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Tools & Technical Reference


Choosing a Quick Disconnect Coupler

undefined Understanding your application is key to proper selection of a quick disconnect. Use the following checklist to simplify your selection.

  • TEMPERATURE - Know your minimum and maximum temperature range. Standard temperature tolerances range from -40º F to 200º F depending on coupler material.
  • PRESSURE - What is the maximum pressure your coupling will need to withstand during operation? Quick disconnects rated to 250 psi will handle most low pressure applications. Make sure your application will not exceed the manufacturer's maximum pressure rating.
  • MEDIA - The viscosity and corrosiveness of the fluid going through the coupling needs to be considered. Make sure the media is chemically compatible with ALL coupling materials- including the seals or "O-rings". Quick Disconnect Figure 2
  • SHUTOFF OPTIONS - Do you need automatic or integral shutoff valves? Shutoff options consist of single-sided, double-sided and non-spill.
  • FLOW - What are your required gallons per minute (GPM) and pressure drop? Be sure to allow for the effect of shutoff valves and tubing connections on your calculations.
  • TUBING - What size tubing, both inner and outer diameter, are you using? Double check media compatibility.
  • TUBING CONNECTIONS - Type: Hose barb, compression fittings, and push-to-connect are the most common termination styles. Size: You will need to know ID for hose barbs, OD for push-in fittings, and tube ID and OD for compression.
  • MOUNTING OPTIONS - How is the coupling configured into your application? Common mounting options include pipe thread, panel mount, in-line or elbow.
  • SPECIAL REQUIREMENTS - Sterilization, NSF approved, USP Class VI approved materials, special packaging, color coding, keying, lot traceability etc.

When specifying a coupling, there are three important elements you should focus on - ease of installation, replacement, and serviceability.

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