuel delivery and fluid power, especially in situations where extremely high-pressure resistance is required, withstanding up to 10,000 psi. One of the most common uses for JIC connections is in the fluid power industry, where they are frequently utilized in diagnostic and test point settings. A three-way JIC coupling can be used to provide a port inline so that any user can connect a diagnostic device or a measurement device, for the purpose of taking pressure readings, as well as to perform system and circuit diagnostics.

British Standard Pipe (BSP)

BSP screw threads have been adopted internationally by virtually all countries other than the United States, which prefers the NPT standard. BSP technical standards relate to the sealing and interconnecting of pipes and connectors which have both an external and internal thread. The pipe-fitting industry and the plumbing industry in all countries where the BSP has been adopted accept it as the standard. The two main types of BSP threads are British Standard Pipe Taper Thread and British Standard Pipe Parallel Thread, and either of these thread types can be combined with one of two joint types, those being longscrew threads and jointing threads.

Japanese Units of Measurement

Professionals within the Japanese islands used to primarily make use of the traditional Japanese units of measure, which in turn were based on the Chinese system. The Chinese system of measurement spread to the Japanese archipelago and has remained largely intact ever since the year 700. Eventually, Imperial Japan began using the metric system, and at that time all traditional units were defined on the basis of meters and kilograms.

Taiwanese and Korean units of measure are also derived from these traditional measurement units. For a certain amount of time in the 20th century, there were three competing systems of measurement in Japan, being the English system, the Metric system, and the traditional Japanese system. Eventually the metric system was standardized, and all commerce is now conducted using this system, although the traditional measurements are still used in some applications outside of the mainstream.


Split-flange connectors are generally used in situations where a high degree of resistance to pressure, vibration, and shock is needed. Split-flange connections also help to provide solid connections between a hose and pipe, or between rigid lines. Flange fittings are also highly resistant to loosening and can be quickly and easily assembled. This makes them popular for usage in tight spaces, and since there are at least 700 different kinds of configurations and sizes of split-flange connections, it’s usually very easy to find one for any given application.

Have Questions? We Have Answers!

Many of the most popular connectors used in hydraulic systems today have become standardized in this country and others, and the reason for their widespread acceptance generally has to do with their effectiveness at making a tight seal and preventing leakage. Many of these hydraulic hose fitting connections are also able to tolerate high pressure, and still perform very well without being compromised. For more information about the Hydraulic Hose Fitting that will work best in your situation, contact us today for more information.

Sours: https://sapphirehydraulics.com/hydraulic-hose-fittings-chart/

O-ring Face Seal Tube Fittings | Parker Seal-Lok | SAE J1453, ISO 8434-3

Parker O-ring face seal tube fittings are available at Motion & Flow Control Products, Inc. Stores

Parker ORFS (Seal-Lok) Available Configurations

Parker ORFS (Flat Face) Fittings are available in the following configurations:

Seal-Lok tube fittings (also known as flat face, O-ring face seal or ORFS fittings) have been proven to be very effective in eliminating leakage at higher pressures found in today's hydraulic systems. Parker Seal-Lok fittings meet or exceed the requirements of SAE J1453 and ISO 8434-3.

Parker Seal-Lok fittings feature a captive O-ring groove (CORG) design for optimal sealing, and prevention of O-ring fall-out prior to final assembly.

Parker O-ring face seal tube fittings are available in steel, stainless steel and 316 stainless steel.

The Parker Seal-Lok tube fitting consists of a nut, a fitting body, an O-ring and a sleeve. In a Seal-Lok / flat face fitting, holding control is attained by a flat-faced flange on the end of the tube. As the nut is tightened onto the fitting body, the O-ring is compressed between the body and flat face of the tube flange, or braze sleeve, to form a tight, positive seal.
Sours: https://www.mfcp.com/product/fittings/tube-fittings/o-ring-face-seal-fittings
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5 Things You Should Know about O-ring Face Seal Fittings

Guest brand Brennan is back for another informative post about O-ring Face Seal Fittings (ORFS). They are a highly popular and reliable choice in hydraulic and tube connections. Well designed ORFS connections provide a seal that is highly reliable due to its elastomeric seal and is one of the best choices for a leak-free connection. These elastomeric seals provide a leak-proof, drop-in replacement for SAE 37° flared tube fittings, literally eliminating hydraulic leaks when used properly. When the connection is tightened, the O-ring compresses against a flat face sleeve, which has been brazed onto the end of a tube. This makes a metal-to-metal seal with a leak barrier provided by the O-ring. The flat face sleeve also eliminates twisting of the tube and provides support during assembly.

O-ring face seal fittings can eliminate leaks in hydraulic systems at operating pressures as high as 6,000 PSI. They are designed specifically for applications where elastomeric seals are acceptable to overcome leakage and variations in assembly procedures. The fittings can be easily connected to a range of tubing grades by silver brazing. Also, ORFS fittings can be disassembled and reassembled in the field to facilitate the replacement of the O-ring or the entire assembly.

To ensure leak-free connections, here are 5 things you should know about O-ring face seal fittings:

1 – ORFS Fittings Help Prevent Component Failure

Many severe conditions can contribute to hydraulic component failure. Fittings and component assemblies are frequently required to work in very harsh environments, from corrosive off-shore applications to extreme heat and cold or frequent high-pressure fluctuations. These are a few applications where ORFS fittings can provide leak-tight connections to prevent failures.

O-ring face seal fittings are used in the majority of applications where there are very high pressures that are subject to flexing or pressure surges in construction equipment, agricultural equipment, oil and gas, mining, and the high-performance industrial markets. They are also the preferred connection in high vibration systems because the soft O-ring seal absorbs shock better than any metal-to-metal sealed fittings.

