To attach pneumatic tools and devices to the air hose, a pneumatic quick connect, or coupler is required. This is typically stainless steel, aluminum or brass. While stainless steel is very durable, as is brass, using the aluminum quick connect couplers is not typically recommended for high-pressure applications.
There are several different considerations to keep in mind when choosing the pneumatic quick connect. By knowing the specifics of the application and the conditions for use, the choice will be much easier.
Air Pressure
The pneumatic quick coupler will be made from one solid piece of the specific metal or alloy. Within the coupler will be a seal that provides an airtight ring to prevent air flow when the tool is not in use.
The higher the air pressure or, the greater the airflow, the more important the metal or alloy. As mentioned above, aluminum is not recommended for high air pressure and air flow situations as it can deform under specific conditions.
Shape and Size
Most pneumatic quick connect will be universal fit all standard types of pneumatic tools. There are several different profiles, including those designed for metric equipment use. Additionally, there is a profile of these couplers with a much longer “nose” or area to insert into the tool. This is typically used with lower air flow requirements.
Connecting and Disconnecting
The different designs of the “noses” or inserts as well as the collar area of the coupler can make connecting to pneumatic tools and devices easier or more difficult. They typically require the sleeve from the tool to be retracted and then pushed down, while there are some with a straight push to connect option.
Quality quick connect couplers will be durable and resistant to prevent the tool from popping off if dropped or hit. This is a safety concern within a work area and an important factor to consider when comparing options and prices.
