Considerations for Selecting the Right QD for your Application
In order to select an optimal quick disconnect, start first with a thorough understanding of your assembly, application and operating environment.
What are the minimum and maximum operating temperatures? Based on selected coupler material, common temperatures range from -40º F to 200º F.
Know the operating pressure range the quick disconnect will be exposed to. Confirm that the quick disconnect’s maximum pressure rating will not be exceeded by your application.
What fluid will be used in the system? Check the fluid’s viscosity and corrosiveness; confirm chemical compatibility of the fluid with the quick disconnect system.
- Shutoff Options:
There are a variety of shut off options. Consider what shut off options meet the needs of your application: single-sided, double-sided, non-spill, automatic, or integral shutoff valves.
Know your application’s required pressure drop and gallons per minute (GPM). In your flow calculations, consider full system impact including the effect of shutoff valves and tubing connections.
There are a wide variety of tubing sizing, both inner and outer diameter. Know what size is specified in your application and confirm chemical compatibility with selected fluids.
- Tubing Connections:
Know your tube connection type. Are you using hose barb, compression fittings, push-to-connect or some other less common termination style?
Know your tube connection size. Properly match tube inner diameter for hose barbs. For push-in fittings, properly match outer diameter. For compression fitting, match both tube inner diameter and outer diameter.
- Mounting Options:
How have you designed your quick disconnect to fit and function within your custom application? There are a wide variety of options to mount your quick disconnect: pipe thread, panel mount, in-line or elbow.
- Special Requirements:
Do you have additional special requirements? Cleanliness requirements or sterilization? Specialty material specifications like NSF approved or USP Class VI approved? Do you have custom finishing requirements like special packaging, color coding, keying or lot traceability?
Most importantly when specifying a quick disconnect consider serviceability, replacement availability and processes as well as ease of installation.