PG7000, PG7601 and PG7607 are trademarks, registered and otherwise, of
DH Instruments, Inc.
Document 560046
020710
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Tel 602.431.9100
Fax 602.431.9559
www.dhinstruments.com
PK-7600-VAC-VENT
High Flow Vent Valve Kit
Vacuum Vent Valve Kit for PG7601/7607
Installation Instructions
HIGH FLOW VENT VALVE KIT, P/N 401868,
INCLUDES
QTY PART
NO DESCRIPTION
1 103123
Tee,
KF25
1
103125
Reducer, KF25 to KF16
1
103124
Vent Valve with KF10 flange
1
100352
Adaptive Centering Ring, KF16/KF10
2
101542
KF25 Centering Rings
2 102121
KF25
Clamps
1 102975
KF16
Clamp
TO INSTALL THE VENT VALVE KIT:
The high flow vacuum vent valve kit is installed
between the KF25 vacuum port on the PG7601 and
the vacuum isolation valve. It is intended to rapidly
vent the vacuum from the bell jar. It replaces the
more restrictive PG7600 Vacuum Relief Valve kit (P/N
401050).
n
Assemble the hardware as shown in the figure below.
The dashed lines indicate hardware included with the
VA-7601-REF vacuum package and on the PG7601.
Use the adaptive centering ring to seal the reducer
with the vent valve. The KF16 clamp is used to
secure the valve body (KF10 flange) to the reducer.
The adaptive centering ring is orientation
specific. Make sure that it seats flush with both
the reducer and the valve flange.
TO OPERATE THE VENT VALVE:
n
To close the valve when establishing a vacuum
under the bell jar, rotate the wing nut clockwise until
it is tight.
To open and release applied vacuum, start by slowly
opening the valve to gradually expose the bell jar to
atmospheric pressure. Do not release vacuum so
quickly that vapor formation is observed under the
bell jar.
It is not recommended to use vacuum grease on
the valve body o-ring. If it gets dirty or appears
to lose its seal: remove, clean with soap and
water and re-install.
