DH Instruments PK-MOL-4VCR-8VCR-38SWG User manual

Calibration Solutions
for Pressure
and Flow™
PK-mol-4VCR-8VCR-3/8SWG
Adaptor Kit
Installation Instructions
ADAPTOR KIT, P/N 401820, INCLUDES
QTY PART NO DESCRIPTION
4 102070 O-ring, 2-202 Brown Viton
4 102912 O-ring, 2-207 Brown Viton
1 103026 Adaptor, 4VCR F x 8VCR F
2 103027 Gland, 8VCR x 3/8 in. tube
1 103028 Adaptor, 8VCR M x 3/8 in. SWG
2 103029 Nut, 8VCR M (male)
2 103030 Nut, 3/8 in. SWG
2 103031 Ferrule, Front 3/8 in. SWG
2 103032 Ferrule, Rear 3/8 in. SWG
2 103040 Nut, 8VCR F (female)
This adaptor kit is for making flowpath connections
between a mid flow or high flow molstic™ or a
mid/high flow metering valve kit and DUTs (devices
under test) having 1/2 in. VCR or 3/8 in. Swagelok®
connections. The kit can also be used to adapt from
a 1E5 molbloc’s 1/2 in. VCR male inlet and outlet
fittings to 3/8 in. Swagelok when no molstic is used.
INSTRUCTIONS
When Using a High Flow molstic:
The high flow molstic outlet fitting is 1/2 in. VCR female.
• DUTs with 1/2 in. VCR male fittings can be
connected directly to the available 1/2 in. VCR
female connector on the molstic.
• To adapt from the molstic’s 1/2 in. VCR female
fitting to a device with a 3/8 in. Swagelok
connection, use an 8VCR gland with an 8VCR
male nut to connect to the molstic and connect
directly to the DUT using 3/8 in. SWG nut and
ferrules on the tube end of the 8VCR gland.
• To adapt from the molstic’s 1/2 in. VCR female
fitting to a 3/8 in. tube which leads to another
device, connect the tube to the molstic using the
8VCR M x 3/8 in. SWG adaptor.
When Using a Mid Flow molstic (without metering
valve kit):
The mid flow molstic outlet fitting is a 1/4 in. VCR
female union. To connect to devices with larger fittings,
first replace the 1/4 in. union with the 4VCR F x 8VCR F
adaptor. The bracket that supported the 1/4 in. VCR
union must be removed from the molstic using a 3
mm Allen wrench. There is no bracket included to
support the 4VCR F x 8VCR F adaptor. After installing
the 4VCR F x 8VCR F adaptor, connect to other
devices using the high flow molstic instructions
above.
When Adapting from a Mid/High Flow Metering
Valve Kit:
The mid/high flow metering valve kit may be installed
on either a mid flow or high flow molstic. Like the mid
flow molstic, the metering valve kit has a 1/4 in. VCR
female union at its outlet. To connect to devices with
larger fittings, first replace the 1/4 in. union with the
4VCR F x 8VCR F adaptor. The bracket that
supported the 1/4 in. VCR union must be removed
from the molstic using a 3 mm Allen wrench. There is
no bracket included to support the 4VCR F x 8VCR F
adaptor. After installing the 4VCR F x 8VCR F
adaptor, connect to other devices using the high flow
molstic instructions above.
When Connecting to the 1E5 molbloc (without
molstic):
When a 1E5 molbloc is used without a molstic, this
adaptor kit will connect the molbloc’s 1/2 in. male
VCR fittings to 3/8 in. Swagelok devices or
connectors. Use an 8VCR gland with an 8VCR female
nut on each end of the molbloc. Use the 3/8 in.
Swagelok nuts and ferrules for the tube end of each
gland.

PK-mol-4VCR-8VCR-3/8SWG Adaptor Kit
Installation Instructions
molbloc and molstic are trademarks, registered and otherwise, of DH Instruments, Inc.
Swagelok and VCR are registered trademarks of the Swagelok Company.
Viton is a registered trademarks of DuPont deNemours Company
Document 560044 011220
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Tel [phone]
Fax [phone]
[email protected]
www.dhinstruments.com
PROCEDURES FOR MAKING
CONNECTIONS
Soft O-Rings
• Always use the soft Viton O-rings provided for making VCR
connections to the molbloc.
The O-rings supplied for making molbloc and other VCR
connections are:
• Size: For 1/2 in. VCR fittings: 2-207 (Parker
Seal Group, O-Ring Division)
For 1/4 in. VCR fittings: 2-202 (Parker
Seal Group, O-Ring Division)
• Material: Fluorocarbon rubber (FKM), Viton
Four (4) of each size O-ring are supplied in this
adaptor kit. If frequent fittings changes will be made,
replacement O-rings should be purchased. Avoid
using a dirty or damaged O-ring.
To Connect VCR Fittings:
 Place the O-ring securely against the sealing
surface inside the female nut.
 Insert the male fitting and tighten by hand until
resistance is felt when the O-ring begins to compress.
When connecting an adaptor directly to the
molbloc, hold the molbloc by hand and rotate the
female nut.
 Turn the nut an additional 1/2 turn beyond the
point of resistance. A wrench may be used on the
nut if desired, but do not tighten beyond 1/2 turn.
If more than 1/2 turn is needed to make a leak free
connection, the O-ring may be damaged and
should be replaced.
• Never use wrenches to hold the molbloc body.
To make original Swagelok connections,
Seat the tube fully into the Swagelok fitting and,
using fingers, turn the nut until resistance is felt.
 Turn the nut 1 1/4 turns beyond this point of
resistance with a wrench.
 For reconnecting fittings later, return the nut to the
point of increasing resistance, then turn slightly
more with a wrench.