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B4

Parker Hannifin Corporation

Tube Fittings Division

Columbus, Ohio

http://www.parker.com/tfd

4300 Catalog

Seal-Lok™ Lite O-Ring Face Seal Tube Fittings

Dimensions and pressures for reference only, subject to change.

How Seal-Lok Lite Fittings Work

The Seal-Lok Lite fitting body face contains a 70 durometer, Ni-

trile O-ring (N0674) that is held captive in a precision machined

groove. As the nut is tightened onto the fitting body, the O-ring is

compressed between the body and flat face of the tube flange

or braze sleeve to form a tight, positive seal.

As the two faces come in contact, further tightening of the nut

produces a sharp rise in assembly torque. A solid pull of the

wrench at this point, to recommended assembly torque, com-

pletes the assembly.The sharp torque rise gives a “solid feel” at

assembly, minimizing the possibility of over tightening.

Because the sealing surfaces are flat and perpendicular to

the assembly pull, they remain virtually free of distortion dur-

ing assembly, giving Seal-Lok Lite fittings practically unlimited

remakeability. The O-ring should be inspected at each disas-

sembly and replaced when necessary. See th

e

O-ring section

for replacement O-rings.

Flex Flange Assemblies

A unique feature of the Seal-Lok Lite fitting line is the adaptability

to a line of light-duty flexible corrugated stainless steel tubes.

The Flex Flange assembly is a complete flexible 316 stainless

steel tube routing system. These factory pre-made assemblies

are available in 3/8", 1/2", 3/4" and 1" tube sizes in a variety of

assembly lengths.

The Flex Flange line offers working pressures up to 50 psig with-

out permanently deforming the stainless corrugatedassemblies.

Flex Flange tube should not be used in applications:

• Where repeated movement or extreme vibration occurs

• Involving chlorides or salts

• As support for other components

Assembly and Installation

Please refer t

o

Section T

for the assembly and installation in-

structions for Seal-Lok™ Lite fittings.

International Acceptance

Versatility:

The versatility of the Seal-Lok Lite fitting is shown

in Figure 4. A single Seal-Lok Lite fitting will mate with inch and

metric tube, hose (Push-Lok and GPH), and Flex Flange. The

universal tube nut and fitting body are used with either inch

or metric tube, thus saving on component costs. The fitting

body without the nut and sleeve is very popular as a hose/Flex

Flange adapter.

TubeWallThickness:

Recommendedmaximumtubewall thick-

nesses for Seal-Lok Lite fittings are provided i

n

Table B1

.

Table B2 – Standard Material Specifications

for Seal-Lok Lite Fittings

Fig. B5 – Seal-Lok Lite Flex Flange assembly.

Fig. B4 – Seal-Lok Lite works with inch or metric tube, hose, and

Flex Flange assemblies.

Seal-Lok

Fittings

Stainless Steel**

ASTM Type

Forged Bodies

A182

316

Bar Stock Bodies A479

316

Cold Formed Nuts

--

Machined Nuts*

A479

316

Braze Sleeves &

Braze Connectors

A276

316L

Flange Sleeves

A479

316

Seal-Lok

Lite Size

Max. Inch

Tube Wall

Max. Metric

Tube Wall

-6

0.035

1

-8

0.035

1

-12

0.049

1.5

-16

0.049

1.5

Table B1 – Recommended Max. Tube Wall Thickness

Note:

For wall

thicknesses outside

the recommended

range, contact the

Tube Fittings Division.