What is a coupling?
Couplings are used to connect hoses, pipes, fluid control components and other items for a variety of applications. Couplings are usually related to the connection or specific to the program.
Storz couplings are often used as fire hose couplings. However, due to their resistance to various media, they are widely used in many industries, including refineries, agriculture, construction, maritime safety, and military. These are symmetrical non-disconnecting joints that are connected by connecting the rolling pieces together and then rotating them on top of each other. If the seals are protected, they can be easily connected due to the portable rotating parts. Storz couplings are available in both brass and aluminum with different types of connections such as: hose column, female thread, male thread, reducer, flange and so on.
Storz connections have special specifications:
Couplings D (distance 31 mm)
C fittings (edge distance 66 mm)
Connections B (89 mm roll distance)
Connections A (roll distance 133 mm)
Complete couplings, sometimes called cam and groove couplings, are lever arm couplings that are standardized worldwide according to MIL-C-27487 and EN 14420-7 (DIN 2828). Because couplings have no threads that can get dirty or contaminated, Camlock couplings are often used in relatively dirty environments. Examples of this are septic tank pump trucks and chemical or fuel tankers. The connecting branches are driven into the pair socket and sealed by adjusting the levers correctly against the interchangeable flat seal. These couplings have full flow and can be used for liquids and solids because they do not have an internal valve. Complete couplings are available in a variety of materials: 316 stainless steel, polypropylene, brass and aluminum. Seals are available in NBR and EPDM. They are equipped with safety pins or are equipped with manual safety levers that protect the levers from accidental detachment. Different types of connection are available, including: male thread, female thread, welded, hose column, and…
Gilmin couplings are widely used for tanker trucks, silos and agricultural applications, especially in the Netherlands, Belgium and Luxembourg. Gilmin couplings are used to compress and suck liquids, powders and granules. They are symmetrical couplings designed in accordance with NFE 29572 and EN 14420-8 and made of stainless steel or aluminum. The connection of Gilmin couplings is established by connecting four vertical jaws. Couplings are commonly used in mobile systems equipped with an adjustable clamp, which is locked by rotating the jaws. To make the connection, at least one of the connection halves must be locked. Keep in mind that only the coupling with the lock is equipped with a soft seal, which can be made as follows: FKM (fluoroulastomer), PTFE (polytetrafluoroethylene) or NBR (nitrile rubber).
Mold couplings are typically used for liquid environments at temperatures up to 160 ° C. For example, they are used in the cooling circuits of injection molding machines and casting equipment. They have different types of connection: pressure connection socket, hose strip, thread, etc. and are available directly, 90 degrees or 45 degrees. There are also options for having a control valve inside the mold coupling. Due to the high temperature, they are either made of brass or made of stainless steel. DN 6 couplings (9 mm branch) are compatible with Hasco Z8 and Z9 series couplings.
Tank couplings EN 14420-6
Cone tank couplings, also known as TW couplings, are asymmetrical couplings for connecting hoses mainly for loading and unloading tank trucks. Couplings used in tank trucks throughout Europe are standardized to EN 14420-6. Couplings consist of a male and female part that can be fastened by turning the lever and attach the seal to the crown of the female part. After rotation, the clamp lever locks in place, thus creating a secure connection.
Sand blast coupling
These symmetrical couplings connect the 58 mm width of the sandblasting hoses to the moving and fixed sand block equipment without shutting off. You can tighten the joints by twisting the claws together. There is no difference between a plug and a sleeve. Sandblast couplings are available as couplings with hose connection, female thread connection, made of flexible cast iron or nylon. Some sandblasting couplings have a better sealing system that ensures that a hose or thread is placed on the seal. By doing this, the blast sand can not be compressed behind the seal, which causes blockage. In the case of all other connections, the hose is separated from the seal by a protrusion. Care must be taken when choosing the correct connection because the 40 mm garden couplings are very similar in appearance.
EDBRO and DIN 74254
Couplings made following EDBRO dimensions are commonly used in the automotive industry as economical hydraulic couplings. EDBRO dual circuit brake couplings are designed to comply with international standard DIN 74254 and can be combined with products of other manufacturers under the same standard. Distinguishes between valve couplings and without them. Valve couplings are used on tractors and prevent air leakage from the connection. Valveless couplings are used in the trailer. The connection of EDBRO couplings is done by screwing the plugs and sleeves together. Sealing the valve housing before opening the valves is part of the connection process. When disconnecting the connection, the valves are pre-closed before the connection is removed from the seal. Different brake circuits are distinguished by yellow or red cover caps.
Washing machine coupling
These couplings are designed for use in washing machines made by WAP, Kärcher or Kränzle and are safe to use with water and cleaning agents. These couplings are resistant to severe vibrations and can be used to connect guns and washing hoses or washing machines and hoses. We recommend using stainless steel couplings depending on the application. We offer special coupling couplings for functional floor guns, which are used to connect the wash launcher / floor launch with foam guns.
