Calibration Solutions for Pressure and Flow
PG7600 Vacuum Relief Valve
P/N 401050 Installation Instructions
PG7600 VACUUM RELIEF VALVE, P/N 401050, INCLUDES:
QTY PART NO DESCRIPTION Vacuum relief valve assembly Gland (on PG7600 VAC port) Collar (on PG7600 VAC port) Instruction Sheet
Vacuum relief valve is shown in the closed position.

GENERAL INSTALLATION

Remove gland, collar and plastic plug from the PG7600 vacuum port. Install gland and collar onto vacuum relief valve assembly.
Collar threads left-handed. Ensure collar is fully threaded. The plastic plug is not used.
Screw the adaptor (as assembled) into the PG7600 vacuum port. Torque to 15 Nm (Newton meter).
PG7600 is a trademark, registered and otherwise, of DH Instruments, Inc.

Document 560002a

060303

DH Instruments, Inc.

4765 East Beautiful Lane Phoenix AZ 85044-5318 USA
Tel 602.431.9100 Fax 602.431.9559 dhi@dhinstruments.com 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 1 PART NO 102975 DESCRIPTION Tee, KF25 Reducer, KF25 to KF16 Vent Valve with KF10 flange Adaptive Centering Ring, KF16/KF10 KF25 Centering Rings KF25 Clamps KF16 Clamp
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:
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.
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).
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.
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.
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 dhi@dhinstruments.com www.dhinstruments.com