2 – Causes of Hydraulic Systems Leakage

While hydraulic connections that incorporate an O-ring face seal are the most reliable against leakage, it can still happen. Yet the cause is rarely the fitting itself. The primary contributors to system leaks and how often they occur include:

• Improper installation: 60%

• Poor system design: 20%

• Quality of components: 15%

• System abuse: 5%

ORFS fittings are the best line of defense against costly fluid leaks.

3 – Applications

O-ring face seal SAE J1453 fittings are popular in hydraulic lines onboard off-road vehicles such as tractors, combines, and other heavy equipment used in construction. Due to the frequent vibration and actuation of components in off-road vehicles, it is extremely important to reduce or eliminate the number of potential leak points and incidences of leakage. The SAE J1453 standard for ORFS fittings covers dimensions, threads, fitting and O-ring materials, and performance requirements for use in hydraulic applications, as well as the interface of the O-ring face and nut portion of hose stem assembly.

Flow meters that incorporate NPT end-fittings require adapters and can experience several leak points. However, units utilizing O-ring face seal fittings do not require adapters, need less space for meter installation, and ensure fewer possible leak points.

Another important factor in many applications that use ORFS fittings versus traditional metal-seal fittings is that manufacturers can extend warranty periods in equipment because of the reduction of possible leak points.

4 – System Design – Where it all starts

System design is the first consideration for leak prevention in hydraulic systems. The right components must be selected to reduce the incidences of leaks and connection failures. Typically O-ring face seal fittings are the best or sometimes the only practical choice. The following are attributes that should be taken into consideration when selecting system connections in the design phase.


The environment will determine the fitting design and selection. The use of stainless steel or a  protective coating on steel fittings extends the service life in corrosive environments. The most common finish for steel fittings is electroplated zinc to avoid rusting from the presence of oxygen, acidic gases, and moisture. However, stainless steel is the best choice for highly corrosive environments such as off-shore or applications exposed to caustic chemicals. Finally, the choice of O-ring material must meet the system conditions and application as well. A fluorocarbon or other material may need to be specified over Buna-N in certain applications, particularly in very high temperatures (see Temperature for Fittings & O-ring Seals chart below).


The dynamic pressure rating of the fitting assembly is to be equal to or higher than the system pressure. Typically, fittings are rated at a 4:1 design ratio, which applies to normal operating conditions that can withstand moderate hydraulic and mechanical shock. For severe vibration and shock operating conditions a “de-rating factor” should be applied directly to the dynamic pressure of the fitting as shown in the table below.

5 – O-Ring Face Seal Fittings Assembly Instructions

Proper assembly of the fittings is critical in all situations, but often in the field, short cuts are taken that can be a detriment to system performance. It is important to take the following steps:

First: Inspect the fitting for possible contamination or damage that may have occurred in shipping or storage. Confirm the O-ring is properly installed into the groove in the fitting’s face.

Second: Using the system’s hydraulic fluid or a light lubricant, lubricate the threads and the O-ring.

Third: Have the face seal flange mated against the O-ring and finger tighten the flange nut.

Fourth: Use the properly rated torque value to tighten the flange nut.

The above procedure is known as “wet torquing”, which uses the system’s hydraulic fluid to lubricate the O-ring and fitting threads before installation. It is important to note that the coefficient of friction can vary significantly between assemblies because of differences in plating, material (stainless steel versus carbon steel), and thickness, as well as the thread quality between different components. There is less torque required on the threads by lubricating before installation which produces a more consistent coefficient of friction, ultimately increasing clamping force on the sealing area. Over tightening the fitting will make the threads deform and yield which will cause them to lose adequate clamping force or load on the seating area. Severe conditions and overextending operation of the system can cause additional yielding, resulting in unwanted leak points. If the fitting is not wet torqued it will compromise the efficiency and service life of the system. The table below shows the recommended torque values per tube and fitting size.

These tips that Brennan has provided allow for the proper installation of O-ring face seals and therefore maximize the life of your machine. Be sure to check out MISUMI’s line of Brennan components here.

Sours: https://us.misumi-ec.com/blog/5-things-you-should-know-about-o-ring-face-seal-fittings/

Captain O-Ring ORS/ORFS (for Flat Face Fittings) Hydraulic O-Ring Seal Kit (Buna 90 / BN90-180 Piece Kit)

Captain O-Ring's 180 Piece ORS Hydraulic Buna90 (BN90) O-Ring Kit includes 8 sizes and 180 total o-rings. The kit includes #4 (1/4" Flat Face), #6 (3/8" Flat Face), #8 (1/2" Flat Face), #10 (5/8" Flat Face), #12 (3/4" Flat Face), #16 (1" Flat Face), #20 (1-1/4" Flat Face), and #24 (1-1/2" Flat Face) o-rings.

This kit contains o-rings made of Buna Nitrile (90 durometer) material, also known as BN90 or NBR90. Buna 90 is a common material used in ORS Flat Face seal applications due to its resistance to many hydraulic fluids and its flexability/sealability in low temperatures. The included size chart on the front of the kit makes sizing up o-rings quick and effortless. O-Rings are conveniently sorted by size in a shatterproof Flambeau divider box.

What to expect: This item includes 180 O-Rings in a Flambeau plastic divider case with "Captain O-Ring" branded packaging. Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC.

Note: These are round o-rings used in ORS Flat Face Fittings. The o-rings themselves are round and not flat.

Sours: https://www.amazon.com/Captain-Ring-Hydraulic-BN90-180-Piece/dp/B07B8WN9QS

Hydraulic fittings orfs

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Hydraulic Fittings Manufacturer, Hydraulic hose adapters Suppliers, Hydraulic adaptors Exporters

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