Brochure

Catalog OEM-1, Couplings / Page 11
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, sealing 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, forc-
ing 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 uid passage by
forcing the male coupling’s poppet as-
sembly 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-free metal to metal
seal between the two coupling halves.
Female Coupling Half Male Coupling Half
Sealing Surface “A”Sealing Surface “B”
Female Coupling Half Male Coupling Half
Female Coupling Half Male Coupling Half
Sealing Surface “C”
Metal Sealing Ring