DHI PK-MOL-KF User Manual

05/20/0405/20/04

PK-mol-KF Adaptor Kits

for molbloc-S

Instruction Sheet

®

These adaptor kits allow the conversion of the
molbloc-S ISO-KF style flange to various common
types of fittings. The molbloc-S elements with the 48
mm square bodies have 16 mm ISO-KF style vacuum
flange outlet fittings. The Downstream Tee Assembly
(PN 401884) end fitting, and the molbloc-S elements
with the 80 mm square body utilize the 25 mm ISO-KF
style vacuum flange fitting. The outlet of the molbloc­S elements with the 80 mm square body utilizes the
40 mm ISO-KF style vacuum flange. These fittings
can be converted to Swagelok tube fitting, VCR

®

face
seal, male NPT or female NPT fittings using one of the
following adaptor kits.

ADAPTOR KIT CONTENTS

16 mm ISO-KF Style Kits Include:

KIT

PART NO DESIGNATOR

401890

401891

401892

401893

402005

402006

402007

PK-MOL-KF16­1/4SWG

PK-MOL-KF16­3/8SWG

PK-MOL-KF16­1/4VCR

PK-MOL-KF16­1/2VCR

PK-MOL-KF16­1/4FNPT

PK-MOL-KF16­1/4MNPT

PK-MOL-KF16­1/2MNPT

In addition to these adaptors, the 16 mm ISO-KF kits
include:

QTY PART NO. DESCRIPTION

1 101544 16 mm ISO-KF Centering ring, Viton

1 103240 16 mm ISO-KF Overpressure ring

1 102975 16 mm ISO-KF Clamp

DESCRIPTIO

N QTY

16 mm ISO-KF
x 1/4 in. SWG

16 mm ISO-KF
x 3/8 in. SWG

16 mm ISO-KF
x 1/4 in. male
VCR

16 mm ISO-KF
x 1/2 in. male
VCR

16 mm ISO-KF
x 1/4 in. female
NPT

16 mm ISO-KF
x 1/4 in. male
NPT

16 mm ISO-KF
x 1/2 in. male
NPT

ADAPTO R

PART NO

1 103261

1 103262

1 103263

1 103264

1 103336

1 103337

1 103338

25 mm ISO-KF Style Kits Include:

KIT

PART NO DESIGNATOR

401894

401895

401896

401897

401986

401987

401988

401989

401990

401991

401992

401993

401994

401995

PK-MOL-KF25­1/4SWG

PK-MOL-KF25­3/8SWG

PK-MOL-KF25­1/4VCR

PK-MOL-KF25­1/2VCR

PK-MOL-KF25­1/2SWG

PK-MOL-KF25­3/4SWG

PK-MOL-KF25­1/4FNPT

PK-MOL-KF25­1/2FNPT

PK-MOL-KF25­3/4FNPT

PK-MOL-KF25­1FNPT

PK-MOL-KF25­1/4MNPT

PK-MOL-KF25­1/2MNPT

PK-MOL-KF25­3/4MNPT

PK-MOL-KF25­1MNPT

In addition to these adaptors, the 25 mm ISO-KF kits
include:

QTY PART NO. DESCRIPTION

1

1

1

101542

103241

102121

DESCRIPTIO

N QTY

25 mm ISO-KF
x 1/4 in. SWG

25 mm ISO-KF
x 3/8 in. SWG

25 mm ISO-KF
x 1/4 in. male
VCR

25 mm ISO-KF
x 1/2 in. male
VCR

25 mm ISO-KF
x 1/2 in. SWG

25 mm ISO-KF
x 3/4 in. SWG

25 mm ISO-KF
x 1/4 in. female
NPT

25 mm ISO-KF
x 1/2 in. female
NPT

25 mm ISO-KF
x 3/4 in. female
NPT

25 mm ISO-KF
x 1 in. female
NPT

25 mm ISO-KF
x 1/4 in. male
NPT

25 mm ISO-KF
x 1/2 in. male
NPT

25 mm ISO-KF
x 3/4 in. male
NPT

25 mm ISO-KF
x 1 in. male
NPT

ADAPTO R

PART NO

1 103265

1 103266

1 103267

1 103268

1 103317

1 103318

1 103319

1 103320

1 103321

1 103322

1 103323

1 103324

1 103325

1 103307

25 mm ISO-KF Centering ring, Viton

25 mm ISO-KF Overpressure ring

25 mm ISO-KF Clamp

05/20/0405/20/04

40 mm ISO-KF Style Kits Include:

KIT

PART NO. DESIGNATOR

401996

401997

401998

401999

402000

402001

402002

402003

402004

PK-MOL-KF40­1/2SWG

PK-MOL-KF40­3/4SWG

PK-MOL-KF40­1SWG

PK-MOL-KF40­1/2FNPT

PK-MOL-KF25­3/4FNPT

PK-MOL-KF25­1FNPT

PK-MOL-KF25­1/2MNPT

PK-MOL-KF25­3/4MNPT

PK-MOL-KF25­1MNPT

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

DESCRIPTIO

N QTY

40 mm ISO-KF
x 1/2 in. SWG

40 mm ISO-KF
x 3/4 in. SWG

40 mm ISO-KF
x 1 in. SWG

40 mm ISO-KF
x 1/2 in. female
NPT

40 mm ISO-KF
x 3/4 in. female
NPT

40 mm ISO-KF
x 1 in. female
NPT

40 mm ISO-KF
x 1/2 in. male
NPT

40 mm ISO-KF
x 3/4 in. male
NPT

40 mm ISO-KF
x 1 in. male
NPT

ADAPTO R
PART NO.

1 103327

1 103328

1 103329

1 103330

1 103331

1 103332

1 103333

1 103334

1 103252

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.

CONNECTING, DISCONNECTING AND MOUNTING MOLBLOC-S COMPONENTS WITH ISO-KF STYLE VACUUM FLANGE

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

Hold the flanges together and move the

ISO-KF Style Vacuum Flange Fittings

to fall into position on top of the clamp. Fully tighten

the wing nut by hand.
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

molbloc and molbloc-S are trademarks, registered and otherwise, of DH Instruments, Inc.

Document 560057b-01 040520

DH Instruments, Inc.

4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA

VCR is a registered trademark of the Swagelok Company.

Viton is a registered trademarks of DuPont deNemours Company.

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.

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