05/20/0405/20/04
40 mm ISO-KF Style Kits Include:
KIT
PART NO.
DESIGNATOR
DESCRIPTIO
N
QTY
ADAPTOR
PART NO.
401996
PK-MOL-KF40-
1/2SWG
40 mm ISO-KF
x 1/2 in. SWG
1 103327
401997
PK-MOL-KF40-
3/4SWG
40 mm ISO-KF
x 3/4 in. SWG
1 103328
401998
PK-MOL-KF40-
1SWG
40 mm ISO-KF
x 1 in. SWG
1 103329
401999
PK-MOL-KF40-
1/2FNPT
40 mm ISO-KF
x 1/2 in. female
NPT
1 103330
402000
PK-MOL-KF25-
3/4FNPT
40 mm ISO-KF
x 3/4 in. female
NPT
1 103331
402001
PK-MOL-KF25-
1FNPT
40 mm ISO-KF
x 1 in. female
NPT
1 103332
402002
PK-MOL-KF25-
1/2MNPT
40 mm ISO-KF
x 1/2 in. male
NPT
1 103333
402003
PK-MOL-KF25-
3/4MNPT
40 mm ISO-KF
x 3/4 in. male
NPT
1 103334
402004
PK-MOL-KF25-
1MNPT
40 mm ISO-KF
x 1 in. male
NPT
1 103252
molbloc and molbloc-S are trademarks, registered and otherwise, of
DH Instruments, Inc.
VCR is a registered trademark of the Swagelok Company.
Viton is a registered trademarks of DuPont deNemours Company.
Document 560057b-01
040520
DH Instruments, Inc.
Tel 602.431.9100
In addition to these adaptors, the 40 mm ISO-KF kits
include:
QTY
PART NO.
DESCRIPTION
1
103245
40 mm ISO-KF Centering ring, Viton
1
103309
40 mm ISO-KF Overpressure ring
1
103246
40 mm ISO-KF Clamp
CONNECTING, DISCONNECTING AND
MOUNTING MOLBLOC-S COMPONENTS
WITH ISO-KF STYLE VACUUM FLANGE
ISO-KF Style Vacuum Flange Fittings
The outlet connection system on the molbloc-S body
is the ISO-KF style vacuum flange. It utilizes an
internal centering ring, an external overpressure ring
and clamp. The seal is effected by the uniform
application of pressure by the clamp on the 15°
surface of the mating stainless steel flanges. These
mating flange surfaces compress a Viton
®
O-ring that
is held in place by the centering ring. The
overpressure ring keeps the O-ring in place, and
maintains a leak free connection when the system is
subjected to internal pressures above vacuum level.
This connection is reusable, rotatable, and can operate
leak free in vacuum applications up to 10
-8
Torr, and in
positive pressures of 700 kPa (100 psig).
When performing a leak test of a plumbing system
that contains the ISO-KF Style Vacuum Flanges, do
not exceed the maximum operating pressure of the
molbox: 600 kPa (87 psia) for molbox A700k; 250
kPa (36 psia) for molbox A350K.
Making and Breaking Procedure for molbloc-S
ISO-KF Vacuum Flange Connection
Place the overpressure ring past one of the
ISO-KF flanges to be mated.
Place the centering ring into the groove of the
ISO-KF flange on the outlet of the molbloc-S.
Align the mating flange against molbloc’s ISO-KF
flange, and close the gap by hand.
Hold the flanges together and move the
overpressure ring directly over the mated flanges.
Place the clamp around the mated flanges.
Swing the clamp closed. If necessary loosen the
thumbscrew to allow the thrust washer and wing nut
to fall into position on top of the clamp. Fully tighten
the wing nut by hand.
To break the fitting, hold the molbloc-S with your
hand and loosen the wing nut until the clamp can
be separated. Remove the clamp, centering ring,
and overpressure ring.
Never use wrenches to hold the molbloc-S body,
or to tighten the clamp.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Fax 602.431.9559
www.dhinstruments.com