Quick connection of GEKA garden hose
These symmetrical and non-interlocking couplings are provided with a claw spacing of 40 mm and can be coupled to each other by rotating the claws. Brass and stainless steel garden hose fittings are ideal for pairing garden hoses quickly and economically. There is no difference between plugs and sleeves. These couplings do not have interrupt function. Before removing the hoses, you should check them for residual pressure. The risks of disconnection under pressure are reduced by using a safety coupling. These relieve pressure before the paws are released. Quick garden hose couplings are available with different fittings: female thread, male thread, hose screw connection, screw fittings for industrial fittings, quick coupler, and Gardena couplings and more. KTW-certified couplings are also available.
Gardena garden hose couplings are standard for private and professional irrigation purposes and are typically made of brass or plastic. Couplings are disconnected by inserting a plug into the connection socket and disconnecting the connection socket loosening sleeve. Gardena offers a wide range of connections with this type of connection, including: connection branches, connection sockets, connection distributors, spray guns, washing brushes and irrigation devices.
Compressed air coupling
Our compressed air couplings, also known as air hose couplings, compressed air couplings, pneumatic couplings or compressor couplings, are available in a wide range of designs for a wide variety of applications. Quick release system allows simple and easy installation by hand and does not require tools. These couplings are used in a variety of compressed air systems and are mostly used in cases with pneumatic cylinders, tools and equipment. The compression connection method allows the components to be changed quickly, so it is ideal if you have an air source for several interchangeable tools.
For more information, read the article on pneumatic actuators .
Plastic fittings Quick connection
POM and PVDF fast connection plastic fittings are designed for use in medical, chemical, food, pharmaceutical and laboratory industries. The coupling system is designed to work with one hand. Coupling and plug color coding is guaranteed to prevent media from mixing during connection. Valveless couplings are also available for a direct system. These couplings are suitable for systems with relatively low pressure amplitudes, low mechanical loads and environmental / environmental impacts for which rice is not a viable option.
Our LinkTech connector series is a unique series of couplings that are widely used in the chemical and medical technology industries. LinkTech is considered to be the largest manufacturer of interchangeable fast connection – providing fast connection and high quality fast connection. These couplings are made of POM, PP (polypropylene), polysulfone or nickel plated brass. These couplings are mainly used for low pressure liquids and gases. Sockets and connection branches can be used on or off. For applications that require frequent connection and separation, the use of plugs or couplings made of metal is recommended. Materials or sockets and plugs with or without shut-off can be arbitrarily mixed in series.
Benefits of LinkTech Connections
- An audible “click” ensures a secure connection
- Intuitive knob lock design, one-handed disconnect
- The knob type can be replaced with other connections
- Termination of the integral end eliminates leak points
- Rotates when connected and pressed
- Leak-free ring seal design
- Individual series communicate with each other
banjo type connections
Banjo fittings or relief internal screws are special pipes commonly used for hydraulic systems. They are also used in car fuel and oil systems. The male part of the banjo fittings is made of a hollow bolt and nut. The female part consists of a round ring-like collector. The main advantage of banjo fittings is that you can use them with high pressure applications more than 50 times. These connections do not need to be rotated relative to the host connections. This design minimizes the risk of damage when twisting the joints in place by turning the hose.
Common types of fittings and banjo bolts
- T banjo
- One-sided banjo bolts
- Double sided band bolts
- 3-way banjo bolt
Copper or stainless steel press fittings are used to connect pipes, such as the rapid distribution of compressed air. Fittings are available in pipe diameters of 15-54 mm and can be pressed using standard die sets (such as Mapress, Viega or SA). Copper fittings are compatible with any copper pipe manufactured in accordance with EN 1057. Stainless steel fittings are compatible with any system pipe in accordance with DIN EN 10312. Press fittings are especially suitable for use in compressed air systems. To enable this, all connections are equipped with FKM seals. See our online selection of press connections.
A few examples of compression fittings available
- Nipple transfer sleeve pressed from the inside and male thread
- Reduce socket with internal press end
- Connect the detachable screw, flat seal, both sides end of the internal press
Hose connections can be made with hose clamps or clamps or without the help of clamps or clamps, the hose can be installed to these connections. Factors determining system operating pressure are the inner diameter of the hose and the reset force of the hose. Clamp or hose connection is recommended when the system uses soft hoses, high or dynamic pressure range, or even large temperature changes. Hose fittings are available in a variety of materials such as brass, stainless steel, steel, plastic and aluminum.
There are several designs of hose fittings, all for different purposes, including:
- Press V / T / Y connections on PUR PUN and PA hoses
- T with rotational pressure on PU-, PUN- and PA hose connections
- Standard hose connection pipes
- Specialized hose fittings made for specific industries (eg medical)
Flange screw fittings
Flange screw fittings are commonly used in hydraulic pumps or motors. Cutting screw fittings or female thread are used to connect pipes or hoses. The pump or motor is screwed to the flange using a screw, an O-ring or a sealing sleeve for sealing. An important difference is made between flange screws with square hole pattern and flange with SAE 3000/6000 PSI hole pattern in accordance with ISO 6162. With the square hole pattern, the circle of the connection hole is very important and from 35, 40, or 55 mm SAE flange screw connections, the hole is connected to the special SAE flange halves on the contact surface using screws.
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