Page 376 - Catalog4400.pdf

E-18 Hose Products Division
Parker Hannifn Corporation
Wickliffe, Ohio
www.parkerhose.com
Technical Catalog 4400 US
A
B
C
D
E
Identifying Fitting Types
Thread Interface
The sealing is assured by
the fattening of the edges of
the threads when the male is
screwed into the female ftting.
Typically the front of the male
fttings is narrower than the back
of the fttings – often referred to
as tapered threads.
O-ring
The O-ring on the male is com-
pressed against the correspond-
ing female and assures the seal.
This type of sealing mechanism
should be the preferred choice
for high-pressure applications.
Matching Angle or
Metal-to-Metal Joint
Sealing takes place where the
two angled faces of the male and
corresponding female meet and
are wedged into one another by
the tightening of the threaded
nut. The sealing surfaces can ei-
ther be convex or concave (seat)
on the male or in the head of the
pipe of the female as shown.
In general fttings can be identifed by their visual appearance, their
sealing surface/sealing type or by their thread type/form. Viewing the
following pages, the visual identifcation will be self explanatory. The
sealing mechanism and the method of thread identifcation, however,
needs further explanation
Determining Sealing
Mechanisms:
• Thread interface
• O-ring
• Matching angle or
metal-to-metal joint
• Mated angle with O-ring