Quick couplings are devices which permit easy, immediate
connections and separation of fluid and pneumatic lines. When installed in
a system quick couplings saves time by eliminating the necessity to close
valves, bleed the system, recharge with fluid and purge entrapped air
whenever an accessory is being replaced.
Material of Contractions: 1) Carbon Steel 2) Stainless Steel
3) Brass.
Selection of QRC – Functions or Need, Pressure Requirement, Type of
coupling, Pipe and Thread size, Flow Characteristics Material, Seal, End
Connections
Types Of Coupling – Three general types of quick couplings commonly
recognized are:
1. One way check valve coupling 2. Two way check valve coupling 3.
Straight through coupling 4. Tube Coupling.
One way check valve coupling
These are used originally for connecting portable air tools and
equipments to compressed air lines. However, now they are used on
many other applications. These couplings are usually built to
withstand operating pressure upto 300 PSI.
When Disconnected
The socket valve provides an instant seal, automatically shutting
off fluid flow to prevent leakage.
When Connected
The plug and socket engage securely, fully opening valve
automatically to assure maximum fluid flow.
Where non compressible fluids such as water, oil and grease are
being used, this pressure may sometimes be exceeded safely.
The coupler body should be installed on the upstream (Supply) end
of the line to shut off the fluid supply, when coupling is
disconnected. The Adaptor has no valving and upon disconnection,
exhaust, upon downstream media.
Size – ¼” to 3”
Two way check valve coupling
These are designed for connecting hydraulic lines. They are also
extensively used where a variety of other fluids are involved.
They are made to withstand pressure from 800 to 10000 PSI
depending upon size and material. They contain valves in both the
coupler and adaptor to prevent loss of fluid when the parts are
disconnected.
Size – ¼” to 2”
Straight through coupling
These are designed without valves to provide the least resistance
to fluid flow. Therefore, they require manual check valves in
both lines if fluid loss is to be prevented when the couplings
are disconnected. Straight thru couplings provide for fast simple
connection to any type of system.
Coupler bodies of this design are manufactured in brass, steel,
stainless steel. The wide range of sizes from 1/8″ to 3″ allows
the employment in fields ranging from instrumentation to steel
mills.
Size – ¼” to 3”
Tube Couplings
To connect pressure or vacuum lines to plain tubes & pipes.
The coupling is simply pushed over the end of the tube &
pressed firmly to the stop position. This provides an effective
leak-proof sealing. The tube can be disconnected merely by
pressing down the lever & pulling off the coupling. No
welding, threading or flaring of tubes.
Size – ¼” to 1 1/4” (4mm to 32mm)
