Brochure

Catalog CIC-2003-1/US
Couplings
Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
85
Couplings
Technical Information
How it Operates
Disconnected
When disconnected, spring-loaded valve assemblies
in the male and female coupling halves are sealed to
prevent refrigerant loss and the inclusion of air or
foreign materials. A spring in the male coupling half
presses the bonded poppet against sealing surface “A”
of the coupling body. Likewise, a spring in the female
coupling half presses the sleeve against sealing
surface “B” of the stem valve head. An O-ring on the
female sleeve prevents leakage between the sleeve
and coupling body.
Partially Connected
As the two coupling halves are threaded together, seal-
ing surface “C” of the male coupling body contacts the
bonded seal of the female coupling’s sleeve assembly.
At the same time, the stem valve head in the female
coupling assembly contacts the male coupling’s bonded
poppet, forcing air out of the coupling. During this
stage, both coupling halves are sealed, preventing
leakage of refrigerant.
Fully Connected
Continued tightening of the union nut (female coupling)
draws the couplings together, and opens the fluid
passage by forcing the male coupling’s poppet assem-
bly and the female coupling’s sleeve assembly open.
When fully coupled a metal ring located in the front of
the male coupling, forms a leak-tight seal between the
two coupling halves.
Female Coupling Half Male Coupling Half
Female Coupling Half Male Coupling Half
Female Coupling Half Male Coupling Half
Sealing Surface “ C”
Sealing Surface “ A”Sealing Surface “ B”
Metal Sealing Ring
5500 Series Self-Sealing Brass Coupling