To begin, a quick definition. A press fitting is a type that you can attach the end of your hose into, then use a unique tool called a crimper to press a collar into place. The collar is the little ring that the hose goes inside of, and it creates a tight seal there. They’re quick and easy to install, they don’t leak, and if you ever get another piece of hose that needs connecting, you just cut it off with your crimper tool then attach another one.
The Benefits of Press Fittings:
The benefits of using press fittings are vast and numerous. This might be a bold statement to make, but I’m going to try and back it up with some good information.
- They’re quick to install; no instruction manual is needed! Just attach the end of your hose into the fitting, and it’s ready to be placed in a drink!
- Their design allows for the end of your tubing to be attached in a variety of ways.
- They can be used on any drink container that you can fit your hose into. Most people use them on soda kegs, but they also work great on buckets too!
- Direct connections are possible with press fittings, which means.
- They’re cheap! – They have a low environmental impact. One swivel barb fitting takes about 20 years’ worth of use in an aquarium to break down in a landfill.
Types of press fittings:
1) Crimp (the earliest and most common)
Crimp is press-fitting that uses a ferrule (washers to you and me) placed on either end of the hose. On one end, there will be male fittings, the other female. An O-ring between the two ferrules forms a waterproof seal when the two are pushed together.
This type of press-fitting used to be very common in the aquarium hobby, and while still being used today, has been pretty much overtaken by newer and better types of press-fitting.
This type of fitting consists of a plastic or metal part that squeezes around the hose when you tighten it. This style is only recommended for very heavy-duty use, such as in a saltwater aquarium with big pumps and large protein skimmers.
3) Hose Barb:
A hose barb is just another name for a barbed fitting, which is the type of press-fitting most commonly used in home aquaria, such as when connecting your canister filter to your tank or when you add something like an air stone.
The use of barbed fittings means that you don’t need to remove your filter when you’re doing maintenance on the aquarium, for instance.
4) Swivel Barb:
This type of fitting is fairly new to the market but is quickly becoming very popular. A swivel barb can be rotated through 360 degrees.
Applications Of Press Fittings
Press fittings are used to lock or close metal sheets using hydraulic pressure. They are mainly used in the following areas:
Metal structures, hoods, lids, and various weatherproofing elements for roofs. Structural building components for industrial buildings Construction equipment Containers, drums, etc.
Cargo transportation containers, truck trailers, gas tanks, etc.
Pressure vessels for air conditioning equipment, air compressors, etc. Food packaging machines, bread bins, etc.
Steel furniture industry:
Wine barrels, beer barrels Snack machines Cash drawers Drum pumps Weighing scales Railroad cars
Pressure-resistant walls, roofs, and ceilings. Roofing elements for residential buildings. Canopies, awnings Stone coating Air filters
Machine tool bases Machining centers Milling machines etc.
Cabs Chassis Automobile body components etc.
Press fittings are also used in the following areas:
Marine industry – Shipbuilding, Docking, and undocking. Pipes for heat exchanger systems. Hydraulic equipment.
Pulp and paper industry – Pulp preparation machine tools, presses, etc. Plastic industry – Moulds for plastic injection machines. Chemical processing industries
History & Up-Coming Technology of Press Fitting
Press fitting technology is changing the industry’s approach to assembly. It uses pneumatic cylinders to precisely position elements in their final positions before applying force to install the part permanently. This ensures better alignment, saves time and money on finishing steps, reduces scrap, boosts productivity, and helps press fitting manufacturers meet increasingly stringent quality standards.
The move away from permanent fasteners began in the 1980s when manufacturers began using snap-fit technology to assemble consumer products — such as toys — and components for other industries. For example, a manufacturer could use press fitting to install bearings and bushings in an external gearbox assembly instead of securing them with screws or bolts.
In the 1990s, press-fit technology moved into the medical industry, where companies fabricated instruments in which press-fit washers Lesly connections with preload were suitable replacements for the standard threaded connection. Press-fitting technology has improved significantly since then, and it has become attractive for use in assembly operations with stricter requirements on quality, speed, and consistency.
Typically, press-fit applications require an interference (press) fit with low to medium retention force. The press-fit connection supplies initial alignment but allows for some rotation during installation and service without the need to disassemble the parts.