Parker Hannifin Corporation
Fluid System Connectors
Otsego, Michigan
A4
Catalog 3501E
Prestolok Metal Fittings
Tubing sizes
Tube O.D.:
1/8, 3/16, 5/32, 1/4, 5/16, 3/8, 1/2
Tube O.D. (MM):
4,6,8,10,12,14
A compact one-piece push-to-connect fitting. Designed for low
pressure circuits where assembly, disassembly and reassembly
is important. Stainless steel grab ring grips the tubing to provide
retention. Swivels are featured on all male pipe threaded shapes for
installation in tight places and for precise positioning. Prestolok should
not be used for live swivel applications. Prestolok fittings come with a
pre-applied white acrylic sealant.
Materials of Construction
Nickel Plated
Bodies:
Nickel plated brass
O-ring:
Nitrile (other compounds
available on request)
Release Button:
Polyacetal
Grab Ring:
Stainless Steel
Note:
For brass body
Prestolok replace PLP
with PLN
Nomenclature
Example: W68PLP-4-2
Attribute:
w
White Arcylic Thread
Sealant
68
Male Connector
plP
Prestolok
4
1/4" (4/16)
Tube O.D.
2
1/8" (2/16)
Pipe Thread
Specifications
Pressure
Range:
Up to 300 PSI depending on
tubing
Temperature
Range:
0
° to +200°F
note:
Vacuum applications
are dependent upon
temperature and type of
tubing used.
Recommended Tubing
Prestolok nickel plated and composite fittings
are designed to be used with the following
Parker Hannifin Parflex Division tubing.
Tubing
Series
Tubing Material
E
Linear Low Density Polyethylene
PP
Polypropylene
N
Plasticized Polyamide (Nylon)
NR
Unplasticized Polyamide (Rigid
Nylon)
U Polyurethane 90 Durometer Shore A
HU Polyurethane 95 Durometer Shore A
Other materials for Prestolok inch sized nickel
plated fittings: Polyurethane 85 Durometer
Shore A
Assembly Instructions
1.
Cut thermoplastic tubing squarely, using
Parker Tube Cutter PTC-001. Be certain
the port or mating part is clean and free of
debris.
2.
Insert tubing into fitting until it bottoms. A
slight twisting motion will ease the insertion.
Pull on tubing to verify it is properly retained
in the fitting.
3.
To disassemble, simply push the release
button against the body and remove tubing.
4.
It is recommended to trim the tubing after
every disassembly to insure a proper seal.
CAUTION:
All current manufacturers of 85A
PU tubing do not approve the use of push-to-
connect fittings with their product.
Testing has shown acceptable use with certain
O.D – I.D. combinations. Applications and
service conditions vary and therefore the use
of a tube support may be required for any 85A
PU tubing.
The following commercially available O.D. –
I.D. 85A tubing sizes require the use of a tube
support regardless of application.
5/32” – 3/32” 3/16” – 1/8” 1/4” - .170”
1/4” – 3/16”
5/16” – 1/4”
3/8” – 5/16”
1/2” – 3/8”