What is a Quick Release Coupling (QRC)?

Quick release coupling is a fitting which is used to mate fluid lines with system equipment that requires frequent connecting and disconnecting.  They are used in both pneumatic and hydraulic applications to build or discontinue the connection of a fluid pipeline.

​It is well known as quick coupler, quick coupling or quick connect coupling. Quick coupling can be made of stainless steel SS316, carbon steel and brass material for practically every application contingency. ​The fittings size is available from 1/4” to 2”. The working pressure will be determined depending on the body size.

Double End Shut Off Quick Release Coupling – High Pressure

This type of double end shut off coupling is typically used in applications with high pressure such as water, hydraulic and compressed air systems. Special annealed steel is used in the making of such couplings to provide higher reliability and strength. When disconnected, the inner valve closes both the plugs and the sockets. Their normal working pressure is typically 210 bars and the maximum working pressure is typically 215 bars.

Double End Shut Off  Quick Release Coupling – Standard Pressure

The double end shut off coupling can shut off the plug and the socket simultaneously and instantaneously upon disconnection. They can be made of steel, stainless steel, or brass at different pressure ranges, sizes, and fluid applications. They are typically used in applications with standard pressure and a working pressure of up to 100 bars. The normal working pressure would typically be 20 bars, while the maximum working pressure is 100 bars.

Purpose of Couplings

Couplings are used in machinery or lines for different purposes. The primary function of a coupling is to transfer power from one end to the other. Other common uses of couplings are listed below:

• Couplings are used for the alteration of the vibration characteristics of the rotating units
• They connect the driven part with the driving part
• Couplings introduce protection between the rotating parts (i.e. overload protection)
• Couplings serve the purpose of reducing the transmission of shock loads between two shafts
• When overload occurs, couplings are there to slip
• Couplings are used for power transmission
• They absorb shock and vibration
• Misalignment accommodation
• They are used to interrupt heat flow

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FAQs – Single Shut Off Quick Release Coupling (QRC) Upto 500 PSI MS / SS 304 / SS 316

What is a Single Shut Off Quick Release Coupling (QRC) and how is it used with pu fitting systems?
A Single Shut Off Quick Release Coupling (QRC) is designed to allow fast connection and disconnection of air or fluid lines while automatically stopping flow on disconnection, making it highly compatible and reliable for pu fitting based pneumatic and industrial systems.

Is the Single Shut Off Quick Release Coupling suitable for high-pressure applications up to 500 PSI with pu fitting connections?
Yes, this Single Shut Off Quick Release Coupling is engineered to handle pressures up to 500 PSI, ensuring secure and leak-free performance when integrated with pu fitting assemblies in demanding industrial environments.

What material options are available for Single Shut Off Quick Release Coupling used with pu fitting setups?
The Single Shut Off Quick Release Coupling is available in MS, SS 304, and SS 316, offering durability, corrosion resistance, and long service life, especially when paired with pu fitting systems in pneumatic and fluid transfer applications.

How does a Single Shut Off Quick Release Coupling improve safety in pu fitting based pneumatic systems?
A Single Shut Off Quick Release Coupling enhances operational safety by instantly shutting off media flow during disconnection, preventing air or fluid leakage and ensuring safe operation in pu fitting connected pneumatic lines.