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Page 20 / Catalog OEM-1, Couplings
Technical Information
Design and Operation
A complete 5780 series coupling consists
of the combination of male and female
coupling halves. Either coupling half is
available with or without a charging port,
depending on the particular application.
Coupling Halves Before
Connection
Diaphragms in the coupling halves pro-
vide a seal that prevents refrigerant loss
before connection. The male half (right
unit) contains a cutter blade, the metal
refrigerant sealing diaphragm and inter-
mediate synthetic rubber seal which pre-
vent loss of refrigerant while the coupling
is being connected. The female half (left
unit) contains a metal diaphragm which
is a leakproof metal closure.
Coupling Halves
Connected
Tightening the union nut draws the
coupling halves together, piercing and
folding both metal diaphragms back
and opening the uid passage, thereby
providing minimal restriction to ow.
When fully coupled, a metal seal forms
a permanent leakproof joint between the
two coupling halves preventing the loss
of refrigerant to the atmosphere.
The cutaway views below show male and
female coupling halves joined at 20%,
50%, and 100% connection. Note the way
the cutter blades pierce the diaphragms
and fold them back out of the ow path.
Also note the difference in the nal seal-
ing area before and after torquing.
20% connected
100% connected
Final sealing area
connected prior to torquing
Final sealing area
connected after torquing
Diaphragms
Metal
Seal
Intermediate Seal
20% Connected 50% Connected
Cutter