Despite their compact size air hose fittings and connectors play a very important role in the overall performance of air compressors air tools and the hoses that they are used with. The compressed air fittings maintain a constant flow of air and pressure within the hoses so that the performance of the air tools is not compromised through pressure drops. Having durable and reliable air tool fittings and air tool couplers is hugely important for the safe and efficient operation of your air tools and any other process that requires to have an air feed. We have a wide range of CE approved couplings to suit any compressed air application that will enable you to extend your air supply and/or help you create more complex air systems to suit your needs. Fittings should be inspected regularly and kept in good condition.
Many of the hoses we supply will come already fitted with some type of end fitting so you can start connecting to your air compressor and tools, any addition couplers you need will be the same size.
If you’re still unsure what size you need, it’s simple, the circumference of your hose is the size coupler that you will need. You can use this quick trick to work out the circumference of your hose.
- Take your hose and a length of string.
- Wrap the string around the hose.
- Keep the string running around the diameter straight and true.
- Mark the string across both ends
- Layout the sting next to a tape measure
- Read the length of the string from mark to mark.
- This will give you the circumference of the hose.
- Take this length and divide by PI (3.1416)
- This will give you the diameter of the hose.
There are many different types of air fittings, but most air tools use one of just a few types of air connector. The main things to consider are the fitting type and the thread size. Common fixing types include ¼” BSP, ¼” PCL and 3/8” NPT.
What is BSPF and BSPM?
The British Standard Pipe (BSP) is a family of standard screw thread types that is used internationally for interconnecting and sealing pipe ends by connecting male with female threads. The thread size is measured and based on the inside of the hose fitting. When couplers are labelled as “Female Quick Release Coupler to 1/4″ BSPM” the BSPM translates to British Standard Pipe Male. In turn “F” appears if the coupler connects to female.
Can you connect two air hoses together?
Most compressed air hoses come supplied with either a thread fixing or quick release coupling. A male thread would screw into a female thread, whereas a male quick release would plug into a female quick release, so you may need a coupling to connect lines together. There are many variants and different couplers on the market it is important to keep away from the cheap ones as many of these are not CE approved and are potentially dangerous.
By using couplings there is technically no limit to how long you can make the hose. Generally, it is always better to have a single, longer hose than to have multiple hoses connected. The more connections present, the more likely it is you will experience pressure drop through an air leak.
Should I use PTFE tape on air fittings?
It is always a good working practice to use Teflon/PTFE tape on all threaded fittings. Quick-release fittings are designed to seal using internal O-rings, so any additional sealant or tape is not required. If you are experiencing leaks from a quick-release coupling, it will likely be due to incompatibility or damage/loss of the O-ring. There are many types of fittings out there that look very similar, so if you are experiencing a leak, it may possibly be down to incompatibility or different manufacturers that use different profiles of fittings.
What are Quick Release Couplings?
Quick-release couplings allow you to easily connect and disconnect airlines from either the air compressor or air tool. As previously mentioned, quick couplings are designed to seal when disconnected via an internal O-ring, eliminating the need for a shut-off valve. These connections are made up of a male part and a female part which contain the internal pressures when properly connected.
The connection also allows the joint to move, meaning less kinking and twisting of the hose, better suited for a busy workplace, to keep the area safe.
What is a PCL coupling?
PCL coupling is a major brand and recognised industry leader in quick release and safety couplings, it is disconnected simply by pulling back on the collar whilst holding the air hose, or tool connected. This can cause the air hose to whip as the compressed air escapes, so it’s best not to do this in a busy environment. However, it’s best to use this design as a single action coupling, ideal for use in a fixed application, such as directly fixed on to the compressor. While they may look similar, a PCL fitting will not properly connect to a BSP fitting.
We stock a full and comprehensive range of PCL fittings that come with a full manufacturer’s warranty.
Give our sales team a call on 01279-408277 or visit or website : https://aircompressorengineering.co.uk/