cheminert fittings
|
Valco Instruments Co. Inc. Sales:
800–367–8424
Fax: 713–688–8106
|
69
Standard flanged tube end fittings
1/4-28
The basic component of the Cheminert system is the polypropylene nut,
retained on PTFE or FEP tubing by a flange formed with a Cheminert flanging
tool
(page 70)
. This is an excellent method for connecting fluorocarbon tubing,
as there is no reduction of the inside diameter and no binding or twisting of the
tubing when the fitting is tightened. A mating of the parts is achieved with zero
dead volume, making this an ideal fitting for biological systems.
Cheminert tube end fittings come in twelve different colors for system color
coding, and are available for 1/16" or 1/8" OD fluorocarbon tubing. (While in
theory other polymers could be molded to form a flange, only fluorocarbons
such as PTFE or FEP have low-temperature malleability and good form retention
at operating temperatures.) Tube end fittings attach directly to Cheminert valves
and fittings, and are easily joined to each other with a union. Tightening by hand
is all that is required to make a leak-free seal at 500 psi liquid, although for long
term reliability a wrench could be used to apply an additional 1/8 turn.
Packages include the same number of washers as fittings.
Low Pressure Standard Tube End Fittings and External Nuts
TUBING
NUT
WASHER FLANGE
Flanged tube end fitting
tech tip
To make up standard
flanged tube end
fittings, use the flanging
tool on page 70.
A flanging starter kit,
complete with flanging
tool, flanging tips, and
an array of tubing
and fittings, is also
available.
(See page 70.)
more information
High pressure
fittings . . . . pp 63-66
PTFE and FEP
tubing . . . . . . . 90
External nuts for flanged tube ends
1/4-28
External nuts with female 1/4-28 threads are designed for
use on tubing with a flanged end, just like the standard
tube end fittings. Use them instead of a union or coupling
to make a zero volume butt connection.
Package of 5:
PEEK
CTFE
Tubing
Prod No
Price Prod No
Price
OD
1/16"
CEN1PK
CEN1KF
1/8"
CEN2PK
CEN2KF
Flanged fittings
1/16" OD
1/8" OD
(pkg/10)
Prod No Price
Prod No Price
Black
CF-1BK
CF-2BK
Blue
CF-1BE
CF-2BE
Brown
CF-1BR
CF-2BR
Dark gray
CF-1DG
CF-2DG
Green
CF-1G
CF-2G
Lavender/pink CF-1L
CF-2L
Natural
CF-1N
CF-2N
Orange
CF-1E
CF-2E
Purple
CF-1P
CF-2P
Red
CF-1R
CF-2R
White
CF-1W
CF-2W
Yellow
CF-1Y
CF-2Y
Assorted
(pkg/12, one of each color)
CF-1A
CF-2A
Washers
(pkg/10)
CF-W1
CF-W2
tech tip
Use our external nut
tube end fittings to
make true zero volume
butt connections
without a coupling.
CHROMalytic TECHnology Pty Ltd AUSTRALIAN Distributors e-mail:
Tel: 03 9762 2034
